Build error

[MyHubTo]

when i first build this project as following commands:

1. git clone https://github.com/fmtlib/fmt.git
2. mkdir build
3. cd build
4. cmake ..
5. make

but some errors occurred :
(base) mrzhao@mrzhao-haier-dt:/Desktop/fmt/build$ cmake ..
-- CMake version: 3.20.20210413-g4bfe724
-- The CXX compiler identification is GNU 5.4.0
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /usr/bin/c++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Module support is disabled.
-- Version: 8.0.1
-- Build type: Release
-- CXX_STANDARD: 11
-- Performing Test has_std_11_flag
-- Performing Test has_std_11_flag - Success
-- Performing Test has_std_0x_flag
-- Performing Test has_std_0x_flag - Success
-- Performing Test SUPPORTS_USER_DEFINED_LITERALS
-- Performing Test SUPPORTS_USER_DEFINED_LITERALS - Success
-- Performing Test FMT_HAS_VARIANT
-- Performing Test FMT_HAS_VARIANT - Failed
-- Required features: cxx_variadic_templates
-- Looking for strtod_l
-- Looking for strtod_l - found
-- Target 'doc' disabled (requires doxygen)
-- Looking for C++ include pthread.h
-- Looking for C++ include pthread.h - found
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Failed
-- Looking for pthread_create in pthreads
-- Looking for pthread_create in pthreads - not found
-- Looking for pthread_create in pthread
-- Looking for pthread_create in pthread - found
-- Found Threads: TRUE
-- Performing Test HAVE_FNO_DELETE_NULL_POINTER_CHECKS
-- Performing Test HAVE_FNO_DELETE_NULL_POINTER_CHECKS - Success
-- FMT_PEDANTIC: OFF
-- Configuring done
-- Generating done
-- Build files have been written to: /home/mrzhao/Desktop/fmt/build
(base) mrzhao@mrzhao-haier-dt:/Desktop/fmt/build$ make
[ 1%] Building CXX object CMakeFiles/fmt.dir/src/format.cc.o
In file included from /home/mrzhao/Desktop/fmt/include/fmt/format-inl.h:29:0,
from /home/mrzhao/Desktop/fmt/src/format.cc:8:
/home/mrzhao/Desktop/fmt/include/fmt/format.h: In instantiation of ‘constexpr Char fmt::v8::detail::sign(Sign) [with Char = char; Sign = unsigned char]’:
/home/mrzhao/Desktop/fmt/include/fmt/format.h:1673:41: required from ‘fmt::v8::detail::write_nonfinite(OutputIt, bool, fmt::v8::basic_format_specs, const fmt::v8::detail::float_specs&)::<lambda(fmt::v8::detail::reserve_iterator)> [with Char = char; OutputIt = fmt::v8::appender; fmt::v8::detail::reserve_iterator = fmt::v8::appender]’
/home/mrzhao/Desktop/fmt/include/fmt/format.h:1674:27: required from ‘struct fmt::v8::detail::write_nonfinite(OutputIt, bool, fmt::v8::basic_format_specs, const fmt::v8::detail::float_specs&) [with Char = char; OutputIt = fmt::v8::appender]::<lambda(fmt::v8::detail::reserve_iteratorfmt::v8::appender)>’
/home/mrzhao/Desktop/fmt/include/fmt/format.h:1672:22: required from ‘OutputIt fmt::v8::detail::write_nonfinite(OutputIt, bool, fmt::v8::basic_format_specs, const fmt::v8::detail::float_specs&) [with Char = char; OutputIt = fmt::v8::appender]’
/home/mrzhao/Desktop/fmt/include/fmt/format.h:2032:27: required from ‘OutputIt fmt::v8::detail::write(OutputIt, T) [with Char = char; OutputIt = fmt::v8::appender; T = float; typename std::enable_if<fmt::v8::detail::is_fast_float::value, int>::type = 0]’
/home/mrzhao/Desktop/fmt/include/fmt/format.h:2175:23: required from ‘fmt::v8::detail::default_arg_formatter::iterator fmt::v8::detail::default_arg_formatter::operator()(T) [with T = float; Char = char; fmt::v8::detail::default_arg_formatter::iterator = fmt::v8::appender]’
/home/mrzhao/Desktop/fmt/include/fmt/core.h:1564:15: required from ‘decltype (vis(0)) fmt::v8::visit_format_arg(Visitor&&, const fmt::v8::basic_format_arg&) [with Visitor = fmt::v8::detail::default_arg_formatter; Context = fmt::v8::basic_format_context<fmt::v8::appender, char>; decltype (vis(0)) = fmt::v8::appender]’
/home/mrzhao/Desktop/fmt/include/fmt/format.h:2908:21: required from ‘void fmt::v8::detail::vformat_to(fmt::v8::detail::buffer&, fmt::v8::basic_string_view, fmt::v8::basic_format_args<fmt::v8::basic_format_context<typename std::conditional<std::is_same<typename fmt::v8::type_identity::type, char>::value, fmt::v8::appender, std::back_insert_iterator<fmt::v8::detail::buffer<typename fmt::v8::type_identity::type> > >::type, typename fmt::v8::type_identity::type> >, fmt::v8::detail::locale_ref) [with Char = char; typename fmt::v8::type_identity::type = char; typename std::conditional<std::is_same<typename fmt::v8::type_identity::type, char>::value, fmt::v8::appender, std::back_insert_iterator<fmt::v8::detail::buffer<typename fmt::v8::type_identity::type> > >::type = fmt::v8::appender]’
/home/mrzhao/Desktop/fmt/include/fmt/format-inl.h:2577:39: required from here
/home/mrzhao/Desktop/fmt/include/fmt/format.h:909:3: error:static assertion failed:
static_assert(std::is_same<Sign, sign_t>::value, "");
^
/home/mrzhao/Desktop/fmt/include/fmt/format.h:1308:20: error: ‘OutputIt fmt::v8::detail::write_padded(OutputIt, const fmt::v8::basic_format_specs&, size_t, size_t, F&&) [with fmt::v8::align::type align = (fmt::v8::align::type)1u; OutputIt = fmt::v8::appender; Char = char; F = fmt::v8::detail::write_bytes(OutputIt, fmt::v8::string_view, const fmt::v8::basic_format_specs&) [with fmt::v8::align::type align = (fmt::v8::align::type)1u; Char = char; OutputIt = fmt::v8::appender; fmt::v8::string_view = fmt::v8::basic_string_view]::<lambda(fmt::v8::detail::reserve_iteratorfmt::v8::appender)>&; size_t = long unsigned int]’, declared using local type ‘fmt::v8::detail::write_bytes(OutputIt, fmt::v8::string_view, const fmt::v8::basic_format_specs&) [with fmt::v8::align::type align = (fmt::v8::align::type)1u; Char = char; OutputIt = fmt::v8::appender; fmt::v8::string_view = fmt::v8::basic_string_view]::<lambda(fmt::v8::detail::reserve_iteratorfmt::v8::appender)>’, is used but never defined [-fpermissive]
FMT_CONSTEXPR auto write_padded(OutputIt out,
^
/home/mrzhao/Desktop/fmt/include/fmt/format.h:1308:20: error: ‘OutputIt fmt::v8::detail::write_padded(OutputIt, const fmt::v8::basic_format_specs&, size_t, size_t, F&&) [with fmt::v8::align::type align = (fmt::v8::align::type)1u; OutputIt = fmt::v8::appender; Char = char; F = fmt::v8::detail::write_nonfinite(OutputIt, bool, fmt::v8::basic_format_specs, const fmt::v8::detail::float_specs&) [with Char = char; OutputIt = fmt::v8::appender]::<lambda(fmt::v8::detail::reserve_iteratorfmt::v8::appender)>&; size_t = long unsigned int]’, declared using local type ‘fmt::v8::detail::write_nonfinite(OutputIt, bool, fmt::v8::basic_format_specs, const fmt::v8::detail::float_specs&) [with Char = char; OutputIt = fmt::v8::appender]::<lambda(fmt::v8::detail::reserve_iteratorfmt::v8::appender)>’, is used but never defined [-fpermissive]
CMakeFiles/fmt.dir/build.make:75: recipe for target 'CMakeFiles/fmt.dir/src/format.cc.o' failed
make[2]: *** [CMakeFiles/fmt.dir/src/format.cc.o] Error 1
CMakeFiles/Makefile2:172: recipe for target 'CMakeFiles/fmt.dir/all' failed
make[1]: *** [CMakeFiles/fmt.dir/all] Error 2
Makefile:165: recipe for target 'all' failed
make: *** [all] Error 2

