Export CMake config from meson

Author: awvwgk

.github/workflows/build.yml

@@ -198,6 +198,18 @@ jobs:
         ninja -C ${{ env.BUILD_DIR }} install
         echo "MCTCLIB_PREFIX=$PWD/_dist" >> $GITHUB_ENV
 
+    - name: Discover installed files (CMake)
+      if: ${{ matrix.build != 'fpm' }}
+      run: |
+        cmake -S test/export -B ${{ env.BUILD_DIR }}/discover-cmake -G Ninja -DCMAKE_PREFIX_PATH=$PWD/_dist/lib/cmake
+        cmake --build ${{ env.BUILD_DIR }}/discover-cmake
+
+    - name: Discover installed files (Meson)
+      if: ${{ matrix.build != 'fpm' }}
+      run: |
+        meson setup ${{ env.BUILD_DIR }}/discover-meson test/export --pkg-config-path=$PWD/_dist/lib/pkgconfig
+        meson compile -C ${{ env.BUILD_DIR }}/discover-meson
+
     - name: Create package
       if: ${{ matrix.build == 'meson' }}
       run: |

CMakeLists.txt

@@ -28,7 +28,7 @@ include(GNUInstallDirs)
 add_subdirectory("config")
 
 # Dependencies
-if(NOT TARGET "jonquild::jonquil" AND WITH_JSON)
+if(NOT TARGET "jonquil::jonquil" AND MCTCLIB_WITH_JSON)
   find_package("toml-f" REQUIRED)
   find_package("jonquil" REQUIRED)
 endif()
@@ -42,12 +42,13 @@ add_library(
   "${PROJECT_NAME}-lib"
   "${srcs}"
 )
+add_library("${PROJECT_NAME}::${PROJECT_NAME}-lib" ALIAS "${PROJECT_NAME}-lib")
 target_compile_definitions(
   "${PROJECT_NAME}-lib"
   PRIVATE
   "WITH_JSON=$<BOOL:${WITH_JSON}>"
 )
-if(WITH_OpenMP)
+if(MCTCLIB_WITH_OpenMP)
   find_package(OpenMP REQUIRED)
   target_link_libraries(
     "${PROJECT_NAME}-lib"
@@ -89,6 +90,7 @@ add_subdirectory("app")
 
 # Export targets for other projects
 add_library("${PROJECT_NAME}" INTERFACE)
+add_library("${PROJECT_NAME}::${PROJECT_NAME}" ALIAS "${PROJECT_NAME}")
 target_link_libraries("${PROJECT_NAME}" INTERFACE "${PROJECT_NAME}-lib")
 install(
   TARGETS

config/CMakeLists.txt

@@ -14,8 +14,16 @@
 
 option(BUILD_SHARED_LIBS "Whether the libraries built should be shared" FALSE)
 
-option(WITH_OpenMP "Enable support for shared memory parallelisation with OpenMP" TRUE)
-option(WITH_JSON "Enable support for JSON parsing via jonquil" FALSE)
+if(NOT DEFINED WITH_OpenMP)
+  set(WITH_OpenMP TRUE)
+endif()
+if(NOT DEFINED WITH_JSON)
+  set(WITH_JSON FALSE)
+endif()
+option(MCTCLIB_WITH_OpenMP "Enable support for shared memory parallelisation with OpenMP" ${WITH_OpenMP})
+option(MCTCLIB_WITH_JSON "Enable support for JSON parsing via jonquil" ${WITH_JSON})
+set(MCTCLIB_USE_JONQUIL ${MCTCLIB_WITH_JSON})
+set(MCTCLIB_USE_TOMLF ${MCTCLIB_WITH_JSON})
 
 set(
   "${PROJECT_NAME}-module-dir"
@@ -65,7 +73,7 @@ endif()
 
 include(CMakePackageConfigHelpers)
 configure_package_config_file(
-  "${CMAKE_CURRENT_SOURCE_DIR}/template.cmake"
+  "${CMAKE_CURRENT_SOURCE_DIR}/template-config.cmake"
   "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake"
   INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
 )

