[PATCH xf86-video-r128 1/2] Fix for cross build failure

[Kevin Brace]

From: Helmut Grohne <helmut at subdivi.de>

configure.ac fails to cross build from source, because it abuses
AC_CHECK_FILE for finding headers. AC_CHECK_FILE is supposed to find
files on the host system. You cannot usually expect the host system
to have headers, so this use is incorrect. It happens to also break
cross compilation.

Signed-off-by: Helmut Grohne <helmut at subdivi.de>
---
 configure.ac | 28 ++++++++++++++++++++--------
 1 file changed, 20 insertions(+), 8 deletions(-)

diff --git a/configure.ac b/configure.ac
index 2abaf52..961d974 100644
--- a/configure.ac
+++ b/configure.ac
@@ -84,14 +84,26 @@ sdkdir=`$PKG_CONFIG --variable=sdkdir xorg-server`
 # Checks for libraries.
 
 if test "$DRI" != no; then
-	AC_CHECK_FILE([${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"])
-	AC_CHECK_FILE([${sdkdir}/damage.h],
-                      [have_damage_h="yes"], [have_damage_h="no"])
+	if test -f "${sdkdir}/dri.h"; then
+		have_dri_h="yes"
+	else
+		have_dri_h="no"
+	fi
+	if test -f "${sdkdir}/sarea.h"; then
+		have_sarea_h="yes"
+	else
+		have_sarea_h="no"
+	fi
+	if test -f "${sdkdir}/dristruct.h"; then
+		have_dristruct_h="yes"
+	else
+		have_dristruct_h="no"
+	fi
+	if test -f "${sdkdir}/damage.h"; then
+		have_damage_h="yes"
+	else
+		have_damage_h="no"
+	fi
 fi
 
 AC_MSG_CHECKING([whether to include DRI support])
-- 
2.7.4