pdlan / gomibako Goto Github PK

Hi,@pdlan,I get some trouble in compiling the project.I confused if some setting or library get error.
Could you compile it successfully?Hope for help.
The compile error is :
====================[ Build | gomibako | Debug ]================================ /home/sph/Downloads/clion-2019.1/bin/cmake/linux/bin/cmake --build /home/sph/CLionProjects/gomibako/cmake-build-debug --target gomibako -- -j 2 [ 79%] Built target yaml-cpp [ 82%] Building CXX object CMakeFiles/gomibako.dir/src/gomibako.cc.o [ 84%] Building CXX object CMakeFiles/gomibako.dir/src/handlers.cc.o In file included from /home/sph/CLionProjects/gomibako/crow/include/crow.h:19:0, from /home/sph/CLionProjects/gomibako/include/gomibako.h:5, from /home/sph/CLionProjects/gomibako/src/gomibako.cc:8: /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h: In instantiation of ‘crow::TaggedRule<Args>::operator()(Func&&)::<lambda(const crow::request&, crow::response&, Args ...)> [with Func = crow::response (&)(const std::__cxx11::basic_string<char>&); Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >}]’: /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:483:18: required from ‘struct crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const std::__cxx11::basic_string<char>&); Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const struct crow::request&, struct crow::response&, class std::__cxx11::basic_string<char>)>’ /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:479:22: required from ‘typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const std::__cxx11::basic_string<char>&); Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]’ /home/sph/CLionProjects/gomibako/src/gomibako.cc:121:57: required from here /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:485:63: error: variable ‘f’ has function type (const request&, response& res, Args ... args){ ^ /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:485:63: error: variable ‘f’ has function type /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h: In instantiation of ‘struct crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const std::__cxx11::basic_string<char>&); Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const struct crow::request&, struct crow::response&, class std::__cxx11::basic_string<char>)>’: /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:479:22: required from ‘typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const std::__cxx11::basic_string<char>&); Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]’ /home/sph/CLionProjects/gomibako/src/gomibako.cc:121:57: required from here /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:483:18: error: field ‘crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const std::__cxx11::basic_string<char>&); Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const crow::request&, crow::response&, std::__cxx11::basic_string<char>)>::<f capture>’ invalidly declared function type [f] ^ /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h: In instantiation of ‘crow::TaggedRule<Args>::operator()(Func&&)::<lambda(const crow::request&, crow::response&, Args ...)> [with Func = crow::response (&)(int); Args = {long unsigned int}]’: /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:483:18: required from ‘struct crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(int); Args = {long unsigned int}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const struct crow::request&, struct crow::response&, long unsigned int)>’ /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:479:22: required from ‘typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(int); Args = {long unsigned int}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]’ /home/sph/CLionProjects/gomibako/src/gomibako.cc:123:49: required from here /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:485:63: error: variable ‘f’ has function type (const request&, response& res, Args ... args){ ^ /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:485:63: error: variable ‘f’ has function type /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h: In instantiation of ‘struct crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(int); Args = {long unsigned int}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const struct crow::request&, struct crow::response&, long unsigned int)>’: /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:479:22: required from ‘typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(int); Args = {long unsigned int}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]’ /home/sph/CLionProjects/gomibako/src/gomibako.cc:123:49: required from here /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:483:18: error: field ‘crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(int); Args = {long unsigned int}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const crow::request&, crow::response&, long unsigned int)>::<f capture>’ invalidly declared function type [f] ^ /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h: In instantiation of ‘crow::TaggedRule<Args>::operator()(Func&&)::<lambda(const crow::request&, crow::response&, Args ...)