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# ===========================================================================
# https://www.gnu.org/software/autoconf-archive/ax_check_glx.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_CHECK_GLX
#
# DESCRIPTION
#
# Check for GLX. If GLX is found, the required preprocessor and linker
# flags are included in the output variables "GLX_CFLAGS" and "GLX_LIBS",
# respectively. If no GLX implementation is found, "no_glx" is set to
# "yes".
#
# If the header "GL/glx.h" is found, "HAVE_GL_GLX_H" is defined. If the
# header "OpenGL/glx.h" is found, HAVE_OPENGL_GLX_H is defined. These
# preprocessor definitions may not be mutually exclusive.
#
# You should use something like this in your headers:
#
# # if defined(HAVE_WINDOWS_H) && defined(_WIN32)
# # include <windows.h>
# # endif
# # if defined(HAVE_GL_GLX_H)
# # include <GL/glx.h>
# # elif defined(HAVE_OPENGL_GLX_H)
# # include <OpenGL/glx.h>
# # else
# # error no glx.h
# # endif
#
# LICENSE
#
# Copyright (c) 2009 Braden McDaniel <braden@endoframe.com>
# Copyright (c) 2013-2014 Bastien Roucaries <roucaries.bastien+autoconf@gmail.com>
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2 of the License, or (at your
# option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program. If not, see <https://www.gnu.org/licenses/>.
#
# As a special exception, the respective Autoconf Macro's copyright owner
# gives unlimited permission to copy, distribute and modify the configure
# scripts that are the output of Autoconf when processing the Macro. You
# need not follow the terms of the GNU General Public License when using
# or distributing such scripts, even though portions of the text of the
# Macro appear in them. The GNU General Public License (GPL) does govern
# all other use of the material that constitutes the Autoconf Macro.
#
# This special exception to the GPL applies to versions of the Autoconf
# Macro released by the Autoconf Archive. When you make and distribute a
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
#serial 8
# example program
m4_define([_AX_CHECK_GLX_PROGRAM],
[AC_LANG_PROGRAM([[
# if defined(HAVE_WINDOWS_H) && defined(_WIN32)
# include <windows.h>
# endif
# ifdef HAVE_GL_GLX_H
# include <GL/glx.h>
# elif defined(HAVE_OPENGL_GLX_H)
# include <OpenGL/glx.h>
# else
# error no glx.h
# endif
]],[[
int major, minor;
(void)glXQueryVersion(0,&major,&minor);]])])
dnl Default include : add windows.h
dnl see http://www.opengl.org/wiki/Platform_specifics:_Windows
dnl (acceded 20120801)
AC_DEFUN([_AX_CHECK_GLX_INCLUDES_DEFAULT],dnl
[
AC_INCLUDES_DEFAULT
[
# if defined(HAVE_WINDOWS_H) && defined(_WIN32)
# include <windows.h>
# endif
]
])
dnl local save flags
AC_DEFUN([_AX_CHECK_GLX_SAVE_FLAGS],
[dnl
ax_check_glx_saved_libs="${LIBS}"
ax_check_glx_saved_cflags="${CFLAGS}"
ax_check_glx_saved_cppflags="${CPPFLAGS}"
ax_check_glx_saved_ldflags="${LDFLAGS}"
])
dnl local restore flags
AC_DEFUN([_AX_CHECK_GLX_RESTORE_FLAGS],
[dnl
LIBS="${ax_check_glx_saved_libs}"
CFLAGS="${ax_check_glx_saved_cflags}"
