fix /usr/local/lib hack in CMakeLists

.gitignore

@@ -16,4 +16,6 @@ Makefile
 CTestTestFile.cmake
 Testing
 cmake_install.cmake
+phosgConfig.cmake
+phosgConfigVersion.cmake
 install_manifest.txt

CMakeLists.txt

@@ -1,4 +1,5 @@
-cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.27)
+
 
 
 
@@ -7,6 +8,8 @@ cmake_minimum_required(VERSION 3.10)
 set(CMAKE_OSX_ARCHITECTURES arm64;x86_64)
 
 project(phosg)
+include(GNUInstallDirs)
+include(CMakePackageConfigHelpers)
 
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
@@ -22,30 +25,32 @@ set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 set(CMAKE_BUILD_TYPE Debug)
 set(CTEST_OUTPUT_ON_FAILURE ON)
 
-include_directories("/usr/local/include")
-link_directories("/usr/local/lib")
-
 
 
 # Library and executable definitions
 
 add_library(
-    phosg
-    src/Arguments.cc
-    src/Encoding.cc
-    src/Filesystem.cc
-    src/Hash.cc
-    src/Image.cc
-    src/JSON.cc
-    src/Network.cc
-    src/Process.cc
-    src/Random.cc
-    src/Strings.cc
-    src/Time.cc
-    src/Tools.cc
-    src/UnitTest.cc
+  phosg
+  src/Arguments.cc
+  src/Encoding.cc
+  src/Filesystem.cc
+  src/Hash.cc
+  src/Image.cc
+  src/JSON.cc
+  src/Network.cc
+  src/Process.cc
+  src/Random.cc
+  src/Strings.cc
+  src/Time.cc
+  src/Tools.cc
+  src/UnitTest.cc
 )
 target_link_libraries(phosg pthread z)
+target_include_directories(
+  phosg PUBLIC
+  "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>"
+  "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
+)
 
 # It seems that on some Linux variants (e.g. Raspbian) we also need -latomic,
 # but this library does not exist on others (e.g. Ubuntu) nor on macOS
@@ -89,12 +94,50 @@ endforeach()
 
 # Installation configuration
 
+# Package setup
+install(
+  TARGETS phosg
+  EXPORT phosg
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+  INCLUDES DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+)
+
+# Header files
 file(GLOB Headers ${CMAKE_SOURCE_DIR}/src/*.hh)
-install(TARGETS phosg EXPORT phosg DESTINATION lib)
+install(FILES ${Headers} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/phosg)
+
+# Export definition
+install(
+  EXPORT phosg
+  FILE phosg.cmake
+  NAMESPACE phosg::
+  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/phosg
+)
+
+# CMake config files
+configure_package_config_file(${CMAKE_CURRENT_SOURCE_DIR}/phosgConfig.cmake.in
+  "${CMAKE_CURRENT_BINARY_DIR}/phosgConfig.cmake"
+  INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/phosg
+)
+set(version 0.1)
+set_property(TARGET phosg PROPERTY VERSION ${version})
+set_property(TARGET phosg PROPERTY SOVERSION 0)
+set_property(TARGET phosg PROPERTY INTERFACE_phosg_MAJOR_VERSION 0)
+set_property(TARGET phosg APPEND PROPERTY COMPATIBLE_INTERFACE_STRING phosg_MAJOR_VERSION)
+write_basic_package_version_file(
+  "${CMAKE_CURRENT_BINARY_DIR}/phosgConfigVersion.cmake"
+  VERSION "${version}"
+  COMPATIBILITY AnyNewerVersion
+)
+install(
+  FILES "${CMAKE_CURRENT_BINARY_DIR}/phosgConfig.cmake" "${CMAKE_CURRENT_BINARY_DIR}/phosgConfigVersion.cmake"
+  DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/phosg
+)
+
+# Executables (separate from package definition)
 install(TARGETS bindiff DESTINATION bin)
 install(TARGETS jsonformat DESTINATION bin)
 install(TARGETS parse-data DESTINATION bin)
 install(TARGETS phosg-png-conv DESTINATION bin)
-install(FILES ${Headers} DESTINATION include/phosg)
-install(FILES phosg-config.cmake DESTINATION lib)
-install(EXPORT phosg DESTINATION lib)

phosgConfig.cmake.in

@@ -0,0 +1,3 @@
+@PACKAGE_INIT@
+include("${CMAKE_CURRENT_LIST_DIR}/phosg.cmake")
+check_required_components(phosg)