mesa/configure.ac

dnl Copyright © 2011-2014 Intel Corporation
dnl Copyright © 2011-2014 Emil Velikov <emil.l.velikov@gmail.com>
dnl Copyright © 2007-2010 Dan Nicholson
dnl Copyright © 2010-2014 Marek Olšák <maraeo@gmail.com>
dnl Copyright © 2010-2014 Christian König
dnl Copyright © 2012-2014 Tom Stellard <tstellar@gmail.com>
dnl Copyright © 2009-2012 Jakob Bornecrantz
dnl Copyright © 2009-2014 Jon TURNEY
dnl Copyright © 2011-2012 Benjamin Franzke
dnl Copyright © 2008-2014 David Airlie
dnl Copyright © 2009-2013 Brian Paul
dnl Copyright © 2003-2007 Keith Packard, Daniel Stone
dnl
dnl Permission is hereby granted, free of charge, to any person obtaining a
dnl copy of this software and associated documentation files (the "Software"),
dnl to deal in the Software without restriction, including without limitation
dnl the rights to use, copy, modify, merge, publish, distribute, sublicense,
dnl and/or sell copies of the Software, and to permit persons to whom the
dnl Software is furnished to do so, subject to the following conditions:
dnl
dnl The above copyright notice and this permission notice (including the next
dnl paragraph) shall be included in all copies or substantial portions of the
dnl Software.
dnl
dnl THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
dnl IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
dnl FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
dnl THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
dnl LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
dnl FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
dnl DEALINGS IN THE SOFTWARE.
dnl
dnl Process this file with autoconf to create configure.

AC_PREREQ([2.60])

dnl Tell the user about autoconf.html in the --help output
m4_divert_once([HELP_END], [
See docs/autoconf.html for more details on the options for Mesa.])

m4_define(MESA_VERSION, m4_normalize(m4_include(VERSION)))
AC_INIT([Mesa], [MESA_VERSION],
    [https://bugs.freedesktop.org/enter_bug.cgi?product=Mesa])
AC_CONFIG_AUX_DIR([bin])
AC_CONFIG_MACRO_DIR([m4])
AC_CANONICAL_SYSTEM
AM_INIT_AUTOMAKE([foreign tar-ustar dist-xz subdir-objects])

dnl We only support native Windows builds (MinGW/MSVC) through SCons.
case "$host_os" in
mingw*)
    AC_MSG_ERROR([MinGW build not supported through autoconf/automake, use SCons instead])
    ;;
esac

# Support silent build rules, requires at least automake-1.11. Disable
# by either passing --disable-silent-rules to configure or passing V=1
# to make
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])],
    [AC_SUBST([AM_DEFAULT_VERBOSITY], [1])])

m4_ifdef([AM_PROG_AR], [AM_PROG_AR])

dnl Set internal versions
OSMESA_VERSION=8
AC_SUBST([OSMESA_VERSION])
OPENCL_VERSION=1
AC_SUBST([OPENCL_VERSION])

dnl Versions for external dependencies
LIBDRM_REQUIRED=2.4.66
LIBDRM_RADEON_REQUIRED=2.4.56
LIBDRM_AMDGPU_REQUIRED=2.4.63
LIBDRM_INTEL_REQUIRED=2.4.61
LIBDRM_NVVIEUX_REQUIRED=2.4.66
LIBDRM_NOUVEAU_REQUIRED=2.4.66
LIBDRM_FREEDRENO_REQUIRED=2.4.67
DRI2PROTO_REQUIRED=2.6
DRI3PROTO_REQUIRED=1.0
PRESENTPROTO_REQUIRED=1.0
LIBUDEV_REQUIRED=151
GLPROTO_REQUIRED=1.4.14
LIBOMXIL_BELLAGIO_REQUIRED=0.0
LIBVA_REQUIRED=0.38.0
VDPAU_REQUIRED=1.1
WAYLAND_REQUIRED=1.2.0
XCB_REQUIRED=1.9.3
XCBDRI2_REQUIRED=1.8
XCBGLX_REQUIRED=1.8.1
XSHMFENCE_REQUIRED=1.1
XVMC_REQUIRED=1.0.6
PYTHON_MAKO_REQUIRED=0.3.4

dnl Check for progs
AC_PROG_CPP
AC_PROG_CC
AC_PROG_CXX
AM_PROG_CC_C_O
AM_PROG_AS
AX_CHECK_GNU_MAKE
AC_CHECK_PROGS([PYTHON2], [python2.7 python2 python])
AC_PROG_SED
AC_PROG_MKDIR_P

AC_SYS_LARGEFILE

LT_PREREQ([2.2])
LT_INIT([disable-static])

AC_CHECK_PROG(RM, rm, [rm -f])

AX_PROG_BISON([],
              AS_IF([test ! -f "$srcdir/src/compiler/glsl/glcpp/glcpp-parse.c"],
                    [AC_MSG_ERROR([bison not found - unable to compile glcpp-parse.y])]))
AX_PROG_FLEX([],
             AS_IF([test ! -f "$srcdir/src/compiler/glsl/glcpp/glcpp-lex.c"],
                   [AC_MSG_ERROR([flex not found - unable to compile glcpp-lex.l])]))

AC_CHECK_PROG(INDENT, indent, indent, cat)
if test "x$INDENT" != "xcat"; then
    # Only GNU indent is supported
    INDENT_VERSION=`indent --version | grep GNU`
    if test $? -eq 0; then
       AC_SUBST(INDENT_FLAGS, '-i4 -nut -br -brs -npcs -ce -TGLubyte -TGLbyte -TBool')
    else
       INDENT="cat"
    fi
fi

AX_CHECK_PYTHON_MAKO_MODULE($PYTHON_MAKO_REQUIRED)

if test -z "$PYTHON2"; then
    if test ! -f "$srcdir/src/util/format_srgb.c"; then
        AC_MSG_ERROR([Python not found - unable to generate sources])
    fi
else
    if test "x$acv_mako_found" = xno; then
        if test ! -f "$srcdir/src/mesa/main/format_unpack.c"; then
            AC_MSG_ERROR([Python mako module v$PYTHON_MAKO_REQUIRED or higher not found])
        fi
    fi
fi

AC_PROG_INSTALL

dnl We need a POSIX shell for parts of the build. Assume we have one
dnl in most cases.
case "$host_os" in
solaris*)
    # Solaris /bin/sh is too old/non-POSIX compliant
    AC_PATH_PROGS(POSIX_SHELL, [ksh93 ksh sh])
    SHELL="$POSIX_SHELL"
    ;;
esac

dnl clang is mostly GCC-compatible, but its version is much lower,
dnl so we have to check for it.
AC_MSG_CHECKING([if compiling with clang])

AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM([], [[
#ifndef __clang__
       not clang
#endif
]])],
[acv_mesa_CLANG=yes], [acv_mesa_CLANG=no])

AC_MSG_RESULT([$acv_mesa_CLANG])

dnl If we're using GCC, make sure that it is at least version 4.2.0.  Older
dnl versions are explictly not supported.
GEN_ASM_OFFSETS=no
USE_GNU99=no
if test "x$GCC" = xyes -a "x$acv_mesa_CLANG" = xno; then
    AC_MSG_CHECKING([whether gcc version is sufficient])
    major=0
    minor=0

    GCC_VERSION=`$CC -dumpversion`
    if test $? -eq 0; then
        GCC_VERSION_MAJOR=`echo $GCC_VERSION | cut -d. -f1`
        GCC_VERSION_MINOR=`echo $GCC_VERSION | cut -d. -f2`
    fi

    if test $GCC_VERSION_MAJOR -lt 4 -o $GCC_VERSION_MAJOR -eq 4 -a $GCC_VERSION_MINOR -lt 2 ; then
        AC_MSG_RESULT([no])
        AC_MSG_ERROR([If using GCC, version 4.2.0 or later is required.])
    else
        AC_MSG_RESULT([yes])
    fi

    if test $GCC_VERSION_MAJOR -lt 4 -o $GCC_VERSION_MAJOR -eq 4 -a $GCC_VERSION_MINOR -lt 6 ; then
        USE_GNU99=yes
    fi
    if test "x$cross_compiling" = xyes; then
        GEN_ASM_OFFSETS=yes
    fi
fi

dnl We don't support building Mesa with Sun C compiler
dnl https://bugs.freedesktop.org/show_bug.cgi?id=93189
AC_CHECK_DECL([__SUNPRO_C], [SUNCC=yes], [SUNCC=no])
if test "x$SUNCC" = xyes; then
    AC_MSG_ERROR([Building with Sun C compiler is not supported, use GCC instead.])
fi

dnl Check for compiler builtins
AX_GCC_BUILTIN([__builtin_bswap32])
AX_GCC_BUILTIN([__builtin_bswap64])
AX_GCC_BUILTIN([__builtin_clz])
AX_GCC_BUILTIN([__builtin_clzll])
AX_GCC_BUILTIN([__builtin_ctz])
AX_GCC_BUILTIN([__builtin_expect])
AX_GCC_BUILTIN([__builtin_ffs])
AX_GCC_BUILTIN([__builtin_ffsll])
AX_GCC_BUILTIN([__builtin_popcount])
AX_GCC_BUILTIN([__builtin_popcountll])
AX_GCC_BUILTIN([__builtin_unreachable])

AX_GCC_FUNC_ATTRIBUTE([const])
AX_GCC_FUNC_ATTRIBUTE([flatten])
AX_GCC_FUNC_ATTRIBUTE([format])
AX_GCC_FUNC_ATTRIBUTE([malloc])
AX_GCC_FUNC_ATTRIBUTE([packed])
AX_GCC_FUNC_ATTRIBUTE([pure])
AX_GCC_FUNC_ATTRIBUTE([unused])
AX_GCC_FUNC_ATTRIBUTE([warn_unused_result])

AM_CONDITIONAL([GEN_ASM_OFFSETS], test "x$GEN_ASM_OFFSETS" = xyes)

dnl Make sure the pkg-config macros are defined
m4_ifndef([PKG_PROG_PKG_CONFIG],
    [m4_fatal([Could not locate the pkg-config autoconf macros.
  These are usually located in /usr/share/aclocal/pkg.m4. If your macros
  are in a different location, try setting the environment variable
  ACLOCAL="aclocal -I/other/macro/dir" before running autoreconf.])])
PKG_PROG_PKG_CONFIG()

dnl LIB_DIR - library basename
LIB_DIR=`echo $libdir | $SED 's%.*/%%'`
AC_SUBST([LIB_DIR])

dnl Cache LDFLAGS and CPPFLAGS so we can add to them and restore later
_SAVE_LDFLAGS="$LDFLAGS"
_SAVE_CPPFLAGS="$CPPFLAGS"

dnl Compiler macros
DEFINES="-D__STDC_LIMIT_MACROS -D__STDC_CONSTANT_MACROS"
AC_SUBST([DEFINES])
case "$host_os" in
linux*|*-gnu*|gnu*)
    DEFINES="$DEFINES -D_GNU_SOURCE"
    ;;
solaris*)
    DEFINES="$DEFINES -DSVR4"
    ;;
cygwin*)
    DEFINES="$DEFINES -D_XOPEN_SOURCE=700"
    ;;
esac

dnl Add flags for gcc and g++
if test "x$GCC" = xyes; then
    CFLAGS="$CFLAGS -Wall"

    if test "x$USE_GNU99" = xyes; then
	CFLAGS="$CFLAGS -std=gnu99"
    else
	CFLAGS="$CFLAGS -std=c99"
    fi

    # Enable -Werror=implicit-function-declaration and
    # -Werror=missing-prototypes, if available, or otherwise, just
    # -Wmissing-prototypes.  This is particularly useful to avoid
    # generating a loadable driver module that has undefined symbols.
    save_CFLAGS="$CFLAGS"
    AC_MSG_CHECKING([whether $CC supports -Werror=missing-prototypes])
    CFLAGS="$CFLAGS -Werror=implicit-function-declaration"
    CFLAGS="$CFLAGS -Werror=missing-prototypes"
    AC_LINK_IFELSE([AC_LANG_PROGRAM()],
		   AC_MSG_RESULT([yes]),
		   [CFLAGS="$save_CFLAGS -Wmissing-prototypes";
		    AC_MSG_RESULT([no])]);

    # Enable -fvisibility=hidden if using a gcc that supports it
    save_CFLAGS="$CFLAGS"
    AC_MSG_CHECKING([whether $CC supports -fvisibility=hidden])
    VISIBILITY_CFLAGS="-fvisibility=hidden"
    CFLAGS="$CFLAGS $VISIBILITY_CFLAGS"
    AC_LINK_IFELSE([AC_LANG_PROGRAM()], AC_MSG_RESULT([yes]),
		   [VISIBILITY_CFLAGS=""; AC_MSG_RESULT([no])]);

    # Restore CFLAGS; VISIBILITY_CFLAGS are added to it where needed.
    CFLAGS=$save_CFLAGS

    # Work around aliasing bugs - developers should comment this out
    CFLAGS="$CFLAGS -fno-strict-aliasing"

    # We don't want floating-point math functions to set errno or trap
    CFLAGS="$CFLAGS -fno-math-errno -fno-trapping-math"

    # gcc's builtin memcmp is slower than glibc's
    # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43052
    CFLAGS="$CFLAGS -fno-builtin-memcmp"

    # Flags to help ensure that certain portions of the code -- and only those
    # portions -- can be built with MSVC:
    # - src/util, src/gallium/auxiliary, rc/gallium/drivers/llvmpipe, and
    # - non-Linux/Posix OpenGL portions needs to build on MSVC 2013 (which
    #   supports most of C99)
    # - the rest has no compiler compiler restrictions
    MSVC2013_COMPAT_CFLAGS="-Werror=pointer-arith"
    MSVC2013_COMPAT_CXXFLAGS="-Werror=pointer-arith"

    # Enable -Werror=vla if compiler supports it
    save_CFLAGS="$CFLAGS"
    AC_MSG_CHECKING([whether $CC supports -Werror=vla])
    CFLAGS="$CFLAGS -Werror=vla"
    AC_LINK_IFELSE([AC_LANG_PROGRAM()],
		   [MSVC2013_COMPAT_CFLAGS="$MSVC2013_COMPAT_CFLAGS -Werror=vla";
		    MSVC2013_COMPAT_CXXFLAGS="$MSVC2013_COMPAT_CXXFLAGS -Werror=vla";
		    AC_MSG_RESULT([yes])],
		    AC_MSG_RESULT([no]));
    CFLAGS="$save_CFLAGS"
fi
if test "x$GXX" = xyes; then
    CXXFLAGS="$CXXFLAGS -Wall"

    # Enable -fvisibility=hidden if using a gcc that supports it
    save_CXXFLAGS="$CXXFLAGS"
    AC_MSG_CHECKING([whether $CXX supports -fvisibility=hidden])
    VISIBILITY_CXXFLAGS="-fvisibility=hidden"
    CXXFLAGS="$CXXFLAGS $VISIBILITY_CXXFLAGS"
    AC_LANG_PUSH([C++])
    AC_LINK_IFELSE([AC_LANG_PROGRAM()], AC_MSG_RESULT([yes]),
		   [VISIBILITY_CXXFLAGS="" ; AC_MSG_RESULT([no])]);
    AC_LANG_POP([C++])

