On Sun, 22 Jun 2025, 21:33 Jonas Kvinge via Gcc-help, <gcc-help@xxxxxxxxxxx> wrote: > Hi, > > Qt as of version 6.9 stopped working with winpthreads so I've switched > to building gcc with win32 threads (configure --enable-threads=win32). > But I'm getting a crash on program exit which was not there with > winpthreads, but I can't get debug symbols to show for libstdc++. > I've built gcc with --enable-libstdcxx-debug, and used libstdc++-6.dll > from the debug directory. > That is an unoptimized build of libstdc++ but should not be necessary to get debug symbols. Libstdc++ should always be built with debug symbols. I've added -D_GLIBCXX_DEBUG to CXXFLAGS for both Qt and the program, > still see no debug symbols for libstdc++. > That macro enables runtime assertions in libstdc++ functions and has absolutely nothing to do with debug symbols. I'm cross-compiling using gcc 15.1.0 and mingw-w64 12.0.0. > > Thread 1 received signal SIGSEGV, Segmentation fault. > 0x00007ffd8d3b6b67 in ?? () from C:\Program Files\Strawberry Music > Player Debug\libstdc++-6.dll > (gdb) bt > #0 0x00007ffd8d3b6b67 in ?? () from C:\Program Files\Strawberry Music > Player Debug\libstdc++-6.dll > #1 0x00007ffdda8e42d6 in ucrtbase!_execute_onexit_table () from > C:\WINDOWS\System32\ucrtbase.dll > #2 0x00007ffdda8e41fb in ucrtbase!_execute_onexit_table () from > C:\WINDOWS\System32\ucrtbase.dll > #3 0x00007ffdda8e41b4 in ucrtbase!_execute_onexit_table () from > C:\WINDOWS\System32\ucrtbase.dll > #4 0x00007ffd8d39114c in ?? () from C:\Program Files\Strawberry Music > Player Debug\libstdc++-6.dll > #5 0x00007ffd8d391226 in ?? () from C:\Program Files\Strawberry Music > Player Debug\libstdc++-6.dll > #6 0x00007ffddcc69a1d in ntdll!RtlActivateActivationContextUnsafeFast > () from C:\WINDOWS\SYSTEM32\ntdll.dll > #7 0x00007ffddccaf1ca in ntdll!LdrShutdownProcess () from > C:\WINDOWS\SYSTEM32\ntdll.dll > #8 0x00007ffddccaef7d in ntdll!RtlExitUserProcess () from > C:\WINDOWS\SYSTEM32\ntdll.dll > #9 0x00007ffddad4e3eb in KERNEL32!FatalExit () from > C:\WINDOWS\System32\kernel32.dll > #10 0x00007ffdda8f05bc in ucrtbase!exit () from > C:\WINDOWS\System32\ucrtbase.dll > #11 0x00007ffdda8f045f in ucrtbase!exit () from > C:\WINDOWS\System32\ucrtbase.dll > #12 0x00007ff7aaf413df in __tmainCRTStartup () at ../gcc- > 15.1.0.build_/mingw-w64-v12.0.0/mingw-w64-crt/crt/crtexe.c:269 > #13 0x00007ff7aaf41416 in mainCRTStartup () at ../gcc- > 15.1.0.build_/mingw-w64-v12.0.0/mingw-w64-crt/crt/crtexe.c:188 > > Jonas > > > > > > > > > > > > > > > > > > > > > > > > >