---

and i test other version and there are some errors as :
libgmock.a(gmock-gtest-all.cc.o): In function testing::internal::RE::~RE()': gmock-gtest-all.cc:(.text+0x714f): undefined reference to regfreeA'
gmock-gtest-all.cc:(.text+0x7158): undefined reference to regfreeA' libgmock.a(gmock-gtest-all.cc.o): In function testing::internal::RE::FullMatch(char const*, testing::internal::RE const&)':
gmock-gtest-all.cc:(.text+0x71a2): undefined reference to regexecA' libgmock.a(gmock-gtest-all.cc.o): In function testing::internal::RE::PartialMatch(char const*, testing::internal::RE const&)':
gmock-gtest-all.cc:(.text+0x7202): undefined reference to regexecA' libgmock.a(gmock-gtest-all.cc.o): In function testing::internal::DeathTestImpl::Passed(bool)':
gmock-gtest-all.cc:(.text+0xe0d7): undefined reference to regexecA' libgmock.a(gmock-gtest-all.cc.o): In function testing::internal::RE::Init(char const*)':
gmock-gtest-all.cc:(.text+0x1bdf2): undefined reference to regcompA' gmock-gtest-all.cc:(.text+0x1be14): undefined reference to regcompA'
collect2: error: ld returned 1 exit status
test/CMakeFiles/locale-test.dir/build.make:99: recipe for target 'bin/locale-test' failed
make[2]: *** [bin/locale-test] Error 1
CMakeFiles/Makefile2:179: recipe for target 'test/CMakeFiles/locale-test.dir/all' failed
make[1]: *** [test/CMakeFiles/locale-test.dir/all] Error 2
Makefile:165: recipe for target 'all' failed
make: *** [all] Error 2

---

so what should i do?
thanks

[vitaut]

It's a bug in an older versions of gcc worked around in 43419a4. Thanks for reporting!