[PATCH] xf86-video-xgi: fix configure for cross-compiling

[Wolfram Sang]

Similar to 97a4e747bfac14f34646c55ddf639e8fe22f2f55 in xf86-video-ati.

Signed-off-by: Wolfram Sang <w.sang at pengutronix.de>
---
 configure.ac |   20 +++++++++++++-------
 1 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/configure.ac b/configure.ac
index 0116265..7884b28 100644
--- a/configure.ac
+++ b/configure.ac
@@ -78,12 +78,19 @@ sdkdir=`$PKG_CONFIG --variable=sdkdir xorg-server`
 # Checks for libraries.
 
 if test "x$DRI" = xauto; then
-        AC_CHECK_FILE([${sdkdir}/dri.h],
-                      [have_dri_h="yes"], [have_dri_h="no"])
-        AC_CHECK_FILE([${sdkdir}/sarea.h],
-                      [have_sarea_h="yes"], [have_sarea_h="no"])
-        AC_CHECK_FILE([${sdkdir}/dristruct.h],
-                      [have_dristruct_h="yes"], [have_dristruct_h="no"])
+	PKG_CHECK_MODULES(DRI, [libdrm >= 2.0 xf86driproto glproto])
+	save_CPPFLAGS="$CPPFLAGS"
+	CPPFLAGS="$XORG_CFLAGS $DRI_CFLAGS"
+	AC_CHECK_HEADER([dri.h],
+                      [have_dri_h="yes"], [have_dri_h="no"],[-])
+	AC_CHECK_HEADER([sarea.h],
+                      [have_sarea_h="yes"], [have_sarea_h="no"],[-])
+	AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[
+#include <xorg-server.h>
+#include <dristruct.h>
+                      ]])],
+                      [have_dristruct_h="yes"], [have_dristruct_h="no"],[-])
+	CPPFLAGS="$save_CPPFLAGS"
 fi
 
 AC_MSG_CHECKING([whether to include DRI support])
@@ -100,7 +107,6 @@ AC_MSG_RESULT([$DRI])
 
 AM_CONDITIONAL(DRI, test "x$DRI" = xyes)
 if test "x$DRI" = xyes; then
-        PKG_CHECK_MODULES(DRI, [libdrm >= 2.0 xf86driproto glproto])
         AC_DEFINE(XF86DRI,1,[Enable DRI driver support])
         AC_DEFINE(XF86DRI_DEVEL,1,[Enable developmental DRI driver support])
 fi
-- 
1.7.2.3