Add cmake support

Adds modern CMake support, allowing SheenBidi to be used as a subproject
from a CMake project (e.g. via `FetchContent`).

CMakeLists.txt

@@ -0,0 +1,89 @@
+cmake_minimum_required(VERSION 3.16)
+
+project(sheenbidi VERSION 2.8 LANGUAGES C CXX)
+
+option(ENABLE_INSTALL "Enable install targets" ON)
+
+set(CMAKE_CXX_STANDARD 20)
+set(CMAKE_CXX_EXTENSIONS OFF)
+set(CMAKE_CXX_STANDARD_REQUIRED OFF)
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON) # for clang-tidy
+set(CMAKE_INTERPROCEDURAL_OPTIMIZATION_RELEASE ON)
+
+set(_public_headers
+  Headers/SBAlgorithm.h
+  Headers/SBBase.h
+  Headers/SBBidiType.h
+  Headers/SBCodepoint.h
+  Headers/SBCodepointSequence.h
+  Headers/SBGeneralCategory.h
+  Headers/SBLine.h
+  Headers/SBMirrorLocator.h
+  Headers/SBParagraph.h
+  Headers/SBRun.h
+  Headers/SBScript.h
+  Headers/SBScriptLocator.h
+  Headers/SheenBidi.h
+)
+add_library(
+  sheenbidi
+  Source/SheenBidi.c
+)
+target_include_directories(sheenbidi PUBLIC
+  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/Headers>
+  $<INSTALL_INTERFACE:include/SheenBidi>
+)
+target_include_directories(sheenbidi PRIVATE Source)
+set_target_properties(sheenbidi PROPERTIES PUBLIC_HEADER "${_public_headers}")
+target_compile_definitions(sheenbidi PRIVATE SB_CONFIG_UNITY)
+add_library(SheenBidi::sheenbidi ALIAS sheenbidi)
+
+if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
+  target_link_libraries(sheenbidi PUBLIC "-static-libgcc -static-libstdc++")
+endif()
+
+if(ENABLE_INSTALL)
+  install(
+    TARGETS sheenbidi
+    EXPORT SheenBidiTargets
+    PUBLIC_HEADER
+    CONFIGURATIONS Release
+    DESTINATION include/SheenBidi
+  )
+
+  if(NOT DEFINED LIB_INSTALL_DIR)
+    set(LIB_INSTALL_DIR lib)
+  endif()
+  set(ConfigPackageLocation "${LIB_INSTALL_DIR}/cmake/SheenBidi")
+
+  include(CMakePackageConfigHelpers)
+  configure_package_config_file(cmake/SheenBidi.cmake.in
+    "${CMAKE_CURRENT_BINARY_DIR}/SheenBidi/SheenBidiConfig.cmake"
+    INSTALL_DESTINATION ${ConfigPackageLocation})
+  write_basic_package_version_file(
+    "${CMAKE_CURRENT_BINARY_DIR}/SheenBidi/SheenBidiConfigVersion.cmake"
+    VERSION ${SheenBidi_VERSION}
+    COMPATIBILITY AnyNewerVersion
+  )
+
+  export(EXPORT SheenBidiTargets
+    FILE "${CMAKE_CURRENT_BINARY_DIR}/SheenBidi/SheenBidiTargets.cmake"
+    NAMESPACE SheenBidi::
+  )
+
+  install(EXPORT SheenBidiTargets
+    FILE
+      SheenBidiTargets.cmake
+    NAMESPACE
+      SheenBidi::
+    DESTINATION
+      ${ConfigPackageLocation}
+  )
+  install(
+    FILES
+      "${CMAKE_CURRENT_BINARY_DIR}/SheenBidi/SheenBidiConfig.cmake"
+      "${CMAKE_CURRENT_BINARY_DIR}/SheenBidi/SheenBidiConfigVersion.cmake"
+    DESTINATION
+      ${ConfigPackageLocation}
+  )
+endif()

cmake/SheenBidi.cmake.in

@@ -0,0 +1,5 @@
+@PACKAGE_INIT@
+
+check_required_components(SheenBidi)
+
+include("${CMAKE_CURRENT_LIST_DIR}/@[email protected]")