CPPFLAGS="${ax_check_glx_saved_cppflags}"
LDFLAGS="${ax_check_glx_saved_ldflags}"
])
# compile the example program
AC_DEFUN([_AX_CHECK_GLX_COMPILE],
[dnl
AC_LANG_PUSH([C])
_AX_CHECK_GLX_SAVE_FLAGS()
CFLAGS="${GLX_CFLAGS} ${CFLAGS}"
AC_COMPILE_IFELSE([_AX_CHECK_GLX_PROGRAM],
[ax_check_glx_compile_opengl="yes"],
[ax_check_glx_compile_opengl="no"])
_AX_CHECK_GLX_RESTORE_FLAGS()
AC_LANG_POP([C])
])
# compile the example program (cache)
AC_DEFUN([_AX_CHECK_GLX_COMPILE_CV],
[dnl
AC_CACHE_CHECK([for compiling a minimal OpenGL Utility (GLX) program],[ax_cv_check_glx_compile_opengl],
[_AX_CHECK_GLX_COMPILE()
ax_cv_check_glx_compile_opengl="${ax_check_glx_compile_opengl}"])
ax_check_glx_compile_opengl="${ax_cv_check_glx_compile_opengl}"
])
# link the example program
AC_DEFUN([_AX_CHECK_GLX_LINK],
[dnl
AC_LANG_PUSH([C])
_AX_CHECK_GLX_SAVE_FLAGS()
CFLAGS="${GLX_CFLAGS} ${CFLAGS}"
LIBS="${GLX_LIBS} ${LIBS}"
LDFLAGS="${GLX_LDFLAGS} ${LDFLAGS}"
AC_LINK_IFELSE([_AX_CHECK_GLX_PROGRAM],
[ax_check_glx_link_opengl="yes"],
[ax_check_glx_link_opengl="no"])
_AX_CHECK_GLX_RESTORE_FLAGS()
AC_LANG_POP([C])
])
# link the example program (cache)
AC_DEFUN([_AX_CHECK_GLX_LINK_CV],
[dnl
AC_CACHE_CHECK([for linking a minimal OpenGL Utility (GLX) program],[ax_cv_check_glx_link_opengl],
[_AX_CHECK_GLX_LINK()
ax_cv_check_glx_link_opengl="${ax_check_glx_link_opengl}"])
ax_check_glx_link_opengl="${ax_cv_check_glx_link_opengl}"
])
dnl Check headers manually (default case)
AC_DEFUN([_AX_CHECK_GLX_HEADERS],
[AC_LANG_PUSH([C])
_AX_CHECK_GLX_SAVE_FLAGS()
CFLAGS="${GLX_CFLAGS} ${CFLAGS}"
# see comment in _AX_CHECK_GLX_INCLUDES_DEFAULT
AC_CHECK_HEADERS([windows.h],[],[],[AC_INCLUDES_DEFAULT])
AC_CHECK_HEADERS([GL/glx.h OpenGL/glx.h],
[ax_check_glx_have_headers="yes";break],
[ax_check_glx_have_headers_headers="no"],
[_AX_CHECK_GLX_INCLUDES_DEFAULT()])
# do not try darwin specific OpenGl/gl.h
_AX_CHECK_GLX_RESTORE_FLAGS()
AC_LANG_POP([C])
])
# dnl try to found library (generic case)
# dnl $1 is set to the library to found
AC_DEFUN([_AX_CHECK_GLX_MANUAL_LIBS_GENERIC],
[dnl
ax_check_glx_manual_libs_generic_extra_libs="$1"
AS_IF([test "X$ax_check_glx_manual_libs_generic_extra_libs" = "X"],
[AC_MSG_ERROR([AX_CHECK_GLX_MANUAL_LIBS_GENERIC argument must no be empty])])
AC_LANG_PUSH([C])
_AX_CHECK_GLX_SAVE_FLAGS()
CFLAGS="${GLX_CFLAGS} ${CFLAGS}"
LIBS="${GLX_LIBS} ${LIBS}"
AC_SEARCH_LIBS([glXGetClientString],[$ax_check_glx_manual_libs_generic_extra_libs],
[ax_check_glx_lib_opengl="yes"],
[ax_check_glx_lib_opengl="no"])
AS_CASE([$ac_cv_search_glXGetClientString],
["none required"],[],
[no],[],
[GLX_LIBS="${ac_cv_search_glXGetClientString} ${GLX_LIBS}"])
_AX_CHECK_GLX_RESTORE_FLAGS()
AC_LANG_PUSH([C])
])
dnl Check library manually: subroutine must set
dnl $ax_check_gl_lib_opengl={yes,no}
AC_DEFUN([_AX_CHECK_GLX_MANUAL_LIBS],
[AC_REQUIRE([AC_CANONICAL_HOST])
GLX_LIBS="${GLX_LIBS} ${GL_LIBS}"
_AX_CHECK_GLX_MANUAL_LIBS_GENERIC([GLX glx MesaGLX])
AC_CACHE_CHECK([for OpenGL Utility (GLX) libraries],[ax_cv_check_glx_lib_opengl],
[ax_cv_check_glx_lib_opengl="${ax_check_glx_lib_opengl}"])