    # Restore CXXFLAGS; VISIBILITY_CXXFLAGS are added to it where needed.
    CXXFLAGS=$save_CXXFLAGS

    # Work around aliasing bugs - developers should comment this out
    CXXFLAGS="$CXXFLAGS -fno-strict-aliasing"

    # gcc's builtin memcmp is slower than glibc's
    # http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43052
    CXXFLAGS="$CXXFLAGS -fno-builtin-memcmp"
fi

AC_SUBST([MSVC2013_COMPAT_CFLAGS])
AC_SUBST([MSVC2013_COMPAT_CXXFLAGS])

dnl even if the compiler appears to support it, using visibility attributes isn't
dnl going to do anything useful currently on cygwin apart from emit lots of warnings
case "$host_os" in
cygwin*)
    VISIBILITY_CFLAGS=""
    VISIBILITY_CXXFLAGS=""
    ;;
esac

AC_SUBST([VISIBILITY_CFLAGS])
AC_SUBST([VISIBILITY_CXXFLAGS])

dnl
dnl Optional flags, check for compiler support
dnl
SSE41_CFLAGS="-msse4.1"
dnl Code compiled by GCC with -msse* assumes a 16 byte aligned
dnl stack, but on x86-32 such alignment is not guaranteed.
case "$target_cpu" in
i?86)
    SSE41_CFLAGS="$SSE41_CFLAGS -mstackrealign"
    ;;
esac
save_CFLAGS="$CFLAGS"
CFLAGS="$SSE41_CFLAGS $CFLAGS"
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#include <smmintrin.h>
int param;
int main () {
    __m128i a = _mm_set1_epi32 (param), b = _mm_set1_epi32 (param + 1), c;
    c = _mm_max_epu32(a, b);
    return _mm_cvtsi128_si32(c);
}]])], SSE41_SUPPORTED=1)
CFLAGS="$save_CFLAGS"
if test "x$SSE41_SUPPORTED" = x1; then
    DEFINES="$DEFINES -DUSE_SSE41"
fi
AM_CONDITIONAL([SSE41_SUPPORTED], [test x$SSE41_SUPPORTED = x1])
AC_SUBST([SSE41_CFLAGS], $SSE41_CFLAGS)

dnl Check for Endianness
AC_C_BIGENDIAN(
   little_endian=no,
   little_endian=yes,
   little_endian=no,
   little_endian=no
)

dnl Check for POWER8 Architecture
PWR8_CFLAGS="-mpower8-vector"
have_pwr8_intrinsics=no
AC_MSG_CHECKING(whether gcc supports -mpower8-vector)
save_CFLAGS=$CFLAGS
CFLAGS="$PWR8_CFLAGS $CFLAGS"
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
#if defined(__GNUC__) && (__GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 8))
#error "Need GCC >= 4.8 for sane POWER8 support"
#endif
#include <altivec.h>
int main () {
    vector unsigned char r;
    vector unsigned int v = vec_splat_u32 (1);
    r = __builtin_vec_vgbbd ((vector unsigned char) v);
    return 0;
}]])], have_pwr8_intrinsics=yes)
CFLAGS=$save_CFLAGS

AC_ARG_ENABLE(pwr8,
   [AC_HELP_STRING([--disable-pwr8-inst],
                   [disable POWER8-specific instructions])],
   [enable_pwr8=$enableval], [enable_pwr8=auto])

if test "x$enable_pwr8" = xno ; then
   have_pwr8_intrinsics=disabled
fi

if test $have_pwr8_intrinsics = yes && test $little_endian = yes ; then
   DEFINES="$DEFINES -D_ARCH_PWR8"
   CXXFLAGS="$CXXFLAGS $PWR8_CFLAGS"
   CFLAGS="$CFLAGS $PWR8_CFLAGS"
else
   PWR8_CFLAGS=
fi

AC_MSG_RESULT($have_pwr8_intrinsics)
if test "x$enable_pwr8" = xyes && test $have_pwr8_intrinsics = no ; then
   AC_MSG_ERROR([POWER8 compiler support not detected])
fi

if test $have_pwr8_intrinsics = yes && test $little_endian = no ; then
   AC_MSG_WARN([POWER8 optimization is enabled only on POWER8 Little-Endian])
fi

AC_SUBST([PWR8_CFLAGS], $PWR8_CFLAGS)

dnl Can't have static and shared libraries, default to static if user
dnl explicitly requested. If both disabled, set to static since shared
dnl was explicitly requested.
case "x$enable_static$enable_shared" in
xyesyes)
    AC_MSG_WARN([Cannot build static and shared libraries, disabling shared])
    enable_shared=no
    ;;
xnono)
    AC_MSG_WARN([Cannot disable both static and shared libraries, enabling shared])
    enable_shared=yes
    ;;
esac

AM_CONDITIONAL(BUILD_SHARED, test "x$enable_shared" = xyes)

dnl
dnl other compiler options
dnl
AC_ARG_ENABLE([debug],
    [AS_HELP_STRING([--enable-debug],
        [use debug compiler flags and macros @<:@default=disabled@:>@])],
    [enable_debug="$enableval"],
    [enable_debug=no]
)

AC_ARG_ENABLE([profile],
    [AS_HELP_STRING([--enable-profile],
        [enable profiling of code @<:@default=disabled@:>@])],
    [enable_profile="$enableval"],
    [enable_profile=no]
)

if test "x$enable_profile" = xyes; then
    DEFINES="$DEFINES -DPROFILE"
    if test "x$GCC" = xyes; then
        CFLAGS="$CFLAGS -fno-omit-frame-pointer"
    fi
    if test "x$GXX" = xyes; then
        CXXFLAGS="$CXXFLAGS -fno-omit-frame-pointer"
    fi
fi

if test "x$enable_debug" = xyes; then
    DEFINES="$DEFINES -DDEBUG"
    if test "x$enable_profile" = xyes; then
        AC_MSG_WARN([Debug and Profile are enabled at the same time])
    fi
    if test "x$GCC" = xyes; then
        if ! echo "$CFLAGS" | grep -q -e '-g'; then
            CFLAGS="$CFLAGS -g"
        fi
        if ! echo "$CFLAGS" | grep -q -e '-O'; then
            CFLAGS="$CFLAGS -O0"
        fi
    fi
    if test "x$GXX" = xyes; then
        if ! echo "$CXXFLAGS" | grep -q -e '-g'; then
            CXXFLAGS="$CXXFLAGS -g"
        fi
        if ! echo "$CXXFLAGS" | grep -q -e '-O'; then
            CXXFLAGS="$CXXFLAGS -O0"
        fi
    fi
else
   DEFINES="$DEFINES -DNDEBUG"
fi

dnl
dnl Check if linker supports -Bsymbolic
dnl
save_LDFLAGS=$LDFLAGS
LDFLAGS="$LDFLAGS -Wl,-Bsymbolic"
AC_MSG_CHECKING([if ld supports -Bsymbolic])
AC_LINK_IFELSE(
    [AC_LANG_SOURCE([int main() { return 0;}])],
    [AC_MSG_RESULT([yes])
        BSYMBOLIC="-Wl,-Bsymbolic";],
    [AC_MSG_RESULT([no])
        BSYMBOLIC="";])
LDFLAGS=$save_LDFLAGS

AC_SUBST([BSYMBOLIC])

dnl
dnl Check if linker supports garbage collection
dnl
save_LDFLAGS=$LDFLAGS
LDFLAGS="$LDFLAGS -Wl,--gc-sections"
AC_MSG_CHECKING([whether ld supports --gc-sections])
AC_LINK_IFELSE(
    [AC_LANG_SOURCE([static char UnusedFunc() { return 5; } int main() { return 0;}])],
    [AC_MSG_RESULT([yes])
        GC_SECTIONS="-Wl,--gc-sections";],
    [AC_MSG_RESULT([no])
        GC_SECTIONS="";])
LDFLAGS=$save_LDFLAGS

AC_SUBST([GC_SECTIONS])

dnl
dnl OpenBSD does not have DT_NEEDED entries for libc by design
dnl so when these flags are passed to ld via libtool the checks will fail
dnl
case "$host_os" in
openbsd* | darwin* )
    LD_NO_UNDEFINED="" ;;
*)
    LD_NO_UNDEFINED="-Wl,--no-undefined" ;;
esac

AC_SUBST([LD_NO_UNDEFINED])

dnl
dnl Check if linker supports version scripts
dnl
AC_MSG_CHECKING([if the linker supports version-scripts])
save_LDFLAGS=$LDFLAGS
LDFLAGS="$LDFLAGS -Wl,--version-script=conftest.map"
cat > conftest.map <<EOF
VERSION_1 {
     global:
         main;

     local:
         *;
};
EOF
AC_LINK_IFELSE(
    [AC_LANG_SOURCE([int main() { return 0;}])],
    [have_ld_version_script=yes;AC_MSG_RESULT(yes)],
    [have_ld_version_script=no; AC_MSG_RESULT(no)])
LDFLAGS=$save_LDFLAGS
AM_CONDITIONAL(HAVE_LD_VERSION_SCRIPT, test "$have_ld_version_script" = "yes")

dnl
dnl Check if linker supports dynamic list files
dnl
AC_MSG_CHECKING([if the linker supports --dynamic-list])
save_LDFLAGS=$LDFLAGS
LDFLAGS="$LDFLAGS -Wl,--dynamic-list=conftest.dyn"
cat > conftest.dyn <<EOF
{
	radeon_drm_winsys_create;
};
EOF
AC_LINK_IFELSE(
    [AC_LANG_SOURCE([int main() { return 0;}])],
    [have_ld_dynamic_list=yes;AC_MSG_RESULT(yes)],
    [have_ld_dynamic_list=no; AC_MSG_RESULT(no)])
LDFLAGS=$save_LDFLAGS
AM_CONDITIONAL(HAVE_LD_DYNAMIC_LIST, test "$have_ld_dynamic_list" = "yes")

dnl
dnl compatibility symlinks
dnl
case "$host_os" in
linux* )
    HAVE_COMPAT_SYMLINKS=yes ;;
* )
    HAVE_COMPAT_SYMLINKS=no ;;
esac

AM_CONDITIONAL(HAVE_COMPAT_SYMLINKS, test "x$HAVE_COMPAT_SYMLINKS" = xyes)

dnl
dnl library names
dnl
dnl Unfortunately we need to do a few things that libtool can't help us with,
dnl so we need some knowledge of shared library filenames:
dnl
dnl LIB_EXT is the extension used when creating symlinks for alternate
dnl filenames for a shared library which will be dynamically loaded
dnl
dnl IMP_LIB_EXT is the extension used when checking for the presence of a
dnl the file for a shared library we wish to link with
dnl
case "$host_os" in
darwin* )
    LIB_EXT='dylib'
    IMP_LIB_EXT=$LIB_EXT
    ;;
cygwin* )
    LIB_EXT='dll'
    IMP_LIB_EXT='dll.a'
    ;;
aix* )
    LIB_EXT='a'
    IMP_LIB_EXT=$LIB_EXT
    ;;
* )
    LIB_EXT='so'
    IMP_LIB_EXT=$LIB_EXT
    ;;
esac

AC_SUBST([LIB_EXT])

AC_ARG_WITH([gl-lib-name],
  [AS_HELP_STRING([--with-gl-lib-name@<:@=NAME@:>@],
    [specify GL library name @<:@default=GL@:>@])],
  [GL_LIB=$withval],
  [GL_LIB=GL])
AC_ARG_WITH([osmesa-lib-name],
  [AS_HELP_STRING([--with-osmesa-lib-name@<:@=NAME@:>@],
    [specify OSMesa library name @<:@default=OSMesa@:>@])],
  [OSMESA_LIB=$withval],
  [OSMESA_LIB=OSMesa])
AS_IF([test "x$GL_LIB" = xyes], [GL_LIB=GL])
AS_IF([test "x$OSMESA_LIB" = xyes], [OSMESA_LIB=OSMesa])

dnl
dnl Mangled Mesa support
dnl
AC_ARG_ENABLE([mangling],
  [AS_HELP_STRING([--enable-mangling],
    [enable mangled symbols and library name @<:@default=disabled@:>@])],
  [enable_mangling="${enableval}"],
  [enable_mangling=no]
)
if test "x${enable_mangling}" = "xyes" ; then
  DEFINES="${DEFINES} -DUSE_MGL_NAMESPACE"
  GL_LIB="Mangled${GL_LIB}"
  OSMESA_LIB="Mangled${OSMESA_LIB}"
fi
AC_SUBST([GL_LIB])
AC_SUBST([OSMESA_LIB])

dnl
dnl potentially-infringing-but-nobody-knows-for-sure stuff
dnl
AC_ARG_ENABLE([texture-float],
    [AS_HELP_STRING([--enable-texture-float],
        [enable floating-point textures and renderbuffers @<:@default=disabled@:>@])],
    [enable_texture_float="$enableval"],
    [enable_texture_float=no]
)
if test "x$enable_texture_float" = xyes; then
    AC_MSG_WARN([Floating-point textures enabled.])
    AC_MSG_WARN([Please consult docs/patents.txt with your lawyer before building Mesa.])
    DEFINES="$DEFINES -DTEXTURE_FLOAT_ENABLED"
fi

dnl
dnl Arch/platform-specific settings
dnl
AC_ARG_ENABLE([asm],
    [AS_HELP_STRING([--disable-asm],
        [disable assembly usage @<:@default=enabled on supported plaforms@:>@])],
    [enable_asm="$enableval"],
    [enable_asm=yes]
)
asm_arch=""
AC_MSG_CHECKING([whether to enable assembly])
test "x$enable_asm" = xno && AC_MSG_RESULT([no])
# disable if cross compiling on x86/x86_64 since we must run gen_matypes
if test "x$enable_asm" = xyes -a "x$cross_compiling" = xyes; then
    case "$host_cpu" in
    i?86 | x86_64 | amd64)
        if test "x$host_cpu" != "x$target_cpu"; then
            enable_asm=no
            AC_MSG_RESULT([no, cross compiling])
        fi
        ;;
    esac
fi
# check for supported arches
if test "x$enable_asm" = xyes; then
    case "$host_cpu" in
    i?86)
        case "$host_os" in
        linux* | *freebsd* | dragonfly* | *netbsd* | openbsd* | gnu*)
            asm_arch=x86
            ;;
        esac
        ;;
    x86_64|amd64)
        case "$host_os" in
        linux* | *freebsd* | dragonfly* | *netbsd* | openbsd*)
            asm_arch=x86_64
            ;;
        esac
        ;;
    sparc*)
        case "$host_os" in
        linux*)
            asm_arch=sparc
            ;;
        esac
        ;;
    esac

    case "$asm_arch" in
    x86)
        DEFINES="$DEFINES -DUSE_X86_ASM -DUSE_MMX_ASM -DUSE_3DNOW_ASM -DUSE_SSE_ASM"
        AC_MSG_RESULT([yes, x86])
        ;;
    x86_64|amd64)
        DEFINES="$DEFINES -DUSE_X86_64_ASM"
        AC_MSG_RESULT([yes, x86_64])
        ;;
    sparc)
        DEFINES="$DEFINES -DUSE_SPARC_ASM"
        AC_MSG_RESULT([yes, sparc])
        ;;
    *)
        AC_MSG_RESULT([no, platform not supported])
        ;;
    esac
fi

