Link error in header-only mode (undefined reference to `to_string`)

[ldeng-ustc]

Just build the simplest example:

#include <iostream>
#include "boost/stacktrace/stacktrace.hpp"

using namespace std;
int main() {
	cout << boost::stacktrace::stacktrace() << endl;
	return 0;
}

And get the link error:

$ g++  test_stacktrace.cpp
/usr/bin/ld: /tmp/ccrbJANZ.o: in function `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > boost::stacktrace::to_string<std::allocator<boost::stacktrace::frame> >(boost::stacktrace::basic_stacktrace<std::allocator<boost::stacktrace::frame> > const&)':
test_stacktrace.cpp:(.text._ZN5boost10stacktrace9to_stringISaINS0_5frameEEEENSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKNS0_16basic_stacktraceIT_EE[_ZN5boost10stacktrace9to_stringISaINS0_5frameEEEENSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEERKNS0_16basic_stacktraceIT_EE]+0x7b): undefined reference to `boost::stacktrace::detail::to_string[abi:cxx11](boost::stacktrace::frame const*, unsigned long)'
collect2: error: ld returned 1 exit status

Add -ldl flag does not change any thing.

I have to build stacktrace library and add -DBOOST_STACKTRACE_LINK -lboost_stacktrace_backtrace -ldl -lbacktrace, but in document, stacktrack is header-only by defaults, so what's wrong?

I run these on Ubuntu 20.04 in WSL2, and gcc version 9.3.0, and boost version is 1.77.0. And I find similar issue in stackoverflow(ru)

$ wslfetch
Windows 10 Linux Subsystem                       
BUILD:    19043                                  
BRANCH:   vb_release                             
RELEASE:  Ubuntu 20.04.2 LTS                     
KERNEL:   Linux 5.10.16.3-microsoft-standard-WSL2

$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/9/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:hsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu 9.3.0-17ubuntu1~20.04' --with-bugurl=file:///usr/share/doc/gcc-9/README.Bugs --enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,gm2 --prefix=/usr --with-gcc-major-version-only --program-suffix=-9 --program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib --with-target-system-zlib=auto --enable-objc-gc=auto --enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic --enable-offload-targets=nvptx-none=/build/gcc-9-HskZEa/gcc-9-9.3.0/debian/tmp-nvptx/usr,hsa --without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 9.3.0 (Ubuntu 9.3.0-17ubuntu1~20.04)

[bgemmill]

I've been struggling with this too today. It looks like something changed with the b2 build process between boost 1.77 and 1.78. In trying to solve this problem, I tried to link to libboost_stacktrace_backtrace and found that it wasn't being copied out of b2 build's staging area either.

Since boost::stacktrace is supposed to be header only, a hack for now is to include the .ipp file for your unwinding implementation in one source file in your project, and then also globally defining which implementation to use.

In my case with libbacktrace:

 // put this in one source file
#include <boost/stacktrace/detail/frame_unwind.ipp>
// define this globally
BOOST_STACKTRACE_USE_BACKTRACE=1

and also link with libbacktrace and libdl

[apolukhin]

As a workaround include #include "boost/stacktrace.hpp" instead of #include "boost/stacktrace/stacktrace.hpp"

https://godbolt.org/z/KPTxaM1sn

Will fix the issue in a few days