Adding configuration such that CMake find_package can also find the

installed package.

Export all libraries to milkTargets.cmake, which gets installed in
lib/cmake (following pkgconfig).
Also create milk_all alias for a collective target that would include
all libraries in client project.
Generate milkConfigVersion.cmake and milkConfig.cmake, which are also
installed in lib/cmake.

CMakeLists.txt

@@ -278,7 +278,9 @@ set(PROGRAM_PERMISSIONS_DEFAULT
     WORLD_READ WORLD_EXECUTE)
 
 
-install(TARGETS milk DESTINATION bin PERMISSIONS ${PROGRAM_PERMISSIONS_DEFAULT} SETUID)
+install(TARGETS milk
+      DESTINATION bin
+      PERMISSIONS ${PROGRAM_PERMISSIONS_DEFAULT} SETUID)
 
 
 
@@ -294,6 +296,53 @@ if(INSTALLMAKEDEFAULT)
 endif(INSTALLMAKEDEFAULT)
 
 
+# =======================================
+# CONFIG.CMAKE
+# =======================================
+
+set(INCLUDE_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/include
+    CACHE PATH "Location of header files" )
+set(LIBRARY_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/lib
+    CACHE PATH "Location of libraries" )
+
+# Export the targets to a file for use in the Config.cmake file
+install(EXPORT ${PROJECT_NAME}Targets
+    FILE "${PROJECT_NAME}Targets.cmake"
+    NAMESPACE ${PROJECT_NAME}::
+    DESTINATION lib/cmake
+)
+
+# Set alias for collective milk::milk_all target as well
+add_library(${PROJECT_NAME}_all INTERFACE)
+target_link_libraries(${PROJECT_NAME}_all INTERFACE ${libname})
+target_include_directories(${PROJECT_NAME}_all INTERFACE
+  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+  $<INSTALL_INTERFACE:include>
+)
+install(TARGETS ${PROJECT_NAME}_all EXPORT milkTargets)
+
+include(CMakePackageConfigHelpers)
+
+write_basic_package_version_file(
+    "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
+    VERSION ${PROJECT_VERSION}
+    COMPATIBILITY AnyNewerVersion
+)
+
+configure_package_config_file(
+    "${CMAKE_CURRENT_SOURCE_DIR}/Config.cmake.in"
+    "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
+    INSTALL_DESTINATION lib/cmake
+    PATH_VARS INCLUDE_INSTALL_DIR LIBRARY_INSTALL_DIR
+)
+
+# Install the Config.cmake and ConfigVersion.cmake files
+install(FILES
+    "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake"
+    "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
+    DESTINATION lib/cmake
+)
+
 
 # =======================================
 # PKG-CONFIG

Config.cmake.in

@@ -0,0 +1,10 @@
+@PACKAGE_INIT@
+
+# Import the targets from the generated export file
+include("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@Targets.cmake")
+
+# Set variables that other CMake projects will use
+set(@PROJECT_NAME@_FOUND TRUE)
+set(@PROJECT_NAME@_VERSION "@PROJECT_VERSION@")
+set_and_check(@PROJECT_NAME@_INCLUDE_DIR "@PACKAGE_INCLUDE_INSTALL_DIR@")
+set_and_check(@PROJECT_NAME@_LIBRARY_DIR "@PACKAGE_LIBRARY_INSTALL_DIR@")

plugins/milk-extra-src/ZernikePolyn/CMakeLists.txt

@@ -28,5 +28,5 @@ project(lib_${LIBNAME}_project)
 add_library(${LIBNAME} SHARED ${SOURCEFILES})
 target_link_libraries(${LIBNAME} PUBLIC CLIcore milkimagegen)
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})

plugins/milk-extra-src/clustering/CMakeLists.txt

@@ -57,11 +57,14 @@ project(lib_${LIBNAME}_project)
 #
 add_library(${LIBNAME} SHARED ${SRCNAME}.c ${SOURCEFILES})
 
-target_include_directories(${LIBNAME} PUBLIC ${PROJECT_SOURCE_DIR}/.. ${CMAKE_CURRENT_SOURCE_DIR})
+target_include_directories(${LIBNAME} PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/..>
+											$<INSTALL_INTERFACE:include>
+											$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+											$<INSTALL_INTERFACE:include/${SRCNAME}>)
 
 target_link_libraries(${LIBNAME} PRIVATE ${LINKLIBS})
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${SRCNAME}.h ${INCLUDEFILES} DESTINATION include/${SRCNAME})
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})
 install(PROGRAMS ${SCRIPTFILES} DESTINATION bin)

plugins/milk-extra-src/fft/CMakeLists.txt

@@ -63,5 +63,5 @@ target_link_libraries(${LIBNAME} PUBLIC ${FFTW_LIBRARIES} ${FFTWF_LIBRARIES} CLI
 
