Cannot build tests with cross-compiler (Ubuntu/MXE)

[ambitslix]

Trying to build under MXE shared:

Linking CXX executable ../bin/os-test.exe
cd /build/Linux_x86_64_Debug_x86_64-w64-mingw32.shared-cross-compiler/submodules/fmt/test && /mxe/usr/x86_64-pc-linux-gnu/bin/cmake -E cmake_link_script CMakeFiles/os-test.dir/link.txt --verbose=1
/mxe/usr/x86_64-pc-linux-gnu/bin/cmake -E remove -f CMakeFiles/os-test.dir/objects.a
/mxe/usr/bin/x86_64-w64-mingw32.shared-ar cr CMakeFiles/os-test.dir/objects.a @CMakeFiles/os-test.dir/objects1.rsp
/mxe/usr/x86_64-pc-linux-gnu/bin/x86_64-w64-mingw32.shared-g++ -g   -Wl,--whole-archive CMakeFiles/os-test.dir/objects.a -Wl,--no-whole-archive  -o ../bin/os-test.exe -Wl,--out-implib,libos-test.dll.a -Wl,--major-image-version,0,--minor-image-version,0 @CMakeFiles/os-test.dir/linklibs.rsp
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj): In function `fmt::v6::internal::count_digits(unsigned long long)':
/submodules/fmt/include/fmt/format.h:762: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE23zero_or_powers_of_10_64E'
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj): In function `fmt::v6::internal::count_digits(unsigned int)':
/submodules/fmt/include/fmt/format.h:820: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE23zero_or_powers_of_10_32E'
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj): In function `void fmt::v6::internal::basic_writer<fmt::v6::buffer_range<char> >::write<float, 0>(float, fmt::v6::basic_format_specs<char>)':
/submodules/fmt/include/fmt/format.h:1708: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE5signsE'
/submodules/fmt/include/fmt/format.h:1717: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE5signsE'
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj): In function `void fmt::v6::internal::basic_writer<fmt::v6::buffer_range<char> >::write<double, 0>(double, fmt::v6::basic_format_specs<char>)':
/submodules/fmt/include/fmt/format.h:1708: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE5signsE'
/submodules/fmt/include/fmt/format.h:1717: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE5signsE'
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj): In function `void fmt::v6::internal::basic_writer<fmt::v6::buffer_range<char> >::write<long double, 0>(long double, fmt::v6::basic_format_specs<char>)':
/submodules/fmt/include/fmt/format.h:1708: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE5signsE'
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj):/submodules/fmt/include/fmt/format.h:1717: more undefined references to `__imp__ZN3fmt2v68internal10basic_dataIvE5signsE' follow
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj): In function `fmt::v6::internal::counting_iterator fmt::v6::internal::write_exponent<char, fmt::v6::internal::counting_iterator>(int, fmt::v6::internal::counting_iterator)':
/submodules/fmt/include/fmt/format.h:1061: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE6digitsE'
/submodules/fmt/include/fmt/format.h:1066: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE6digitsE'
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj): In function `char* fmt::v6::internal::format_uint<4u, char, unsigned long long>(char*, unsigned long long, int, bool)':
/submodules/fmt/include/fmt/format.h:907: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE10hex_digitsE'
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj): In function `char* fmt::v6::internal::format_decimal<unsigned int, char, char* fmt::v6::internal::format_decimal<char, char*, unsigned int>(char*, unsigned int, int)::{lambda(char*)#1}>(char* fmt::v6::internal::format_decimal<char, char*, unsigned int>(char*, unsigned int, int)::{lambda(char*)#1}, unsigned int, int, char* fmt::v6::internal::format_decimal<char, char*, unsigned int>(char*, unsigned int, int)::{lambda(char*)#1})':
/submodules/fmt/include/fmt/format.h:863: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE6digitsE'
/submodules/fmt/include/fmt/format.h:865: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE6digitsE'
/submodules/fmt/include/fmt/format.h:873: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE6digitsE'
/submodules/fmt/include/fmt/format.h:875: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE6digitsE'
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj): In function `char* fmt::v6::internal::format_decimal<unsigned long long, char, char* fmt::v6::internal::format_decimal<char, char*, unsigned long long>(char*, unsigned long long, int)::{lambda(char*)#1}>(char* fmt::v6::internal::format_decimal<char, char*, unsigned long long>(char*, unsigned long long, int)::{lambda(char*)#1}, unsigned long long, int, char* fmt::v6::internal::format_decimal<char, char*, unsigned long long>(char*, unsigned long long, int)::{lambda(char*)#1})':
/submodules/fmt/include/fmt/format.h:863: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE6digitsE'
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj):/submodules/fmt/include/fmt/format.h:865: more undefined references to `__imp__ZN3fmt2v68internal10basic_dataIvE6digitsE' follow
