X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=configure;h=152c8ed24a97d24ddf74a60ffa670c0aa7d94133;hb=4d9d6e20e19c1aaa0d138e70897d136b36d673c0;hp=43de16e885044aaede33ad0150f872308ca93a1a;hpb=e4499269be39b8c72f7ec33ccfc6a8b5db7830d4;p=secnet.git

diff --git a/configure b/configure
index 43de16e..152c8ed 100755
--- a/configure
+++ b/configure
@@ -4132,6 +4132,54 @@ fi
 done
 
 
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking required gcc -std flag" >&5
+$as_echo_n "checking required gcc -std flag... " >&6; }
+if ${secnet_cv_gcc_std_flag+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+
+    secnet_cv_gcc_std_flag=""
+    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+void x(void) { for (int i=0; i<1; i++) { } }
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+else
+
+        old_cflags="$CFLAGS"
+	CFLAGS="$CFLAGS -std=gnu11"
+	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+void x(void) { for (int i=0; i<1; i++) { } }
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+	    secnet_cv_gcc_std_flag=" -std=gnu11"
+
+else
+
+	    { $as_echo "$as_me:${as_lineno-$LINENO}: result: failure!" >&5
+$as_echo "failure!" >&6; }
+	    as_fn_error 1 "cannot get test program to compile" "$LINENO" 5
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+	CFLAGS="$old_cflags"
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $secnet_cv_gcc_std_flag" >&5
+$as_echo "$secnet_cv_gcc_std_flag" >&6; }
+CFLAGS="$CFLAGS$secnet_cv_gcc_std_flag"
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: Checking requirements for IPv6 support..." >&5
 $as_echo "$as_me: Checking requirements for IPv6 support..." >&6;}
 enable_ipv6=true