FMT Visual Studio Linking error

[iharden]

I am trying to use fmt as a statically linked library in my project on Windows. Here is how I tried to install it:

1. Downloaded fmt-7.1.2 and go to fmt directory
   2. mkdir build
2. cd build
3. cmake -DCMAKE_POSITION_INDEPENDENT_CODE=TRUE .. This produces a FMT.sln in /build.
4. Open FMT.sln in VS and build ALL_BUILD (Release, x64). This works without errors.
5. This produces Release/fmt.lib
6. When I add fmt-7.1.2/build/Release to the VC++ library directories, I get the following Linking errors:

1>functions.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol ""void __cdecl fmt::v7::detail::assert_fail(char const *,int,char const *)" (?assert_fail@detail@v7@fmt@@YAXPEBDH0@Z)" in Funktion ""public: class fmt::v7::detail::buffer_appender<char> __cdecl fmt::v7::detail::arg_formatter_base<class fmt::v7::detail::buffer_appender<char>,char,struct fmt::v7::detail::error_handler>::operator()<float,0>(float)" (??$?RM$0A@@?$arg_formatter_base@V?$buffer_appender@D@detail@v7@fmt@@DUerror_handler@234@@detail@v7@fmt@@QEAA?AV?$buffer_appender@D@123@M@Z)".
1>functions.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol ""public: void __cdecl fmt::v7::detail::error_handler::on_error(char const *)" (?on_error@error_handler@detail@v7@fmt@@QEAAXPEBD@Z)" in Funktion ""void __cdecl fmt::v7::detail::check_pointer_type_spec<char,struct fmt::v7::detail::error_handler>(char,struct fmt::v7::detail::error_handler &&)" (??$check_pointer_type_spec@DUerror_handler@detail@v7@fmt@@@detail@v7@fmt@@YAXD$$QEAUerror_handler@012@@Z)".
1>functions.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol ""class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl fmt::v7::detail::vformat(class fmt::v7::basic_string_view<char>,struct fmt::v7::format_args)" (?vformat@detail@v7@fmt@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@V?$basic_string_view@D@23@Uformat_args@23@@Z)" in Funktion ""class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl fmt::v7::format<char [17],int &,int &,char>(char const (&)[17],int &,int &)" (??$format@$$BY0BB@DAEAHAEAHD@v7@fmt@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@AEAY0BB@$$CBDAEAH1@Z)".
1>functions.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol ""public: virtual __cdecl fmt::v7::format_error::~format_error(void)" (??1format_error@v7@fmt@@UEAA@XZ)" in Funktion ""public: unsigned int __cdecl fmt::v7::detail::printf_width_handler<char>::operator()<char,0>(char)" (??$?RD$0A@@?$printf_width_handler@D@detail@v7@fmt@@QEAAID@Z)".
1>functions.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol ""class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl fmt::v7::detail::grouping_impl<char>(class fmt::v7::detail::locale_ref)" (??$grouping_impl@D@detail@v7@fmt@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@Vlocale_ref@012@@Z)" in Funktion ""class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __cdecl fmt::v7::detail::grouping<char>(class fmt::v7::detail::locale_ref)" (??$grouping@D@detail@v7@fmt@@YA?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@Vlocale_ref@012@@Z)".
1>functions.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol ""char __cdecl fmt::v7::detail::thousands_sep_impl<char>(class fmt::v7::detail::locale_ref)" (??$thousands_sep_impl@D@detail@v7@fmt@@YADVlocale_ref@012@@Z)" in Funktion ""char __cdecl fmt::v7::detail::thousands_sep<char>(class fmt::v7::detail::locale_ref)" (??$thousands_sep@D@detail@v7@fmt@@YADVlocale_ref@012@@Z)".
1>functions.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol ""char __cdecl fmt::v7::detail::decimal_point_impl<char>(class fmt::v7::detail::locale_ref)" (??$decimal_point_impl@D@detail@v7@fmt@@YADVlocale_ref@012@@Z)" in Funktion ""char __cdecl fmt::v7::detail::decimal_point<char>(class fmt::v7::detail::locale_ref)" (??$decimal_point@D@detail@v7@fmt@@YADVlocale_ref@012@@Z)".
1>functions.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol ""int __cdecl fmt::v7::detail::format_float<double>(double,int,struct fmt::v7::detail::float_specs,class fmt::v7::detail::buffer<char> &)" (??$format_float@N@detail@v7@fmt@@YAHNHUfloat_specs@012@AEAV?$buffer@D@012@@Z)" in Funktion ""class fmt::v7::detail::buffer_appender<char> __cdecl fmt::v7::detail::write<char,class fmt::v7::detail::buffer_appender<char>,float,0>(class fmt::v7::detail::buffer_appender<char>,float,struct fmt::v7::basic_format_specs<char>,class fmt::v7::detail::locale_ref)" (??$write@DV?$buffer_appender@D@detail@v7@fmt@@M$0A@@detail@v7@fmt@@YA?AV?$buffer_appender@D@012@V3012@MU?$basic_format_specs@D@12@Vlocale_ref@012@@Z)".
