I have a project which compiles and links into both a stand alone executable and a dynamic shared library. The library and the executable link against the same project libraries but have different object files containing their entry points: main.o for the executable and dll_main.o for the library. My project heirarchy looks like this (simplified a bit for brevity):
CMakeLists.txt mtx_source/CMakeLists.txt mtx_wrapper/CMakeLists.txt testbench/CMakeLists.txt The top level CMakeLists.txt calls add_subdirectory on the various project specific library folders which each build a static library. The testbench folder is the one that builds both the executable and the dynamic library. When building the dynamic library I need to use the linker options -whole-archive and -no-whole-archive to force my static project libraries to be included into the dynamic library. The problem is how to insert the -whole-archive and -no-whole-archive options so that they select the correct set of libraries. Currently in the testbench CMakeLists.txt file I have these lines: set(libs VLC mvea ${SYSTEMC_SUPPORT_LIBRARIES} ${DEVIFSLAVE_LIBRARIES} ${SYSTEMC_LIBRARIES} ${SIM_UTILS_LIBRARIES} ${HWDEBUG_LIBRARIES} ) if (NOT STUB_OUT_MTX) list(APPEND libs mtx_wrapper) endif() set(libs_dll ${libs} transif_slave) if (UNIX) list(INSERT libs_dll 0 -Wl,-whole-archive) list(APPEND libs_dll -Wl,-no-whole-archive) endif() add_library ( csim_dll SHARED ${sources_dll} ${headers_dll} ) add_executable( testbench ${sources} ${headers} ) target_link_libraries(csim_dll ${libs_dll} ${PTHREADS_LIBRARIES} ) target_link_libraries(testbench ${libs} ${PTHREADS_LIBRARIES} ) which produces the following link line: /usr/bin/g++-4.7 -fPIC -m32 -m32 -m32 -fPIC -m32 -O3 -O3 -DHIDEBUG -Wl,-Bsymbolic -shared -Wl,-soname,libtopazhp.so -o libtopazhp.so CMakeFiles/csim_dll.dir/dll_main.cpp.o CMakeFiles/csim_dll.dir/main_common.cpp.o -lm -lrt -lm -lrt -Wl,-whole-archive ../mvea/VLC/libVLC.a ../mvea/libmvea.a ../systemCSupport/libsystemc_support.a ../devif_slave/libDevifSlave.a ../systemC/libsystemc.a ../sim_utils/libsim_utils.a ../hwdebug/libhwDebug.a ../mtx_wrapper/libmtx_wrapper.a ../transif/libtransif_slave.a -Wl,-no-whole-archive -lpthread -lz ../systemC/libpthreads_dummy.a ../external_mtx/src/external_mtx-build/metag/libmetag.a ../external_mtx/src/external_mtx-build/metagcopro/libmetagcopro.a ../external_mtx/src/external_mtx-build/metac/vmetastub/libvmetastub.a ../external_mtx/src/external_mtx-build/metac/insim/libinsimfpu.a ../external_mtx/src/external_mtx-build/mtx/insim-mtxg/libinsim-mtxg.a ../external_mtx/src/external_mtx-build/mtx/libmtxc.a -ldl -lm -lrt -lm -lrt The problem is that the 6 external_mtx libraries should have been included inside the -whole-archive section. These libraries are specified in the mtx_wrapper folder with a target_link_libraries(mtx_wrapper ${METASIM_LIBRARIES}) command. I have managed to wrap the direct library dependencies inside the -whole-archive but I need to ensure that any sub-dependencies are included as well (and any dependencies they might have recursively). Any system dynamic libaries (-ldl -lm -lrt etc.) must appear after the -no-whole-archive option otherwise the link fails. The mtx_wrapper library can be built in two ways and only one of them will add the extra METASIM libraries as a dependency, the other way fakes that code internally. Adding the METASIM libraries via target_link_libraries() inside the mtx_wrapper CMakeLists.txt correctly handles that dependency when linking the standalone executable but is not working for linking the dynamic library. Is there an easy way to get cmake to handle all this ? Is there a way to get a list of all the static libraries (libXXX.a) that will be included on the link line for a target ? -- Glenn
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