AC_CHECK_HEADER([xlocale.h], [DEFINES="$DEFINES -DHAVE_XLOCALE_H"])
AC_CHECK_HEADER([sys/sysctl.h], [DEFINES="$DEFINES -DHAVE_SYS_SYSCTL_H"])
AC_CHECK_FUNC([strtof], [DEFINES="$DEFINES -DHAVE_STRTOF"])
AC_CHECK_FUNC([mkostemp], [DEFINES="$DEFINES -DHAVE_MKOSTEMP"])

dnl Check to see if dlopen is in default libraries (like Solaris, which
dnl has it in libc), or if libdl is needed to get it.
AC_CHECK_FUNC([dlopen], [DEFINES="$DEFINES -DHAVE_DLOPEN"],
    [AC_CHECK_LIB([dl], [dlopen],
       [DEFINES="$DEFINES -DHAVE_DLOPEN"; DLOPEN_LIBS="-ldl"])])
AC_SUBST([DLOPEN_LIBS])

dnl Check if that library also has dladdr
save_LIBS="$LIBS"
LIBS="$LIBS $DLOPEN_LIBS"
AC_CHECK_FUNCS([dladdr])
LIBS="$save_LIBS"

case "$host_os" in
darwin*)
    ;;
*)
    AC_CHECK_FUNCS([clock_gettime], [CLOCK_LIB=],
                   [AC_CHECK_LIB([rt], [clock_gettime], [CLOCK_LIB=-lrt],
                                 [AC_MSG_ERROR([Could not find clock_gettime])])])
    AC_SUBST([CLOCK_LIB])
    ;;
esac

dnl See if posix_memalign is available
AC_CHECK_FUNC([posix_memalign], [DEFINES="$DEFINES -DHAVE_POSIX_MEMALIGN"])

dnl Check for pthreads
AX_PTHREAD
if test "x$ax_pthread_ok" = xno; then
    AC_MSG_ERROR([Building mesa on this platform requires pthreads])
fi
dnl AX_PTHREADS leaves PTHREAD_LIBS empty for gcc and sets PTHREAD_CFLAGS
dnl to -pthread, which causes problems if we need -lpthread to appear in
dnl pkgconfig files.
test -z "$PTHREAD_LIBS" && PTHREAD_LIBS="-lpthread"

dnl SELinux awareness.
AC_ARG_ENABLE([selinux],
    [AS_HELP_STRING([--enable-selinux],
        [Build SELinux-aware Mesa @<:@default=disabled@:>@])],
    [MESA_SELINUX="$enableval"],
    [MESA_SELINUX=no])
if test "x$enable_selinux" = "xyes"; then
    PKG_CHECK_MODULES([SELINUX], [libselinux], [],
        [AC_CHECK_HEADER([selinux/selinux.h],[],
                         [AC_MSG_ERROR([SELinux headers not found])])
         AC_CHECK_LIB([selinux],[is_selinux_enabled],[],
                      [AC_MSG_ERROR([SELinux library not found])])
         SELINUX_LIBS="-lselinux"])
    DEFINES="$DEFINES -DMESA_SELINUX"
fi
AC_SUBST([SELINUX_CFLAGS])
AC_SUBST([SELINUX_LIBS])

dnl Options for APIs
AC_ARG_ENABLE([opengl],
    [AS_HELP_STRING([--disable-opengl],
        [disable support for standard OpenGL API @<:@default=enabled@:>@])],
    [enable_opengl="$enableval"],
    [enable_opengl=yes])
AC_ARG_ENABLE([gles1],
    [AS_HELP_STRING([--disable-gles1],
        [disable support for OpenGL ES 1.x API @<:@default=enabled@:>@])],
    [enable_gles1="$enableval"],
    [enable_gles1=yes])
AC_ARG_ENABLE([gles2],
    [AS_HELP_STRING([--disable-gles2],
        [disable support for OpenGL ES 2.x API @<:@default=enabled@:>@])],
    [enable_gles2="$enableval"],
    [enable_gles2=yes])

AC_ARG_ENABLE([dri],
    [AS_HELP_STRING([--enable-dri],
        [enable DRI modules @<:@default=enabled@:>@])],
    [enable_dri="$enableval"],
    [enable_dri=yes])

case "$host_os" in
linux*)
    dri3_default=yes
    ;;
*)
    dri3_default=no
    ;;
esac

if test "x$enable_dri" = xno; then
    dri3_default=no
fi

AC_ARG_ENABLE([dri3],
    [AS_HELP_STRING([--enable-dri3],
        [enable DRI3 @<:@default=auto@:>@])],
    [enable_dri3="$enableval"],
    [enable_dri3="$dri3_default"])
AC_ARG_ENABLE([glx],
    [AS_HELP_STRING([--enable-glx],
        [enable GLX library @<:@default=enabled@:>@])],
    [enable_glx="$enableval"],
    [enable_glx=yes])
AC_ARG_ENABLE([osmesa],
    [AS_HELP_STRING([--enable-osmesa],
        [enable OSMesa library @<:@default=disabled@:>@])],
    [enable_osmesa="$enableval"],
    [enable_osmesa=no])
AC_ARG_ENABLE([gallium-osmesa],
    [AS_HELP_STRING([--enable-gallium-osmesa],
        [enable Gallium implementation of the OSMesa library @<:@default=disabled@:>@])],
    [enable_gallium_osmesa="$enableval"],
    [enable_gallium_osmesa=no])
AC_ARG_ENABLE([egl],
    [AS_HELP_STRING([--disable-egl],
        [disable EGL library @<:@default=enabled@:>@])],
    [enable_egl="$enableval"],
    [enable_egl=yes])

AC_ARG_ENABLE([xa],
    [AS_HELP_STRING([--enable-xa],
        [enable build of the XA X Acceleration API @<:@default=disabled@:>@])],
    [enable_xa="$enableval"],
    [enable_xa=no])
AC_ARG_ENABLE([gbm],
   [AS_HELP_STRING([--enable-gbm],
         [enable gbm library @<:@default=auto@:>@])],
   [enable_gbm="$enableval"],
   [enable_gbm=auto])
AC_ARG_ENABLE([nine],
    [AS_HELP_STRING([--enable-nine],
        [enable build of the nine Direct3D9 API @<:@default=no@:>@])],
    [enable_nine="$enableval"],
    [enable_nine=no])

AC_ARG_ENABLE([xvmc],
   [AS_HELP_STRING([--enable-xvmc],
         [enable xvmc library @<:@default=auto@:>@])],
   [enable_xvmc="$enableval"],
   [enable_xvmc=auto])
AC_ARG_ENABLE([vdpau],
   [AS_HELP_STRING([--enable-vdpau],
         [enable vdpau library @<:@default=auto@:>@])],
   [enable_vdpau="$enableval"],
   [enable_vdpau=auto])
AC_ARG_ENABLE([omx],
   [AS_HELP_STRING([--enable-omx],
         [enable OpenMAX library @<:@default=disabled@:>@])],
   [enable_omx="$enableval"],
   [enable_omx=no])
AC_ARG_ENABLE([va],
   [AS_HELP_STRING([--enable-va],
         [enable va library @<:@default=auto@:>@])],
   [enable_va="$enableval"],
   [enable_va=auto])
AC_ARG_ENABLE([opencl],
   [AS_HELP_STRING([--enable-opencl],
         [enable OpenCL library @<:@default=disabled@:>@])],
   [enable_opencl="$enableval"],
   [enable_opencl=no])
AC_ARG_ENABLE([opencl_icd],
   [AS_HELP_STRING([--enable-opencl-icd],
          [Build an OpenCL ICD library to be loaded by an ICD implementation
           @<:@default=disabled@:>@])],
    [enable_opencl_icd="$enableval"],
    [enable_opencl_icd=no])
AC_ARG_ENABLE([xlib-glx],
    [AS_HELP_STRING([--enable-xlib-glx],
        [make GLX library Xlib-based instead of DRI-based @<:@default=disabled@:>@])],
    [enable_xlib_glx="$enableval"],
    [enable_xlib_glx=no])

AC_ARG_ENABLE([gallium-tests],
    [AS_HELP_STRING([--enable-gallium-tests],
        [Enable optional Gallium tests) @<:@default=disabled@:>@])],
    [enable_gallium_tests="$enableval"],
    [enable_gallium_tests=no])

# Option for Gallium drivers

# Keep this in sync with the --with-gallium-drivers help string default value
GALLIUM_DRIVERS_DEFAULT="r300,r600,svga,swrast"

AC_ARG_WITH([gallium-drivers],
    [AS_HELP_STRING([--with-gallium-drivers@<:@=DIRS...@:>@],
        [comma delimited Gallium drivers list, e.g.
        "i915,ilo,nouveau,r300,r600,radeonsi,freedreno,svga,swrast,vc4,virgl"
        @<:@default=r300,r600,svga,swrast@:>@])],
    [with_gallium_drivers="$withval"],
    [with_gallium_drivers="$GALLIUM_DRIVERS_DEFAULT"])

# Doing '--without-gallium-drivers' will set this variable to 'no'.  Clear it
# here so that the script doesn't choke on an unknown driver name later.
case "$with_gallium_drivers" in
    yes) with_gallium_drivers="$GALLIUM_DRIVERS_DEFAULT" ;;
    no) with_gallium_drivers='' ;;
esac

if test "x$enable_opengl" = xno -a \
        "x$enable_gles1" = xno -a \
        "x$enable_gles2" = xno -a \
        "x$enable_nine" = xno -a \
        "x$enable_xa" = xno -a \
        "x$enable_xvmc" = xno -a \
        "x$enable_vdpau" = xno -a \
        "x$enable_omx" = xno -a \
        "x$enable_va" = xno -a \
        "x$enable_opencl" = xno; then
    AC_MSG_ERROR([at least one API should be enabled])
fi

# Building OpenGL ES1 and/or ES2 without OpenGL is not supported on mesa 9.0.x
if test "x$enable_opengl" = xno -a \
        "x$enable_gles1" = xyes; then
    AC_MSG_ERROR([Building OpenGL ES1 without OpenGL is not supported])
fi

if test "x$enable_opengl" = xno -a \
        "x$enable_gles2" = xyes; then
    AC_MSG_ERROR([Building OpenGL ES2 without OpenGL is not supported])
fi

AM_CONDITIONAL(HAVE_OPENGL, test "x$enable_opengl" = xyes)
AM_CONDITIONAL(HAVE_OPENGL_ES1, test "x$enable_gles1" = xyes)
AM_CONDITIONAL(HAVE_OPENGL_ES2, test "x$enable_gles2" = xyes)
AM_CONDITIONAL(NEED_OPENGL_COMMON, test "x$enable_opengl" = xyes -o \
                                        "x$enable_gles1" = xyes -o \
                                        "x$enable_gles2" = xyes)

if test "x$enable_glx" = xno; then
    AC_MSG_WARN([GLX disabled, disabling Xlib-GLX])
    enable_xlib_glx=no
fi

if test "x$enable_dri$enable_xlib_glx" = xyesyes; then
    AC_MSG_ERROR([DRI and Xlib-GLX cannot be built together])
fi

if test "x$enable_opengl$enable_xlib_glx" = xnoyes; then
    AC_MSG_ERROR([Xlib-GLX cannot be built without OpenGL])
fi

# Disable GLX if OpenGL is not enabled
if test "x$enable_glx$enable_opengl" = xyesno; then
    AC_MSG_WARN([OpenGL not enabled, disabling GLX])
    enable_glx=no
fi

# Disable GLX if DRI and Xlib-GLX are not enabled
if test "x$enable_glx" = xyes -a \
        "x$enable_dri" = xno -a \
        "x$enable_xlib_glx" = xno; then
    AC_MSG_WARN([Neither DRI nor Xlib-GLX enabled, disabling GLX])
    enable_glx=no
fi

AM_CONDITIONAL(HAVE_DRI_GLX, test "x$enable_glx" = xyes -a \
                                  "x$enable_dri" = xyes)

# Check for libdrm
PKG_CHECK_MODULES([LIBDRM], [libdrm >= $LIBDRM_REQUIRED],
                  [have_libdrm=yes], [have_libdrm=no])
if test "x$have_libdrm" = xyes; then
	DEFINES="$DEFINES -DHAVE_LIBDRM"
fi

# Select which platform-dependent DRI code gets built
case "$host_os" in
darwin*)
    dri_platform='apple' ;;
gnu*|cygwin*)
    dri_platform='none' ;;
*)
    dri_platform='drm' ;;
esac

if test "x$enable_dri" = xyes -a "x$dri_platform" = xdrm -a "x$have_libdrm" = xyes; then
    have_drisw_kms='yes'
fi

AM_CONDITIONAL(HAVE_DRICOMMON, test "x$enable_dri" = xyes )
AM_CONDITIONAL(HAVE_DRISW, test "x$enable_dri" = xyes )
AM_CONDITIONAL(HAVE_DRISW_KMS, test "x$have_drisw_kms" = xyes )
AM_CONDITIONAL(HAVE_DRI2, test "x$enable_dri" = xyes -a "x$dri_platform" = xdrm -a "x$have_libdrm" = xyes )
AM_CONDITIONAL(HAVE_DRI3, test "x$enable_dri3" = xyes -a "x$dri_platform" = xdrm -a "x$have_libdrm" = xyes )
AM_CONDITIONAL(HAVE_APPLEDRI, test "x$enable_dri" = xyes -a "x$dri_platform" = xapple )

AC_ARG_ENABLE([shared-glapi],
    [AS_HELP_STRING([--enable-shared-glapi],
        [Enable shared glapi for OpenGL @<:@default=enabled@:>@])],
    [enable_shared_glapi="$enableval"],
    [enable_shared_glapi=yes])

case "x$enable_opengl$enable_gles1$enable_gles2" in
x*yes*yes*)
    if test "x$enable_shared_glapi" = xno; then
        AC_MSG_ERROR([shared GLAPI required when building two or more of
                      the following APIs - opengl, gles1 gles2])
    fi
    ;;
esac

AM_CONDITIONAL(HAVE_SHARED_GLAPI, test "x$enable_shared_glapi" = xyes)

# Build the pipe-drivers as separate libraries/modules.
# Do not touch this unless you know what you are doing.
# XXX: Expose via configure option ?
enable_shared_pipe_drivers=no

dnl
dnl Driver specific build directories
dnl

if test -n "$with_gallium_drivers" -a "x$enable_glx$enable_xlib_glx" = xyesyes; then
    NEED_WINSYS_XLIB="yes"
fi

if test "x$enable_gallium_osmesa" = xyes; then
    if ! echo "$with_gallium_drivers" | grep -q 'swrast'; then
        AC_MSG_ERROR([gallium_osmesa requires the gallium swrast driver])
    fi
    if test "x$enable_osmesa" = xyes; then
        AC_MSG_ERROR([Cannot enable both classic and Gallium OSMesa implementations])
    fi
fi

AC_SUBST([MESA_LLVM])

# SHA1 hashing
AC_ARG_WITH([sha1],
        [AS_HELP_STRING([--with-sha1=libc|libmd|libnettle|libgcrypt|libcrypto|libsha1|CommonCrypto|CryptoAPI],
        [choose SHA1 implementation])])
case "x$with_sha1" in
x | xlibc | xlibmd | xlibnettle | xlibgcrypt | xlibcrypto | xlibsha1 | xCommonCrypto | xCryptoAPI)
  ;;
*)
        AC_MSG_ERROR([Illegal value for --with-sha1: $with_sha1])
esac

