diff options
| author | Stephan Bergmann <sbergman@redhat.com> | 2015-09-29 14:19:47 +0200 |
|---|---|---|
| committer | Stephan Bergmann <sbergman@redhat.com> | 2015-09-30 11:06:14 +0000 |
| commit | e26188145238572580b9af18fbde4b824b341046 (patch) | |
| tree | 5ab9a20b9c87b5bd4afb1f5610f45c4f99e99837 /config_host | |
| parent | 638b6d7e0b8740d53c88dcde0c2b743a2184ccfa (diff) | |
Avoid unhelpful -Wunused-variable
...at least from "g++ (GCC) 5.1.1 20150618 (Red Hat 5.1.1-4)" with
--disable-debug, when a namespace-scope const variable with a "complex"
initializer declared in an include file remains unused.
Avoid that warning via SAL_CONSTEXPR, which in turn requires large parts of
o3tl::is_typed_flags to be SAL_CONSTEXPR, which in turn requires a new
HAVE_CXX14_CONSTEXPR to allow assert in constexpr functions, which in turn
requires using -std=c++14 instead of -std=c++11 where available, which in turn
(a) requires to /not/ use -std=c++14 if it would run into a bug between Clang
and libstdc++ discussed at <https://llvm.org/bugs/show_bug.cgi?id=24115>
"llvm-nm fails to build with gcc 5.1's libstdc++" (and which hits us in
sfx2/source/control/thumbnailview.cxx), and (b) requires a new
HAVE_CXX14_SIZED_DEALLOCATION to work around GCC 5.1 -Werror=sized-deallocation
(where Clang >= 3.7 only supports C++14 sized deallocation when explictly
enabled via -fsized-deallocation, btw).
This effectively reverts ff6462e6307e6924dc6c8178043ae9032f4b4152 "avoid unused
variable warning:" again.
Change-Id: I424e3561452a3e6d8c8a9604d6c737cab49840c4
Reviewed-on: https://gerrit.libreoffice.org/18918
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>
Tested-by: Stephan Bergmann <sbergman@redhat.com>
Diffstat (limited to 'config_host')
| -rw-r--r-- | config_host/config_global.h.in | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/config_host/config_global.h.in b/config_host/config_global.h.in index a029ff53c7e7..b2aa4da9353d 100644 --- a/config_host/config_global.h.in +++ b/config_host/config_global.h.in @@ -17,6 +17,8 @@ Any change in this header will cause a rebuild of almost everything. #define HAVE_CXX11_FINAL 0 #define HAVE_CXX11_PERFECT_FORWARDING 0 #define HAVE_CXX11_CONSTEXPR 0 +#define HAVE_CXX14_CONSTEXPR 0 +#define HAVE_CXX14_SIZED_DEALLOCATION 0 #define HAVE_GCC_BUILTIN_ATOMIC 0 /* _Pragma */ #define HAVE_GCC_PRAGMA_OPERATOR 0 |