darwin: Use -fvisibility=hidden to set default symbol visibility

Signed-off-by: Jeremy Huddleston <jeremyhu@apple.com>

configs/darwin

@@ -25,9 +25,9 @@ DEFINES =  -D_DARWIN_C_SOURCE -DPTHREADS -D_GNU_SOURCE \
 
 ARCH_FLAGS += $(RC_CFLAGS)
 
-CFLAGS =  -ggdb3 -Os -Wall -Wmissing-prototypes -std=c99 -ffast-math -fno-strict-aliasing \
+CFLAGS =  -ggdb3 -Os -Wall -Wmissing-prototypes -std=c99 -ffast-math -fno-strict-aliasing -fvisibility=hidden \
 	-I$(INSTALL_DIR)/include -I$(X11_DIR)/include $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(ASM_FLAGS) $(DEFINES)
-CXXFLAGS =  -ggdb3 -Os -Wall -fno-strict-aliasing \
+CXXFLAGS =  -ggdb3 -Os -Wall -fno-strict-aliasing -fvisibility=hidden \
 	-I$(INSTALL_DIR)/include -I$(X11_DIR)/include $(OPT_FLAGS) $(PIC_FLAGS) $(ARCH_FLAGS) $(ASM_FLAGS) $(DEFINES)
 
 # Library names (actual file names)

src/glx/apple/apple_glapi.c

@@ -49,13 +49,9 @@
 #define OPENGL_FRAMEWORK_PATH "/System/Library/Frameworks/OpenGL.framework/OpenGL"
 #endif
 
-__private_extern__
 struct _glapi_table * __ogl_framework_api = NULL;
-
-__private_extern__
 struct _glapi_table * __applegl_api = NULL;
 
-__private_extern__
 void apple_xgl_init_direct(void) {
     static void *handle;
     const char *opengl_framework_path;

src/glx/apple/apple_xgl_api.h

@@ -29,24 +29,15 @@
 
 #ifndef APPLE_XGL_API_H
 
-__private_extern__ void 
-__applegl_glReadPixels(GLint x, GLint y, GLsizei width, GLsizei height,
+void __applegl_glReadPixels(GLint x, GLint y, GLsizei width, GLsizei height,
                             GLenum format, GLenum type, void *pixels);
+void __applegl_glCopyPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum type);
+void __applegl_glCopyColorTable(GLenum target, GLenum internalformat, GLint x, GLint y,
+                                GLsizei width);
 
-__private_extern__ void
-__applegl_glCopyPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum type);
+void __applegl_glDrawBuffer(GLenum mode);
+void __applegl_glDrawBuffersARB(GLsizei n, const GLenum * bufs);
 
-__private_extern__ void
-__applegl_glCopyColorTable(GLenum target, GLenum internalformat, GLint x, GLint y,
-                           GLsizei width);
-
-__private_extern__ void
-__applegl_glDrawBuffer(GLenum mode);
-
-__private_extern__ void
-__applegl_glDrawBuffersARB(GLsizei n, const GLenum * bufs);
-
-__private_extern__ void
-__applegl_glViewport(GLint x, GLint y, GLsizei width, GLsizei height);
+void __applegl_glViewport(GLint x, GLint y, GLsizei width, GLsizei height);
 
 #endif