1 dnl @synopsis AX_CHECK_GL
3 dnl Check for an OpenGL implementation. If GL is found, the required
4 dnl compiler and linker flags are included in the output variables
5 dnl "GL_CFLAGS" and "GL_LIBS", respectively. This macro adds the
6 dnl configure option "--with-apple-opengl-framework", which users can
7 dnl use to indicate that Apple's OpenGL framework should be used on Mac
8 dnl OS X. If Apple's OpenGL framework is used, the symbol
9 dnl "HAVE_APPLE_OPENGL_FRAMEWORK" is defined. If no GL implementation
10 dnl is found, "no_gl" is set to "yes".
12 dnl @category InstalledPackages
13 dnl @author Braden McDaniel <braden@endoframe.com>
14 dnl @version 2004-11-15
15 dnl @license AllPermissive
17 AC_DEFUN([AX_CHECK_GL],
18 [AC_REQUIRE([AC_PATH_X])dnl
19 AC_REQUIRE([ACX_PTHREAD])dnl
22 # There isn't a reliable way to know we should use the Apple OpenGL framework
23 # without a configure option. A Mac OS X user may have installed an
24 # alternative GL implementation (e.g., Mesa), which may or may not depend on X.
26 AC_ARG_WITH([apple-opengl-framework],
27 [AC_HELP_STRING([--with-apple-opengl-framework],
28 [use Apple OpenGL framework (Mac OS X only)])])
29 if test "X$with_apple_opengl_framework" = "Xyes"; then
30 AC_DEFINE([HAVE_APPLE_OPENGL_FRAMEWORK], [1],
31 [Use the Apple OpenGL framework.])
32 GL_LIBS="-framework OpenGL"
37 if test X$ax_compiler_ms = Xno; then
38 GL_CFLAGS="${PTHREAD_CFLAGS}"
39 GL_LIBS="${PTHREAD_LIBS} -lm"
43 # Use x_includes and x_libraries if they have been set (presumably by
46 if test "X$no_x" != "Xyes"; then
47 if test -n "$x_includes"; then
48 GL_CFLAGS="-I${x_includes} ${GL_CFLAGS}"
50 if test -n "$x_libraries"; then
51 GL_LIBS="-L${x_libraries} -lX11 ${GL_LIBS}"
55 AC_CHECK_HEADERS([windows.h])
57 AC_CACHE_CHECK([for OpenGL library], [ax_cv_check_gl_libgl],
58 [ax_cv_check_gl_libgl="no"
59 ax_save_CPPFLAGS="${CPPFLAGS}"
60 CPPFLAGS="${GL_CFLAGS} ${CPPFLAGS}"
61 ax_save_LIBS="${LIBS}"
63 ax_check_libs="-lopengl32 -lGL"
64 for ax_lib in ${ax_check_libs}; do
65 if test X$ax_compiler_ms = Xyes; then
66 ax_try_lib=`echo $ax_lib | sed -e 's/^-l//' -e 's/$/.lib/'`
68 ax_try_lib="${ax_lib}"
70 LIBS="${ax_try_lib} ${GL_LIBS} ${ax_save_LIBS}"
73 # if HAVE_WINDOWS_H && defined(_WIN32)
76 # include <GL/gl.h>]],
78 [ax_cv_check_gl_libgl="${ax_try_lib}"; break])
81 CPPFLAGS=${ax_save_CPPFLAGS}])
83 if test "X${ax_cv_check_gl_libgl}" = "Xno"; then
88 GL_LIBS="${ax_cv_check_gl_libgl} ${GL_LIBS}"