[Help] Error on cross-platform build using VM Linux (Ubuntu)

[sirrobzeroone]

I've been trying a few different ways to compile for windows, had a few successes and quiet a few fails.

I set up a virtual machine with a fresh ubuntu install and followed the instructions and everything seemed to compile okay until right at the end, then im seeing this output right at the end, I have no clue this error means and googling dosent reveal much except "bad". IS this somethign todo with using a virtual machine to compile a win64 build?

Thanks for any help or were to start looking.

edit im using - buildwin64.sh, ubuntu 64bit 20.04, Virtual box 6.1.

Code: Select all

[100%] Linking CXX executable ../../bin/minetest.exe
/usr/bin/x86_64-w64-mingw32-ld: CMakeFiles/minetest.dir/objects.a(event.cpp.obj):event.cpp:(.text+0x37): undefined reference to `std::condition_variable::wait(std::unique_lock<std::mutex>&)'
/usr/bin/x86_64-w64-mingw32-ld: CMakeFiles/minetest.dir/objects.a(event.cpp.obj):event.cpp:(.text+0xa5): undefined reference to `std::condition_variable::notify_one()'
/usr/bin/x86_64-w64-mingw32-ld: CMakeFiles/minetest.dir/objects.a(thread.cpp.obj):thread.cpp:(.text+0x22b): undefined reference to `std::thread::_M_start_thread(std::unique_ptr<std::thread::_State, std::default_delete<std::thread::_State> >, void (*)())'
/usr/bin/x86_64-w64-mingw32-ld: CMakeFiles/minetest.dir/objects.a(thread.cpp.obj):thread.cpp:(.text+0x335): undefined reference to `std::thread::join()'
/usr/bin/x86_64-w64-mingw32-ld: CMakeFiles/minetest.dir/objects.a(thread.cpp.obj):thread.cpp:(.text+0x5a1): undefined reference to `std::thread::hardware_concurrency()'
/usr/bin/x86_64-w64-mingw32-ld: CMakeFiles/minetest.dir/objects.a(thread.cpp.obj):thread.cpp:(.text$_ZNSt6thread11_State_implINS_8_InvokerISt5tupleIJPFvP6ThreadES4_EEEEED1Ev[_ZNSt6thread11_State_implINS_8_InvokerISt5tupleIJPFvP6ThreadES4_EEEEED1Ev]+0xb): undefined reference to `std::thread::_State::~_State()'
/usr/bin/x86_64-w64-mingw32-ld: CMakeFiles/minetest.dir/objects.a(thread.cpp.obj):thread.cpp:(.text$_ZNSt6thread11_State_implINS_8_InvokerISt5tupleIJPFvP6ThreadES4_EEEEED0Ev[_ZNSt6thread11_State_implINS_8_InvokerISt5tupleIJPFvP6ThreadES4_EEEEED0Ev]+0x14): undefined reference to `std::thread::_State::~_State()'
/usr/bin/x86_64-w64-mingw32-ld: CMakeFiles/minetest.dir/objects.a(emerge.cpp.obj):emerge.cpp:(.text+0x1c08): undefined reference to `std::condition_variable::~condition_variable()'
/usr/bin/x86_64-w64-mingw32-ld: CMakeFiles/minetest.dir/objects.a(emerge.cpp.obj):emerge.cpp:(.text+0x2563): undefined reference to `std::condition_variable::condition_variable()'
/usr/bin/x86_64-w64-mingw32-ld: CMakeFiles/minetest.dir/objects.a(emerge.cpp.obj):emerge.cpp:(.text+0x2772): undefined reference to `std::condition_variable::~condition_variable()'
/usr/bin/x86_64-w64-mingw32-ld: CMakeFiles/minetest.dir/objects.a(emerge.cpp.obj):emerge.cpp:(.text$_ZN12EmergeThreadD0Ev[_ZN12EmergeThreadD0Ev]+0x15a): undefined reference to `std::condition_variable::~condition_variable()'
/usr/bin/x86_64-w64-mingw32-ld: CMakeFiles/minetest.dir/objects.a(emerge.cpp.obj):emerge.cpp:(.text$_ZN12EmergeThreadD1Ev[_ZN12EmergeThreadD1Ev]+0x15a): undefined reference to `std::condition_variable::~condition_variable()'
/usr/bin/x86_64-w64-mingw32-ld: CMakeFiles/minetest.dir/objects.a(httpfetch.cpp.obj):httpfetch.cpp:(.text+0x2dca): undefined reference to `std::condition_variable::condition_variable()'
/usr/bin/x86_64-w64-mingw32-ld: CMakeFiles/minetest.dir/objects.a(httpfetch.cpp.obj):httpfetch.cpp:(.text+0x2e03): undefined reference to `std::condition_variable::~condition_variable()'
/usr/bin/x86_64-w64-mingw32-ld: CMakeFiles/minetest.dir/objects.a(httpfetch.cpp.obj):httpfetch.cpp:(.text+0x2ece): undefined reference to `std::condition_variable::~condition_variable()'
collect2: error: ld returned 1 exit status
make[2]: *** [src/CMakeFiles/minetest.dir/build.make:4667: ../bin/minetest.exe] Error 1
make[1]: *** [CMakeFiles/Makefile2:504: src/CMakeFiles/minetest.dir/all] Error 2
make: *** [Makefile:152: all] Error 2

[sfan5]

Ubuntu has two variants of MinGW gcc in its repos: x86_64-w64-mingw32-win32 and x86_64-w64-mingw32-gcc-posix.
The win32 variant is missing support for POSIX Threads, which Minetest needs. So you'll need to somehow make the buildscript use the "posix" one.

Editing the toolchain file used by the buildbot to say x86_64-w64-mingw32-gcc-posix and x86_64-w64-mingw32-g++-posix should work.

[sirrobzeroone]

Thanks Sfan, that fixed it.

Much easier to compile running VM linux than the other methods I've tried.