From 51b9a076f0c5d0d40b2e9cf7d356b58ccc92e9fe Mon Sep 17 00:00:00 2001
From: Frederik Carlier <frederik.carlier@keysight.com>
Date: Wed, 27 Mar 2024 21:40:50 +0000
Subject: [PATCH] Generate CMake Configuration File

Installs:
- lib/cmake/libobjc/libobjcConfig.cmake
- lib/cmake/libobjc/libobjcTargets.cmake
- lib/cmake/libobjc/libobjcConfigVersion.cmake
- lib/cmake/libobjc/libobjcTargets-noconfig.cmake
---
 .gitignore      |  2 +-
 CMakeLists.txt  | 35 +++++++++++++++++++++++++++++++----
 Config.cmake.in |  3 +++
 3 files changed, 35 insertions(+), 5 deletions(-)
 create mode 100644 Config.cmake.in

diff --git a/.gitignore b/.gitignore
index 5ff7c15..a69c57e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 *~
 .*.sw?
-Build
+[b|B]uild
 Debug
 Release
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 19e1e75..b3ad99d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -250,13 +250,13 @@ list(APPEND libobjc_CXX_SRCS ${libobjcxx_CXX_SRCS})
 target_sources(objc PRIVATE ${libobjc_CXX_SRCS})
 
 include(FindThreads)
-target_link_libraries(objc Threads::Threads)
+target_link_libraries(objc PUBLIC Threads::Threads)
 # Link against ntdll.dll for RtlRaiseException
 if (WIN32 AND NOT MINGW)
-	target_link_libraries(objc ntdll.dll)
+	target_link_libraries(objc PUBLIC ntdll.dll)
 endif()
 
-target_link_libraries(objc tsl::robin_map)
+target_link_libraries(objc PRIVATE tsl::robin_map)
 
 set_target_properties(objc PROPERTIES
 	LINKER_LANGUAGE C
@@ -278,7 +278,7 @@ endif ()
 
 # Explicitly link libm, as an implicit dependency of the C++ runtime
 if (M_LIBRARY)
-	target_link_libraries(objc ${M_LIBRARY})
+	target_link_libraries(objc PUBLIC ${M_LIBRARY})
 endif ()
 
 # Make weak symbols work on OS X
@@ -340,10 +340,17 @@ else ()
 endif ()
 message(STATUS "GNUstep install type set to ${GNUSTEP_INSTALL_TYPE}")
 
+target_include_directories(
+	objc
+	INTERFACE
+	$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+	$<INSTALL_INTERFACE:include>)
 install(TARGETS ${INSTALL_TARGETS}
+	EXPORT libobjcTargets
 	RUNTIME DESTINATION ${BIN_INSTALL_PATH}
 	LIBRARY DESTINATION ${LIB_INSTALL_PATH}
 	ARCHIVE DESTINATION ${LIB_INSTALL_PATH})
+
 install(FILES ${libobjc_HDRS}
 	DESTINATION "${HEADER_INSTALL_PATH}/${INCLUDE_DIRECTORY}")
 install(FILES ${libBlocksRuntime_COMPATIBILITY_HDRS}
@@ -366,6 +373,26 @@ if (UNIX)
 endif ()
 include (CPack)
 
+# CMake Configuration File
+
+install(EXPORT libobjcTargets
+	FILE libobjcTargets.cmake
+	DESTINATION ${LIB_INSTALL_PATH}/cmake/libobjc)
+include(CMakePackageConfigHelpers)
+configure_package_config_file(${CMAKE_CURRENT_SOURCE_DIR}/Config.cmake.in
+	"${CMAKE_CURRENT_BINARY_DIR}/libobjcConfig.cmake"
+	INSTALL_DESTINATION "${LIB_INSTALL_PATH}/cmake/libobjc"
+	NO_SET_AND_CHECK_MACRO
+	NO_CHECK_REQUIRED_COMPONENTS_MACRO)
+write_basic_package_version_file(
+	"${CMAKE_CURRENT_BINARY_DIR}/libobjcConfigVersion.cmake"
+	VERSION "${CPACK_PACKAGE_VERSION_MAJOR}.${CPACK_PACKAGE_VERSION_MINOR}"
+	COMPATIBILITY AnyNewerVersion)
+install(FILES
+	${CMAKE_CURRENT_BINARY_DIR}/libobjcConfig.cmake
+	${CMAKE_CURRENT_BINARY_DIR}/libobjcConfigVersion.cmake
+	DESTINATION ${LIB_INSTALL_PATH}/cmake/libobjc)
+
 # pkg-config descriptor
 
 set(PC_LIBS_PRIVATE ${CMAKE_CXX_IMPLICIT_LINK_LIBRARIES})
diff --git a/Config.cmake.in b/Config.cmake.in
new file mode 100644
index 0000000..8b40091
--- /dev/null
+++ b/Config.cmake.in
@@ -0,0 +1,3 @@
+@PACKAGE_INIT@
+
+include ( "${CMAKE_CURRENT_LIST_DIR}/libobjcTargets.cmake" )