Below is a small sample of the way I'm building my project. I have a list of headers and a list of source files, and pass them to add_executable. Sometimes after several incremental builds, I'm changing the header file but the build isn't doing anything. The status shows that each target is checked but no changes are seen. If I do a small modification in the CPP file, then the build is executed.
What could be the cause of this?
list (APPEND ${PROJ_NAME}_SRC_HEADERS ${CMAKE_CURRENT_SOURCE_DIR}/include/lua/lua_config.hpp)
list (APPEND ${PROJ_NAME}_SRC_FILES ${CMAKE_CURRENT_SOURCE_DIR}/source/lua/lua_config.cpp)
add_executable(${PROJ_NAME} ${${PROJ_NAME}_SRC_FILES} ${${PROJ_NAME}_SRC_HEADERS})
I'm using the 'Unix Makefiles' generator.
I see that all my projects header files are not part of the generated depend.cmake file. I guess this is the root of the problem. All the header files from the other conan packages are there, but not the ones for the top level project.
Two things are needed for the header files to be added to the depend.make file. First adding them in the list of files of the target, which I did and add the include directory using target_include_directories.
target_include_directories(${PROJ_NAME} PRIVATE
$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
)
At this point it's still not working. This is because I'm passing two lists of files that are separated using a space ' ' character. After I joined the two lists into a single one using a ';' it started working.
add_executable(${PROJ_NAME} "${${PROJ_NAME}_SRC_FILES};${${PROJ_NAME}_HEADER_FILES}")