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# ===========================================================================
# http://autoconf-archive.cryp.to/ax_check_glut.html
# ===========================================================================
#
# SYNOPSIS
#
# AX_CHECK_GLUT
#
# DESCRIPTION
#
# Check for GLUT. If GLUT is found, the required compiler and linker flags
# are included in the output variables "GLUT_CFLAGS" and "GLUT_LIBS",
# respectively. If GLUT is not found, "no_glut" is set to "yes".
#
# If the header "GL/glut.h" is found, "HAVE_GL_GLUT_H" is defined. If the
# header "GLUT/glut.h" is found, HAVE_GLUT_GLUT_H is defined. These
# preprocessor definitions may not be mutually exclusive.
#
# LAST MODIFICATION
#
# 2008-10-07
#
# COPYLEFT
#
# Copyright (c) 2008 Braden McDaniel <braden@endoframe.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 <http://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 Macro 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.
AC_DEFUN([AX_CHECK_GLUT],
[AC_REQUIRE([AX_CHECK_GLU])dnl
AC_REQUIRE([AC_PATH_XTRA])dnl
ax_save_CPPFLAGS="${CPPFLAGS}"
CPPFLAGS="${GLU_CFLAGS} ${CPPFLAGS}"
AC_CHECK_HEADERS([GL/glut.h GLUT/glut.h])
CPPFLAGS="${ax_save_CPPFLAGS}"
GLUT_CFLAGS=${GLU_CFLAGS}
GLUT_LIBS=${GLU_LIBS}
m4_define([AX_CHECK_GLUT_PROGRAM],
[AC_LANG_PROGRAM([[
# if HAVE_WINDOWS_H && defined(_WIN32)
# include <windows.h>
# endif
# ifdef HAVE_GL_GLUT_H
# include <GL/glut.h>
# elif defined(HAVE_GLUT_GLUT_H)
# include <GLUT/glut.h>
# else
# error no glut.h
# endif]],
[[glutMainLoop()]])])
#
# If X is present, assume GLUT depends on it.
#
AS_IF([test X$no_x != Xyes],
[GLUT_LIBS="${X_PRE_LIBS} -lXmu -lXi ${X_EXTRA_LIBS} ${GLUT_LIBS}"])
AC_CACHE_CHECK([for GLUT library], [ax_cv_check_glut_libglut],
[ax_cv_check_glut_libglut="no"
AC_LANG_PUSH(C)
ax_save_CPPFLAGS="${CPPFLAGS}"
CPPFLAGS="${GLUT_CFLAGS} ${CPPFLAGS}"
ax_save_LIBS="${LIBS}"
LIBS=""
ax_check_libs="-lglut32 -lglut"
for ax_lib in ${ax_check_libs}; do
AS_IF([test X$ax_compiler_ms = Xyes],
[ax_try_lib=`echo $ax_lib | sed -e 's/^-l//' -e 's/$/.lib/'`],
[ax_try_lib="${ax_lib}"])
LIBS="${ax_try_lib} ${GLUT_LIBS} ${ax_save_LIBS}"
AC_LINK_IFELSE([AX_CHECK_GLUT_PROGRAM],
[ax_cv_check_glut_libglut="${ax_try_lib}"; break])
done
AS_IF([test "X$ax_cv_check_glut_libglut" = Xno -a "X$no_x" = Xyes],
[LIBS='-framework GLUT'
AC_LINK_IFELSE([AX_CHECK_GLUT_PROGRAM],
[ax_cv_check_glut_libglut="$LIBS"])])
CPPFLAGS="${ax_save_CPPFLAGS}"
LIBS="${ax_save_LIBS}"
AC_LANG_POP(C)])
AS_IF([test "X$ax_cv_check_glut_libglut" = Xno],
[no_glut="yes"; GLUT_CFLAGS=""; GLUT_LIBS=""],
[GLUT_LIBS="${ax_cv_check_glut_libglut} ${GLUT_LIBS}"])
AC_SUBST([GLUT_CFLAGS])
AC_SUBST([GLUT_LIBS])
])dnl
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