+# Check for the SGI-VIDEO-CONTROL server extension header.
+#
+have_sgivc=no
+with_sgivc_req=unspecified
+# Check whether --with-sgivc-ext or --without-sgivc-ext was given.
+if test "${with_sgivc_ext+set}" = set; then
+ withval="$with_sgivc_ext"
+ with_sgivc="$withval"; with_sgivc_req="$withval"
+else
+ with_sgivc=yes
+fi
+
+if test $with_sgivc = yes; then
+
+ # first check for XSGIvc.h
+
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ if test \! -z "$includedir" ; then
+ CPPFLAGS="$CPPFLAGS -I$includedir"
+ fi
+ CPPFLAGS="$CPPFLAGS $X_CFLAGS"
+ ac_safe=`echo "X11/extensions/XSGIvc.h" | sed 'y%./+-%__p_%'`
+echo $ac_n "checking for X11/extensions/XSGIvc.h""... $ac_c" 1>&6
+echo "configure:3622: checking for X11/extensions/XSGIvc.h" >&5
+if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 3627 "configure"
+#include "confdefs.h"
+#include <X11/extensions/XSGIvc.h>
+EOF
+ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
+{ (eval echo configure:3632: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+ac_err=`grep -v '^ *+' conftest.out`
+if test -z "$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 "$ac_t""yes" 1>&6
+ have_sgivc=yes
+else
+ echo "$ac_t""no" 1>&6
+fi
+
+ CPPFLAGS="$ac_save_CPPFLAGS"
+
+ # if that succeeded, then check for the -lXsgivc
+ if test $have_sgivc = yes; then
+ have_sgivc=no
+
+ ac_save_CPPFLAGS="$CPPFLAGS"
+ ac_save_LDFLAGS="$LDFLAGS"
+ if test \! -z "$includedir" ; then
+ CPPFLAGS="$CPPFLAGS -I$includedir"
+ fi
+ if test \! -z "$includedir" ; then
+ CPPFLAGS="$CPPFLAGS -I$includedir"
+ fi
+ if test \! -z "$libdir" ; then
+ LDFLAGS="$LDFLAGS -L$libdir"
+ fi
+ CPPFLAGS="$CPPFLAGS $X_CFLAGS"
+ if test \! -z "$x_libraries" ; then
+ LDFLAGS="$LDFLAGS -L$x_libraries"
+ fi
+ echo $ac_n "checking for XSGIvcQueryGammaMap in -lXsgivc""... $ac_c" 1>&6
+echo "configure:3675: checking for XSGIvcQueryGammaMap in -lXsgivc" >&5
+ac_lib_var=`echo Xsgivc'_'XSGIvcQueryGammaMap | sed 'y%./+-%__p_%'`
+if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ ac_save_LIBS="$LIBS"
+LIBS="-lXsgivc -lXext -lX11 $LIBS"
+cat > conftest.$ac_ext <<EOF
+#line 3683 "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 XSGIvcQueryGammaMap();
+
+int main() {
+XSGIvcQueryGammaMap()
+; return 0; }
+EOF
+if { (eval echo configure:3694: \"$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
+ have_sgivc=yes; SAVER_LIBS="$SAVER_LIBS -lXsgivc"
+else
+ echo "$ac_t""no" 1>&6
+fi
+
+ CPPFLAGS="$ac_save_CPPFLAGS"
+ LDFLAGS="$ac_save_LDFLAGS"
+ fi
+
+ # if that succeeded, then we've really got it.
+ if test $have_sgivc = yes; then
+ cat >> confdefs.h <<\EOF
+#define HAVE_SGI_VC_EXTENSION 1
+EOF
+
+ fi
+
+elif test $with_sgivc != no; then
+ echo "error: must be yes or no: --with-sgivc-ext=$with_sgivc"
+ exit 1
+fi
+
+
+
+
+
+
+
+