 set_target_properties(${LIBNAME} PROPERTIES COMPILE_FLAGS "-DFFTCONFIGDIR=\\\"${PROJECT_SOURCE_DIR}/config\\\"")
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})

plugins/milk-extra-src/image_basic/CMakeLists.txt

@@ -68,5 +68,5 @@ include_directories ("${PROJECT_SOURCE_DIR}/..")
 add_library(${LIBNAME} SHARED ${SOURCEFILES})
 target_link_libraries(${LIBNAME} PRIVATE CLIcore)
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})

plugins/milk-extra-src/image_filter/CMakeLists.txt

@@ -48,5 +48,5 @@ include_directories ("${PROJECT_SOURCE_DIR}/..")
 add_library(${LIBNAME} SHARED ${SOURCEFILES})
 target_link_libraries(${LIBNAME} PRIVATE CLIcore)
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})

plugins/milk-extra-src/image_format/CMakeLists.txt

@@ -58,7 +58,7 @@ include_directories ("${PROJECT_SOURCE_DIR}/..")
 add_library(${LIBNAME} SHARED ${SOURCEFILES})
 target_link_libraries(${LIBNAME} PRIVATE CLIcore)
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})
 
 

plugins/milk-extra-src/image_gen/CMakeLists.txt

@@ -38,10 +38,13 @@ project(lib_${LIBNAME}_project)
 #
 add_library(${LIBNAME} SHARED ${SRCNAME}.c ${SOURCEFILES})
 
-target_include_directories(${LIBNAME} PUBLIC ${PROJECT_SOURCE_DIR}/.. ${CMAKE_CURRENT_SOURCE_DIR})
+target_include_directories(${LIBNAME} PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/..>
+											$<INSTALL_INTERFACE:include>
+											$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+											$<INSTALL_INTERFACE:include/${SRCNAME}>)
 
 target_link_libraries(${LIBNAME} PRIVATE ${LINKLIBS})
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${SRCNAME}.h ${INCLUDEFILES} DESTINATION include/${SRCNAME})
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})

plugins/milk-extra-src/img_reduce/CMakeLists.txt

@@ -28,5 +28,5 @@ include_directories ("${PROJECT_SOURCE_DIR}/..")
 add_library(${LIBNAME} SHARED ${SOURCEFILES})
 target_link_libraries(${LIBNAME} PRIVATE CLIcore)
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})

plugins/milk-extra-src/info/CMakeLists.txt

@@ -58,13 +58,15 @@ include_directories ("${PROJECT_SOURCE_DIR}/..")
 add_library(${LIBNAME} SHARED ${SOURCEFILES})
 
 target_include_directories(${LIBNAME} PUBLIC
-	${CMAKE_CURRENT_SOURCE_DIR}/..
-	${CMAKE_CURRENT_SOURCE_DIR}
+	$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/..>
+	$<INSTALL_INTERFACE:include>
+	$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+	$<INSTALL_INTERFACE:include/${SRCNAME}>
 )
 
 target_link_libraries(${LIBNAME} PRIVATE ${LINKLIBS})
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})
 
 install(PROGRAMS ${SCRIPTS} DESTINATION bin)

plugins/milk-extra-src/kdtree/CMakeLists.txt

@@ -28,5 +28,5 @@ include_directories ("${PROJECT_SOURCE_DIR}/..")
 add_library(${LIBNAME} SHARED ${SOURCEFILES})
 target_link_libraries(${LIBNAME} PRIVATE CLIcore)
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})

plugins/milk-extra-src/linARfilterPred/CMakeLists.txt

@@ -85,5 +85,5 @@ target_link_libraries(${LIBNAME} PRIVATE CLIcore)
 
 
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})

plugins/milk-extra-src/linalgebra/CMakeLists.txt

@@ -166,6 +166,6 @@ target_link_libraries(${LIBNAME} PRIVATE CLIcore)
 message("---------------------------------------")
 
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})
 install(PROGRAMS ${SCRIPTS} DESTINATION bin)

plugins/milk-extra-src/linopt_imtools/CMakeLists.txt

@@ -56,7 +56,8 @@ include_directories ("${PROJECT_SOURCE_DIR}/..")
 # Convention: the main souce file is named <libname>.c
 #
 add_library(${LIBNAME} SHARED ${SRCNAME}.c ${SOURCEFILES})
-target_include_directories(${LIBNAME} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/..)
+target_include_directories(${LIBNAME} PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/..>
+											$<INSTALL_INTERFACE:include>)
 target_link_libraries(${LIBNAME} PRIVATE ${LINKLIBS})
 
 if(USE_CUDA)
@@ -87,6 +88,6 @@ target_compile_options(${LIBNAME} PUBLIC -DHAVE_CUDA -DHAVE_MAGMA -DUSE_MAGMA)
 endif(USE_MAGMA)
 