1>functions.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol ""int __cdecl fmt::v7::detail::format_float<long double>(long double,int,struct fmt::v7::detail::float_specs,class fmt::v7::detail::buffer<char> &)" (??$format_float@O@detail@v7@fmt@@YAHOHUfloat_specs@012@AEAV?$buffer@D@012@@Z)" in Funktion ""class fmt::v7::detail::buffer_appender<char> __cdecl fmt::v7::detail::write<char,class fmt::v7::detail::buffer_appender<char>,long double,0>(class fmt::v7::detail::buffer_appender<char>,long double,struct fmt::v7::basic_format_specs<char>,class fmt::v7::detail::locale_ref)" (??$write@DV?$buffer_appender@D@detail@v7@fmt@@O$0A@@detail@v7@fmt@@YA?AV?$buffer_appender@D@012@V3012@OU?$basic_format_specs@D@12@Vlocale_ref@012@@Z)".
1>functions.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol ""int __cdecl fmt::v7::detail::snprintf_float<double>(double,int,struct fmt::v7::detail::float_specs,class fmt::v7::detail::buffer<char> &)" (??$snprintf_float@N@detail@v7@fmt@@YAHNHUfloat_specs@012@AEAV?$buffer@D@012@@Z)" in Funktion ""class fmt::v7::detail::buffer_appender<char> __cdecl fmt::v7::detail::write<char,class fmt::v7::detail::buffer_appender<char>,float,0>(class fmt::v7::detail::buffer_appender<char>,float,struct fmt::v7::basic_format_specs<char>,class fmt::v7::detail::locale_ref)" (??$write@DV?$buffer_appender@D@detail@v7@fmt@@M$0A@@detail@v7@fmt@@YA?AV?$buffer_appender@D@012@V3012@MU?$basic_format_specs@D@12@Vlocale_ref@012@@Z)".
1>functions.obj : error LNK2019: Verweis auf nicht aufgelöstes externes Symbol ""int __cdecl fmt::v7::detail::snprintf_float<long double>(long double,int,struct fmt::v7::detail::float_specs,class fmt::v7::detail::buffer<char> &)" (??$snprintf_float@O@detail@v7@fmt@@YAHOHUfloat_specs@012@AEAV?$buffer@D@012@@Z)" in Funktion ""class fmt::v7::detail::buffer_appender<char> __cdecl fmt::v7::detail::write<char,class fmt::v7::detail::buffer_appender<char>,long double,0>(class fmt::v7::detail::buffer_appender<char>,long double,struct fmt::v7::basic_format_specs<char>,class fmt::v7::detail::locale_ref)" (??$write@DV?$buffer_appender@D@detail@v7@fmt@@O$0A@@detail@v7@fmt@@YA?AV?$buffer_appender@D@012@V3012@OU?$basic_format_specs@D@12@Vlocale_ref@012@@Z)".
1>functions.obj : error LNK2001: Nicht aufgelöstes externes Symbol ""public: static unsigned int const * const fmt::v7::detail::basic_data<void>::zero_or_powers_of_10_32_new" (?zero_or_powers_of_10_32_new@?$basic_data@X@detail@v7@fmt@@2QBIB)".
1>functions.obj : error LNK2001: Nicht aufgelöstes externes Symbol ""public: static unsigned __int64 const * const fmt::v7::detail::basic_data<void>::zero_or_powers_of_10_64_new" (?zero_or_powers_of_10_64_new@?$basic_data@X@detail@v7@fmt@@2QB_KB)".
1>functions.obj : error LNK2001: Nicht aufgelöstes externes Symbol ""public: static char const (* fmt::v7::detail::basic_data<void>::digits)[2]" (?digits@?$basic_data@X@detail@v7@fmt@@2QAY01$$CBDA)".
1>functions.obj : error LNK2001: Nicht aufgelöstes externes Symbol ""public: static char const * const fmt::v7::detail::basic_data<void>::hex_digits" (?hex_digits@?$basic_data@X@detail@v7@fmt@@2QBDB)".
1>functions.obj : error LNK2001: Nicht aufgelöstes externes Symbol ""public: static char const * const fmt::v7::detail::basic_data<void>::signs" (?signs@?$basic_data@X@detail@v7@fmt@@2QBDB)".
1>functions.obj : error LNK2001: Nicht aufgelöstes externes Symbol ""public: static char const * const fmt::v7::detail::basic_data<void>::left_padding_shifts" (?left_padding_shifts@?$basic_data@X@detail@v7@fmt@@2QBDB)".
1>functions.obj : error LNK2001: Nicht aufgelöstes externes Symbol ""public: static char const * const fmt::v7::detail::basic_data<void>::right_padding_shifts" (?right_padding_shifts@?$basic_data@X@detail@v7@fmt@@2QBDB)".

Does anyone know how to solve this?

[vitaut]

Looks like the same as #2011.

[iharden]

Thanks a lot but this was not the issue, tested with fmt-7.1.3

[vitaut]

Then please post a complete example that reproduces the error.

[iharden]

I actually fixed this issue. The problem was that VS used x64. Switching to x86 solved the Linker errors.