AC_CHECK_FUNC([SHA1Init], [HAVE_SHA1_IN_LIBC=yes])
if test "x$with_sha1" = x && test "x$HAVE_SHA1_IN_LIBC" = xyes; then
	with_sha1=libc
fi
if test "x$with_sha1" = xlibc && test "x$HAVE_SHA1_IN_LIBC" != xyes; then
	AC_MSG_ERROR([sha1 in libc requested but not found])
fi
if test "x$with_sha1" = xlibc; then
	AC_DEFINE([HAVE_SHA1_IN_LIBC], [1],
		[Use libc SHA1 functions])
	SHA1_LIBS=""
fi
AC_CHECK_FUNC([CC_SHA1_Init], [HAVE_SHA1_IN_COMMONCRYPTO=yes])
if test "x$with_sha1" = x && test "x$HAVE_SHA1_IN_COMMONCRYPTO" = xyes; then
	with_sha1=CommonCrypto
fi
if test "x$with_sha1" = xCommonCrypto && test "x$HAVE_SHA1_IN_COMMONCRYPTO" != xyes; then
	AC_MSG_ERROR([CommonCrypto requested but not found])
fi
if test "x$with_sha1" = xCommonCrypto; then
	AC_DEFINE([HAVE_SHA1_IN_COMMONCRYPTO], [1],
		[Use CommonCrypto SHA1 functions])
	SHA1_LIBS=""
fi
dnl stdcall functions cannot be tested with AC_CHECK_LIB
AC_CHECK_HEADER([wincrypt.h], [HAVE_SHA1_IN_CRYPTOAPI=yes], [], [#include <windows.h>])
if test "x$with_sha1" = x && test "x$HAVE_SHA1_IN_CRYPTOAPI" = xyes; then
	with_sha1=CryptoAPI
fi
if test "x$with_sha1" = xCryptoAPI && test "x$HAVE_SHA1_IN_CRYPTOAPI" != xyes; then
	AC_MSG_ERROR([CryptoAPI requested but not found])
fi
if test "x$with_sha1" = xCryptoAPI; then
	AC_DEFINE([HAVE_SHA1_IN_CRYPTOAPI], [1],
		[Use CryptoAPI SHA1 functions])
	SHA1_LIBS=""
fi
AC_CHECK_LIB([md], [SHA1Init], [HAVE_LIBMD=yes])
if test "x$with_sha1" = x && test "x$HAVE_LIBMD" = xyes; then
	with_sha1=libmd
fi
if test "x$with_sha1" = xlibmd && test "x$HAVE_LIBMD" != xyes; then
	AC_MSG_ERROR([libmd requested but not found])
fi
if test "x$with_sha1" = xlibmd; then
	AC_DEFINE([HAVE_SHA1_IN_LIBMD], [1],
	          [Use libmd SHA1 functions])
	SHA1_LIBS=-lmd
fi
PKG_CHECK_MODULES([LIBSHA1], [libsha1], [HAVE_LIBSHA1=yes], [HAVE_LIBSHA1=no])
if test "x$with_sha1" = x && test "x$HAVE_LIBSHA1" = xyes; then
   with_sha1=libsha1
fi
if test "x$with_sha1" = xlibsha1 && test "x$HAVE_LIBSHA1" != xyes; then
	AC_MSG_ERROR([libsha1 requested but not found])
fi
if test "x$with_sha1" = xlibsha1; then
	AC_DEFINE([HAVE_SHA1_IN_LIBSHA1], [1],
	          [Use libsha1 for SHA1])
	SHA1_LIBS=-lsha1
fi
AC_CHECK_LIB([nettle], [nettle_sha1_init], [HAVE_LIBNETTLE=yes])
if test "x$with_sha1" = x && test "x$HAVE_LIBNETTLE" = xyes; then
	with_sha1=libnettle
fi
if test "x$with_sha1" = xlibnettle && test "x$HAVE_LIBNETTLE" != xyes; then
	AC_MSG_ERROR([libnettle requested but not found])
fi
if test "x$with_sha1" = xlibnettle; then
	AC_DEFINE([HAVE_SHA1_IN_LIBNETTLE], [1],
	          [Use libnettle SHA1 functions])
	SHA1_LIBS=-lnettle
fi
AC_CHECK_LIB([gcrypt], [gcry_md_open], [HAVE_LIBGCRYPT=yes])
if test "x$with_sha1" = x && test "x$HAVE_LIBGCRYPT" = xyes; then
	with_sha1=libgcrypt
fi
if test "x$with_sha1" = xlibgcrypt && test "x$HAVE_LIBGCRYPT" != xyes; then
	AC_MSG_ERROR([libgcrypt requested but not found])
fi
if test "x$with_sha1" = xlibgcrypt; then
	AC_DEFINE([HAVE_SHA1_IN_LIBGCRYPT], [1],
	          [Use libgcrypt SHA1 functions])
	SHA1_LIBS=-lgcrypt
fi
# We don't need all of the OpenSSL libraries, just libcrypto
AC_CHECK_LIB([crypto], [SHA1_Init], [HAVE_LIBCRYPTO=yes])
PKG_CHECK_MODULES([OPENSSL], [openssl], [HAVE_OPENSSL_PKC=yes],
                  [HAVE_OPENSSL_PKC=no])
if test "x$HAVE_LIBCRYPTO" = xyes || test "x$HAVE_OPENSSL_PKC" = xyes; then
	if test "x$with_sha1" = x; then
		with_sha1=libcrypto
	fi
else
	if test "x$with_sha1" = xlibcrypto; then
		AC_MSG_ERROR([OpenSSL libcrypto requested but not found])
	fi
fi
if test "x$with_sha1" = xlibcrypto; then
	if test "x$HAVE_LIBCRYPTO" = xyes; then
		SHA1_LIBS=-lcrypto
	else
		SHA1_LIBS="$OPENSSL_LIBS"
		SHA1_CFLAGS="$OPENSSL_CFLAGS"
	fi
fi
AC_MSG_CHECKING([for SHA1 implementation])
AC_MSG_RESULT([$with_sha1])
AC_SUBST(SHA1_LIBS)
AC_SUBST(SHA1_CFLAGS)

# Enable a define for SHA1
if test "x$with_sha1" != "x"; then
	DEFINES="$DEFINES -DHAVE_SHA1"
fi

# Allow user to configure out the shader-cache feature
AC_ARG_ENABLE([shader-cache],
    AS_HELP_STRING([--disable-shader-cache], [Disable binary shader cache]),
    [enable_shader_cache="$enableval"],
    [if test "x$with_sha1" != "x"; then
        enable_shader_cache=yes
     else
        enable_shader_cache=no
     fi])
if test "x$with_sha1" = "x"; then
    if test "x$enable_shader_cache" = "xyes"; then
        AC_MSG_ERROR([Cannot enable shader cache (no SHA-1 implementation found)])
    fi
fi
AM_CONDITIONAL([ENABLE_SHADER_CACHE], [test x$enable_shader_cache = xyes])

case "$host_os" in
linux*)
    need_pci_id=yes ;;
*)
    need_pci_id=no ;;
esac

PKG_CHECK_MODULES([LIBUDEV], [libudev >= $LIBUDEV_REQUIRED],
                  have_libudev=yes, have_libudev=no)

AC_ARG_ENABLE([sysfs],
    [AS_HELP_STRING([--enable-sysfs],
        [enable /sys PCI identification @<:@default=disabled@:>@])],
    [have_sysfs="$enableval"],
    [have_sysfs=no]
)

if test "x$enable_dri" = xyes; then
    if test "$enable_static" = yes; then
        AC_MSG_ERROR([Cannot use static libraries for DRI drivers])
    fi

    # not a hard requirement as swrast does not depend on it
    if test "x$have_libdrm" = xyes; then
        DRI_PC_REQ_PRIV="libdrm >= $LIBDRM_REQUIRED"
    fi
fi

AC_ARG_ENABLE([driglx-direct],
    [AS_HELP_STRING([--disable-driglx-direct],
        [disable direct rendering in GLX and EGL for DRI \
            @<:@default=auto@:>@])],
    [driglx_direct="$enableval"],
    [driglx_direct="yes"])

dnl
dnl libGL configuration per driver
dnl
case "x$enable_glx$enable_xlib_glx" in
xyesyes)
    # Xlib-based GLX
    dri_modules="x11 xext xcb"
    PKG_CHECK_MODULES([XLIBGL], [$dri_modules])
    GL_PC_REQ_PRIV="$GL_PC_REQ_PRIV $dri_modules"
    X11_INCLUDES="$X11_INCLUDES $XLIBGL_CFLAGS"
    GL_LIB_DEPS="$XLIBGL_LIBS"
    GL_LIB_DEPS="$GL_LIB_DEPS $SELINUX_LIBS -lm $PTHREAD_LIBS $DLOPEN_LIBS"
    GL_PC_LIB_PRIV="$GL_PC_LIB_PRIV $SELINUX_LIBS -lm $PTHREAD_LIBS"
    ;;
xyesno)
    # DRI-based GLX
    PKG_CHECK_MODULES([GLPROTO], [glproto >= $GLPROTO_REQUIRED])

    # find the DRI deps for libGL
    dri_modules="x11 xext xdamage xfixes x11-xcb xcb xcb-glx >= $XCBGLX_REQUIRED"

    if test x"$driglx_direct" = xyes; then
        if test x"$dri_platform" = xdrm ; then
            DEFINES="$DEFINES -DGLX_USE_DRM"
            if test "x$have_libdrm" != xyes; then
               AC_MSG_ERROR([Direct rendering requires libdrm >= $LIBDRM_REQUIRED])
            fi

            PKG_CHECK_MODULES([DRI2PROTO], [dri2proto >= $DRI2PROTO_REQUIRED])
            GL_PC_REQ_PRIV="$GL_PC_REQ_PRIV libdrm >= $LIBDRM_REQUIRED"
            if test x"$enable_dri3" = xyes; then
               PKG_CHECK_MODULES([DRI3PROTO], [dri3proto >= $DRI3PROTO_REQUIRED])
               PKG_CHECK_MODULES([PRESENTPROTO], [presentproto >= $PRESENTPROTO_REQUIRED])
            fi

            if test x"$enable_dri" = xyes; then
               dri_modules="$dri_modules xcb-dri2 >= $XCBDRI2_REQUIRED"
            fi

            if test x"$enable_dri3" = xyes; then
               PKG_CHECK_EXISTS([xcb >= $XCB_REQUIRED], [], AC_MSG_ERROR([DRI3 requires xcb >= $XCB_REQUIRED]))
               dri3_modules="xcb-dri3 xcb-present xcb-sync xshmfence >= $XSHMFENCE_REQUIRED"
               PKG_CHECK_MODULES([XCB_DRI3], [$dri3_modules])
            fi
        fi
        if test x"$dri_platform" = xapple ; then
            DEFINES="$DEFINES -DGLX_USE_APPLEGL"
        fi
    fi

    # add xf86vidmode if available
    PKG_CHECK_MODULES([XF86VIDMODE], [xxf86vm], HAVE_XF86VIDMODE=yes, HAVE_XF86VIDMODE=no)
    if test "$HAVE_XF86VIDMODE" = yes ; then
        dri_modules="$dri_modules xxf86vm"
    fi

    PKG_CHECK_MODULES([DRIGL], [$dri_modules])
    GL_PC_REQ_PRIV="$GL_PC_REQ_PRIV $dri_modules"
    X11_INCLUDES="$X11_INCLUDES $DRIGL_CFLAGS"
    GL_LIB_DEPS="$DRIGL_LIBS"

    # need DRM libs, $PTHREAD_LIBS, etc.
    GL_LIB_DEPS="$GL_LIB_DEPS $LIBDRM_LIBS -lm $PTHREAD_LIBS $DLOPEN_LIBS"
    GL_PC_LIB_PRIV="-lm $PTHREAD_LIBS $DLOPEN_LIBS"
    ;;
esac

have_pci_id=no
if test "$have_libudev" = yes; then
    DEFINES="$DEFINES -DHAVE_LIBUDEV"
    have_pci_id=yes
fi

if test "$have_sysfs" = yes; then
    DEFINES="$DEFINES -DHAVE_SYSFS"
    have_pci_id=yes
fi

# This is outside the case (above) so that it is invoked even for non-GLX
# builds.
AM_CONDITIONAL(HAVE_XF86VIDMODE, test "x$HAVE_XF86VIDMODE" = xyes)

GLESv1_CM_LIB_DEPS="$LIBDRM_LIBS -lm $PTHREAD_LIBS $DLOPEN_LIBS"
GLESv1_CM_PC_LIB_PRIV="-lm $PTHREAD_LIBS $DLOPEN_LIBS"
GLESv2_LIB_DEPS="$LIBDRM_LIBS -lm $PTHREAD_LIBS $DLOPEN_LIBS"
GLESv2_PC_LIB_PRIV="-lm $PTHREAD_LIBS $DLOPEN_LIBS"

AC_SUBST([X11_INCLUDES])
AC_SUBST([GL_LIB_DEPS])
AC_SUBST([GL_PC_REQ_PRIV])
AC_SUBST([GL_PC_LIB_PRIV])
AC_SUBST([GL_PC_CFLAGS])
AC_SUBST([DRI_PC_REQ_PRIV])
AC_SUBST([GLESv1_CM_LIB_DEPS])
AC_SUBST([GLESv1_CM_PC_LIB_PRIV])
AC_SUBST([GLESv2_LIB_DEPS])
AC_SUBST([GLESv2_PC_LIB_PRIV])

AC_SUBST([HAVE_XF86VIDMODE])

dnl
dnl More GLX setup
dnl
case "x$enable_glx$enable_xlib_glx" in
xyesyes)
    DEFINES="$DEFINES -DUSE_XSHM"
    ;;
xyesno)
    DEFINES="$DEFINES -DGLX_INDIRECT_RENDERING"
    if test "x$driglx_direct" = xyes; then
        DEFINES="$DEFINES -DGLX_DIRECT_RENDERING"
    fi
    ;;
esac

dnl
dnl TLS detection
dnl

AC_ARG_ENABLE([glx-tls],
    [AS_HELP_STRING([--enable-glx-tls],
        [enable TLS support in GLX @<:@default=disabled@:>@])],
    [GLX_USE_TLS="$enableval"],
    [GLX_USE_TLS=no])
AC_SUBST(GLX_TLS, ${GLX_USE_TLS})

