configure: add endian check
Will remove guesswork and manual hacking in the OS headers.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/configure b/configure
index e45ae39..795c220 100755
--- a/configure
+++ b/configure
@@ -238,8 +238,25 @@
cc="${CC-${cross_prefix}gcc}"
+##########################################
+# check endianness
+bigendian="no"
+cat > $TMPC <<EOF
+#include <inttypes.h>
+int main(void)
+{
+ volatile uint32_t i=0x01234567;
+ return (*((uint8_t*)(&i))) == 0x67;
+}
+EOF
+if compile_prog "" "" "endian"; then
+ $TMPE && bigendian="yes"
+fi
+
+
echo "Operating system $targetos"
echo "CPU $cpu"
+echo "Big endian $bigendian"
echo "Compiler $cc"
echo
@@ -783,6 +800,11 @@
echo "Unknown wordsize!"
exit 1
fi
+if test "$bigendian" = "yes" ; then
+ echo "CONFIG_BIG_ENDIAN=y" >> $config_host_mak
+else
+ echo "CONFIG_LITTLE_ENDIAN=y" >> $config_host_mak
+fi
if test "$libaio" = "yes" ; then
echo "CONFIG_LIBAIO=y" >> $config_host_mak
fi