linking librarys as a part of flags in toolchain file in cmake

Question

i've tried to add PROFILE to the CMAKE_BUILD_TYPES. For this I need to add -finstrument-functionsto the CMAKE_CXX_FLAGS in the toolchain file and link the belonging library with the absolut path in the CMakeLists.txt via target_link_libraries. So far so good and unproblematic.

But when refreshing the buildinformations cmake checks if the compiler stil does it's job. And now "is not able to compile a simple test program", due to the lack of the needed library, which is linked later in the CMakeLists.

So I commented the -finstrument-functions flag and the testprogramm could be compiled.

I've tried to: - Set librarie and path as a part of the CXX flags with -L -l:

• Use the link_directories(<dir>) command as well as SET(CMAKE_LINK_DIRECTORIES_BEFORE <Path> ) and SET(CMAKE_LIBRARY_PATH <Path>)

• Set variables in the toolchainfile and call them later in the cmakelists:

SET(ADDITIONAL_PROFILE_LIBRARY  "$ENV{QNX_BASE}/target/qnx7/armle-v7/usr/liblibprofilingS.a")
SET(ADDITIONAL_PROFILE_FLAGS "-finstrument-functions")

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}" "${ADDITIONAL_PROFILE_FLAGS}")
add_executable(toolchainTester main.cpp)
target_link_libraries(toolchainTester ${ADDITIONAL_PROFILE_LIBRARY})

But then getting the error: mingw32-make.exe[3]: *** No rule to make target 'C:/qnx700/target/qnx7/armle-v7/usr/liblibprofilingS.a', needed by '../out/profileout'. Stop.

Got anyone any more ideas? Thanks in advance.

Answer 1

If there anyone out there, looking for the same workaround how to manage different flags and libraries for different profiles, this is one working way:

First set variables in the toolchainfile

SET(ADDITIONAL_PROFILE_LIBRARY  "$ENV{QNX_BASE}/target/qnx7/armle-v7/usr/lib/libprofilingS.a")
SET(ADDITIONAL_CXX_FLAGS "-finstrument-functions")

The call/overright them in the CMakeLists.txt

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}" "${ADDITIONAL_CXX_FLAGS}")

add_executable(toolchainTester main.cpp)

target_link_libraries(toolchainTester ${ADDITIONAL_PROFILE_LIBRARY})