AS_IF([test "x$GLX_USE_TLS" = xyes -a "x$ax_pthread_ok" = xyes],
      [DEFINES="${DEFINES} -DGLX_USE_TLS"])

dnl Read-only text section on x86 hardened platforms
AC_ARG_ENABLE([glx-read-only-text],
    [AS_HELP_STRING([--enable-glx-read-only-text],
        [Disable writable .text section on x86 (decreases performance) @<:@default=disabled@:>@])],
    [enable_glx_read_only_text="$enableval"],
    [enable_glx_read_only_text=no])
if test "x$enable_glx_read_only_text" = xyes; then
    DEFINES="$DEFINES -DGLX_X86_READONLY_TEXT"
fi

dnl
dnl More DRI setup
dnl
dnl Directory for DRI drivers
AC_ARG_WITH([dri-driverdir],
    [AS_HELP_STRING([--with-dri-driverdir=DIR],
        [directory for the DRI drivers @<:@${libdir}/dri@:>@])],
    [DRI_DRIVER_INSTALL_DIR="$withval"],
    [DRI_DRIVER_INSTALL_DIR='${libdir}/dri'])
AC_SUBST([DRI_DRIVER_INSTALL_DIR])
dnl Extra search path for DRI drivers
AC_ARG_WITH([dri-searchpath],
    [AS_HELP_STRING([--with-dri-searchpath=DIRS...],
        [semicolon delimited DRI driver search directories @<:@${libdir}/dri@:>@])],
    [DRI_DRIVER_SEARCH_DIR="$withval"],
    [DRI_DRIVER_SEARCH_DIR='${DRI_DRIVER_INSTALL_DIR}'])
AC_SUBST([DRI_DRIVER_SEARCH_DIR])
dnl Which drivers to build - default is chosen by platform
AC_ARG_WITH([dri-drivers],
    [AS_HELP_STRING([--with-dri-drivers@<:@=DIRS...@:>@],
        [comma delimited classic DRI drivers list, e.g.
        "swrast,i965,radeon" @<:@default=auto@:>@])],
    [with_dri_drivers="$withval"],
    [with_dri_drivers=auto])

if test "x$with_dri_drivers" = xauto; then
    if test "x$enable_opengl" = xyes -a "x$enable_dri" = xyes; then
        with_dri_drivers="yes"
    else
        with_dri_drivers="no"
    fi
fi
if test "x$with_dri_drivers" = xno; then
    with_dri_drivers=''
fi

dnl If $with_dri_drivers is yes, drivers will be added through
dnl platform checks. Set DEFINES and LIB_DEPS
if test "x$enable_dri" = xyes; then
    # Platform specific settings and drivers to build
    case "$host_os" in
    linux*)
        DEFINES="$DEFINES -DHAVE_ALIAS"
        if test "x$enable_dri3" = xyes; then
            DEFINES="$DEFINES -DHAVE_DRI3"
        fi

        if test "x$have_pci_id" != xyes; then
            AC_MSG_ERROR([libudev-dev or sysfs required for building DRI])
        fi

        case "$host_cpu" in
        powerpc* | sparc*)
            # Build only the drivers for cards that exist on PowerPC/sparc
            if test "x$with_dri_drivers" = "xyes"; then
                with_dri_drivers="r200 radeon swrast"
            fi
            ;;
        esac
        ;;
    *freebsd* | dragonfly* | *netbsd* | openbsd*)
        DEFINES="$DEFINES -DHAVE_ALIAS"
        ;;
    gnu*)
        DEFINES="$DEFINES -DHAVE_ALIAS"
        ;;
    cygwin*)
        if test "x$with_dri_drivers" = "xyes"; then
            with_dri_drivers="swrast"
        fi
        ;;
    darwin*)
        DEFINES="$DEFINES -DGLX_ALIAS_UNSUPPORTED -DBUILDING_MESA"
        if test "x$with_dri_drivers" = "xyes"; then
            with_dri_drivers="swrast"
        fi
        ;;
    esac

    # default drivers
    if test "x$with_dri_drivers" = "xyes"; then
        with_dri_drivers="i915 i965 nouveau r200 radeon swrast"
    fi

    # Check for expat
    PKG_CHECK_MODULES([EXPAT], [expat], [],
        # expat version 2.0 and earlier do not provide expat.pc
        [AC_CHECK_HEADER([expat.h],[],
                         [AC_MSG_ERROR([Expat headers required for DRI not found])])
         AC_CHECK_LIB([expat],[XML_ParserCreate],[],
                     [AC_MSG_ERROR([Expat library required for DRI not found])])
         EXPAT_LIBS="-lexpat"])

    # put all the necessary libs together
    DRI_LIB_DEPS="$DRI_LIB_DEPS $SELINUX_LIBS $LIBDRM_LIBS $EXPAT_LIBS -lm $PTHREAD_LIBS $DLOPEN_LIBS"
fi

AC_SUBST([DRI_LIB_DEPS])

DRI_DIRS=''
dnl Duplicates in DRI_DIRS are removed by sorting it at the end of this block
if test -n "$with_dri_drivers"; then
    if test "x$enable_opengl" != xyes; then
        AC_MSG_ERROR([--with-dri-drivers requires OpenGL])
    fi

    dri_drivers=`IFS=', '; echo $with_dri_drivers`
    for driver in $dri_drivers; do
        DRI_DIRS="$DRI_DIRS $driver"
        case "x$driver" in
        xi915)
            HAVE_I915_DRI=yes;
            PKG_CHECK_MODULES([INTEL], [libdrm_intel >= $LIBDRM_INTEL_REQUIRED])
            ;;
        xi965)
            HAVE_I965_DRI=yes;
            PKG_CHECK_MODULES([INTEL], [libdrm_intel >= $LIBDRM_INTEL_REQUIRED])
            ;;
        xnouveau)
            HAVE_NOUVEAU_DRI=yes;
            PKG_CHECK_MODULES([NVVIEUX], [libdrm_nouveau >= $LIBDRM_NVVIEUX_REQUIRED])
            ;;
        xradeon)
            HAVE_RADEON_DRI=yes;
            PKG_CHECK_MODULES([RADEON], [libdrm_radeon >= $LIBDRM_RADEON_REQUIRED])
            ;;
        xr200)
            HAVE_R200_DRI=yes;
            PKG_CHECK_MODULES([RADEON], [libdrm_radeon >= $LIBDRM_RADEON_REQUIRED])
            ;;
        xswrast)
            HAVE_SWRAST_DRI=yes;
            ;;
        *)
            AC_MSG_ERROR([classic DRI driver '$driver' does not exist])
            ;;
        esac
    done
    DRI_DIRS=`echo $DRI_DIRS|tr " " "\n"|sort -u|tr "\n" " "`
fi

AM_CONDITIONAL(NEED_MEGADRIVER, test -n "$DRI_DIRS")
AM_CONDITIONAL(NEED_LIBMESA, test "x$enable_xlib_glx" = xyes -o \
                                  "x$enable_osmesa" = xyes -o \
                                  -n "$DRI_DIRS")

dnl
dnl OSMesa configuration
dnl

dnl Configure the channel bits for OSMesa (libOSMesa, libOSMesa16, ...)
AC_ARG_WITH([osmesa-bits],
    [AS_HELP_STRING([--with-osmesa-bits=BITS],
        [OSMesa channel bits and library name: 8, 16, 32 @<:@default=8@:>@])],
    [osmesa_bits="$withval"],
    [osmesa_bits=8])
if test "x$osmesa_bits" != x8; then
    if test "x$enable_dri" = xyes -o "x$enable_glx" = xyes; then
        AC_MSG_WARN([Ignoring OSMesa channel bits because of non-OSMesa driver])
        osmesa_bits=8
    fi
fi
case "x$osmesa_bits" in
x8)
    OSMESA_LIB="${OSMESA_LIB}"
    ;;
x16|x32)
    OSMESA_LIB="${OSMESA_LIB}$osmesa_bits"
    DEFINES="$DEFINES -DCHAN_BITS=$osmesa_bits -DDEFAULT_SOFTWARE_DEPTH_BITS=31"
    ;;
*)
    AC_MSG_ERROR([OSMesa bits '$osmesa_bits' is not a valid option])
    ;;
esac

if test "x$enable_osmesa" = xyes -o "x$enable_gallium_osmesa" = xyes; then
    # only link libraries with osmesa if shared
    if test "$enable_static" = no; then
        OSMESA_LIB_DEPS="-lm $PTHREAD_LIBS $SELINUX_LIBS $DLOPEN_LIBS"
    else
        OSMESA_LIB_DEPS=""
    fi
    OSMESA_PC_LIB_PRIV="-lm $PTHREAD_LIBS $SELINUX_LIBS $DLOPEN_LIBS"
fi

AC_SUBST([OSMESA_LIB_DEPS])
AC_SUBST([OSMESA_PC_REQ])
AC_SUBST([OSMESA_PC_LIB_PRIV])

dnl
dnl gbm configuration
dnl
if test "x$enable_gbm" = xauto; then
    case "$with_egl_platforms" in
        *drm*)
            enable_gbm=yes ;;
         *)
            enable_gbm=no ;;
    esac
fi
if test "x$enable_gbm" = xyes; then
    if test "x$need_pci_id$have_pci_id" = xyesno; then
        AC_MSG_ERROR([gbm requires udev >= $LIBUDEV_REQUIRED or sysfs])
    fi

    if test "x$enable_dri" = xyes; then
        if test "x$enable_shared_glapi" = xno; then
            AC_MSG_ERROR([gbm_dri requires --enable-shared-glapi])
        fi
    else
        # Strictly speaking libgbm does not require --enable-dri, although
        # both of its backends do. Thus one can build libgbm without any
        # backends if --disable-dri is set.
        # To avoid unnecessary complexity of checking if at least one backend
        # is available when building, just mandate --enable-dri.
        AC_MSG_ERROR([gbm requires --enable-dri])
    fi
fi
AM_CONDITIONAL(HAVE_GBM, test "x$enable_gbm" = xyes)
if test "x$need_pci_id$have_libudev" = xyesyes; then
    GBM_PC_REQ_PRIV="libudev >= $LIBUDEV_REQUIRED"
else
    GBM_PC_REQ_PRIV=""
fi
GBM_PC_LIB_PRIV="$DLOPEN_LIBS"
AC_SUBST([GBM_PC_REQ_PRIV])
AC_SUBST([GBM_PC_LIB_PRIV])

dnl
dnl EGL configuration
dnl
EGL_CLIENT_APIS=""

if test "x$enable_egl" = xyes; then
    EGL_LIB_DEPS="$DLOPEN_LIBS $SELINUX_LIBS $PTHREAD_LIBS"

    AC_CHECK_FUNC(mincore, [DEFINES="$DEFINES -DHAVE_MINCORE"])

    if test "$enable_static" != yes; then
        if test "x$enable_dri" = xyes; then
            HAVE_EGL_DRIVER_DRI2=1
            if test "x$enable_shared_glapi" = xno; then
                AC_MSG_ERROR([egl_dri2 requires --enable-shared-glapi])
            fi
            if test "x$enable_dri3" = xyes; then
                HAVE_EGL_DRIVER_DRI3=1
                if test "x$enable_shared_glapi" = xno; then
                    AC_MSG_ERROR([egl_dri3 requires --enable-shared-glapi])
                fi
            fi
        else
            # Avoid building an "empty" libEGL. Drop/update this
            # when other backends (haiku?) come along.
            AC_MSG_ERROR([egl requires --enable-dri])
        fi

    fi
fi
AM_CONDITIONAL(HAVE_EGL, test "x$enable_egl" = xyes)
AC_SUBST([EGL_LIB_DEPS])

gallium_st="mesa"

dnl
dnl XA configuration
dnl
if test "x$enable_xa" = xyes; then
    if test "x$with_gallium_drivers" = xswrast; then
       AC_MSG_ERROR([
          Building xa requires at least one non swrast gallium driver.
          If you are looking to use libxatracker.so with the VMware driver,
          make sure to include svga in the gallium drivers list, apart from
          enabling XA.
          Example: ./configure --enable-xa --with-gallium-drivers=svga...])
    fi
    gallium_st="$gallium_st xa"
fi
AM_CONDITIONAL(HAVE_ST_XA, test "x$enable_xa" = xyes)

dnl
dnl Gallium G3DVL configuration
dnl
if test -n "$with_gallium_drivers" -a "x$with_gallium_drivers" != xswrast; then
    if test "x$enable_xvmc" = xauto; then
	PKG_CHECK_EXISTS([xvmc >= $XVMC_REQUIRED], [enable_xvmc=yes], [enable_xvmc=no])
    fi

    if test "x$enable_vdpau" = xauto; then
	PKG_CHECK_EXISTS([vdpau >= $VDPAU_REQUIRED], [enable_vdpau=yes], [enable_vdpau=no])
    fi

    if test "x$enable_omx" = xauto; then
	PKG_CHECK_EXISTS([libomxil-bellagio >= $LIBOMXIL_BELLAGIO_REQUIRED], [enable_omx=yes], [enable_omx=no])
    fi

    if test "x$enable_va" = xauto; then
        PKG_CHECK_EXISTS([libva >= $LIBVA_REQUIRED], [enable_va=yes], [enable_va=no])
    fi
fi

if test "x$enable_dri" = xyes -o \
        "x$enable_xvmc" = xyes -o \
        "x$enable_vdpau" = xyes -o \
        "x$enable_omx" = xyes -o \
        "x$enable_va" = xyes; then
    need_gallium_vl=yes
fi
AM_CONDITIONAL(NEED_GALLIUM_VL, test "x$need_gallium_vl" = xyes)

if test "x$enable_xvmc" = xyes -o \
        "x$enable_vdpau" = xyes -o \
        "x$enable_omx" = xyes -o \
        "x$enable_va" = xyes; then
    PKG_CHECK_MODULES([VL], [x11-xcb xcb xcb-dri2 >= $XCBDRI2_REQUIRED])
    need_gallium_vl_winsys=yes
fi
AM_CONDITIONAL(NEED_GALLIUM_VL_WINSYS, test "x$need_gallium_vl_winsys" = xyes)

if test "x$enable_xvmc" = xyes; then
    PKG_CHECK_MODULES([XVMC], [xvmc >= $XVMC_REQUIRED])
    gallium_st="$gallium_st xvmc"
fi
AM_CONDITIONAL(HAVE_ST_XVMC, test "x$enable_xvmc" = xyes)

if test "x$enable_vdpau" = xyes; then
    PKG_CHECK_MODULES([VDPAU], [vdpau >= $VDPAU_REQUIRED])
    gallium_st="$gallium_st vdpau"
    DEFINES="$DEFINES -DHAVE_ST_VDPAU"
fi
AM_CONDITIONAL(HAVE_ST_VDPAU, test "x$enable_vdpau" = xyes)

if test "x$enable_omx" = xyes; then
    PKG_CHECK_MODULES([OMX], [libomxil-bellagio >= $LIBOMXIL_BELLAGIO_REQUIRED])
    gallium_st="$gallium_st omx"
fi
AM_CONDITIONAL(HAVE_ST_OMX, test "x$enable_omx" = xyes)

if test "x$enable_va" = xyes; then
    PKG_CHECK_MODULES([VA], [libva >= $LIBVA_REQUIRED])
    gallium_st="$gallium_st va"
fi
AM_CONDITIONAL(HAVE_ST_VA, test "x$enable_va" = xyes)

dnl
dnl Nine Direct3D9 configuration
dnl
if test "x$enable_nine" = xyes; then
    if ! echo "$with_gallium_drivers" | grep -q 'swrast'; then
        AC_MSG_ERROR([nine requires the gallium swrast driver])
    fi
    if test "x$with_gallium_drivers" = xswrast; then
        AC_MSG_ERROR([nine requires at least one non-swrast gallium driver])
    fi
    if test $GCC_VERSION_MAJOR -lt 4 -o $GCC_VERSION_MAJOR -eq 4 -a $GCC_VERSION_MINOR -lt 6; then
        AC_MSG_ERROR([gcc >= 4.6 is required to build nine])
    fi

    if test "x$enable_dri3" = xno; then
        AC_MSG_WARN([using nine together with wine requires DRI3 enabled system])
    fi

    gallium_st="$gallium_st nine"
fi
AM_CONDITIONAL(HAVE_ST_NINE, test "x$enable_nine" = xyes)

dnl
dnl OpenCL configuration
dnl

AC_ARG_WITH([clang-libdir],
   [AS_HELP_STRING([--with-clang-libdir],
         [Path to Clang libraries @<:@default=llvm-config --libdir@:>@])],
   [CLANG_LIBDIR="$withval"],
   [CLANG_LIBDIR=''])