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj): In function `char* fmt::v6::internal::format_uint<4u, char, unsigned int>(char*, unsigned int, int, bool)':
/submodules/fmt/include/fmt/format.h:907: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE10hex_digitsE'
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj): In function `char* fmt::v6::internal::format_uint<1u, char, unsigned int>(char*, unsigned int, int, bool)':
/submodules/fmt/include/fmt/format.h:907: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE10hex_digitsE'
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj): In function `char* fmt::v6::internal::format_uint<3u, char, unsigned int>(char*, unsigned int, int, bool)':
/submodules/fmt/include/fmt/format.h:907: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE10hex_digitsE'
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj): In function `char* fmt::v6::internal::format_uint<1u, char, unsigned long long>(char*, unsigned long long, int, bool)':
/submodules/fmt/include/fmt/format.h:907: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE10hex_digitsE'
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj): In function `char* fmt::v6::internal::format_uint<3u, char, unsigned long long>(char*, unsigned long long, int, bool)':
/submodules/fmt/include/fmt/format.h:907: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE10hex_digitsE'
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj):/submodules/fmt/include/fmt/format.h:907: more undefined references to `__imp__ZN3fmt2v68internal10basic_dataIvE10hex_digitsE' follow
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj): In function `char* fmt::v6::internal::format_decimal<unsigned int, char, void fmt::v6::internal::basic_writer<fmt::v6::buffer_range<char> >::int_writer<int, fmt::v6::basic_format_specs<char> >::num_writer::operator()<char*&>(char*&) const::{lambda(char*&)#1}>(char, unsigned int, int, void fmt::v6::internal::basic_writer<fmt::v6::buffer_range<char> >::int_writer<int, fmt::v6::basic_format_specs<char> >::num_writer::operator()<char*&>(char*&) const::{lambda(char*&)#1})':
/submodules/fmt/include/fmt/format.h:863: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE6digitsE'
/submodules/fmt/include/fmt/format.h:865: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE6digitsE'
/submodules/fmt/include/fmt/format.h:873: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE6digitsE'
/submodules/fmt/include/fmt/format.h:875: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE6digitsE'
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj): In function `char* fmt::v6::internal::format_decimal<unsigned int, char, void fmt::v6::internal::basic_writer<fmt::v6::buffer_range<char> >::int_writer<unsigned int, fmt::v6::basic_format_specs<char> >::num_writer::operator()<char*&>(char*&) const::{lambda(char*&)#1}>(char, unsigned int, int, void fmt::v6::internal::basic_writer<fmt::v6::buffer_range<char> >::int_writer<unsigned int, fmt::v6::basic_format_specs<char> >::num_writer::operator()<char*&>(char*&) const::{lambda(char*&)#1})':
/submodules/fmt/include/fmt/format.h:863: undefined reference to `__imp__ZN3fmt2v68internal10basic_dataIvE6digitsE'
CMakeFiles/os-test.dir/objects.a(os-test.cc.obj):/submodules/fmt/include/fmt/format.h:865: more undefined references to `__imp__ZN3fmt2v68internal10basic_dataIvE6digitsE' follow
collect2: error: ld returned 1 exit status
make[3]: *** [test/CMakeFiles/os-test.dir/build.make:90: bin/os-test.exe] Error 1
make[3]: Leaving directory '/build/Linux_x86_64_Debug_x86_64-w64-mingw32.shared-cross-compiler/submodules/fmt'
make[2]: *** [CMakeFiles/Makefile2:213: test/CMakeFiles/os-test.dir/all] Error 2
make[2]: Leaving directory '/build/Linux_x86_64_Debug_x86_64-w64-mingw32.shared-cross-compiler/submodules/fmt'
make[1]: *** [CMakeFiles/Makefile2:225: test/CMakeFiles/os-test.dir/rule] Error 2
make[1]: Leaving directory '/build/Linux_x86_64_Debug_x86_64-w64-mingw32.shared-cross-compiler/submodules/fmt'
make: *** [Makefile:223: os-test] Error 2

cat test/CMakeFiles/os-test.dir/linklibs.rsp 
-static-libgcc -static-libstdc++ libtest-main.a libgmock.a ../libfmtd.dll.a -lkernel32 -luser32 -lgdi32 -lwinspool -lshell32 -lole32 -loleaut32 -luuid -lcomdlg32 -ladvapi32

It builds with static with adding to CMakeLists.txt:

add_definitions("-Wa,-mbig-obj")

Any clues?

[vitaut]

Any clues?

No but I recommend using a static library.

[vitaut]

Closing as there are no plans to support this build configuration but a PR would be welcome.

[VasiliPupkin256]

@ambitslix interesting that -mbig-obj helped in your case, usually it is used to overcome 'File too big' error like described here assimp/assimp#2067 for example. Are you sure that it was -mbig-obj that solved the issue? This switch is conflicting with -flto switch and in turns cause problems compiling projects using link time/whole program optimization. I am considering to remove -mbig-obj from the default compilation switches again and do not want to break anything.