# Revision history [back]

Thanks @ahendrix for you comment. For the record: appending to package_INCLUDE_DIRS in the cmake extras works as expected (it also ends up in catkin_INCLUDE_DIRS). The solution I went with for now is installing all headers into one common sub-directory as in my option 3 above. I append this to the INCLUDE_DIRS in the cmake extras of my one "common" pacakge, that all other packages depend on. This way I don't have to add cmake extras to every single package, but still stick with the cmake convention of having all include dirs on project_INCLUDE_DIRS (through the build-export-depends on the "common" pacakge). Any additional comments and insights are still welcome.

Thanks @ahendrix for you comment. For the record: appending to package_INCLUDE_DIRS in the cmake extras works as expected (it also ends up in catkin_INCLUDE_DIRS). The solution I went with for now is installing all headers into one common sub-directory as in my option 3 above. I append this to the INCLUDE_DIRS in the cmake extras of my one "common" pacakge, that all other packages depend on. This way I don't have to add cmake extras to every single package, but still stick with the cmake convention of having all include dirs on project_INCLUDE_DIRS (through the build-export-depends on the "common" pacakge). Any additional comments and insights are still welcome.

Edit: For future reference, I added a filter common_pkg-extras.cmake.installspace.in in the folder cmake of my common_pkg with content:

if(_COMMON_LIB_EXTRAS_INCLUDED_)
return()
endif()
set(_COMMON_LIB_EXTRAS_INCLUDED_ TRUE)

list(APPEND common_lib_INCLUDE_DIRS "${common_lib_DIR}/../../../@CATKIN_GLOBAL_INCLUDE_DESTINATION@/MyProjectSubfolder")  Thanks @ahendrix for you comment. For the record: appending to package_INCLUDE_DIRS in the cmake extras works as expected (it also ends up in catkin_INCLUDE_DIRS). The solution I went with for now is installing all headers into one common sub-directory as in my option 3 above. I append this to the INCLUDE_DIRS in the cmake extras of my one "common" pacakge, that all other packages depend on. This way I don't have to add cmake extras to every single package, but still stick with the cmake convention of having all include dirs on project_INCLUDE_DIRS (through the build-export-depends on the "common" pacakge). Any additional comments and insights are still welcome. Edit: For future reference, I added a filter common_pkg-extras.cmake.installspace.in in the folder cmake of my common_pkg with content: if(_COMMON_LIB_EXTRAS_INCLUDED_) return() endif() set(_COMMON_LIB_EXTRAS_INCLUDED_ TRUE) list(APPEND common_lib_INCLUDE_DIRS "${common_lib_DIR}/../../../@CATKIN_GLOBAL_INCLUDE_DESTINATION@/MyProjectSubfolder")


Edit2: As @dirk-thomas pointed out, the additions in cmake-extras will of course not be reflected in the generated .pc files. For me, this is not an issue currently.