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if(doctest_force_link_static_lib_in_target_included)
return()
endif()
set(doctest_force_link_static_lib_in_target_included true)
cmake_minimum_required(VERSION 3.0)
# includes the file to the source with compiler flags
function(doctest_include_file_in_sources header sources)
foreach(src ${sources})
if(${src} MATCHES \\.\(cc|cp|cpp|CPP|c\\+\\+|cxx\)$)
# get old flags
get_source_file_property(old_compile_flags ${src} COMPILE_FLAGS)
if(old_compile_flags STREQUAL "NOTFOUND")
set(old_compile_flags "")
endif()
# update flags
if(MSVC)
set_source_files_properties(${src} PROPERTIES COMPILE_FLAGS
"${old_compile_flags} /FI\"${header}\"")
else()
set_source_files_properties(${src} PROPERTIES COMPILE_FLAGS
"${old_compile_flags} -include \"${header}\"")
endif()
endif()
endforeach()
endfunction()
# this is the magic function - forces every object file from the library to be linked into the target (dll or executable)
function(doctest_force_link_static_lib_in_target target lib)
# check if the library has generated dummy headers
get_target_property(DDH ${lib} DOCTEST_DUMMY_HEADER)
get_target_property(LIB_NAME ${lib} NAME)
if(${DDH} STREQUAL "DDH-NOTFOUND")
# figure out the paths and names of the dummy headers - should be in the build folder for the target
set(BD ${CMAKE_CURRENT_BINARY_DIR}) # get_target_property(BD ${lib} BINARY_DIR) # 'BINARY_DIR' target property unsupported before CMake 3.4 ...
set(dummy_dir ${BD}/${LIB_NAME}_DOCTEST_STATIC_LIB_FORCE_LINK_DUMMIES/)
set(dummy_header ${dummy_dir}/all_dummies.h)
file(MAKE_DIRECTORY ${dummy_dir})
# create a dummy header for each source file, include a dummy function in it and include it in the source file
set(curr_dummy "0")
set(DLL_PRIVATE "#ifndef _WIN32\n#define DLL_PRIVATE __attribute__ ((visibility (\"hidden\")))\n#else\n#define DLL_PRIVATE\n#endif\n\n")
get_target_property(lib_sources ${lib} SOURCES)
foreach(src ${lib_sources})
if(${src} MATCHES \\.\(cc|cp|cpp|CPP|c\\+\\+|cxx\)$)
math(EXPR curr_dummy "${curr_dummy} + 1")
set(curr_dummy_header ${dummy_dir}/dummy_${curr_dummy}.h)
file(WRITE ${curr_dummy_header} "${DLL_PRIVATE}namespace doctest { namespace detail { DLL_PRIVATE int dummy_for_${LIB_NAME}_${curr_dummy}(); DLL_PRIVATE int dummy_for_${LIB_NAME}_${curr_dummy}() { return ${curr_dummy}; } } }")
doctest_include_file_in_sources(${curr_dummy_header} ${src})
endif()
endforeach()
set(total_dummies ${curr_dummy})
# create the master dummy header
file(WRITE ${dummy_header} "${DLL_PRIVATE}namespace doctest { namespace detail {\n\n")
# forward declare the dummy functions in the master dummy header
foreach(curr_dummy RANGE 1 ${total_dummies})
file(APPEND ${dummy_header} "DLL_PRIVATE int dummy_for_${LIB_NAME}_${curr_dummy}();\n")
endforeach()
# call the dummy functions in the master dummy header
file(APPEND ${dummy_header} "\nDLL_PRIVATE int dummies_for_${LIB_NAME}();\nDLL_PRIVATE int dummies_for_${LIB_NAME}() {\n int res = 0;\n")
foreach(curr_dummy RANGE 1 ${total_dummies})
file(APPEND ${dummy_header} " res += dummy_for_${LIB_NAME}_${curr_dummy}();\n")
endforeach()
file(APPEND ${dummy_header} " return res;\n}\n\n} } // namespaces")
# set the dummy header property so we don't recreate the dummy headers the next time this macro is called for this library
set_target_properties(${lib} PROPERTIES DOCTEST_DUMMY_HEADER ${dummy_header})
set(DDH ${dummy_header})
endif()
get_target_property(DFLLTD ${target} DOCTEST_FORCE_LINKED_LIBRARIES_THROUGH_DUMMIES)
get_target_property(target_sources ${target} SOURCES)
if("${DFLLTD}" STREQUAL "DFLLTD-NOTFOUND")
# if no library has been force linked to this target
foreach(src ${target_sources})
if(${src} MATCHES \\.\(cc|cp|cpp|CPP|c\\+\\+|cxx\)$)
doctest_include_file_in_sources(${DDH} ${src})
break()
endif()
endforeach()
# add the library as force linked to this target
set_target_properties(${target} PROPERTIES DOCTEST_FORCE_LINKED_LIBRARIES_THROUGH_DUMMIES ${LIB_NAME})
else()
# if this particular library hasn't been force linked to this target
list(FIND DFLLTD ${LIB_NAME} lib_forced_in_target)
if(${lib_forced_in_target} EQUAL -1)
foreach(src ${target_sources})
if(${src} MATCHES \\.\(cc|cp|cpp|CPP|c\\+\\+|cxx\)$)
doctest_include_file_in_sources(${DDH} ${src})
break()
endif()
endforeach()
# add this library to the list of force linked libraries for this target
list(APPEND DFLLTD ${LIB_NAME})
set_target_properties(${target} PROPERTIES DOCTEST_FORCE_LINKED_LIBRARIES_THROUGH_DUMMIES "${DFLLTD}")
else()
message(AUTHOR_WARNING "LIBRARY \"${lib}\" ALREADY FORCE-LINKED TO TARGET \"${target}\"!")
endif()
endif()
endfunction()
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