So this is what I put into my OpenCASCADE config file

SET( CONFIG_FILE_CONTENTS
"\nGET_FILENAME_COMPONENT( SELF_DIR \"\${CMAKE_CURRENT_LIST_FILE}\" PATH )"
   "\nINCLUDE( \${SELF_DIR}/OpenCASCADE-targets.cmake )"
"\nGET_FILENAME_COMPONENT( OPENCASCADE_INCLUDE_DIRS \"\${SELF_DIR}/../../include/OpenCASCADE\" ABSOLUTE )"
   "\nSET( OPENCASCADE_LIBRARIES ${OCC_ToolKits_SPACED} )"
   "\nSET( OPENCASCADE_FOUND TRUE )"
   "\n" )

and I put this into my wxWidgets config file

SET( CONFIG_FILE_CONTENTS
"\nGET_FILENAME_COMPONENT( SELF_DIR \"\${CMAKE_CURRENT_LIST_FILE}\" PATH )"
   "\nINCLUDE( \${SELF_DIR}/wxWidgets-targets.cmake )"
"\nGET_FILENAME_COMPONENT( wxWidgets_INCLUDE_DIRS \"\${SELF_DIR}/../../include\" ABSOLUTE )" "\nSET( wxWidgets_LIBRARIES wxexpat ${wxaui_TARGET} ${wxxrc_TARGET} ${wxadv_TARGET} ${wxhtml_TARGET} ${wxgl_TARGET} ${wxxml_TARGET} ${wxbase_TARGET} ${wxcore_TARGET} ${WXWIDGETS_PLATFORM_DEPENDENT_LIBS} )" "\nGET_FILENAME_COMPONENT( wxWidgets_wxrc_EXECUTABLE \"\${SELF_DIR}/../../bin/wxrc${CMAKE_EXECUTABLE_SUFFIX}\" ABSOLUTE )"
   "\nSET( wxWidgets_DEFINITIONS ${COMPILE_DEFS_SPACED} )"
   "\nSET( wxWidgets_DEFINITIONS_DEBUG ${COMPILE_DEFS_SPACED_DEBUG} )"
   "\nSET( wxWidgets_FOUND TRUE )"
   "\n" )

and my project has ths config file

   SET( CONFIG_FILE_CONTENTS
"\nGET_FILENAME_COMPONENT( SELF_DIR \"\${CMAKE_CURRENT_LIST_FILE}\" PATH )"
       "\nINCLUDE( \${SELF_DIR}/${CMGUI_LIB_GROUP}-targets.cmake )"
"\nGET_FILENAME_COMPONENT( CMGUI_INCLUDE_DIRS \"\${SELF_DIR}/../../include/cmgui\" ABSOLUTE )" "\nSET( CMGUI_LIBRARIES ${TARGET_CMGUI_LIB} ${TARGET_CMGUI_GENERAL_LIB} ${TARGET_CMGUI_CORE_FIELDS_LIB} ${TARGET_CMGUI_PASS_THROUGH_LIB} )"
       "\nSET( CMGUI_FOUND TRUE )"
       "\n\n" )

After thinking about this over the weekend I am thinking I might have to add some conditional INCLUDEs in to drag in the imported libraries from OpenCASCADE, wxWidgets .e.t.c.. I am not sure about this approach because it releies on libraries being stationary, as an alternative I thought I could add a FIND_PACKAGE with a HINTS to find the config file. It seems to me like I am just implementing a libtool archive file in CMake, not my intention but I can see the attraction in it.


Michael Hertling wrote:
Does your library provide a config file for itself, and does this
config file access the prerequisites' config files in some way? How do
you forward the prerequisites' settings through your library's config
file to the application's CMakeLists.txt? Perhaps, you could post an
example to point out your concern in more detail.

Best regards,

Michael
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