fixed pkg-config

CMakeLists.txt

@@ -4,6 +4,7 @@ cmake_minimum_required(VERSION 3.14.7)
 project(cargs
   VERSION 1.1.0
   DESCRIPTION "A simple argument parser library"
+  HOMEPAGE_URL "https://likle.github.io/cargs/"
   LANGUAGES C)
 
 # include utilities
@@ -108,6 +109,10 @@ configure_package_config_file("cmake/CargsConfig.cmake.in"
 write_basic_package_version_file(
   ${CMAKE_CURRENT_BINARY_DIR}/CargsConfigVersion.cmake
   COMPATIBILITY SameMajorVersion)
+configure_file(
+  ${CMAKE_CURRENT_SOURCE_DIR}/cargs.pc.in
+  ${CMAKE_CURRENT_BINARY_DIR}/cargs.pc
+  @ONLY)
 
 # installing
 install(TARGETS cargs
@@ -117,5 +122,8 @@ install(FILES
   ${CMAKE_CURRENT_BINARY_DIR}/CargsConfig.cmake
   ${CMAKE_CURRENT_BINARY_DIR}/CargsConfigVersion.cmake
   DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/cargs)
+install(FILES
+  ${CMAKE_CURRENT_BINARY_DIR}/cargs.pc
+  DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig)
 install(EXPORT CargsTargets
   DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/cargs)

cargs.pc.in

@@ -1,7 +1,11 @@
-prefix="@CMAKE_INSTALL_PREFIX@"
+prefix=@CMAKE_INSTALL_PREFIX@
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
 Name: @PROJECT_NAME@
 Description: @CMAKE_PROJECT_DESCRIPTION@
 URL: @CMAKE_PROJECT_HOMEPAGE_URL@
 Version: @PROJECT_VERSION@
-Cflags: -I"${includedir}"
-Libs: -L"${prefix}/lib" -lcargs
+Libs: -L${libdir} -lcargs
+Cflags: -I${includedir}