mingw g ++无法链接到库

Question

I'm trying to use X86_64-w64-mingw32-g++ (packaged in Archlinux's MingW package) to cross compile some C++ code into an Windows executable, however I'm having trouble getting past some issues.

I'm calling

x86_64-w64-mingw32-g++ -o build_win/asm build_win/asm.o build_win/asm_lib.o build_win/socket_boost.o -I../extra/etc -fopenmp -lrt -std=c++11 -g -lboost_system -lboost_serialization 

from a makefile, but I get thrown the errors:

/usr/lib/gcc/x86_64-w64-mingw32/5.1.0/../../../../x86_64-w64-mingw32/bin/ld: cannot find -lrt
/usr/lib/gcc/x86_64-w64-mingw32/5.1.0/../../../../x86_64-w64-mingw32/bin/ld: cannot find -lboost_system
/usr/lib/gcc/x86_64-w64-mingw32/5.1.0/../../../../x86_64-w64-mingw32/bin/ld: cannot find -lboost_serialization

This works fine with native g++, so exactly do I have to change for mingw to compile?

EDIT: I have mingw-w64-boost package installed, which includes boost libraries pre-compiled and ready to be linked. However, it seems the naming convention is a bit different, and -lboost_system for example becomes -llibboost_system-mt (not exactly sure what the -mt suffix entails).

Problem is I can't find the mingw counterpart for -lrt . I've tried with both -lrtm and -lrtutils but in both cases I get:

[...] 
undefined reference to `__imp_getsockopt'

Answer 1

Are you sure that -lboost_system and other libraries are present in the same directory as makefile ?

If not then please include -L flag which indicates the location of your library.

For example:

-L /path_openmp -fopenmp -L /path_boost_system/ -lboost_system -L /path_serialization -lboost_serialization

Moreover, you need not include -I and -g flag when creating an executable from .o files. These are needed when you create .o from .cpp files.

Answer 2

There is no rt library on Windows.

You are missing -lws2_32 .

$ x86_64-w64-mingw32-nm -A  /usr/x86_64-w64-mingw32/lib/*.a 2>/dev/null | grep getsockopt | grep " T "