create pkgconfig file during build

CMakeLists.txt

@@ -96,13 +96,22 @@ if(CEREAL_INSTALL)
     else()
         write_basic_package_version_file("${versionFile}" COMPATIBILITY SameMajorVersion)
     endif()
+    configure_file(
+        ${CMAKE_CURRENT_SOURCE_DIR}/${PROJECT_NAME}.pc.in
+        ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc
+        @ONLY
+    )
 
     install(FILES ${configFile} ${versionFile} DESTINATION ${configInstallDestination})
     install(
         EXPORT ${PROJECT_NAME}Targets
         NAMESPACE "cereal::"
         DESTINATION ${configInstallDestination}
     )
+    install(
+        FILES ${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}.pc
+        DESTINATION ${CMAKE_INSTALL_DATAROOTDIR}/pkgconfig
+    )
 endif()
 
 

cereal.pc.in

@@ -0,0 +1,8 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+includedir=${prefix}/@CMAKE_INSTALL_INCLUDEDIR@
+
+Name: @PROJECT_NAME@
+Description: cereal is a header-only C++11 serialization library
+URL: https://uscilab.github.io/cereal/
+Version: @PROJECT_VERSION@
+Cflags: -I"${includedir}"