Revert "fix: simplified pkgconfig generation"

This reverts commit c7393f75c3.

CMakeLists.txt

@@ -157,6 +157,20 @@ install(EXPORT      ${PROJECT_NAME}
         NAMESPACE   ${PROJECT_NAME}::
         DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME})
 
+set(PACKAGE_NAME ${PROJECT_NAME})
+set(prefix ${CMAKE_INSTALL_PREFIX})
+set(exec_prefix ${CMAKE_INSTALL_PREFIX})
+if (IS_ABSOLUTE "${CMAKE_INSTALL_INCLUDEDIR}")
+  set(includedir "${CMAKE_INSTALL_INCLUDEDIR}")
+else()
+  set(includedir "\${prefix}/${CMAKE_INSTALL_INCLUDEDIR}")
+endif()
+if (IS_ABSOLUTE "${CMAKE_INSTALL_LIBDIR}")
+  set(libdir "${CMAKE_INSTALL_LIBDIR}")
+else()
+  set(libdir "\${exec_prefix}/${CMAKE_INSTALL_LIBDIR}")
+endif()
+set(PACKAGE_VERSION "${PROJECT_VERSION}")
 configure_file(cglm.pc.in cglm.pc @ONLY)
 
 install(FILES ${CMAKE_CURRENT_BINARY_DIR}/cglm.pc

cglm.pc.in

@@ -1,11 +1,11 @@
-prefix=@CMAKE_INSTALL_PREFIX@
-exec_prefix="${prefix}"
-libdir="${exec_prefix}/lib"
-includedir="${prefix}/include"
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
 
-Name: @PROJECT_NAME@
-Description: @CMAKE_PROJECT_DESCRIPTION@
-URL: @CMAKE_PROJECT_HOMEPAGE_URL@
-Version: @PROJECT_VERSION@
+Name: @PACKAGE_NAME@
+Description: OpenGL Mathematics (glm) for C
+URL: https://github.com/recp/cglm
+Version: @PACKAGE_VERSION@
 Cflags: -I${includedir}
 Libs: -L${libdir} -lcglm @LIBS@