add pkg-config support (#340)

Adds generation of a pkg-config for installation, improving
dependency discover on Linux systems.

This fixes #339, which can be referenced for more information.

CMakeLists.txt

@@ -1000,6 +1000,13 @@ install(FILES
 
 include(tools/cmake/cpack.cmake)
 
+include(FindPkgConfig QUIET)
+if(PKG_CONFIG_FOUND)
+  configure_file("${PROJECT_SOURCE_DIR}/tools/pkg-config/stumpless.pc.in" "${PROJECT_BINARY_DIR}/tools/pkg-config/stumpless.pc" @ONLY)
+  install(FILES "${PROJECT_BINARY_DIR}/tools/pkg-config/stumpless.pc"
+    DESTINATION "${CMAKE_INSTALL_PREFIX}/lib/pkgconfig")
+endif()
+
 
 # functionality tests
 add_function_test(buffer

tools/pkg-config/stumpless.pc.in

@@ -0,0 +1,10 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
+Name: @CMAKE_PROJECT_NAME@
+Description: C logging library built for high performance and a rich feature set
+Version: @PROJECT_VERSION@
+Libs: -L${libdir} -lstumpless
+Cflags: -I${includedir}