+##########################################
+# fcntl(F_FULLFSYNC) support
+if test "$fcntl_sync" != "yes" ; then
+ fcntl_sync="no"
+fi
+cat > $TMPC << EOF
+#include <unistd.h>
+#include <fcntl.h>
+
+int main(int argc, char **argv)
+{
+ return fcntl(0, F_FULLFSYNC);
+}
+EOF
+if compile_prog "" "" "fcntl(F_FULLFSYNC)" ; then
+ fcntl_sync="yes"
+fi
+print_config "fcntl(F_FULLFSYNC)" "$fcntl_sync"
+