mesa/imports: let the build system detect strtok_r()

Closes: https://gitlab.freedesktop.org/mesa/mesa/issues/2013
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Tested-by: Prodea Alexandru-Liviu <liviuprodea@yahoo.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>

meson.build

@@ -1149,7 +1149,7 @@ foreach h : ['xlocale.h', 'sys/sysctl.h', 'linux/futex.h', 'endian.h', 'dlfcn.h'
   endif
 endforeach
 
-foreach f : ['strtof', 'mkostemp', 'timespec_get', 'memfd_create', 'random_r', 'flock']
+foreach f : ['strtof', 'mkostemp', 'timespec_get', 'memfd_create', 'random_r', 'flock', 'strtok_r']
   if cc.has_function(f)
     pre_args += '-DHAVE_@0@'.format(f.to_upper())
   endif

scons/gallium.py

@@ -381,6 +381,9 @@ def generate(env):
         if check_header(env, 'sys/shm.h'):
             cppdefines += ['HAVE_SYS_SHM_H']
 
+        if check_functions(env, ['strtok_r']):
+            cppdefines += ['HAVE_STRTOK_R']
+
         #FIXME: we should really be checking for the major()/minor()
         # functions/macros in these headers, but check_functions()'s
         # SConf.CheckFunc() doesn't seem to support macros.

src/mesa/main/imports.h

@@ -309,7 +309,7 @@ extern int
 _mesa_vsnprintf(char *str, size_t size, const char *fmt, va_list arg);
 
 
-#if defined(_WIN32) && !defined(strtok_r)
+#if defined(_WIN32) && !defined(HAVE_STRTOK_R)
 #define strtok_r strtok_s
 #endif