config/template-config.cmake

@@ -0,0 +1,12 @@
+@PACKAGE_INIT@
+
+set(MCTCLIB_WITH_OpenMP @MCTCLIB_WITH_OpenMP@)
+set(MCTCLIB_WITH_JSON @MCTCLIB_WITH_JSON@)
+set(MCTCLIB_USE_JONQUIL @MCTCLIB_USE_JONQUIL@)
+set(MCTCLIB_USE_TOMLF @MCTCLIB_USE_TOMLF@)
+
+enable_language("Fortran")
+
+if(NOT TARGET "@PROJECT_NAME@::@PROJECT_NAME@")
+  include("${CMAKE_CURRENT_LIST_DIR}/@PROJECT_NAME@-targets.cmake")
+endif()

config/template-targets.cmake

@@ -0,0 +1,24 @@
+set(CMAKE_IMPORT_FILE_VERSION 1)
+
+set(
+  MCTCLIB_INCLUDEDIRS
+  "@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_INCLUDEDIR@"
+  "@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_INCLUDEDIR@/@module-dir@"
+)
+find_library(
+  MCTCLIB_LIBRARIES
+  "@PROJECT_NAME@"
+  PATHS "@CMAKE_INSTALL_PREFIX@/@CMAKE_INSTALL_LIBDIR@"
+  NO_DEFAULT_PATH
+)
+set(
+  MCTCLIB_DEPENDENCIES
+  "$<$<BOOL:${MCTCLIB_USE_JONQUIL}>:jonquil::jonquil>"
+  "$<$<BOOL:${MCTCLIB_USE_TOMLF}>:toml-f::toml-f>"
+  "$<$<BOOL:${MCTCLIB_WITH_OpenMP}>:OpenMP::OpenMP_Fortran>"
+)
+
+add_library(@PROJECT_NAME@::@PROJECT_NAME@-lib INTERFACE IMPORTED)
+add_library(@PROJECT_NAME@::@PROJECT_NAME@ ALIAS @PROJECT_NAME@::@PROJECT_NAME@-lib)
+target_link_libraries(@PROJECT_NAME@::@PROJECT_NAME@-lib INTERFACE ${MCTCLIB_LIBRARIES} ${MCTCLIB_DEPENDENCIES})
+target_include_directories(@PROJECT_NAME@::@PROJECT_NAME@-lib INTERFACE ${MCTCLIB_INCLUDEDIRS})

config/template.cmake

@@ -87,6 +87,37 @@ if install
     subdirs: ['', module_id],
   )
 
+  cmake_data = configuration_data({
+    'PROJECT_NAME': meson.project_name(),
+    'PROJECT_VERSION': meson.project_version(),
+    'PACKAGE_INIT': '',
+    'CMAKE_INSTALL_PREFIX': get_option('prefix'),
+    'CMAKE_INSTALL_INCLUDEDIR': get_option('includedir'),
+    'CMAKE_INSTALL_LIBDIR': get_option('libdir'),
+    'MCTCLIB_WITH_OpenMP': get_option('openmp') ? 'ON' : 'OFF',
+    'MCTCLIB_WITH_JSON': get_option('json') ? 'ON' : 'OFF',
+    'MCTCLIB_USE_JONQUIL': 'OFF',
+    'MCTCLIB_USE_TOMLF': 'OFF',
+    'module-dir': module_id,
+  })
+  cmake_files = [
+    configure_file(
+      input: files('config'/'template-config.cmake'),
+      output: meson.project_name() + '-config.cmake',
+      configuration: cmake_data,
+    ),
+    configure_file(
+      input: files('config'/'template-targets.cmake'),
+      output: meson.project_name() + '-targets.cmake',
+      configuration: cmake_data,
+    ),
+  ]
+  install_data(
+    cmake_files,
+    install_dir: get_option('libdir')/'cmake'/meson.project_name(),
+    install_tag: 'devel',
+  )
+
   asciidoc = find_program('asciidoctor', required: false)
   if asciidoc.found()
     install_man(