Package: libstdc++-13-dev Version: 13.2.0-13 Severity: normal Dear maintainer,
I'm trying a stacktrace feature from C++23: g++-13 can compile my program because <stacktrace> is present, but fails to link with errors: undefined reference to `__glibcxx_backtrace_create_state' undefined reference to `__glibcxx_backtrace_pcinfo' undefined reference to `__glibcxx_backtrace_syminfo' undefined reference to `__glibcxx_backtrace_simple' Minimal working example can be found here (from cppreference.com): https://godbolt.org/z/8zc59Y1Wv Copy-paste it here: //g++ -std=c++23 -lstdc++_libbacktrace -O1 -Wall -o bt bt.cpp #include <stacktrace> #include <iostream> int nested_func(int c) { std::cout << std::stacktrace::current() << '\n'; return c + 1; } int func(int b) { return nested_func(b + 1); } int main() { std::cout << func(777); } I found that libstdc++_libbacktrace.a is absent even though libstdc++-13-dev is installed. I see that libstdc++-13-dev for other architectures include the support: lib32stdc++-13-dev: /usr/lib/gcc/x86_64-linux-gnu/13/32/libstdc++_libbacktrace.a libx32stdc++-13-dev: /usr/lib/gcc/x86_64-linux-gnu/13/x32/libstdc++_libbacktrace.a But there is no equivalent static library for the default x86_64 (amd64). It's very strange that 32 and x32 have it (even some GCC cross compilers ship it), but not the default. Also the supporting C library is already installed: libgcc-13-dev:amd64: /usr/lib/gcc/x86_64-linux-gnu/13/libbacktrace.a So it seems that most of the hard work (libbacktrace) is done, but the standard C++ part is missing. I guess the root cause is that --enable-backtrace was not present when building libstdc++-13-dev. I hope it can be easily fixed by just adding that extra argument to your build scripts. Thank you for the hard work and best regards, Marius -- System Information: Debian Release: trixie/sid APT prefers testing APT policy: (900, 'testing'), (500, 'stable-updates'), (500, 'stable'), (50, 'unstable') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 6.6.15-amd64 (SMP w/32 CPU threads; PREEMPT) Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE Locale: LANG=en_DK.UTF-8, LC_CTYPE=en_DK.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages libstdc++-13-dev depends on: ii gcc-13-base 13.2.0-13 ii libc6-dev 2.37-15 ii libgcc-13-dev 13.2.0-13 ii libstdc++6 14-20240201-3 libstdc++-13-dev recommends no packages. Versions of packages libstdc++-13-dev suggests: pn libstdc++-13-doc <none> -- debconf-show failed
