configure: check for sync-nand

Check whether gcc support this flag.
Some older compilers (gcc version 4.3.2) miss it.

1 files changed, 39 insertions, 0 deletions

diff --git a/configure b/configure
index c5c3b856f..d85e7c977 100755
--- a/configure
+++ b/configure
@@ -749,6 +749,7 @@ CUNIT_CFLAGS
 GENPNG
 GENHTML
 LCOV
+HAVE_WSYNCNAND
 HAVE_WCLOBBERED
 HAVE_WJUMP
 SACKPT_LIBS
@@ -10214,6 +10215,44 @@ $as_echo "$ac_cv_flag_HAVE_WCLOBBERED" >&6; }
 
 
 
+
+    ac_save_CFLAGS=$CFLAGS
+    CFLAGS=-Wsync-nand
+    { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $CC accepts -Wsync-nand flag" >&5
+$as_echo_n "checking whether $CC accepts -Wsync-nand flag... " >&6; }
+if ${ac_cv_flag_HAVE_WSYNCNAND+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  ac_cv_flag_HAVE_WSYNCNAND=yes
+else
+  ac_cv_flag_HAVE_WSYNCNAND=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_flag_HAVE_WSYNCNAND" >&5
+$as_echo "$ac_cv_flag_HAVE_WSYNCNAND" >&6; }
+    CFLAGS=$ac_save_CFLAGS
+    HAVE_WSYNCNAND=$ac_cv_flag_HAVE_WSYNCNAND
+    if test "HAVE_WSYNCNAND" = yes; then
+        :
+    else
+        :
+    fi
+
+
+
 ################################################################################
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for C optimisation flag" >&5
 $as_echo_n "checking for C optimisation flag... " >&6; }