> [with Func = crow::response (&)(const std::__cxx11::basic_string<char>&, int); Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, long unsigned int}]’: /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:483:18: required from ‘struct crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const std::__cxx11::basic_string<char>&, int); Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, long unsigned int}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const struct crow::request&, struct crow::response&, class std::__cxx11::basic_string<char>, long unsigned int)>’ /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:479:22: required from ‘typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const std::__cxx11::basic_string<char>&, int); Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, long unsigned int}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]’ /home/sph/CLionProjects/gomibako/src/gomibako.cc:125:61: required from here /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:485:63: error: variable ‘f’ has function type (const request&, response& res, Args ... args){ ^ /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:485:63: error: variable ‘f’ has function type /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h: In instantiation of ‘struct crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const std::__cxx11::basic_string<char>&, int); Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, long unsigned int}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const struct crow::request&, struct crow::response&, class std::__cxx11::basic_string<char>, long unsigned int)>’: /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:479:22: required from ‘typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const std::__cxx11::basic_string<char>&, int); Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, long unsigned int}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]’ /home/sph/CLionProjects/gomibako/src/gomibako.cc:125:61: required from here /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:483:18: error: field ‘crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const std::__cxx11::basic_string<char>&, int); Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, long unsigned int}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const crow::request&, crow::response&, std::__cxx11::basic_string<char>, long unsigned int)>::<f capture>’ invalidly declared function type [f] ^ /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h: In instantiation of ‘crow::TaggedRule<Args>::operator()(Func&&)::<lambda(const crow::request&, crow::response&, Args ...)> [with Func = crow::response (&)(); Args = {}]’: /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:483:18: required from ‘struct crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(); Args = {}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const struct crow::request&, struct crow::response&)>’ /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:479:22: required from ‘typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(); Args = {}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]’ /home/sph/CLionProjects/gomibako/src/gomibako.cc:129:42: required from here /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:485:63: error: variable ‘f’ has function type (const request&, response& res, Args ... args){ ^ /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:485:63: error: variable ‘f’ has function type /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h: In instantiation of ‘struct crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(); Args = {}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const struct crow::request&, struct crow::response&)>’: /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:479:22: required from ‘typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(); Args = {}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]’ /home/sph/CLionProjects/gomibako/src/gomibako.cc:129:42: required from here /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:483:18: error: field ‘crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(); Args = {}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const crow::request&, crow::response&)>::<f capture>’ invalidly declared function type [f] ^ /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h: In instantiation of ‘crow::TaggedRule<Args>::operator()(Func&&)::<lambda(const crow::request&, crow::response&, Args ...)> [with Func = crow::response (&)(const crow::request&); Args = {}]’: /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:508:18: required from ‘struct crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const crow::request&); Args = {}; typename std::enable_if<((! crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value) && crow::black_magic::CallHelper<Func, crow::black_magic::S<crow::request, Args ...