Produce CMake config even for non top-level builds (#755)

Signed-off-by: Juan Cruz Viotti <[email protected]>

CMakeLists.txt

@@ -20,23 +20,20 @@ option(JSONBINPACK_DOCS "Build the JSON BinPack documentation" OFF)
 option(JSONBINPACK_ADDRESS_SANITIZER "Build JSON BinPack with an address sanitizer" OFF)
 option(JSONBINPACK_UNDEFINED_SANITIZER "Build JSON BinPack with an undefined behavior sanitizer" OFF)
 
-# TODO: Test CMake config
-if(PROJECT_IS_TOP_LEVEL)
-  include(GNUInstallDirs)
-  include(CMakePackageConfigHelpers)
-  configure_package_config_file(
-    config.cmake.in
-    "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake"
-    INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
-  write_basic_package_version_file(
-    "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config-version.cmake"
-    COMPATIBILITY SameMajorVersion)
-  install(FILES
-    "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config-version.cmake"
-    "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake"
-    DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
-    COMPONENT sourcemeta_jsonbinpack_dev)
-endif()
+include(GNUInstallDirs)
+include(CMakePackageConfigHelpers)
+configure_package_config_file(
+  config.cmake.in
+  "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake"
+  INSTALL_DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
+write_basic_package_version_file(
+  "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config-version.cmake"
+  COMPATIBILITY SameMajorVersion)
+install(FILES
+  "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config-version.cmake"
+  "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}-config.cmake"
+  DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}"
+  COMPONENT sourcemeta_jsonbinpack_dev)
 
 # Dependencies
 find_package(JSONToolkit REQUIRED)