cmake: Create hpp-fcl-compatibility component to allow to only install the compatibility layer

Author: jorisv

.gitmodules

@@ -1,6 +1,6 @@
 [submodule "cmake"]
 	path = cmake
-	url = https://github.com/jrl-umi3218/jrl-cmakemodules.git
+	url = https://github.com/jorisv/jrl-cmakemodules.git
 [submodule "third-parties/qhull"]
 	path = third-parties/qhull
 	url = https://github.com/qhull/qhull.git

CMakeLists.txt

@@ -317,7 +317,7 @@ SET(${PROJECT_NAME}_HEADERS
   )
 
 if(COAL_BACKWARD_COMPATIBILITY_WITH_HPP_FCL)
-  LIST(APPEND ${PROJECT_NAME}_HEADERS
+  SET(HPP_FCL_BACKWARD_COMPATIBILITY_HEADERS
     include/hpp/fcl/broadphase/broadphase_bruteforce.h
     include/hpp/fcl/broadphase/broadphase_callbacks.h
     include/hpp/fcl/broadphase/broadphase_collision_manager.h
@@ -444,6 +444,8 @@ if(COAL_BACKWARD_COMPATIBILITY_WITH_HPP_FCL)
     include/hpp/fcl/timings.h
     include/hpp/fcl/warning.hh
     )
+  LIST(APPEND ${PROJECT_NAME}_HEADERS ${HPP_FCL_BACKWARD_COMPATIBILITY_HEADERS})
+  HEADER_INSTALL(COMPONENT hpp-fcl-compatibility ${HPP_FCL_BACKWARD_COMPATIBILITY_HEADERS})
 endif()
 
 IF(COAL_HAS_OCTOMAP)
@@ -485,7 +487,11 @@ if(COAL_BACKWARD_COMPATIBILITY_WITH_HPP_FCL)
   write_basic_package_version_file(hpp-fclConfigVersion.cmake
       VERSION 3.0.0
       COMPATIBILITY AnyNewerVersion)
-  install(FILES hpp-fclConfig.cmake ${CMAKE_CURRENT_BINARY_DIR}/hpp-fclConfigVersion.cmake DESTINATION lib/cmake/hpp-fcl)
+  install(FILES hpp-fclConfig.cmake ${CMAKE_CURRENT_BINARY_DIR}/hpp-fclConfigVersion.cmake
+          DESTINATION lib/cmake/hpp-fcl
+          COMPONENT hpp-fcl-compatibility)
+  include("${JRL_CMAKE_MODULES}/install-helpers.cmake")
+  add_install_target(NAME hpp-fcl-compatibility COMPONENT hpp-fcl-compatibility)
 endif()
 
 setup_project_finalize()

cmake

@@ -11,7 +11,10 @@ if(CMAKE_VERSION VERSION_LESS "3.18.0")
     get_property(_cfg TARGET coal::coal PROPERTY IMPORTED_CONFIGURATIONS)
     get_property(_loc TARGET coal::coal PROPERTY "IMPORTED_LOCATION_${_cfg}")
     set_property(TARGET hpp-fcl::hpp-fcl PROPERTY IMPORTED_LOCATION "${_loc}")
+    target_compile_definitions(hpp-fcl::hpp-fcl PUBLIC COAL_BACKWARD_COMPATIBILITY_WITH_HPP_FCL)
   endif()
 else()
-  add_library(hpp-fcl::hpp-fcl ALIAS coal::coal)
+    add_library(hpp-fcl::hpp-fcl INTERFACE)
+    target_link_libraries(hpp-fcl::hpp-fcl INTERFACE coal::coal)
+    target_compile_definitions(hpp-fcl::hpp-fcl INTERFACE COAL_BACKWARD_COMPATIBILITY_WITH_HPP_FCL)
 endif()

hpp-fclConfig.cmake

@@ -191,6 +191,6 @@ ENDFOREACH(python)
 
 
 if(COAL_BACKWARD_COMPATIBILITY_WITH_HPP_FCL)
-  python_install_on_site(hppfcl __init__.py)
-  python_install_on_site(hppfcl viewer.py)
+  python_install_on_site(hppfcl __init__.py COMPONENT hpp-fcl-compatibility)
+  python_install_on_site(hppfcl viewer.py COMPONENT hpp-fcl-compatibility)
 endif()