ax_check_glx_lib_opengl="${ax_cv_check_glx_lib_opengl}"
])
dnl Manual way to detect GLX
AC_DEFUN([_AX_CHECK_GLX_MANUAL],
[dnl
# inherit cflags
GLX_CFLAGS="${GLX_CFLAGS} ${GL_CFLAGS}"
# check headers
_AX_CHECK_GLX_HEADERS
AS_IF([test "X$ax_check_glx_have_headers" = "Xyes"],
[_AX_CHECK_GLX_MANUAL_LIBS],
[ax_check_glx_lib_opengl="no"])
AS_IF([test "X$ax_check_glx_lib_opengl" = "Xyes"],
[_AX_CHECK_GLX_COMPILE_CV()],
[ax_cv_check_glx_compile_opengl="no"])
AS_IF([test "X$ax_cv_check_glx_compile_opengl" = "Xyes"],
[_AX_CHECK_GLX_LINK_CV()],
[ax_cv_check_glx_link_opengl="no"])
AS_IF([test "X$ax_cv_check_glx_link_opengl" = "Xyes"],
[no_glx="no"],
[no_glx="yes"])
])
# detect using pkgconfig
AC_DEFUN([_AX_CHECK_GLX_PKG_CONFIG],
[
AC_REQUIRE([PKG_PROG_PKG_CONFIG])
PKG_CHECK_MODULES([GLX],[glx],[ax_check_glx_pkg_config=yes],[ax_check_glx_pkg_config=no])
AS_IF([test "X$ax_check_glx_pkg_config" = "Xyes"],[
# check headers
AC_LANG_PUSH([C])
_AX_CHECK_GLX_SAVE_FLAGS()
CFLAGS="${GLX_CFLAGS} ${CFLAGS}"
AC_CHECK_HEADERS([windows.h],[],[],[AC_INCLUDES_DEFAULT])
AC_CHECK_HEADERS([GL/glx.h OpenGL/glx.h],
[ax_check_glx_have_headers="yes";break],
[ax_check_glx_have_headers_headers="no"],
[_AX_CHECK_GLX_INCLUDES_DEFAULT()])
_AX_CHECK_GLX_RESTORE_FLAGS()
AC_LANG_POP([C])
AC_CACHE_CHECK([for OpenGL Utility (GLX) headers],[ax_cv_check_glx_have_headers],
[ax_cv_check_glx_have_headers="${ax_check_glx_have_headers}"])
# pkgconfig library are supposed to work ...
AS_IF([test "X$ax_cv_check_glx_have_headers" = "Xno"],
[AC_MSG_ERROR("Pkgconfig detected OpenGL Utility (GLX) library has no headers!")])
_AX_CHECK_GLX_COMPILE_CV()
AS_IF([test "X$ax_cv_check_glx_compile_opengl" = "Xno"],
[AC_MSG_ERROR("Pkgconfig detected OpenGL Utility (GLX) library could not be used for compiling minimal program!")])
_AX_CHECK_GLX_LINK_CV()
AS_IF([test "X$ax_cv_check_glx_link_opengl" = "Xno"],
[AC_MSG_ERROR("Pkgconfig detected OpenGL Utility (GLX) library could not be used for linking minimal program!")])
])
])
# entry point
AC_DEFUN([AX_CHECK_GLX],dnl
[
AC_REQUIRE([AX_CHECK_GL])
AC_REQUIRE([PKG_PROG_PKG_CONFIG])
# set flags
no_glx="yes"
have_GLX="no"
AC_MSG_CHECKING([for a working OpenGL Utility (GLX) implementation by pkg-config])
# try first pkgconfig
AS_IF([test "X${PKG_CONFIG}" = "X"],
[AC_MSG_RESULT([no])
ax_check_glx_pkg_config=no],
[AC_MSG_RESULT([yes])
_AX_CHECK_GLX_PKG_CONFIG()])
# if no pkg-config or pkg-config fail try manual way
AS_IF([test "X$ax_check_glx_pkg_config" = "Xno"],
[_AX_CHECK_GLX_MANUAL()],
[no_glx=no])
AC_MSG_CHECKING([for a working OpenGL Utility (GLX) implementation])
AS_IF([test "X$no_glx" = "Xno"],
[have_GLX="yes"
AC_MSG_RESULT([yes])
AC_MSG_CHECKING([for CFLAGS needed for OpenGL Utility (GLX)])
AC_MSG_RESULT(["${GLX_CFLAGS}"])
AC_MSG_CHECKING([for LIBS needed for OpenGL Utility (GLX)])
AC_MSG_RESULT(["${GLX_LIBS}"])
AC_MSG_CHECKING([for LDFLAGS needed for OpenGL Utility (GLX)])
AC_MSG_RESULT(["${GLX_LDFLAGS}"])],
[AC_MSG_RESULT([no])
GLX_CFLAGS=""
GLX_LIBS=""
GLX_LDFLAGS=""])
AC_SUBST([GLX_CFLAGS])
AC_SUBST([GLX_LIBS])
AC_SUBST([GLX_LDFLAGS])
])
|
