[ossia-score] Build issue with mingw64

[jcelerier]

Description / Steps to reproduce the issue

While trying to build my software, it fails with the mingw64 toolchain with the following error:

FAILED: score.exe 
C:\Windows\system32\cmd.exe /C "cd . && D:\a\_temp\msys64\mingw64\bin\c++.exe -Wa,-mbig-obj -O3 -DNDEBUG -mwindows @CMakeFiles\score.rsp -o score.exe -Wl,--out-implib,src\app\libscore.dll.a -Wl,--major-image-version,0,--minor-image-version,0 && cd ."

D:/a/_temp/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/14.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: 
3rdparty/libossia/src/libossia_x64.a(node_functions.cpp.obj):node_functions.cpp:(.text$_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE7reserveEy[_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE7reserveEy]+0x0): 
  multiple definition of `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::reserve(unsigned long long)'; 
    D:/a/_temp/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/14.2.0/../../../../lib/libstdc++.dll.a(libstdc___6_dll_d004526.o):(.text+0x0): first defined here

D:/a/_temp/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/14.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: 
3rdparty/libossia/src/libossia_x64.a(osc_factory.cpp.obj):osc_factory.cpp:(.text$_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6resizeEyc[_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6resizeEyc]+0x0): 
  multiple definition of `std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >::resize(unsigned long long, char)'; 
    D:/a/_temp/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/14.2.0/../../../../lib/libstdc++.dll.a(libstdc___6_dll_d004499.o):(.text+0x0): first defined here

in short, duplicate definitions of template functions that should have weak linkage (or whatever is the equivalent for PE, I forgot the exact name of the COMDAT thing). It looks like it would be related somehow to this issue: #6855

In particular, I am seeing this issue when building with mingw-w64 and ucrt64 :

• https://github.com/ossia/score/actions/runs/12033385114/job/33547432944
• https://github.com/ossia/score/actions/runs/12036911617/job/33559198474#step:5:6002

But not with clang64 which builds fine :

• https://github.com/ossia/score/actions/runs/12033385114/job/33547435703

Expected behavior

No duplicate symbol error for std::string::resize

Actual behavior

Duplicate symbol error for std::string::resize

Verification

• I have verified that my MSYS2 is up-to-date before submitting the report (see https://www.msys2.org/docs/updating/)

Windows Version

Github Actions image

MINGW environments affected

• MINGW64
• MINGW32
• UCRT64
• CLANG64
• CLANGARM64

Are you willing to submit a PR?

I can try !

[Kreijstal]

I guess this is a mingw-w64 bug?