+# Check for -lGL or -lMesaGL.
+#
+###############################################################################
+
+have_gl=no
+ac_have_mesa_gl=no
+with_gl_req=unspecified
+gl_halfassed=no
+# Check whether --with-gl or --without-gl was given.
+if test "${with_gl+set}" = set; then
+ withval="$with_gl"
+ with_gl="$withval"; with_gl_req="$withval"
+else
+ with_gl=yes
+fi
+
+
+
+ case "$with_gl" in
+ yes) ;;
+ no) ;;
+
+ /*)
+ echo $ac_n "checking for GL headers""... $ac_c" 1>&6
+echo "configure:7194: checking for GL headers" >&5
+ d=$with_gl/include
+ if test -d $d; then
+ X_CFLAGS="-I$d $X_CFLAGS"
+ echo "$ac_t""$d" 1>&6
+ else
+ echo "$ac_t""not found ($d: no such directory)" 1>&6
+ fi
+
+ echo $ac_n "checking for GL libs""... $ac_c" 1>&6
+echo "configure:7204: checking for GL libs" >&5
+ d=$with_gl/lib
+ if test -d $d; then
+ X_LIBS="-L$d $X_LIBS"
+ echo "$ac_t""$d" 1>&6
+ else
+ echo "$ac_t""not found ($d: no such directory)" 1>&6
+ fi
+
+ # replace the directory string with "yes".
+ with_gl_req="yes"
+ with_gl=$with_gl_req
+ ;;
+
+ *)
+ echo ""
+ echo "error: argument to --with-gl must be \"yes\", \"no\", or a directory."
+ echo " If it is a directory, then \`DIR/include' will be added to"
+ echo " the -I list, and \`DIR/lib' will be added to the -L list."
+ exit 1
+ ;;
+ esac
+
+
+ac_mesagl_version=unknown
+ac_mesagl_version_string=unknown
+
+if test "$with_gl" = yes; then
+
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ if test \! -z "$includedir" ; then
+ CPPFLAGS="$CPPFLAGS -I$includedir"
+ fi
+ CPPFLAGS="$CPPFLAGS $X_CFLAGS"
+ ac_safe=`echo "GL/gl.h" | sed 'y%./+-%__p_%'`
+echo $ac_n "checking for GL/gl.h""... $ac_c" 1>&6
+echo "configure:7240: checking for GL/gl.h" >&5
+if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 7245 "configure"
+#include "confdefs.h"
+#include <GL/gl.h>
+EOF
+ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
+{ (eval echo configure:7250: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
+if test -z "$ac_err"; then
+ rm -rf conftest*
+ eval "ac_cv_header_$ac_safe=yes"
+else
+ echo "$ac_err" >&5
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ eval "ac_cv_header_$ac_safe=no"
+fi
+rm -f conftest*
+fi
+if eval "test \"`echo '$ac_cv_header_'$ac_safe`\" = yes"; then
+ echo "$ac_t""yes" 1>&6
+ have_gl=yes
+else
+ echo "$ac_t""no" 1>&6
+fi
+
+ CPPFLAGS="$ac_save_CPPFLAGS"
+ if test "$have_gl" = yes ; then
+
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ if test \! -z "$includedir" ; then
+ CPPFLAGS="$CPPFLAGS -I$includedir"
+ fi
+ CPPFLAGS="$CPPFLAGS $X_CFLAGS"
+ ac_safe=`echo "GL/glx.h" | sed 'y%./+-%__p_%'`
+echo $ac_n "checking for GL/glx.h""... $ac_c" 1>&6
+echo "configure:7281: checking for GL/glx.h" >&5
+if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 7286 "configure"
+#include "confdefs.h"
+#include <GL/glx.h>
+EOF
+ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
+{ (eval echo configure:7291: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
+if test -z "$ac_err"; then
+ rm -rf conftest*
+ eval "ac_cv_header_$ac_safe=yes"
+else
+ echo "$ac_err" >&5
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ eval "ac_cv_header_$ac_safe=no"
+fi
+rm -f conftest*
+fi
+if eval "test \"`echo '$ac_cv_header_'$ac_safe`\" = yes"; then
+ echo "$ac_t""yes" 1>&6
+ have_gl=yes
+else
+ echo "$ac_t""no" 1>&6
+fi
+
+ CPPFLAGS="$ac_save_CPPFLAGS"
+ fi
+
+ # If we have the headers, try and figure out which vendor it's from.
