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