PKG_CHECK_EXISTS([libclc], [have_libclc=yes], [have_libclc=no])
PKG_CHECK_MODULES([LIBELF], [libelf], [have_libelf=yes], [have_libelf=no])

if test "x$have_libelf" = xno; then
   LIBELF_LIBS=''
   LIBELF_CFLAGS=''
   AC_CHECK_LIB([elf], [elf_memory], [have_libelf=yes;LIBELF_LIBS=-lelf], [have_libelf=no])
   AC_SUBST([LIBELF_LIBS])
   AC_SUBST([LIBELF_CFLAGS])
fi

if test "x$enable_opencl" = xyes; then
    if test -z "$with_gallium_drivers"; then
        AC_MSG_ERROR([cannot enable OpenCL without Gallium])
    fi

    if test $GCC_VERSION_MAJOR -lt 4 -o $GCC_VERSION_MAJOR -eq 4 -a $GCC_VERSION_MINOR -lt 7; then
        AC_MSG_ERROR([gcc >= 4.7 is required to build clover])
    fi

    if test "x$have_libclc" = xno; then
        AC_MSG_ERROR([pkg-config cannot find libclc.pc which is required to build clover.
                    Make sure the directory containing libclc.pc is specified in your
                    PKG_CONFIG_PATH environment variable.
                    By default libclc.pc is installed to /usr/local/share/pkgconfig/])
    else
        LIBCLC_INCLUDEDIR=`$PKG_CONFIG --variable=includedir libclc`
        LIBCLC_LIBEXECDIR=`$PKG_CONFIG --variable=libexecdir libclc`
        AC_SUBST([LIBCLC_INCLUDEDIR])
        AC_SUBST([LIBCLC_LIBEXECDIR])
    fi

    gallium_st="$gallium_st clover"

    if test "x$enable_opencl_icd" = xyes; then
        OPENCL_LIBNAME="MesaOpenCL"
    else
        OPENCL_LIBNAME="OpenCL"
    fi

    if test "x$have_libelf" != xyes; then
       AC_MSG_ERROR([Clover requires libelf])
    fi
fi
AM_CONDITIONAL(HAVE_CLOVER, test "x$enable_opencl" = xyes)
AM_CONDITIONAL(HAVE_CLOVER_ICD, test "x$enable_opencl_icd" = xyes)
AC_SUBST([OPENCL_LIBNAME])

dnl
dnl Gallium configuration
dnl
AM_CONDITIONAL(HAVE_GALLIUM, test -n "$with_gallium_drivers")

AC_SUBST([LLVM_BINDIR])
AC_SUBST([LLVM_CFLAGS])
AC_SUBST([LLVM_CPPFLAGS])
AC_SUBST([LLVM_CXXFLAGS])
AC_SUBST([LLVM_LIBDIR])
AC_SUBST([LLVM_LIBS])
AC_SUBST([LLVM_LDFLAGS])
AC_SUBST([LLVM_INCLUDEDIR])
AC_SUBST([LLVM_VERSION])
AC_SUBST([CLANG_RESOURCE_DIR])

case "x$enable_opengl$enable_gles1$enable_gles2" in
x*yes*)
    EGL_CLIENT_APIS="$EGL_CLIENT_APIS "'$(GL_LIB)'
    ;;
esac

AC_SUBST([VG_LIB_DEPS])
AC_SUBST([EGL_CLIENT_APIS])

dnl
dnl EGL Platforms configuration
dnl
AC_ARG_WITH([egl-platforms],
    [AS_HELP_STRING([--with-egl-platforms@<:@=DIRS...@:>@],
        [comma delimited native platforms libEGL supports, e.g.
        "x11,drm" @<:@default=auto@:>@])],
    [with_egl_platforms="$withval"],
    [if test "x$enable_egl" = xyes; then
	with_egl_platforms="x11"
    else
	with_egl_platforms=""
    fi])

if test "x$with_egl_platforms" != "x" -a "x$enable_egl" != xyes; then
    AC_MSG_ERROR([cannot build egl state tracker without EGL library])
fi

PKG_CHECK_MODULES([WAYLAND_SCANNER], [wayland_scanner],
        WAYLAND_SCANNER=`$PKG_CONFIG --variable=wayland_scanner wayland_scanner`,
        WAYLAND_SCANNER='')
if test "x$WAYLAND_SCANNER" = x; then
    AC_PATH_PROG([WAYLAND_SCANNER], [wayland-scanner])
fi

# Do per-EGL platform setups and checks
egl_platforms=`IFS=', '; echo $with_egl_platforms`
for plat in $egl_platforms; do
	case "$plat" in
	wayland)
		test "x$have_libdrm" != xyes &&
			AC_MSG_ERROR([EGL platform wayland requires libdrm >= $LIBDRM_REQUIRED])

		PKG_CHECK_MODULES([WAYLAND], [wayland-client >= $WAYLAND_REQUIRED wayland-server >= $WAYLAND_REQUIRED])

		if test "x$WAYLAND_SCANNER" = x; then
			AC_MSG_ERROR([wayland-scanner is needed to compile the wayland egl platform])
		fi
		;;

	x11)
		PKG_CHECK_MODULES([XCB_DRI2], [x11-xcb xcb xcb-dri2 >= $XCBDRI2_REQUIRED xcb-xfixes])
		;;

	drm)
		test "x$enable_gbm" = "xno" &&
			AC_MSG_ERROR([EGL platform drm needs gbm])
		test "x$have_libdrm" != xyes &&
			AC_MSG_ERROR([EGL platform drm requires libdrm >= $LIBDRM_REQUIRED])
		;;

	surfaceless)
		test "x$have_libdrm" != xyes &&
			AC_MSG_ERROR([EGL platform surfaceless requires libdrm >= $LIBDRM_REQUIRED])
		;;

	*)
		AC_MSG_ERROR([EGL platform '$plat' does not exist])
		;;
	esac

        case "$plat$need_pci_id$have_pci_id" in
                waylandyesno|drmyesno)
                    AC_MSG_ERROR([cannot build $plat platform without udev >= $LIBUDEV_REQUIRED or sysfs]) ;;
        esac
done

# libEGL wants to default to the first platform specified in
# ./configure.  parse that here.
if test "x$egl_platforms" != "x"; then
    FIRST_PLATFORM_CAPS=`echo $egl_platforms | sed 's| .*||' | tr '[[a-z]]' '[[A-Z]]'`
    EGL_NATIVE_PLATFORM="_EGL_PLATFORM_$FIRST_PLATFORM_CAPS"
else
    EGL_NATIVE_PLATFORM="_EGL_INVALID_PLATFORM"
fi

AM_CONDITIONAL(HAVE_EGL_PLATFORM_X11, echo "$egl_platforms" | grep -q 'x11')
AM_CONDITIONAL(HAVE_EGL_PLATFORM_WAYLAND, echo "$egl_platforms" | grep -q 'wayland')
AM_CONDITIONAL(HAVE_EGL_PLATFORM_DRM, echo "$egl_platforms" | grep -q 'drm')
AM_CONDITIONAL(HAVE_EGL_PLATFORM_SURFACELESS, echo "$egl_platforms" | grep -q 'surfaceless')
AM_CONDITIONAL(HAVE_EGL_PLATFORM_NULL, echo "$egl_platforms" | grep -q 'null')

AM_CONDITIONAL(HAVE_EGL_DRIVER_DRI2, test "x$HAVE_EGL_DRIVER_DRI2" != "x")

AC_SUBST([EGL_NATIVE_PLATFORM])
AC_SUBST([EGL_CFLAGS])

# If we don't have the X11 platform, set this define so we don't try to include
# the X11 headers.
if ! echo "$egl_platforms" | grep -q 'x11'; then
    DEFINES="$DEFINES -DMESA_EGL_NO_X11_HEADERS"
    GL_PC_CFLAGS="$GL_PC_CFLAGS -DMESA_EGL_NO_X11_HEADERS"
fi

dnl
dnl Gallium LLVM
dnl
AC_ARG_ENABLE([gallium-llvm],
    [AS_HELP_STRING([--enable-gallium-llvm],
        [build gallium LLVM support @<:@default=enabled on x86/x86_64@:>@])],
    [enable_gallium_llvm="$enableval"],
    [enable_gallium_llvm=auto])

AC_ARG_ENABLE([llvm-shared-libs],
    [AS_HELP_STRING([--enable-llvm-shared-libs],
        [link with LLVM shared libraries @<:@default=enabled@:>@])],
    [enable_llvm_shared_libs="$enableval"],
    [enable_llvm_shared_libs=yes])

AC_ARG_WITH([llvm-prefix],
    [AS_HELP_STRING([--with-llvm-prefix],
        [Prefix for LLVM installations in non-standard locations])],
    [llvm_prefix="$withval"],
    [llvm_prefix=''])


# Call this inside ` ` to get the return value.
# $1 is the llvm-config command with arguments.
strip_unwanted_llvm_flags() {
    # Use \> (marks the end of the word)
    echo `$1` | sed \
	-e 's/-DNDEBUG\>//g' \
	-e 's/-D_GNU_SOURCE\>//g' \
	-e 's/-pedantic\>//g' \
	-e 's/-Wcovered-switch-default\>//g' \
	-e 's/-O.\>//g' \
	-e 's/-g\>//g' \
	-e 's/-Wall\>//g' \
	-e 's/-Wcast-qual\>//g' \
	-e 's/-Woverloaded-virtual\>//g' \
	-e 's/-fcolor-diagnostics\>//g' \
	-e 's/-fdata-sections\>//g' \
	-e 's/-ffunction-sections\>//g' \
	-e 's/-fno-exceptions\>//g' \
	-e 's/-fomit-frame-pointer\>//g' \
	-e 's/-fvisibility-inlines-hidden\>//g' \
	-e 's/-fPIC\>//g' \
	-e 's/-fstack-protector-strong\>//g'
}

llvm_check_version_for() {
    if test "${LLVM_VERSION_INT}${LLVM_VERSION_PATCH}" -lt "${1}0${2}${3}"; then
        AC_MSG_ERROR([LLVM $1.$2.$3 or newer is required for $4])
    fi
}



if test -z "$with_gallium_drivers"; then
    enable_gallium_llvm=no
fi
if test "x$enable_gallium_llvm" = xauto; then
    case "$host_cpu" in
    i*86|x86_64|amd64) enable_gallium_llvm=yes;;
    esac
fi
if test "x$enable_gallium_llvm" = xyes; then
    if test -n "$llvm_prefix"; then
        AC_PATH_TOOL([LLVM_CONFIG], [llvm-config], [no], ["$llvm_prefix/bin"])
    else
        AC_PATH_TOOL([LLVM_CONFIG], [llvm-config], [no])
    fi

    if test "x$LLVM_CONFIG" != xno; then
        LLVM_VERSION=`$LLVM_CONFIG --version | egrep -o '^[[0-9.]]+'`
        LLVM_LDFLAGS=`$LLVM_CONFIG --ldflags`
        LLVM_BINDIR=`$LLVM_CONFIG --bindir`
        LLVM_CPPFLAGS=`strip_unwanted_llvm_flags "$LLVM_CONFIG --cppflags"`
        LLVM_CFLAGS=$LLVM_CPPFLAGS   # CPPFLAGS seem to be sufficient
        LLVM_CXXFLAGS=`strip_unwanted_llvm_flags "$LLVM_CONFIG --cxxflags"`
        LLVM_INCLUDEDIR=`$LLVM_CONFIG --includedir`
        LLVM_LIBDIR=`$LLVM_CONFIG --libdir`

        AC_COMPUTE_INT([LLVM_VERSION_MAJOR], [LLVM_VERSION_MAJOR],
            [#include "${LLVM_INCLUDEDIR}/llvm/Config/llvm-config.h"])
        AC_COMPUTE_INT([LLVM_VERSION_MINOR], [LLVM_VERSION_MINOR],
            [#include "${LLVM_INCLUDEDIR}/llvm/Config/llvm-config.h"])

        LLVM_VERSION_PATCH=`echo $LLVM_VERSION | cut -d. -f3 | egrep -o '^[[0-9]]+'`
        if test -z "$LLVM_VERSION_PATCH"; then
            LLVM_VERSION_PATCH=0
        fi

        if test -n "${LLVM_VERSION_MAJOR}"; then
            LLVM_VERSION_INT="${LLVM_VERSION_MAJOR}0${LLVM_VERSION_MINOR}"
        else
            LLVM_VERSION_INT=`echo $LLVM_VERSION | sed -e 's/\([[0-9]]\)\.\([[0-9]]\)/\10\2/g'`
        fi

        LLVM_REQUIRED_VERSION_MAJOR="3"
        LLVM_REQUIRED_VERSION_MINOR="3"
        if test "$LLVM_VERSION_INT" -lt "${LLVM_REQUIRED_VERSION_MAJOR}0${LLVM_REQUIRED_VERSION_MINOR}"; then
            AC_MSG_ERROR([LLVM $LLVM_REQUIRED_VERSION_MAJOR.$LLVM_REQUIRED_VERSION_MINOR or newer is required])
        fi

        LLVM_COMPONENTS="engine bitwriter mcjit mcdisassembler"

        if test "x$enable_opencl" = xyes; then
            llvm_check_version_for "3" "5" "0" "opencl"

