Compiling C++ with parameters using CMake in CLion throws errors while compiling in terminal does not

Question

I've got a simple code which uses SFML library and it requires to be compiled with

-lsfml-graphics -lsfml-system -lsfml-window parameters.

It works just fine when I simply use cmd

  g++ gejm.cpp -o gejm -lsfml-graphics -lsfml-system -lsfml-window

  .\gejm.exe

However when I run it using CLion I get errors as if my parameters weren't passed. But I know my parameters ARE passed because if I misspell any of them an error is thrown before my code even gets compiled.

My CMakeLists.txt looks like this

set(GCC_COVERAGE_COMPILE_FLAGS "-lsfml-graphics -lsfml-system -lsfml-window")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GCC_COVERAGE_COMPILE_FLAGS}" )

add_executable(gejm gejm.cpp)

So what is the problem?

...here's the errors

CMakeFiles\gejm.dir/objects.a(gejm.obj): In function `main':
D:/Projects/CPP/GUI/gejm.cpp:8: undefined reference to `_imp___ZN2sf6StringC1EPKcRKSt6locale'
D:/Projects/CPP/GUI/gejm.cpp:8: undefined reference to `_imp___ZN2sf9VideoModeC1Ejjj'
D:/Projects/CPP/GUI/gejm.cpp:8: undefined reference to `_imp___ZN2sf12RenderWindowC1ENS_9VideoModeERKNS_6StringEjRKNS_15ContextSettingsE'
D:/Projects/CPP/GUI/gejm.cpp:9: undefined reference to `_imp___ZNK2sf10WindowBase6isOpenEv'
D:/Projects/CPP/GUI/gejm.cpp:11: undefined reference to `_imp___ZN2sf10WindowBase9pollEventERNS_5EventE'
D:/Projects/CPP/GUI/gejm.cpp:13: undefined reference to `_imp___ZN2sf6Window5closeEv'
D:/Projects/CPP/GUI/gejm.cpp:17: undefined reference to `_imp___ZN2sf5ColorC1Ehhhh'
D:/Projects/CPP/GUI/gejm.cpp:17: undefined reference to `_imp___ZN2sf12RenderTarget5clearERKNS_5ColorE'
D:/Projects/CPP/GUI/gejm.cpp:18: undefined reference to `_imp___ZN2sf6Window7displayEv'
D:/Projects/CPP/GUI/gejm.cpp:8: undefined reference to `_imp___ZN2sf12RenderWindowD1Ev'
D:/Projects/CPP/GUI/gejm.cpp:8: undefined reference to `_imp___ZN2sf12RenderWindowD1Ev'
collect2.exe: error: ld returned 1 exit status
CMakeFiles\gejm.dir\build.make:84: recipe for target 'gejm.exe' failed
CMakeFiles\Makefile2:71: recipe for target 'CMakeFiles/gejm.dir/all' failed
mingw32-make.exe[3]: *** [gejm.exe] Error 1
mingw32-make.exe[2]: *** [CMakeFiles/gejm.dir/all] Error 2
CMakeFiles\Makefile2:83: recipe for target 'CMakeFiles/gejm.dir/rule' failed
mingw32-make.exe[1]: *** [CMakeFiles/gejm.dir/rule] Error 2
mingw32-make.exe: *** [gejm] Error 2
Makefile:117: recipe for target 'gejm' failed

score 0 · Accepted Answer · answered Jan 22 '19 at 20:01

This is not how to add libraries:

set(GCC_COVERAGE_COMPILE_FLAGS "-lsfml-graphics -lsfml-system -lsfml-window")

Add these libraries to the list of libraries:

target_link_libraries(gejm PUBLIC sfml-graphics sfml-system sfml-window)

Th reason it doesn't work is that the link stage is not the compilation stage and you only overrode the compilation flags, not the link flags. Anyway, it would not have been the proper way to go. Use what CMake provides, don't hack something in.

Oh, looks like I wasn't really aware of what I was doing. Works though, thank you kind sir. — Ян Никодим Лудян Печул, Jan 22 '19 at 20:06

Compiling C++ with parameters using CMake in CLion throws errors while compiling in terminal does not

1 Answers1