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libstdc++: Use visibility pragmas instead of attributes [PR104807]

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The _GLIBCXX_PSEUDO_VISIBILITY macro isn't defined until after including
os_defines.h, so we can't use _GLIBCXX_VISIBILITY early in c++config.
Replace the uses of that macro with #pragma visibility push(default)
instead.

libstdc++-v3/ChangeLog:

	PR libstdc++/104807
	* include/bits/c++config (__terminate, __glibcxx_assert_fail):
	Replace _GLIBCXX_VISIBILITY on function with visibility pragma.
	(__is_constant_evaluated): Add visibility pragma.
This commit is contained in:
Jonathan Wakely 2022-03-07 15:07:05 +00:00
parent 111754595c
commit 4cb935cb69
1 changed files with 7 additions and 2 deletions
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9
libstdc++-v3/include/bits/c++config
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@ -302,15 +302,16 @@ namespace std
typedef decltype(nullptr) nullptr_t;
#endif
#pragma GCC visibility push(default)
// This allows the library to terminate without including all of <exception>
// and without making the declaration of std::terminate visible to users.
extern "C++" __attribute__ ((__noreturn__, __always_inline__))
_GLIBCXX_VISIBILITY(default)
inline void __terminate() _GLIBCXX_USE_NOEXCEPT
{
void terminate() _GLIBCXX_USE_NOEXCEPT __attribute__ ((__noreturn__));
terminate();
}
#pragma GCC visibility pop
}
#define _GLIBCXX_USE_DUAL_ABI
@ -506,6 +507,7 @@ namespace std
namespace std
{
#pragma GCC visibility push(default)
// Internal version of std::is_constant_evaluated().
// This can be used without checking if the compiler supports the feature.
// The macro _GLIBCXX_HAVE_IS_CONSTANT_EVALUATED can be used to check if
@ -523,6 +525,7 @@ namespace std
return false;
#endif
}
#pragma GCC visibility pop
}
// Debug Mode implies checking assertions.
@ -553,13 +556,15 @@ namespace std
# ifdef _GLIBCXX_VERBOSE_ASSERT
namespace std
{
#pragma GCC visibility push(default)
// Avoid the use of assert, because we're trying to keep the <cassert>
// include out of the mix.
extern "C++" _GLIBCXX_NORETURN _GLIBCXX_VISIBILITY(default)
extern "C++" _GLIBCXX_NORETURN
void
__glibcxx_assert_fail(const char* __file, int __line,
const char* __function, const char* __condition)
_GLIBCXX_NOEXCEPT;
#pragma GCC visibility pop
}
#define __glibcxx_assert_impl(_Condition) \
if (__builtin_expect(!bool(_Condition), false)) \