##### http://autoconf-archive.cryp.to/ax_check_gl.html # # SYNOPSIS # # AX_CHECK_GL # # DESCRIPTION # # Check for an OpenGL implementation. If GL is found, the required # compiler and linker flags are included in the output variables # "GL_CFLAGS" and "GL_LIBS", respectively. This macro adds the # configure option "--with-apple-opengl-framework", which users can # use to indicate that Apple's OpenGL framework should be used on Mac # OS X. If Apple's OpenGL framework is used, the symbol # "HAVE_APPLE_OPENGL_FRAMEWORK" is defined. If no GL implementation # is found, "no_gl" is set to "yes". # # LAST MODIFICATION # # 2004-11-15 # # COPYLEFT # # Copyright (c) 2004 Braden McDaniel <braden@endoframe.com> # # Copying and distribution of this file, with or without # modification, are permitted in any medium without royalty provided # the copyright notice and this notice are preserved. AC_DEFUN([AX_CHECK_GL], [AC_REQUIRE([AC_PATH_X])dnl AC_REQUIRE([ACX_PTHREAD])dnl # # There isn't a reliable way to know we should use the Apple OpenGL framework # without a configure option. A Mac OS X user may have installed an # alternative GL implementation (e.g., Mesa), which may or may not depend on X. # AC_ARG_WITH([apple-opengl-framework], [AC_HELP_STRING([--with-apple-opengl-framework], [use Apple OpenGL framework (Mac OS X only)])]) if test "X$with_apple_opengl_framework" = "Xyes"; then AC_DEFINE([HAVE_APPLE_OPENGL_FRAMEWORK], [1], [Use the Apple OpenGL framework.]) GL_LIBS="-framework OpenGL" else AC_LANG_PUSH(C) AX_LANG_COMPILER_MS if test X$ax_compiler_ms = Xno; then GL_CFLAGS="${PTHREAD_CFLAGS}" GL_LIBS="${PTHREAD_LIBS} -lm" fi # # Use x_includes and x_libraries if they have been set (presumably by # AC_PATH_X). # if test "X$no_x" != "Xyes"; then if test -n "$x_includes"; then GL_CFLAGS="-I${x_includes} ${GL_CFLAGS}" fi if test -n "$x_libraries"; then GL_LIBS="-L${x_libraries} -lX11 ${GL_LIBS}" fi fi AC_CHECK_HEADERS([windows.h]) AC_CACHE_CHECK([for OpenGL library], [ax_cv_check_gl_libgl], [ax_cv_check_gl_libgl="no" ax_save_CPPFLAGS="${CPPFLAGS}" CPPFLAGS="${GL_CFLAGS} ${CPPFLAGS}" ax_save_LIBS="${LIBS}" LIBS="" ax_check_libs="-lopengl32 -lGL" for ax_lib in ${ax_check_libs}; do if test X$ax_compiler_ms = Xyes; then ax_try_lib=`echo $ax_lib | sed -e 's/^-l//' -e 's/$/.lib/'` else ax_try_lib="${ax_lib}" fi LIBS="${ax_try_lib} ${GL_LIBS} ${ax_save_LIBS}" AC_LINK_IFELSE( [AC_LANG_PROGRAM([[ # if HAVE_WINDOWS_H && defined(_WIN32) # include <windows.h> # endif # include <GL/gl.h>]], [[glBegin(0)]])], [ax_cv_check_gl_libgl="${ax_try_lib}"; break]) done LIBS=${ax_save_LIBS} CPPFLAGS=${ax_save_CPPFLAGS}]) if test "X${ax_cv_check_gl_libgl}" = "Xno"; then no_gl="yes" GL_CFLAGS="" GL_LIBS="" else GL_LIBS="${ax_cv_check_gl_libgl} ${GL_LIBS}" fi AC_LANG_POP(C) fi AC_SUBST([GL_CFLAGS]) AC_SUBST([GL_LIBS]) ])dnl