In the release/2.3 branch we support gnu89, basically to keep
pre-2015 MSVC happy. Old gcc (<5) defaulted to gnu89. But
gcc 5+ and clang default to gnu11/c11. This patch makes our
gnu89 support explicit, such these newer compilers will also
point out gnu89 violations to developers.
v2: only set -std=gnu89 if no -std flag is present in $CFLAGS
Signed-off-by: Steffan Karger <stef...@karger.me>
---
configure.ac | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/configure.ac b/configure.ac
index 62b389e..af24392 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1069,6 +1069,12 @@ if test "${enable_pkcs11}" = "yes"; then
)
fi
+# Set -std=gnu89 unless user already specified a -std=
+case "${CFLAGS}" in
+ *-std=*) ;;
+ *) CFLAGS="${CFLAGS} -std=gnu89" ;;
+esac
+
if test "${enable_pedantic}" = "yes"; then
enable_strict="yes"
CFLAGS="${CFLAGS} -pedantic"
--
2.7.4
------------------------------------------------------------------------------
_______________________________________________
Openvpn-devel mailing list
Openvpn-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/openvpn-devel
