1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
# -*- mode: autoconf -*-
#
# AX_CHECK_GL
#
# 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. If no usable GL implementation is found, "no_gl"
# is set to "yes".
#
# If the header "GL/gl.h" is found, "HAVE_GL_GL_H" is defined. If the header
# "OpenGL/gl.h" is found, HAVE_OPENGL_GL_H is defined. These preprocessor
# definitions may not be mutually exclusive.
#
# version: 2.6
# author: 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, 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, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.
#
# As a special exception, the you may 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.
#
AC_DEFUN([AX_CHECK_GL],
[AC_REQUIRE([AC_CANONICAL_HOST])dnl
AC_REQUIRE([AC_PATH_X])dnl
AC_REQUIRE([AC_PROG_SED])dnl
AC_REQUIRE([AX_PTHREAD])dnl
AC_LANG_PUSH([C])
AX_LANG_COMPILER_MS
AS_IF([test X$ax_compiler_ms = Xno],
[GL_CFLAGS="${PTHREAD_CFLAGS}"; GL_LIBS="${PTHREAD_LIBS}"])
#
# Use x_includes and x_libraries if they have been set (presumably by
# AC_PATH_X).
#
AS_IF([test X$no_x != Xyes -a -n "$x_includes"],
[GL_CFLAGS="-I$x_includes $GL_CFLAGS"])
AC_CHECK_HEADERS([windows.h])
ax_save_CPPFLAGS=$CPPFLAGS
CPPFLAGS="$GL_CFLAGS $CPPFLAGS"
AC_CHECK_HEADERS([GL/gl.h OpenGL/gl.h], , , [
# if defined(HAVE_WINDOWS_H) && defined(_WIN32)
# include <windows.h>
# endif
])
CPPFLAGS=$ax_save_CPPFLAGS
m4_define([AX_CHECK_GL_PROGRAM],
[AC_LANG_PROGRAM([[
# if defined(HAVE_WINDOWS_H) && defined(_WIN32)
# include <windows.h>
# endif
# ifdef HAVE_GL_GL_H
# include <GL/gl.h>
# elif defined(HAVE_OPENGL_GL_H)
# include <OpenGL/gl.h>
# else
# error no gl.h
# endif]],
[[glBegin(0)]])])
m4_define([AX_CHECK_GL_GLX_PROGRAM],
[AC_LANG_PROGRAM([[
# if defined(HAVE_WINDOWS_H) && defined(_WIN32)
# include <windows.h>
# endif
# ifdef HAVE_GL_GL_H
# include <GL/gl.h>
# elif defined(HAVE_OPENGL_GL_H)
# include <OpenGL/gl.h>
# else
# error no gl.h
# endif]],
[[glXQueryVersion(0, 0, 0)]])])
AC_CACHE_CHECK([for OpenGL library], [ax_cv_check_gl_libgl],
[ax_cv_check_gl_libgl=no
case $host_cpu in
x86_64) ax_check_gl_libdir=lib64 ;;
*) ax_check_gl_libdir=lib ;;
esac
ax_save_CPPFLAGS=$CPPFLAGS
CPPFLAGS="$CPPFLAGS $GL_CFLAGS"
ax_save_LDFLAGS=$LDFLAGS
AS_IF([test X$no_x != Xyes -a -n "$x_libraries"],
[LDFLAGS="$LDFLAGS -L$x_libraries"])
ax_save_LIBS=$LIBS
ax_check_libs="-lopengl32 -lGL"
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=$ax_lib])
LDFLAGS="$ax_save_LDFLAGS $GL_LIBS"
LIBS="$ax_try_lib $ax_save_LIBS"
AC_LINK_IFELSE([AX_CHECK_GL_PROGRAM],
[ax_cv_check_gl_libgl=$ax_try_lib; break],
[ax_check_gl_nvidia_flags="-L/usr/$ax_check_gl_libdir/nvidia"
LDFLAGS="$ax_save_LDFLAGS $GL_LIBS $ax_check_gl_nvidia_flags"
AC_LINK_IFELSE([AX_CHECK_GL_PROGRAM],
[ax_cv_check_gl_libgl="$ax_check_gl_nvidia_flags $ax_try_lib"; break],
[ax_check_gl_dylib_flag='-dylib_file /System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib:/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib'
LDFLAGS="$ax_save_LDFLAGS $GL_LIBS $ax_check_gl_dylib_flag"
AC_LINK_IFELSE([AX_CHECK_GL_PROGRAM],
[ax_cv_check_gl_libgl="$ax_check_gl_dylib_flag $ax_try_lib"; break])])])
done
#
# If no_x is "yes", we don't want to wind up using a libGL that is
# linked with X11. Test to see if the found libGL includes GLX
# functions. If it does and no_x is "yes", we want to reset
# ax_cv_check_gl_libgl back to "no".
#
# Note that LDFLAGS and LIBS should still have whatever values they
# had when we broke out of the test loop above; use that.
#
AS_IF([test "X$ax_cv_check_gl_libgl" != Xno],
[AC_LINK_IFELSE([AX_CHECK_GL_GLX_PROGRAM],
[AS_IF([test X$no_x = Xyes],
[ax_cv_check_gl_libgl=no])])])
LIBS=$ax_save_LIBS
AS_IF([test "X$ax_cv_check_gl_libgl" = Xno -a X$no_x = Xyes],
[LDFLAGS="$ax_save_LDFLAGS -framework OpenGL"
AC_LINK_IFELSE([AX_CHECK_GL_PROGRAM],
[ax_cv_check_gl_libgl='-framework OpenGL'])])
LDFLAGS=$ax_save_LDFLAGS
CPPFLAGS=$ax_save_CPPFLAGS])
AS_IF([test "X$ax_cv_check_gl_libgl" = Xno],
[no_gl=yes; GL_CFLAGS=""; GL_LIBS=""],
[GL_LIBS="$ax_cv_check_gl_libgl $GL_LIBS"])
AC_LANG_POP([C])
AC_SUBST([GL_CFLAGS])
AC_SUBST([GL_LIBS])
])dnl
|
