I noticed that -Wshift-overflow isn't on by default even though now we're
defaulting to C++14. The reason is that at the time we set warn_shift_overflow
the cxx_dialect is still cxx_unset. So let's set the default C++ standard
earlier in that function, before be enable/disable the warnings.
(A two other patches are prerequisite before this may go in.)
Bootstrapped/regtested on x86_64-linux, ok for trunk?
2015-09-04 Marek Polacek <pola...@redhat.com>
* c-opts.c (c_common_post_options): Set C++ standard earlier, before
setting various warnings.
diff --git gcc/c-family/c-opts.c gcc/c-family/c-opts.c
index 3239a85..f358b62 100644
--- gcc/c-family/c-opts.c
+++ gcc/c-family/c-opts.c
@@ -800,6 +800,10 @@ c_common_post_options (const char **pfilename)
&& flag_no_builtin)
flag_tree_loop_distribute_patterns = 0;
+ /* Set C++ standard to C++14 if not specified on the command line. */
+ if (c_dialect_cxx () && cxx_dialect == cxx_unset)
+ set_std_cxx14 (/*ISO*/false);
+
/* -Woverlength-strings is off by default, but is enabled by -Wpedantic.
It is never enabled in C++, as the minimum limit is not normative
in that standard. */
@@ -887,10 +891,6 @@ c_common_post_options (const char **pfilename)
if (flag_abi_version == 0)
flag_abi_version = 10;
- /* Set C++ standard to C++14 if not specified on the command line. */
- if (c_dialect_cxx () && cxx_dialect == cxx_unset)
- set_std_cxx14 (/*ISO*/false);
-
if (cxx_dialect >= cxx11)
{
/* If we're allowing C++0x constructs, don't warn about C++98
Marek