+ #
+ if test "$have_gl" = yes ; then
+
+ # We need to know whether it's MesaGL so that we know which libraries
+ # to link against.
+ #
+ echo $ac_n "checking whether GL is really MesaGL""... $ac_c" 1>&6
+echo "configure:7323: checking whether GL is really MesaGL" >&5
+if eval "test \"`echo '$''{'ac_cv_have_mesa_gl'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ ac_cv_have_mesa_gl=no
+
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ if test \! -z "$includedir" ; then
+ CPPFLAGS="$CPPFLAGS -I$includedir"
+ fi
+ CPPFLAGS="$CPPFLAGS $X_CFLAGS"
+ cat > conftest.$ac_ext <<EOF
+#line 7335 "configure"
+#include "confdefs.h"
+#include <GL/glx.h>
+EOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ egrep "Mesa" >/dev/null 2>&1; then
+ rm -rf conftest*
+ ac_cv_have_mesa_gl=yes
+fi
+rm -f conftest*
+
+ CPPFLAGS="$ac_save_CPPFLAGS"
+
+fi
+
+echo "$ac_t""$ac_cv_have_mesa_gl" 1>&6
+ ac_have_mesa_gl=$ac_cv_have_mesa_gl
+
+
+ gl_lib_1=""
+ GL_LIBS=""
+
+
+ # Some versions of MesaGL are compiled to require -lpthread.
+ # So if the Mesa headers exist, and -lpthread exists, then always
+ # link -lpthread after the Mesa libs (be they named -lGL or -lMesaGL.)
+ #
+ if test "$ac_have_mesa_gl" = yes; then
+ echo $ac_n "checking for pthread_create in -lpthread""... $ac_c" 1>&6
+echo "configure:7364: checking for pthread_create in -lpthread" >&5
+ac_lib_var=`echo pthread'_'pthread_create | sed 'y%./+-%__p_%'`
+if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ ac_save_LIBS="$LIBS"
+LIBS="-lpthread $LIBS"
+cat > conftest.$ac_ext <<EOF
+#line 7372 "configure"
+#include "confdefs.h"
+/* Override any gcc2 internal prototype to avoid an error. */
+/* We use char because int might match the return type of a gcc2
+ builtin and then its argument prototype would still apply. */
+char pthread_create();
+
+int main() {
+pthread_create()
+; return 0; }
+EOF
+if { (eval echo configure:7383: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+ rm -rf conftest*
+ eval "ac_cv_lib_$ac_lib_var=yes"
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ eval "ac_cv_lib_$ac_lib_var=no"
+fi
+rm -f conftest*
+LIBS="$ac_save_LIBS"
+
+fi
+if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
+ echo "$ac_t""yes" 1>&6
+ GL_LIBS="-lpthread"
+else
+ echo "$ac_t""no" 1>&6
+fi
+
+ fi
+
+
+ # If we have Mesa headers, check to see if we can link against -lMesaGL.
+ # If we don't have Mesa headers, or we don't have -lMesaGL, try -lGL.
+ # Else, warn that GL is busted. (We have the headers, but no libs.)
+ #
+
+ if test "$ac_have_mesa_gl" = yes ; then
+
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ ac_save_LDFLAGS="$LDFLAGS"
+# ac_save_LIBS="$LIBS"
+
+ if test \! -z "$includedir" ; then
+ CPPFLAGS="$CPPFLAGS -I$includedir"
+ fi
+ # note: $X_CFLAGS includes $x_includes
+ CPPFLAGS="$CPPFLAGS $X_CFLAGS"
+
+ if test \! -z "$libdir" ; then
+ LDFLAGS="$LDFLAGS -L$libdir"
+ fi
+ # note: $X_LIBS includes $x_libraries
+ LDFLAGS="$LDFLAGS $X_LIBS $X_EXTRA_LIBS"
+
+ echo $ac_n "checking for glXCreateContext in -lMesaGL""... $ac_c" 1>&6
+echo "configure:7430: checking for glXCreateContext in -lMesaGL" >&5
+ac_lib_var=`echo MesaGL'_'glXCreateContext | sed 'y%./+-%__p_%'`
+if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ ac_save_LIBS="$LIBS"
