[CMake] How to use 'CMAKE_EXE_LINKER_FLAGS' correctly

[Chaos Zhang]

Thanks a lot! `set(FOO_LIBRARY "-Wl,--whole-archive ${FOO_LIBRARY}
-Wl,--no-whole-archive")` worked when the content of ${FOO_LIBRARY} look
like `-Ldir -llib`, if just use lib name as the content of ${FOO_LIBRARY},
error while occur.

Chuck Atkins wrote
>> -rpath
> 
> 
>  RPATHs are automatically added by CMake to executables so they can use
> libraries from the build tree.
> 
> 
> 
>> -whole-archive
>>
> 
> whole-archive is definitely trickier since you shouldn't be applying it to
> the entire executable but instead wrapping individual libraries with it.
> Conveniently, you can pass link options directly with
> target_link_libraries.  So you could have:
> 
> # Just an example, find_library calls should really be isolated to
> separate
> find modules
> find_library(FOO_LIBRARY foo)
> set(FOO_LIBRARY "-Wl,--whole-archive ${FOO_LIBRARY}
> -Wl,--no-whole-archive")
> 
> add_executable(hello main.c)
> target_link_libraries(hello ${FOO_LIBRARY})
> 
> 
>>> set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -L . -lhello")
>>
> 
> CMAKE_EXE_LINKER_FLAGS should work for other more general cases that
> aren't
> tied to specific libraries.  The problem with your example is likely not
> using an absolute path for -L since the compilation is actually taking
> place in a nested work directory somewhere.
> 
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