+ ac_mesagl_version=$ac_cv_mesagl_version
+ ac_mesagl_version_string=$ac_cv_mesagl_version_string
+ echo "$ac_t""$ac_cv_mesagl_version_string" 1>&6
+ fi
+
+
+ # Check for OpenGL 1.1 features.
+ #
+
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ ac_save_LDFLAGS="$LDFLAGS"
+
+ 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"
+
+ echo $ac_n "checking for glBindTexture in -l$gl_lib_1""... $ac_c" 1>&6
+echo "configure:5406: checking for glBindTexture in -l$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 5414 "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:5425: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+ rm -rf conftest*
+ eval "ac_cv_lib_$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 "$ac_t""no" 1>&6
+fi
+
+ CPPFLAGS="$ac_save_CPPFLAGS"
+ LDFLAGS="$ac_save_LDFLAGS"
+
+ fi
+
+elif test "$with_gl" != no; then
+ echo "error: must be yes or no: --with-gl=$with_gl"
+ exit 1
+fi
+
+
+# check for SGI XReadDisplay server extension header.
+#
+have_readdisplay=no
+with_readdisplay_req=unspecified
+# Check whether --with-readdisplay or --without-readdisplay was given.
+if test "${with_readdisplay+set}" = set; then
+ withval="$with_readdisplay"
+ with_readdisplay="$withval"; with_readdisplay_req="$withval"
+else
+ with_readdisplay=yes
+fi
+
+
+
+ case "$with_readdisplay" in
+ yes) ;;
+ no) ;;
+
+ /*)
+ echo $ac_n "checking for XReadDisplay headers""... $ac_c" 1>&6
+echo "configure:5479: checking for XReadDisplay headers" >&5
+ d=$with_readdisplay/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 XReadDisplay libs""... $ac_c" 1>&6
+echo "configure:5489: checking for XReadDisplay libs" >&5
+ d=$with_readdisplay/lib
+ if test -d $d; then
+ X_LIBS="-L$d $X_LIBS"
+ echo "$ac_t""$d" 1>&6
+ else
+ echo "$ac_t""not found ($d: no such directory)" 1>&6
+ fi
+
+ # replace the directory string with "yes".
+ with_readdisplay_req="yes"
+ with_readdisplay=$with_readdisplay_req
+ ;;
+
+ *)
+ echo ""
+ echo "error: argument to --with-readdisplay 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
+
+ # why is this necessary?
+ # if we don't do this, then "./configure --with-motif=/usr/local/lesstif"
+ # behaves as if "--with-zippy=/usr/local/lesstif" was also present!
+ withval=
+
+
+if test "$with_readdisplay" = yes; then
+