+LIBS="-lMesaGL -lMesaGLU $GL_LIBS -lX11 -lXext -lm $LIBS"
+cat > conftest.$ac_ext <<EOF
+#line 7438 "configure"
+#include "confdefs.h"
+/* Override any gcc2 internal prototype to avoid an error. */
+/* We use char because int might match the return type of a gcc2
+ builtin and then its argument prototype would still apply. */
+char glXCreateContext();
+
+int main() {
+glXCreateContext()
+; return 0; }
+EOF
+if { (eval echo configure:7449: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+ rm -rf conftest*
+ eval "ac_cv_lib_$ac_lib_var=yes"
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ eval "ac_cv_lib_$ac_lib_var=no"
+fi
+rm -f conftest*
+LIBS="$ac_save_LIBS"
+
+fi
+if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
+ echo "$ac_t""yes" 1>&6
+ gl_lib_1="MesaGL"
+ GL_LIBS="-lMesaGL -lMesaGLU $GL_LIBS"
+else
+ echo "$ac_t""no" 1>&6
+fi
+
+ CPPFLAGS="$ac_save_CPPFLAGS"
+ LDFLAGS="$ac_save_LDFLAGS"
+# LIBS="$ac_save_LIBS"
+
+ fi
+
+ if test "$gl_lib_1" = "" ; then
+
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ ac_save_LDFLAGS="$LDFLAGS"
+# ac_save_LIBS="$LIBS"
+
+ if test \! -z "$includedir" ; then
+ CPPFLAGS="$CPPFLAGS -I$includedir"
+ fi
+ # note: $X_CFLAGS includes $x_includes
+ CPPFLAGS="$CPPFLAGS $X_CFLAGS"
+
+ if test \! -z "$libdir" ; then
+ LDFLAGS="$LDFLAGS -L$libdir"
+ fi
+ # note: $X_LIBS includes $x_libraries
+ LDFLAGS="$LDFLAGS $X_LIBS $X_EXTRA_LIBS"
+
+ echo $ac_n "checking for glXCreateContext in -lGL""... $ac_c" 1>&6
+echo "configure:7495: checking for glXCreateContext in -lGL" >&5
+ac_lib_var=`echo GL'_'glXCreateContext | sed 'y%./+-%__p_%'`
+if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ ac_save_LIBS="$LIBS"
+LIBS="-lGL -lGLU $GL_LIBS -lX11 -lXext -lm $LIBS"
+cat > conftest.$ac_ext <<EOF
+#line 7503 "configure"
+#include "confdefs.h"
+/* Override any gcc2 internal prototype to avoid an error. */
+/* We use char because int might match the return type of a gcc2
+ builtin and then its argument prototype would still apply. */
+char glXCreateContext();
+
+int main() {
+glXCreateContext()
+; return 0; }
+EOF
+if { (eval echo configure:7514: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+ rm -rf conftest*
+ eval "ac_cv_lib_$ac_lib_var=yes"
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ eval "ac_cv_lib_$ac_lib_var=no"
+fi
+rm -f conftest*
+LIBS="$ac_save_LIBS"
+
+fi
+if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
+ echo "$ac_t""yes" 1>&6
+ gl_lib_1="GL"
+ GL_LIBS="-lGL -lGLU $GL_LIBS"
+else
+ echo "$ac_t""no" 1>&6
+fi
+
+ CPPFLAGS="$ac_save_CPPFLAGS"
+ LDFLAGS="$ac_save_LDFLAGS"
+# LIBS="$ac_save_LIBS"
+
+ fi
+
+ if test "$gl_lib_1" = "" ; then
+ # we have headers, but no libs -- bail.
+ have_gl=no
+ ac_have_mesa_gl=no
+ gl_halfassed=yes
+ else
+ # linking works -- we can build the GL hacks.
+ cat >> confdefs.h <<\EOF
+#define HAVE_GL 1
+EOF
+
+ if test "$ac_have_mesa_gl" = yes ; then
+ cat >> confdefs.h <<\EOF
+#define HAVE_MESA_GL 1
+EOF
+
+ fi
+ fi
+ fi
+
+
+ # Now that we know we have GL headers and libs, do some more GL testing.
+ #
+
+ if test "$have_gl" = yes ; then
+ # If it's MesaGL, we'd like to issue a warning if the version number
+ # is less than or equal to 2.6, because that version had a security bug.
