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* [gcc r13-7288] ibstdc++: Shut up -Wattribute-alias warning [PR109694]
@ 2023-05-04 7:44 Jakub Jelinek
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From: Jakub Jelinek @ 2023-05-04 7:44 UTC (permalink / raw)
To: gcc-cvs, libstdc++-cvs
https://gcc.gnu.org/g:addbe91570d7da35c48e6cf35b002a94a699fdd0
commit r13-7288-gaddbe91570d7da35c48e6cf35b002a94a699fdd0
Author: Jakub Jelinek <jakub@redhat.com>
Date: Tue May 2 10:58:19 2023 +0200
ibstdc++: Shut up -Wattribute-alias warning [PR109694]
I've followed what other files do, using attribute alias with not really
matching function type (after all, it isn't really possible when it is a
constructor), but seems I've missed it warns:
../../../../../libstdc++-v3/src/c++98/ios_init.cc:203:8: warning: ‘void std::ios_base_library_init()’ alias between functions of incompatible types ‘void()’ and ‘void
+(std::ios_base::Init::)()’ [-Wattribute-alias=]
203 | void ios_base_library_init (void)
| ^~~~~~~~~~~~~~~~~~~~~
../../../../../libstdc++-v3/src/c++98/ios_init.cc:78:3: note: aliased declaration here
78 | ios_base::Init::Init()
| ^~~~~~~~
The PR talks about clang++ warning there (which I think isn't really
supported, libstdc++ sources ought to be built by GCC), but it warns
when built with GCC too.
The following patch fixes it by doing what other libstdc++ sources do in
those cases.
2023-05-02 Jakub Jelinek <jakub@redhat.com>
PR libstdc++/109694
* src/c++98/ios_init.cc: Add #pragma GCC diagnostic ignored for
-Wattribute-alias.
(cherry picked from commit 87de39e4c3686535728f3a347f772e73af4cf262)
Diff:
---
libstdc++-v3/src/c++98/ios_init.cc | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libstdc++-v3/src/c++98/ios_init.cc b/libstdc++-v3/src/c++98/ios_init.cc
index 0c2ba945f36..ace94b992b5 100644
--- a/libstdc++-v3/src/c++98/ios_init.cc
+++ b/libstdc++-v3/src/c++98/ios_init.cc
@@ -200,6 +200,8 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
}
#ifdef _GLIBCXX_SYMVER_GNU
+#pragma GCC diagnostic ignored "-Wattribute-alias"
+
void ios_base_library_init (void)
__attribute__((alias ("_ZNSt8ios_base4InitC1Ev")));
#endif
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