> >::value), void>::type = void]::<lambda(const struct crow::request&, struct crow::response&)>’ /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:504:22: required from ‘typename std::enable_if<((! crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value) && crow::black_magic::CallHelper<Func, crow::black_magic::S<crow::request, Args ...> >::value), void>::type crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const crow::request&); Args = {}; typename std::enable_if<((! crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value) && crow::black_magic::CallHelper<Func, crow::black_magic::S<crow::request, Args ...> >::value), void>::type = void]’ /home/sph/CLionProjects/gomibako/src/gomibako.cc:134:91: required from here /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:510:79: error: variable ‘f’ has function type (const crow::request& req, crow::response& res, Args ... args){ ^ /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:510:79: error: variable ‘f’ has function type /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h: In instantiation of ‘struct crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const crow::request&); Args = {}; typename std::enable_if<((! crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value) && crow::black_magic::CallHelper<Func, crow::black_magic::S<crow::request, Args ...> >::value), void>::type = void]::<lambda(const struct crow::request&, struct crow::response&)>’: /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:504:22: required from ‘typename std::enable_if<((! crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value) && crow::black_magic::CallHelper<Func, crow::black_magic::S<crow::request, Args ...> >::value), void>::type crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const crow::request&); Args = {}; typename std::enable_if<((! crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value) && crow::black_magic::CallHelper<Func, crow::black_magic::S<crow::request, Args ...> >::value), void>::type = void]’ /home/sph/CLionProjects/gomibako/src/gomibako.cc:134:91: required from here /home/sph/CLionProjects/gomibako/crow/include/crow/routing.h:508:18: error: field ‘crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const crow::request&); Args = {}; typename std::enable_if<((! crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value) && crow::black_magic::CallHelper<Func, crow::black_magic::S<crow::request, Args ...> >::value), void>::type = void]::<lambda(const crow::request&, crow::response&)>::<f capture>’ invalidly declared function type [f] ^ In file included from /usr/include/c++/7/functional:58:0, from /usr/include/boost/utility/compare_pointees.hpp:15, from /usr/include/boost/optional/optional.hpp:51, from /usr/include/boost/optional.hpp:15, from /home/sph/CLionProjects/gomibako/crow/include/crow/query_string.h:9, from /home/sph/CLionProjects/gomibako/crow/include/crow.h:2, from /home/sph/CLionProjects/gomibako/include/gomibako.h:5, from /home/sph/CLionProjects/gomibako/src/gomibako.cc:8: /usr/include/c++/7/bits/std_function.h:541:2: error: ‘std::function<_Res(_ArgTypes ...)>::_Requires<std::function<_Res(_ArgTypes ...)>::_Callable<typename std::decay<_U1>::type>, std::function<_Res(_ArgTypes ...)>&> std::function<_Res(_ArgTypes ...)>::operator=(_Functor&&) [with _Functor = crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const std::__cxx11::basic_string<char>&); Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const crow::request&, crow::response&, std::__cxx11::basic_string<char>)>; _Res = void; _ArgTypes = {const crow::request&, crow::response&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >}; std::function<_Res(_ArgTypes ...)>::_Requires<std::function<_Res(_ArgTypes ...)>::_Callable<typename std::decay<_U1>::type>, std::function<_Res(_ArgTypes ...)>&> = std::function<void(const crow::request&, crow::response&, std::__cxx11::basic_string<char>)>&]’, declared using local type ‘crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const std::__cxx11::basic_string<char>&); Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const crow::request&, crow::response&, std::__cxx11::basic_string<char>)>’, is used but never defined [-fpermissive] operator=(_Functor&& __f) ^~~~~~~~ /usr/include/c++/7/bits/std_function.h:541:2: error: ‘std::function<_Res(_ArgTypes ...)>::_Requires<std::function<_Res(_ArgTypes ...)>::_Callable<typename std::decay<_U1>::type>, std::function<_Res(_ArgTypes ...)>&> std::function<_Res(_ArgTypes ...)>::operator=(_Functor&&) [with _Functor = crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(int); Args = {long unsigned int}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const crow::request&, crow::response&, long unsigned int)>; _Res = void; _ArgTypes = {const crow::request&, crow::response&, long unsigned int}; std::function<_Res(_ArgTypes ...)