+ #
+ if test "$ac_have_mesa_gl" = yes; then
+
+ echo $ac_n "checking MesaGL version number""... $ac_c" 1>&6
+echo "configure:7572: checking MesaGL version number" >&5
+if eval "test \"`echo '$''{'ac_cv_mesagl_version_string'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 7577 "configure"
+#include "confdefs.h"
+#include <GL/gl.h>
+configure: MESA_MAJOR_VERSION MESA_MINOR_VERSION
+EOF
+
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ if test \! -z "$includedir" ; then
+ CPPFLAGS="$CPPFLAGS -I$includedir"
+ fi
+ CPPFLAGS="$CPPFLAGS $X_CFLAGS"
+
+ # M4 sucks!!
+
+ mglv=`(eval "$ac_cpp conftest.$ac_ext") 2>&5 | sed -n \
+ 's/^configure:.*\([0-9][0-9]*\).*\([0-9][0-9]*\).*$/\1.\2/p'`
+
+
+ rm -f conftest.$ac_ext
+
+ CPPFLAGS="$ac_save_CPPFLAGS"
+
+ if test "$mglv" = ""; then
+ ac_mesagl_version=unknown
+ ac_mesagl_version_string=unknown
+ else
+ ac_mesagl_version_string=$mglv
+ maj=`echo $mglv | sed -n 's/\..*//p'`
+ min=`echo $mglv | sed -n 's/.*\.//p'`
+ ac_mesagl_version=`echo "$maj * 1000 + $min" | bc`
+ if test -z "$ac_mesagl_version"; then
+ ac_mesagl_version=unknown
+ ac_mesagl_version_string=unknown
+ fi
+ fi
+ ac_cv_mesagl_version=$ac_mesagl_version
+ ac_cv_mesagl_version_string=$ac_mesagl_version_string
+
+fi
+
+echo "$ac_t""$ac_cv_mesagl_version_string" 1>&6
+ ac_mesagl_version=$ac_cv_mesagl_version
+ ac_mesagl_version_string=$ac_cv_mesagl_version_string
+ fi
+
+
+ # Check for OpenGL 1.1 features.
+ #
+
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ ac_save_LDFLAGS="$LDFLAGS"
+# ac_save_LIBS="$LIBS"
+
+ if test \! -z "$includedir" ; then
+ CPPFLAGS="$CPPFLAGS -I$includedir"
+ fi
+ # note: $X_CFLAGS includes $x_includes
+ CPPFLAGS="$CPPFLAGS $X_CFLAGS"
+
+ if test \! -z "$libdir" ; then
+ LDFLAGS="$LDFLAGS -L$libdir"
+ fi
+ # note: $X_LIBS includes $x_libraries
+ LDFLAGS="$LDFLAGS $X_LIBS $X_EXTRA_LIBS"
+
+ echo $ac_n "checking for glBindTexture in -l$gl_lib_1""... $ac_c" 1>&6
+echo "configure:7643: checking for glBindTexture in -l$gl_lib_1" >&5
+ac_lib_var=`echo $gl_lib_1'_'glBindTexture | sed 'y%./+-%__p_%'`
+if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ ac_save_LIBS="$LIBS"
+LIBS="-l$gl_lib_1 $GL_LIBS -lX11 -lXext -lm $LIBS"
+cat > conftest.$ac_ext <<EOF
+#line 7651 "configure"
+#include "confdefs.h"
+/* Override any gcc2 internal prototype to avoid an error. */
+/* We use char because int might match the return type of a gcc2
+ builtin and then its argument prototype would still apply. */
+char glBindTexture();
+
+int main() {
+glBindTexture()
+; return 0; }
+EOF
+if { (eval echo configure:7662: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+ rm -rf conftest*
+ eval "ac_cv_lib_$ac_lib_var=yes"
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ eval "ac_cv_lib_$ac_lib_var=no"
+fi
+rm -f conftest*
+LIBS="$ac_save_LIBS"
+
+fi
+if eval "test \"`echo '$ac_cv_lib_'$ac_lib_var`\" = yes"; then
+ echo "$ac_t""yes" 1>&6
+ cat >> confdefs.h <<\EOF
+#define HAVE_GLBINDTEXTURE 1
+EOF
+
+else
+ echo "$ac_t""no" 1>&6
+true
+fi
+
+ CPPFLAGS="$ac_save_CPPFLAGS"
+ LDFLAGS="$ac_save_LDFLAGS"
+# LIBS="$ac_save_LIBS"
+
+ fi
+
+elif test "$with_gl" != no; then
+ echo "error: must be yes or no: --with-gl=$with_gl"
+ exit 1
+fi
+
+
+###############################################################################
+#
+# Check for -lgle.
projects / xscreensaver / blobdiff