Add pkg-config and CMake package support for MITIE

Add directives for mitie.pc, mitie-config.cmake and mitie-version.cmake metadata generation and install rules for package discovery

Author: peter277

mitielib/CMakeLists.txt

@@ -2,8 +2,8 @@
 # This is a CMake makefile.  You can find the cmake utility and
 # information about it at http://www.cmake.org
 #
-cmake_minimum_required(VERSION 3.10)
-project(mitie C CXX)
+cmake_minimum_required(VERSION 3.12)
+project(mitie VERSION 0.7 LANGUAGES C CXX)
 
 
 include(tell_visual_studio_to_use_static_runtime.cmake)
@@ -64,4 +64,37 @@ if (NOT TARGET mitie)
            FILES_MATCHING REGEX ".*\.h(pp)?$"
            )
 
+
+   include(CMakePackageConfigHelpers)
+
+   #
+   # Generate metadata for pkg-config
+   #
+   configure_file("${CMAKE_CURRENT_SOURCE_DIR}/mitie.pc.in"
+      "${CMAKE_CURRENT_BINARY_DIR}/mitie.pc"
+      @ONLY)
+   
+   install(FILES "${CMAKE_CURRENT_BINARY_DIR}/mitie.pc"
+      DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+
+   #
+   # Generate metadata for CMake package
+   #
+   configure_package_config_file(
+      ${CMAKE_CURRENT_SOURCE_DIR}/mitie-config.cmake.in
+      ${CMAKE_CURRENT_BINARY_DIR}/mitie-config.cmake
+      INSTALL_DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/mitie
+   )
+
+   write_basic_package_version_file(
+      ${CMAKE_CURRENT_BINARY_DIR}/mitie-version.cmake
+      VERSION ${MITIE_VERSION}
+      COMPATIBILITY SameMajorVersion
+   )
+
+   install(FILES ${CMAKE_CURRENT_BINARY_DIR}/mitie-config.cmake
+      ${CMAKE_CURRENT_BINARY_DIR}/mitie-version.cmake
+      DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/mitie
+   )
+
 endif()

mitielib/mitie-config.cmake.in

@@ -0,0 +1,16 @@
+set(MITIE_SHARED_LIB @BUILD_SHARED_LIBS@)
+
+@PACKAGE_INIT@
+
+find_package(dlib REQUIRED)
+
+find_library(mitie_LIBRARY mitie REQUIRED)
+
+add_library(mitie::mitie UNKNOWN IMPORTED)
+set_target_properties(mitie::mitie
+   PROPERTIES
+      IMPORTED_LOCATION "${mitie_LIBRARY}"
+      IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
+      INTERFACE_LINK_LIBRARIES "dlib::dlib"
+      POSITION_INDEPENDENT_CODE ON
+)

mitielib/mitie.pc.in

@@ -0,0 +1,11 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
+libdir=${prefix}/@CMAKE_INSTALL_LIBDIR@
+
+Name: mitie
+Description: MIT Information Extraction Library
+Version: @PROJECT_VERSION@
+Requires: dlib-1
+Cflags: -I${includedir}
+Libs: -L${libdir} -lmitie