            LLVM_COMPONENTS="${LLVM_COMPONENTS} all-targets ipo linker instrumentation"
            LLVM_COMPONENTS="${LLVM_COMPONENTS} irreader option objcarcopts profiledata"
        fi
        DEFINES="${DEFINES} -DHAVE_LLVM=0x0$LLVM_VERSION_INT -DMESA_LLVM_VERSION_PATCH=$LLVM_VERSION_PATCH"
        MESA_LLVM=1

        dnl Check for Clang internal headers
        if test "x$enable_opencl" = xyes; then
            if test -z "$CLANG_LIBDIR"; then
                CLANG_LIBDIR=${LLVM_LIBDIR}
            fi
            CLANG_RESOURCE_DIR=$CLANG_LIBDIR/clang/${LLVM_VERSION}
            AS_IF([test ! -f "$CLANG_RESOURCE_DIR/include/stddef.h"],
                [AC_MSG_ERROR([Could not find clang internal header stddef.h in $CLANG_RESOURCE_DIR Use --with-clang-libdir to specify the correct path to the clang libraries.])])
        fi
    else
        MESA_LLVM=0
        LLVM_VERSION_INT=0
    fi
else
    MESA_LLVM=0
    LLVM_VERSION_INT=0

    if test "x$enable_opencl" = xyes; then
        AC_MSG_ERROR([cannot enable OpenCL without LLVM])
    fi
fi

dnl Directory for XVMC libs
AC_ARG_WITH([xvmc-libdir],
    [AS_HELP_STRING([--with-xvmc-libdir=DIR],
        [directory for the XVMC libraries @<:@default=${libdir}@:>@])],
    [XVMC_LIB_INSTALL_DIR="$withval"],
    [XVMC_LIB_INSTALL_DIR='${libdir}'])
AC_SUBST([XVMC_LIB_INSTALL_DIR])

dnl
dnl Gallium Tests
dnl
AM_CONDITIONAL(HAVE_GALLIUM_TESTS, test "x$enable_gallium_tests" = xyes)

dnl Directory for VDPAU libs
AC_ARG_WITH([vdpau-libdir],
    [AS_HELP_STRING([--with-vdpau-libdir=DIR],
        [directory for the VDPAU libraries @<:@default=${libdir}/vdpau@:>@])],
    [VDPAU_LIB_INSTALL_DIR="$withval"],
    [VDPAU_LIB_INSTALL_DIR='${libdir}/vdpau'])
AC_SUBST([VDPAU_LIB_INSTALL_DIR])

dnl Directory for OMX libs

AC_ARG_WITH([omx-libdir],
    [AS_HELP_STRING([--with-omx-libdir=DIR],
        [directory for the OMX libraries])],
    [OMX_LIB_INSTALL_DIR="$withval"],
    [OMX_LIB_INSTALL_DIR=`$PKG_CONFIG --define-variable=libdir=\$libdir --variable=pluginsdir libomxil-bellagio`])
AC_SUBST([OMX_LIB_INSTALL_DIR])

dnl Directory for VA libs

AC_ARG_WITH([va-libdir],
    [AS_HELP_STRING([--with-va-libdir=DIR],
        [directory for the VA libraries @<:@${libdir}/dri@:>@])],
    [VA_LIB_INSTALL_DIR="$withval"],
    [VA_LIB_INSTALL_DIR="${libdir}/dri"])
AC_SUBST([VA_LIB_INSTALL_DIR])

AC_ARG_WITH([d3d-libdir],
    [AS_HELP_STRING([--with-d3d-libdir=DIR],
        [directory for the D3D modules @<:@${libdir}/d3d@:>@])],
    [D3D_DRIVER_INSTALL_DIR="$withval"],
    [D3D_DRIVER_INSTALL_DIR="${libdir}/d3d"])
AC_SUBST([D3D_DRIVER_INSTALL_DIR])

dnl
dnl Gallium helper functions
dnl
gallium_require_drm() {
    if test "x$have_libdrm" != xyes; then
       AC_MSG_ERROR([$1 requires libdrm >= $LIBDRM_REQUIRED])
    fi
}

gallium_require_llvm() {
    if test "x$MESA_LLVM" = x0; then
        case "$host" in *gnux32) return;; esac
        case "$host_cpu" in
        i*86|x86_64|amd64) AC_MSG_ERROR([LLVM is required to build $1 on x86 and x86_64]);;
        esac
    fi
}

gallium_require_drm_loader() {
    if test "x$need_pci_id$have_pci_id" = xyesno; then
        AC_MSG_ERROR([Gallium drm loader requires libudev >= $LIBUDEV_REQUIRED or sysfs])
    fi
}

dnl This is for Glamor. Skip this if OpenGL is disabled.
require_egl_drm() {
    if test "x$enable_opengl" = xno; then
        return 0
    fi

    case "$with_egl_platforms" in
        *drm*)
            ;;
         *)
            AC_MSG_ERROR([--with-egl-platforms=drm is required to build the $1 driver.])
            ;;
    esac
    if test "x$enable_gbm" != xyes; then
            AC_MSG_ERROR([--enable-gbm is required to build the $1 driver.])
    fi
}

radeon_llvm_check() {
    if test ${LLVM_VERSION_INT} -lt 307; then
        amdgpu_llvm_target_name='r600'
    else
        amdgpu_llvm_target_name='amdgpu'
    fi
    if test "x$enable_gallium_llvm" != "xyes"; then
        AC_MSG_ERROR([--enable-gallium-llvm is required when building $1])
    fi
    llvm_check_version_for "3" "6" "0" $1
    if test true && $LLVM_CONFIG --targets-built | grep -iqvw $amdgpu_llvm_target_name ; then
        AC_MSG_ERROR([LLVM $amdgpu_llvm_target_name not enabled in your LLVM build.])
    fi
    LLVM_COMPONENTS="${LLVM_COMPONENTS} $amdgpu_llvm_target_name bitreader ipo"
    NEED_RADEON_LLVM=yes
    if test "x$have_libelf" != xyes; then
       AC_MSG_ERROR([$1 requires libelf when using llvm])
    fi
}

swr_llvm_check() {
    gallium_require_llvm $1
    if test ${LLVM_VERSION_INT} -lt 306; then
        AC_MSG_ERROR([LLVM version 3.6 or later required when building $1])
    fi
    if test "x$enable_gallium_llvm" != "xyes"; then
        AC_MSG_ERROR([--enable-gallium-llvm is required when building $1])
    fi
}

dnl Duplicates in GALLIUM_DRIVERS_DIRS are removed by sorting it after this block
if test -n "$with_gallium_drivers"; then
    gallium_drivers=`IFS=', '; echo $with_gallium_drivers`
    for driver in $gallium_drivers; do
        case "x$driver" in
        xsvga)
            HAVE_GALLIUM_SVGA=yes
            gallium_require_drm "svga"
            gallium_require_drm_loader
            ;;
        xi915)
            HAVE_GALLIUM_I915=yes
            PKG_CHECK_MODULES([INTEL], [libdrm_intel >= $LIBDRM_INTEL_REQUIRED])
            gallium_require_drm "Gallium i915"
            gallium_require_drm_loader
            ;;
        xilo)
            HAVE_GALLIUM_ILO=yes
            PKG_CHECK_MODULES([INTEL], [libdrm_intel >= $LIBDRM_INTEL_REQUIRED])
            gallium_require_drm "Gallium i965/ilo"
            gallium_require_drm_loader
            ;;
        xr300)
            HAVE_GALLIUM_R300=yes
            PKG_CHECK_MODULES([RADEON], [libdrm_radeon >= $LIBDRM_RADEON_REQUIRED])
            gallium_require_drm "Gallium R300"
            gallium_require_drm_loader
            gallium_require_llvm "Gallium R300"
            ;;
        xr600)
            HAVE_GALLIUM_R600=yes
            PKG_CHECK_MODULES([RADEON], [libdrm_radeon >= $LIBDRM_RADEON_REQUIRED])
            gallium_require_drm "Gallium R600"
            gallium_require_drm_loader
            if test "x$enable_opencl" = xyes; then
                radeon_llvm_check "r600g"
                LLVM_COMPONENTS="${LLVM_COMPONENTS} bitreader asmparser"
            fi
            ;;
        xradeonsi)
            HAVE_GALLIUM_RADEONSI=yes
            PKG_CHECK_MODULES([RADEON], [libdrm_radeon >= $LIBDRM_RADEON_REQUIRED])
            PKG_CHECK_MODULES([AMDGPU], [libdrm_amdgpu >= $LIBDRM_AMDGPU_REQUIRED])
            gallium_require_drm "radeonsi"
            gallium_require_drm_loader
            radeon_llvm_check "radeonsi"
            require_egl_drm "radeonsi"
            ;;
        xnouveau)
            HAVE_GALLIUM_NOUVEAU=yes
            PKG_CHECK_MODULES([NOUVEAU], [libdrm_nouveau >= $LIBDRM_NOUVEAU_REQUIRED])
            gallium_require_drm "nouveau"
            gallium_require_drm_loader
            ;;
        xfreedreno)
            HAVE_GALLIUM_FREEDRENO=yes
            PKG_CHECK_MODULES([FREEDRENO], [libdrm_freedreno >= $LIBDRM_FREEDRENO_REQUIRED])
            gallium_require_drm "freedreno"
            gallium_require_drm_loader
            ;;
        xswrast)
            HAVE_GALLIUM_SOFTPIPE=yes
            if test "x$MESA_LLVM" = x1; then
                HAVE_GALLIUM_LLVMPIPE=yes
            fi
            ;;
        xswr)
            AX_CXX_COMPILE_STDCXX([11], [noext], [mandatory])
            swr_llvm_check "swr"

            AC_MSG_CHECKING([whether $CXX supports AVX/AVX2])
            AVX_CXXFLAGS="-march=core-avx-i"
            AVX2_CXXFLAGS="-march=core-avx2"

            AC_LANG_PUSH([C++])
            save_CXXFLAGS="$CXXFLAGS"
            CXXFLAGS="$AVX_CXXFLAGS $CXXFLAGS"
            AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],[],
                              [AC_MSG_ERROR([AVX compiler support not detected])])
            CXXFLAGS="$save_CXXFLAGS"

            save_CFLAGS="$CXXFLAGS"
            CXXFLAGS="$AVX2_CXXFLAGS $CXXFLAGS"
            AC_COMPILE_IFELSE([AC_LANG_PROGRAM()],[],
                              [AC_MSG_ERROR([AVX2 compiler support not detected])])
            CXXFLAGS="$save_CXXFLAGS"
            AC_LANG_POP([C++])

            HAVE_GALLIUM_SWR=yes
            ;;
        xvc4)
            HAVE_GALLIUM_VC4=yes
            gallium_require_drm "vc4"
            gallium_require_drm_loader

            PKG_CHECK_MODULES([SIMPENROSE], [simpenrose],
                              [USE_VC4_SIMULATOR=yes;
                               DEFINES="$DEFINES -DUSE_VC4_SIMULATOR"],
                              [USE_VC4_SIMULATOR=no])
            ;;
        xvirgl)
            HAVE_GALLIUM_VIRGL=yes
            gallium_require_drm "virgl"
            gallium_require_drm_loader
            require_egl_drm "virgl"
            ;;
        *)
            AC_MSG_ERROR([Unknown Gallium driver: $driver])
            ;;
        esac
    done
fi

dnl Set LLVM_LIBS - This is done after the driver configuration so
dnl that drivers can add additional components to LLVM_COMPONENTS.
dnl Previously, gallium drivers were updating LLVM_LIBS directly
dnl by calling llvm-config --libs ${DRIVER_LLVM_COMPONENTS}, but
dnl this was causing the same libraries to be appear multiple times
dnl in LLVM_LIBS.

if test "x$MESA_LLVM" != x0; then

    if ! $LLVM_CONFIG --libs ${LLVM_COMPONENTS} >/dev/null; then
       AC_MSG_ERROR([Calling ${LLVM_CONFIG} failed])
    fi
    LLVM_LIBS="`$LLVM_CONFIG --libs ${LLVM_COMPONENTS}`"

    dnl llvm-config may not give the right answer when llvm is a built as a
    dnl single shared library, so we must work the library name out for
    dnl ourselves.
    dnl (See https://llvm.org/bugs/show_bug.cgi?id=6823)
    if test "x$enable_llvm_shared_libs" = xyes; then
        dnl We can't use $LLVM_VERSION because it has 'svn' stripped out,
        LLVM_SO_NAME=LLVM-`$LLVM_CONFIG --version`
        AS_IF([test -f "$LLVM_LIBDIR/lib$LLVM_SO_NAME.$IMP_LIB_EXT"], [llvm_have_one_so=yes])

        if test "x$llvm_have_one_so" = xyes; then
            dnl LLVM was built using auto*, so there is only one shared object.
            LLVM_LIBS="-l$LLVM_SO_NAME"
        else
            dnl If LLVM was built with CMake, there will be one shared object per
            dnl component.
            AS_IF([test ! -f "$LLVM_LIBDIR/libLLVMTarget.$IMP_LIB_EXT"],
                    [AC_MSG_ERROR([Could not find llvm shared libraries:
	Please make sure you have built llvm with the --enable-shared option
	and that your llvm libraries are installed in $LLVM_LIBDIR
	If you have installed your llvm libraries to a different directory you
	can use the --with-llvm-prefix= configure flag to specify this directory.
	NOTE: Mesa is attempting to use llvm shared libraries by default.
	If you do not want to build with llvm shared libraries and instead want to
	use llvm static libraries then add --disable-llvm-shared-libs to your configure
	invocation and rebuild.])])

           dnl We don't need to update LLVM_LIBS in this case because the LLVM
           dnl install uses a shared object for each component and we have
           dnl already added all of these objects to LLVM_LIBS.
        fi
    else
        AC_MSG_WARN([Building mesa with statically linked LLVM may cause compilation issues])
        dnl We need to link to llvm system libs when using static libs
        dnl However, only llvm 3.5+ provides --system-libs
        if test $LLVM_VERSION_MAJOR -eq 3 -a $LLVM_VERSION_MINOR -ge 5; then
            LLVM_LIBS="$LLVM_LIBS `$LLVM_CONFIG --system-libs`"
        fi
    fi
fi

AM_CONDITIONAL(HAVE_GALLIUM_SVGA, test "x$HAVE_GALLIUM_SVGA" = xyes)
AM_CONDITIONAL(HAVE_GALLIUM_I915, test "x$HAVE_GALLIUM_I915" = xyes)
AM_CONDITIONAL(HAVE_GALLIUM_ILO, test "x$HAVE_GALLIUM_ILO" = xyes)
AM_CONDITIONAL(HAVE_GALLIUM_R300, test "x$HAVE_GALLIUM_R300" = xyes)
AM_CONDITIONAL(HAVE_GALLIUM_R600, test "x$HAVE_GALLIUM_R600" = xyes)
AM_CONDITIONAL(HAVE_GALLIUM_RADEONSI, test "x$HAVE_GALLIUM_RADEONSI" = xyes)
AM_CONDITIONAL(HAVE_GALLIUM_RADEON_COMMON, test "x$HAVE_GALLIUM_R600" = xyes -o \
                                                "x$HAVE_GALLIUM_RADEONSI" = xyes)
AM_CONDITIONAL(HAVE_GALLIUM_NOUVEAU, test "x$HAVE_GALLIUM_NOUVEAU" = xyes)
AM_CONDITIONAL(HAVE_GALLIUM_FREEDRENO, test "x$HAVE_GALLIUM_FREEDRENO" = xyes)
AM_CONDITIONAL(HAVE_GALLIUM_SOFTPIPE, test "x$HAVE_GALLIUM_SOFTPIPE" = xyes)
AM_CONDITIONAL(HAVE_GALLIUM_LLVMPIPE, test "x$HAVE_GALLIUM_LLVMPIPE" = xyes)
AM_CONDITIONAL(HAVE_GALLIUM_SWR, test "x$HAVE_GALLIUM_SWR" = xyes)
AM_CONDITIONAL(HAVE_GALLIUM_SWRAST, test "x$HAVE_GALLIUM_SOFTPIPE" = xyes -o \
                                         "x$HAVE_GALLIUM_LLVMPIPE" = xyes -o \
                                         "x$HAVE_GALLIUM_SWR" = xyes)
AM_CONDITIONAL(HAVE_GALLIUM_VC4, test "x$HAVE_GALLIUM_VC4" = xyes)
AM_CONDITIONAL(HAVE_GALLIUM_VIRGL, test "x$HAVE_GALLIUM_VIRGL" = xyes)

