undefined reference to 'vtable for httplib::detail::nocompressor'

[jakehffn]

When building on windows with mingw-64 tools I get the error undefined reference to 'vtable for httplib::detail::nocompressor'. The build is successful if I checkout the commit 0a9102: the one before the most recent commit.

[hqo998]

Same issue with latest with docker using clang + ninja along with mac os with clang + cmake

[build]   "vtable for httplib::detail::nocompressor", referenced from:
[build]       httplib::detail::nocompressor::nocompressor() in unity_0_cxx.cxx.o
[build]    NOTE: a missing vtable usually means the first non-inline virtual member function has no definition.
[build] ld: symbol(s) not found for architecture x86_64
[build] clang++: error: linker command failed with exit code 1 (use -v to see invocation)```

and also 

```FAILED: sharenote 
43.61 : && /usr/bin/c++ -O3 -DNDEBUG -static -Wl,--dependency-file=CMakeFiles/sharenote.dir/link.d CMakeFiles/sharenote.dir/src/backend/main.cpp.o -o sharenote  libsqlite3_lib.a && :
43.61 /usr/bin/ld: CMakeFiles/sharenote.dir/src/backend/main.cpp.o: in function `httplib::detail::create_client_socket(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, int, int, bool, bool, std::function<void (int)>, long, long, long, long, long, long, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, httplib::Error&)::{lambda(int, addrinfo&, bool&)#1}::operator()(int, addrinfo&, bool&) const':
43.61 main.cpp:(.text._ZZN7httplib6detail20create_client_socketERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES8_iibbSt8functionIFviEEllllllS8_RNS_5ErrorEENKUliR8addrinfoRbE_clEiSF_SG_[_ZZN7httplib6detail20create_client_socketERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEES8_iibbSt8functionIFviEEllllllS8_RNS_5ErrorEENKUliR8addrinfoRbE_clEiSF_SG_]+0x274): warning: Using 'getaddrinfo' in statically linked applications requires at runtime the shared libraries from the glibc version used for linking
43.61 /usr/bin/ld: CMakeFiles/sharenote.dir/src/backend/main.cpp.o: in function `httplib::Server::write_response_core(httplib::Stream&, bool, httplib::Request const&, httplib::Response&, bool)':
43.61 main.cpp:(.text._ZN7httplib6Server19write_response_coreERNS_6StreamEbRKNS_7RequestERNS_8ResponseEb[_ZN7httplib6Server19write_response_coreERNS_6StreamEbRKNS_7RequestERNS_8ResponseEb]+0xc3b): undefined reference to `vtable for httplib::detail::nocompressor'
43.61 collect2: error: ld returned 1 exit status
43.61 ninja: build stopped: subcommand failed.```

[yhirose]

Thanks for the report!

[yhirose]

@Skylion007 it seems like the commit (#2283) causes this issue. I'll investigate it when I have time, but could you please also take a look at this issue? Thanks!

[yhirose]

@Skylion007 I did some research, and it looks like my recent commit actually causes this issue. So not your fault at all. Sorry for jumping to conclusions. :)