https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116857
Bug ID: 116857
Summary: [15 Regression] libsupc++ build failure on mingw32:
libstdc++-v3/libsupc++/guard.cc:39:1: error:
declaration of 'int
__cxxabiv1::__cxa_guard_acquire(__guard*) noexcept'
has a different exception specifier
Product: gcc
Version: 15.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: slyfox at gcc dot gnu.org
Target Milestone: ---
Noticed the build failure today on `x86_64-w64-mingw32` target as:
> ../../../../source/libstdc++-v3/libsupc++/guard.cc:39:1: error:
declaration of 'int __cxxabiv1::__cxa_guard_acquire(__guard*) noexcept' has a
different exception specifier
> 39 | __cxa_guard_acquire (__guard* g) _GLIBCXX_NOTHROW
> | ^~~~~~~~~~~~~~~~~~~
> In file included from
../../../../source/libstdc++-v3/libsupc++/guard.cc:28:
> /build/source/libstdc++-v3/libsupc++/cxxabi.h:120:3: note: from
previous declaration 'int __cxxabiv1::__cxa_guard_acquire(__guard*)'
> 120 | __cxa_guard_acquire(__guard*);
> | ^~~~~~~~~~~~~~~~~~~
Looks like `__cxa_guard_acquire()` has exception mismatch:
cxxabi.h- int
cxxabi.h: __cxa_guard_acquire(__guard*);
guard.cc-extern "C" int
guard.cc:__cxa_guard_acquire (__guard* g) _GLIBCXX_NOTHROW
Should both have consistent _GLIBCXX_NOTHROW annotation? (or absence of both)
I'm not sure what change exposed the build failure.
