add pc-file and installing part

Author: pmfoss

CMakeLists.txt

@@ -2,15 +2,45 @@ cmake_minimum_required(VERSION 3.15)
 
 project(
   ProcessInfo
-  VERSION 0.1
+  VERSION 1.0.0
   LANGUAGES CXX)
 
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_EXTENSIONS OFF)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-include_directories(src)
-link_directories(${CMAKE_BINARY_DIR}/src)
+include(GNUInstallDirs)
+
+option(PROCESSINFO_PKGCONFIG "Build pkg-config .pc file for ProcessInfo library." OFF)
+option(PROCESSINFO_EXAMPLES "Build examples for ProcessInfo library." OFF)
+
+set(INCLUDE_INSTALL_DIR
+      "${CMAKE_INSTALL_INCLUDEDIR}/ProcessInfo"
+	  CACHE PATH "The directory relative to CMAKE_INSTALL_PREFIX where ProcessInfo header files are installed")
+
+
+set(PKGCONFIG_INSTALL_DIR
+    "${CMAKE_INSTALL_DATADIR}/pkgconfig"
+    CACHE PATH "The directory relative to CMAKE_INSTALL_PREFIX where processinfo.pc is installed"
+   )
+
+foreach(var INCLUDE_INSTALL_DIR CMAKEPACKAGE_INSTALL_DIR PKGCONFIG_INSTALL_DIR)
+  # If an absolute path is specified, make it relative to "{CMAKE_INSTALL_PREFIX}".
+  if(IS_ABSOLUTE "${${var}}")
+    file(RELATIVE_PATH "${var}" "${CMAKE_INSTALL_PREFIX}" "${${var}}")
+  endif()
+endforeach()
 
 add_subdirectory(src)
-add_subdirectory(examples)
+
+if(PROCESSINFO_EXAMPLES)
+    include_directories(src)
+    link_directories(${CMAKE_BINARY_DIR}/src)
+    add_subdirectory(examples)
+endif()
+
+if(COROUTINECLASSES_PKGCONFIG)
+    configure_file(processinfo.pc.in processinfo.pc @ONLY)
+    install(FILES ${CMAKE_CURRENT_BINARY_DIR}/processinfo.pc
+        DESTINATION ${PKGCONFIG_INSTALL_DIR})
+endif()

processinfo.pc.in

@@ -0,0 +1,8 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+
+Name: ProcessInfo
+Description: A platform-independent library for reading process data.
+Version: 1.0.0
+Libs: -L${libdir} -lProcessInfo
+Cflags: -I${prefix}/@INCLUDE_INSTALL_DIR@

src/CMakeLists.txt

@@ -1,10 +1,44 @@
-SET(LIBRARY_SRC_FILES
-   PIAbstractProcessInfoReader.cpp)
+#declare source and header files
+set( SOURCE_FILES 
+         PIAbstractProcessInfoReader.cpp
+   )
+
+set( HEADER_FILES 
+        PIAbstractProcessInfoReader.h
+		PIProcessInfo.h
+		PIProcessInfoReader.h
+   )
+
+set( HEADER_FILES_PRIVATE
+
+   )
 
 if(${CMAKE_SYSTEM_NAME} STREQUAL "Linux")
-   list(APPEND LIBRARY_SRC_FILES PILinuxProcessInfoReader.cpp)
+   list(APPEND HEADER_FILES PILinuxProcessInfoReader.h)
+   list(APPEND SOURCE_FILES PILinuxProcessInfoReader.cpp)
 elseif(${CMAKE_SYSTEM_NAME} STREQUAL "Windows")
-   list(APPEND LIBRARY_SRC_FILES PIWindowsProcessInfoReader.cpp)
+   list(APPEND HEADER_FILES PIWindowsProcessInfoReader.h)
+   list(APPEND HEADER_FILES_PRIVATE WindowsNtApi.h)
+   list(APPEND SOURCE_FILES PIWindowsProcessInfoReader.cpp)
 endif()
 
-add_library(ProcessInfo STATIC ${LIBRARY_SRC_FILES})
+#declare library target
+add_library(ProcessInfo STATIC)
+
+#set target sources
+target_sources(ProcessInfo
+                   PRIVATE ${SOURCE_FILES} ${HEADER_FILES_PRIVATE}
+				   PUBLIC ${HEADER_FILES}
+			  )	   
+			  
+#set target includes
+target_include_directories(ProcessInfo PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
+
+#install target
+install(
+           TARGETS ProcessInfo
+           EXPORT ProcessInfo
+           ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+        )
+
+install(FILES ${HEADER_FILES} DESTINATION ${INCLUDE_INSTALL_DIR})