AM_CONDITIONAL(HAVE_GALLIUM_STATIC_TARGETS, test "x$enable_shared_pipe_drivers" = xno)

if test "x$enable_dri" = xyes; then
    GALLIUM_PIPE_LOADER_DEFINES="$GALLIUM_PIPE_LOADER_DEFINES -DHAVE_PIPE_LOADER_DRI"
fi

if test "x$have_drisw_kms" = xyes; then
    GALLIUM_PIPE_LOADER_DEFINES="$GALLIUM_PIPE_LOADER_DEFINES -DHAVE_PIPE_LOADER_KMS"
fi
AC_SUBST([GALLIUM_PIPE_LOADER_DEFINES])

AM_CONDITIONAL(HAVE_I915_DRI, test x$HAVE_I915_DRI = xyes)
AM_CONDITIONAL(HAVE_I965_DRI, test x$HAVE_I965_DRI = xyes)
AM_CONDITIONAL(HAVE_NOUVEAU_DRI, test x$HAVE_NOUVEAU_DRI = xyes)
AM_CONDITIONAL(HAVE_R200_DRI, test x$HAVE_R200_DRI = xyes)
AM_CONDITIONAL(HAVE_RADEON_DRI, test x$HAVE_RADEON_DRI = xyes)
AM_CONDITIONAL(HAVE_SWRAST_DRI, test x$HAVE_SWRAST_DRI = xyes)

AM_CONDITIONAL(NEED_RADEON_DRM_WINSYS, test "x$HAVE_GALLIUM_R300" = xyes -o \
                                            "x$HAVE_GALLIUM_R600" = xyes -o \
                                            "x$HAVE_GALLIUM_RADEONSI" = xyes)
AM_CONDITIONAL(NEED_WINSYS_XLIB, test "x$NEED_WINSYS_XLIB" = xyes)
AM_CONDITIONAL(NEED_RADEON_LLVM, test x$NEED_RADEON_LLVM = xyes)
AM_CONDITIONAL(HAVE_GALLIUM_COMPUTE, test x$enable_opencl = xyes)
AM_CONDITIONAL(HAVE_MESA_LLVM, test x$MESA_LLVM = x1)
AM_CONDITIONAL(USE_VC4_SIMULATOR, test x$USE_VC4_SIMULATOR = xyes)
if test "x$USE_VC4_SIMULATOR" = xyes -a "x$HAVE_GALLIUM_ILO" = xyes; then
    AC_MSG_ERROR([VC4 simulator on x86 replaces i965 driver build, so ilo must be disabled.])
fi

AM_CONDITIONAL(HAVE_LIBDRM, test "x$have_libdrm" = xyes)
AM_CONDITIONAL(HAVE_X11_DRIVER, test "x$enable_xlib_glx" = xyes)
AM_CONDITIONAL(HAVE_OSMESA, test "x$enable_osmesa" = xyes)
AM_CONDITIONAL(HAVE_GALLIUM_OSMESA, test "x$enable_gallium_osmesa" = xyes)

AM_CONDITIONAL(HAVE_X86_ASM, test "x$asm_arch" = xx86 -o "x$asm_arch" = xx86_64)
AM_CONDITIONAL(HAVE_X86_64_ASM, test "x$asm_arch" = xx86_64)
AM_CONDITIONAL(HAVE_SPARC_ASM, test "x$asm_arch" = xsparc)

AC_SUBST([NINE_MAJOR], 1)
AC_SUBST([NINE_MINOR], 0)
AC_SUBST([NINE_TINY], 0)
AC_SUBST([NINE_VERSION], "$NINE_MAJOR.$NINE_MINOR.$NINE_TINY")

AC_SUBST([VDPAU_MAJOR], 1)
AC_SUBST([VDPAU_MINOR], 0)

VA_MAJOR=`$PKG_CONFIG --modversion libva | $SED -n 's/\([[^\.]]*\)\..*$/\1/p'`
VA_MINOR=`$PKG_CONFIG --modversion libva | $SED -n 's/.*\.\(.*\)\..*$/\1/p'`
AC_SUBST([VA_MAJOR], $VA_MAJOR)
AC_SUBST([VA_MINOR], $VA_MINOR)

AC_SUBST([XVMC_MAJOR], 1)
AC_SUBST([XVMC_MINOR], 0)

XA_HEADER="$srcdir/src/gallium/state_trackers/xa/xa_tracker.h"
XA_MAJOR=`grep "#define XA_TRACKER_VERSION_MAJOR" $XA_HEADER | $SED 's/^#define XA_TRACKER_VERSION_MAJOR //'`
XA_MINOR=`grep "#define XA_TRACKER_VERSION_MINOR" $XA_HEADER | $SED 's/^#define XA_TRACKER_VERSION_MINOR //'`
XA_TINY=`grep "#define XA_TRACKER_VERSION_PATCH" $XA_HEADER | $SED 's/^#define XA_TRACKER_VERSION_PATCH //'`

AC_SUBST([XA_MAJOR], $XA_MAJOR)
AC_SUBST([XA_MINOR], $XA_MINOR)
AC_SUBST([XA_TINY], $XA_TINY)
AC_SUBST([XA_VERSION], "$XA_MAJOR.$XA_MINOR.$XA_TINY")

AC_ARG_ENABLE(valgrind,
              [AS_HELP_STRING([--enable-valgrind],
                             [Build mesa with valgrind support (default: auto)])],
                             [VALGRIND=$enableval], [VALGRIND=auto])
if test "x$VALGRIND" != xno; then
	PKG_CHECK_MODULES(VALGRIND, [valgrind], [have_valgrind=yes], [have_valgrind=no])
fi
AC_MSG_CHECKING([whether to enable Valgrind support])
if test "x$VALGRIND" = xauto; then
	VALGRIND="$have_valgrind"
fi

if test "x$VALGRIND" = "xyes"; then
	if ! test "x$have_valgrind" = xyes; then
		AC_MSG_ERROR([Valgrind support required but not present])
	fi
	AC_DEFINE([HAVE_VALGRIND], 1, [Use valgrind intrinsics to suppress false warnings])
fi

AC_MSG_RESULT([$VALGRIND])

dnl Restore LDFLAGS and CPPFLAGS
LDFLAGS="$_SAVE_LDFLAGS"
CPPFLAGS="$_SAVE_CPPFLAGS"

dnl Suppress clang's warnings about unused CFLAGS and CXXFLAGS
if test "x$acv_mesa_CLANG" = xyes; then
    CFLAGS="$CFLAGS -Qunused-arguments"
    CXXFLAGS="$CXXFLAGS -Qunused-arguments"
fi

dnl Add user CFLAGS and CXXFLAGS
CFLAGS="$CFLAGS $USER_CFLAGS"
CXXFLAGS="$CXXFLAGS $USER_CXXFLAGS"

dnl Substitute the config
AC_CONFIG_FILES([Makefile
		src/Makefile
		src/compiler/Makefile
		src/egl/Makefile
		src/egl/main/egl.pc
		src/egl/wayland/wayland-drm/Makefile
		src/egl/wayland/wayland-egl/Makefile
		src/egl/wayland/wayland-egl/wayland-egl.pc
		src/gallium/Makefile
		src/gallium/auxiliary/Makefile
		src/gallium/auxiliary/pipe-loader/Makefile
		src/gallium/drivers/freedreno/Makefile
		src/gallium/drivers/ddebug/Makefile
		src/gallium/drivers/i915/Makefile
		src/gallium/drivers/ilo/Makefile
		src/gallium/drivers/llvmpipe/Makefile
		src/gallium/drivers/noop/Makefile
		src/gallium/drivers/nouveau/Makefile
		src/gallium/drivers/r300/Makefile
		src/gallium/drivers/r600/Makefile
		src/gallium/drivers/radeon/Makefile
		src/gallium/drivers/radeonsi/Makefile
		src/gallium/drivers/rbug/Makefile
		src/gallium/drivers/softpipe/Makefile
		src/gallium/drivers/svga/Makefile
		src/gallium/drivers/swr/Makefile
		src/gallium/drivers/trace/Makefile
		src/gallium/drivers/vc4/Makefile
		src/gallium/drivers/virgl/Makefile
		src/gallium/state_trackers/clover/Makefile
		src/gallium/state_trackers/dri/Makefile
		src/gallium/state_trackers/glx/xlib/Makefile
		src/gallium/state_trackers/nine/Makefile
		src/gallium/state_trackers/omx/Makefile
		src/gallium/state_trackers/osmesa/Makefile
		src/gallium/state_trackers/va/Makefile
		src/gallium/state_trackers/vdpau/Makefile
		src/gallium/state_trackers/xa/Makefile
		src/gallium/state_trackers/xvmc/Makefile
		src/gallium/targets/d3dadapter9/Makefile
		src/gallium/targets/d3dadapter9/d3d.pc
		src/gallium/targets/dri/Makefile
		src/gallium/targets/libgl-xlib/Makefile
		src/gallium/targets/omx/Makefile
		src/gallium/targets/opencl/Makefile
		src/gallium/targets/opencl/mesa.icd
		src/gallium/targets/osmesa/Makefile
		src/gallium/targets/osmesa/osmesa.pc
		src/gallium/targets/pipe-loader/Makefile
		src/gallium/targets/va/Makefile
		src/gallium/targets/vdpau/Makefile
		src/gallium/targets/xa/Makefile
		src/gallium/targets/xa/xatracker.pc
		src/gallium/targets/xvmc/Makefile
		src/gallium/tests/trivial/Makefile
		src/gallium/tests/unit/Makefile
		src/gallium/winsys/freedreno/drm/Makefile
		src/gallium/winsys/i915/drm/Makefile
		src/gallium/winsys/intel/drm/Makefile
		src/gallium/winsys/nouveau/drm/Makefile
		src/gallium/winsys/radeon/drm/Makefile
		src/gallium/winsys/amdgpu/drm/Makefile
		src/gallium/winsys/svga/drm/Makefile
		src/gallium/winsys/sw/dri/Makefile
		src/gallium/winsys/sw/kms-dri/Makefile
		src/gallium/winsys/sw/null/Makefile
		src/gallium/winsys/sw/wrapper/Makefile
		src/gallium/winsys/sw/xlib/Makefile
		src/gallium/winsys/vc4/drm/Makefile
		src/gallium/winsys/virgl/drm/Makefile
		src/gallium/winsys/virgl/vtest/Makefile
		src/gbm/Makefile
		src/gbm/main/gbm.pc
		src/glx/Makefile
		src/glx/apple/Makefile
		src/glx/tests/Makefile
		src/gtest/Makefile
		src/loader/Makefile
		src/mapi/Makefile
		src/mapi/es1api/glesv1_cm.pc
		src/mapi/es2api/glesv2.pc
		src/mapi/glapi/gen/Makefile
		src/mesa/Makefile
		src/mesa/gl.pc
		src/mesa/drivers/dri/dri.pc
		src/mesa/drivers/dri/common/Makefile
		src/mesa/drivers/dri/common/xmlpool/Makefile
		src/mesa/drivers/dri/i915/Makefile
		src/mesa/drivers/dri/i965/Makefile
		src/mesa/drivers/dri/Makefile
		src/mesa/drivers/dri/nouveau/Makefile
		src/mesa/drivers/dri/r200/Makefile
		src/mesa/drivers/dri/radeon/Makefile
		src/mesa/drivers/dri/swrast/Makefile
		src/mesa/drivers/osmesa/Makefile
		src/mesa/drivers/osmesa/osmesa.pc
		src/mesa/drivers/x11/Makefile
		src/mesa/main/tests/Makefile
		src/util/Makefile
		src/util/tests/hash_table/Makefile])

AC_OUTPUT

dnl
dnl Output some configuration info for the user
dnl
echo ""
echo "        prefix:          $prefix"
echo "        exec_prefix:     $exec_prefix"
echo "        libdir:          $libdir"
echo "        includedir:      $includedir"

dnl API info
echo ""
echo "        OpenGL:          $enable_opengl (ES1: $enable_gles1 ES2: $enable_gles2)"

dnl Driver info
echo ""
case "x$enable_osmesa$enable_gallium_osmesa" in
xnoyes)
        echo "        OSMesa:          lib$OSMESA_LIB (Gallium)"
        ;;
xyesno)
        echo "        OSMesa:          lib$OSMESA_LIB"
        ;;
xnono)
        echo "        OSMesa:          no"
        ;;
esac

echo ""
if test "x$enable_dri" != xno; then
        echo "        DRI platform:    $dri_platform"
        if test -z "$DRI_DIRS"; then
            echo "        DRI drivers:     no"
        else
            echo "        DRI drivers:     $DRI_DIRS"
        fi
        echo "        DRI driver dir:  $DRI_DRIVER_INSTALL_DIR"
fi

case "x$enable_glx$enable_xlib_glx" in
xyesyes)
    echo "        GLX:             Xlib-based"
    ;;
xyesno)
    echo "        GLX:             DRI-based"
    ;;
*)
    echo "        GLX:             $enable_glx"
    ;;
esac

dnl EGL
echo ""
echo "        EGL:             $enable_egl"
if test "$enable_egl" = yes; then
    echo "        EGL platforms:   $egl_platforms"

    egl_drivers=""
    if test "x$HAVE_EGL_DRIVER_DRI2" != "x"; then
        egl_drivers="$egl_drivers builtin:egl_dri2"
    fi
    if test "x$HAVE_EGL_DRIVER_DRI3" != "x"; then
        egl_drivers="$egl_drivers builtin:egl_dri3"
    fi

    echo "        EGL drivers:    $egl_drivers"
fi

echo ""
if test "x$MESA_LLVM" = x1; then
    echo "        llvm:            yes"
    echo "        llvm-config:     $LLVM_CONFIG"
    echo "        llvm-version:    $LLVM_VERSION"
else
    echo "        llvm:            no"
fi

echo ""
if test -n "$with_gallium_drivers"; then
    echo "        Gallium drivers: $gallium_drivers"
    echo "        Gallium st:      $gallium_st"
else
    echo "        Gallium:         no"
fi

dnl Shader cache
echo ""
echo "        Shader cache:    $enable_shader_cache"
if test "x$enable_shader_cache" = "xyes"; then
    echo "        With SHA1 from:  $with_sha1"
fi

dnl Libraries
echo ""
echo "        Shared libs:     $enable_shared"
echo "        Static libs:     $enable_static"
echo "        Shared-glapi:    $enable_shared_glapi"

dnl Compiler options
# cleanup the CFLAGS/CXXFLAGS/DEFINES vars
cflags=`echo $CFLAGS | \
    $SED 's/^ *//;s/  */ /;s/ *$//'`
cxxflags=`echo $CXXFLAGS | \
    $SED 's/^ *//;s/  */ /;s/ *$//'`
defines=`echo $DEFINES | $SED 's/^ *//;s/  */ /;s/ *$//'`
echo ""
echo "        CFLAGS:          $cflags"
echo "        CXXFLAGS:        $cxxflags"
echo "        Macros:          $defines"
echo ""
if test "x$MESA_LLVM" = x1; then
    echo "        LLVM_CFLAGS:     $LLVM_CFLAGS"
    echo "        LLVM_CXXFLAGS:   $LLVM_CXXFLAGS"
    echo "        LLVM_CPPFLAGS:   $LLVM_CPPFLAGS"
    echo "        LLVM_LDFLAGS:    $LLVM_LDFLAGS"
    echo ""
fi
echo "        PYTHON2:         $PYTHON2"

echo ""
echo "        Run '${MAKE-make}' to build Mesa"
echo ""