>::_Requires<std::function<_Res(_ArgTypes ...)>::_Callable<typename std::decay<_U1>::type>, std::function<_Res(_ArgTypes ...)>&> = std::function<void(const crow::request&, crow::response&, long unsigned int)>&]’, declared using local type ‘crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(int); Args = {long unsigned int}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const crow::request&, crow::response&, long unsigned int)>’, is used but never defined [-fpermissive] /usr/include/c++/7/bits/std_function.h:541:2: error: ‘std::function<_Res(_ArgTypes ...)>::_Requires<std::function<_Res(_ArgTypes ...)>::_Callable<typename std::decay<_U1>::type>, std::function<_Res(_ArgTypes ...)>&> std::function<_Res(_ArgTypes ...)>::operator=(_Functor&&) [with _Functor = crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const std::__cxx11::basic_string<char>&, int); Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, long unsigned int}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const crow::request&, crow::response&, std::__cxx11::basic_string<char>, long unsigned int)>; _Res = void; _ArgTypes = {const crow::request&, crow::response&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, long unsigned int}; std::function<_Res(_ArgTypes ...)>::_Requires<std::function<_Res(_ArgTypes ...)>::_Callable<typename std::decay<_U1>::type>, std::function<_Res(_ArgTypes ...)>&> = std::function<void(const crow::request&, crow::response&, std::__cxx11::basic_string<char>, long unsigned int)>&]’, declared using local type ‘crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const std::__cxx11::basic_string<char>&, int); Args = {std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >, long unsigned int}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const crow::request&, crow::response&, std::__cxx11::basic_string<char>, long unsigned int)>’, is used but never defined [-fpermissive] /usr/include/c++/7/bits/std_function.h:541:2: error: ‘std::function<_Res(_ArgTypes ...)>::_Requires<std::function<_Res(_ArgTypes ...)>::_Callable<typename std::decay<_U1>::type>, std::function<_Res(_ArgTypes ...)>&> std::function<_Res(_ArgTypes ...)>::operator=(_Functor&&) [with _Functor = crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(); Args = {}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const crow::request&, crow::response&)>; _Res = void; _ArgTypes = {const crow::request&, crow::response&}; std::function<_Res(_ArgTypes ...)>::_Requires<std::function<_Res(_ArgTypes ...)>::_Callable<typename std::decay<_U1>::type>, std::function<_Res(_ArgTypes ...)>&> = std::function<void(const crow::request&, crow::response&)>&]’, declared using local type ‘crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(); Args = {}; typename std::enable_if<crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value, void>::type = void]::<lambda(const crow::request&, crow::response&)>’, is used but never defined [-fpermissive] /usr/include/c++/7/bits/std_function.h:541:2: error: ‘std::function<_Res(_ArgTypes ...)>::_Requires<std::function<_Res(_ArgTypes ...)>::_Callable<typename std::decay<_U1>::type>, std::function<_Res(_ArgTypes ...)>&> std::function<_Res(_ArgTypes ...)>::operator=(_Functor&&) [with _Functor = crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const crow::request&); Args = {}; typename std::enable_if<((! crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value) && crow::black_magic::CallHelper<Func, crow::black_magic::S<crow::request, Args ...> >::value), void>::type = void]::<lambda(const crow::request&, crow::response&)>; _Res = void; _ArgTypes = {const crow::request&, crow::response&}; std::function<_Res(_ArgTypes ...)>::_Requires<std::function<_Res(_ArgTypes ...)>::_Callable<typename std::decay<_U1>::type>, std::function<_Res(_ArgTypes ...)>&> = std::function<void(const crow::request&, crow::response&)>&]’, declared using local type ‘crow::TaggedRule<Args>::operator()(Func&&) [with Func = crow::response (&)(const crow::request&); Args = {}; typename std::enable_if<((! crow::black_magic::CallHelper<Func, crow::black_magic::S<Args ...> >::value) && crow::black_magic::CallHelper<Func, crow::black_magic::S<crow::request, Args ...> >::value), void>::type = void]::<lambda(const crow::request&, crow::response&)>’, is used but never defined [-fpermissive] CMakeFiles/gomibako.dir/build.make:75: recipe for target 'CMakeFiles/gomibako.dir/src/gomibako.cc.o' failed make[3]: *** [CMakeFiles/gomibako.dir/src/gomibako.cc.o] Error 1 make[3]: *** Waiting for unfinished jobs.... CMakeFiles/Makefile2:72: recipe for target 'CMakeFiles/gomibako.dir/all' failed make[2]: *** [CMakeFiles/gomibako.dir/all] Error 2 CMakeFiles/Makefile2:84: recipe for target 'CMakeFiles/gomibako.dir/rule' failed make[1]: *** [CMakeFiles/gomibako.dir/rule] Error 2 Makefile:164: recipe for target 'gomibako' failed make: *** [gomibako] Error 2