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${SRCNAME}.h ${INCLUDEFILES} DESTINATION include/${SRCNAME})
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})

plugins/milk-extra-src/psf/CMakeLists.txt

@@ -28,5 +28,5 @@ include_directories ("${PROJECT_SOURCE_DIR}/..")
 add_library(${LIBNAME} SHARED ${SOURCEFILES})
 target_link_libraries(${LIBNAME} PRIVATE CLIcore)
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})

plugins/milk-extra-src/statistic/CMakeLists.txt

@@ -28,5 +28,5 @@ include_directories ("${PROJECT_SOURCE_DIR}/..")
 add_library(${LIBNAME} SHARED ${SOURCEFILES})
 target_link_libraries(${LIBNAME} PRIVATE CLIcore)
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})

src/COREMOD_arith/CMakeLists.txt

@@ -127,10 +127,11 @@ if(${CFITSIO_FOUND})
   target_link_directories(${LIBNAME} PUBLIC ${CFITSIO_LIBRARY_DIRS})
 endif()
 
-target_include_directories(${LIBNAME} PUBLIC ${PROJECT_SOURCE_DIR}/..)
+target_include_directories(${LIBNAME} PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/..>
+											$<INSTALL_INTERFACE:include>)
 target_link_libraries(${LIBNAME} PUBLIC m ${CFITSIO_LIBRARIES})
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})
 
 install(PROGRAMS ${SCRIPTS} DESTINATION bin)

src/COREMOD_iofits/CMakeLists.txt

@@ -99,6 +99,6 @@ target_link_libraries(${LIBNAME} PRIVATE m ${CFITSIO_LIBRARIES})
 
 message(" CFITSIO_LIBRARIES : ${CFITSIO_LIBRARIES}")
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${SRCNAME}.h ${INCLUDEFILES} DESTINATION include/${SRCNAME})
 install(PROGRAMS ${SCRIPTFILES} DESTINATION bin)

src/COREMOD_memory/CMakeLists.txt

@@ -198,9 +198,10 @@ if(${CFITSIO_FOUND})
   target_link_directories(${LIBNAME} PUBLIC ${CFITSIO_LIBRARY_DIRS})
 endif()
 
-target_include_directories(${LIBNAME} PUBLIC ${PROJECT_SOURCE_DIR}/..)
+target_include_directories(${LIBNAME} PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/..>
+                                              $<INSTALL_INTERFACE:include>)
 target_link_libraries(${LIBNAME} PUBLIC m ${CFITSIO_LIBRARIES})
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})
 install(PROGRAMS ${SCRIPTFILES} DESTINATION bin)

src/COREMOD_tools/CMakeLists.txt

@@ -81,8 +81,9 @@ if(${CFITSIO_FOUND})
   target_link_directories(${LIBNAME} PUBLIC ${CFITSIO_LIBRARY_DIRS})
 endif()
 
-target_include_directories(${LIBNAME} PUBLIC ${PROJECT_SOURCE_DIR}/..)
+target_include_directories(${LIBNAME} PUBLIC $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/..>
+											$<INSTALL_INTERFACE:include>)
 target_link_libraries(${LIBNAME} PUBLIC ${CFITSIO_LIBRARIES})
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${INCLUDEFILES} DESTINATION include/${SRCNAME})

src/CommandLineInterface/CMakeLists.txt

@@ -153,7 +153,8 @@ if(${HWLOC_FOUND})
   target_compile_definitions(CLIcore PUBLIC USE_HWLOC)
 endif()
 target_include_directories(CLIcore
-                           PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}
+                           PUBLIC $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+                                  $<INSTALL_INTERFACE:include/${SRCNAME}>
                                   ${FFTW_INCLUDE_DIRS} ${FFTWF_INCLUDE_DIRS}
                                   ${HWLOC_INCLUDE_DIR} ${NCURSES_INCLUDE_DIR})
 target_compile_options(CLIcore PUBLIC)
@@ -169,7 +170,7 @@ if(${python_module})
   add_subdirectory(python_module)
 endif()
 
-install(TARGETS CLIcore DESTINATION lib)
+install(TARGETS CLIcore EXPORT milkTargets DESTINATION lib)
 
 
 install(FILES CLIcore.h

src/milk_module_example/CMakeLists.txt

@@ -52,6 +52,6 @@ add_library(${LIBNAME} SHARED ${SRCNAME}.c ${SOURCEFILES})
 target_include_directories(${LIBNAME} PRIVATE ${PROJECT_SOURCE_DIR}/.. ${CMAKE_CURRENT_SOURCE_DIR})
 target_link_libraries(${LIBNAME} PRIVATE ${LINKLIBS})
 
-install(TARGETS ${LIBNAME} DESTINATION lib)
+install(TARGETS ${LIBNAME} EXPORT milkTargets DESTINATION lib)
 install(FILES ${SRCNAME}.h ${INCLUDEFILES} DESTINATION include/${SRCNAME})
 install(PROGRAMS ${SCRIPTFILES} DESTINATION bin)