cmake: Install new .pc files

Includes a small refactor to make adding filenames simpler.

c++/CMakeLists.txt

@@ -120,23 +120,26 @@ if(NOT MSVC)  # Don't install pkg-config files when building with MSVC
   set(PTHREAD_CFLAGS "-pthread")
   set(STDLIB_FLAG)  # TODO: Unsupported
 
-  configure_file(kj.pc.in "${CMAKE_CURRENT_BINARY_DIR}/kj.pc" @ONLY)
-  install(FILES "${CMAKE_CURRENT_BINARY_DIR}/kj.pc" DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
-
-  configure_file(capnp.pc.in "${CMAKE_CURRENT_BINARY_DIR}/capnp.pc" @ONLY)
-  install(FILES "${CMAKE_CURRENT_BINARY_DIR}/capnp.pc" DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+  set(CAPNP_PKG_CONFIG_FILES
+    pkgconfig/kj.pc
+    pkgconfig/capnp.pc
+  )
 
   if(NOT CAPNP_LITE)
-    configure_file(kj-async.pc.in "${CMAKE_CURRENT_BINARY_DIR}/kj-async.pc" @ONLY)
-    install(FILES "${CMAKE_CURRENT_BINARY_DIR}/kj-async.pc" DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
-
-    configure_file(capnp-rpc.pc.in "${CMAKE_CURRENT_BINARY_DIR}/capnp-rpc.pc" @ONLY)
-    install(FILES "${CMAKE_CURRENT_BINARY_DIR}/capnp-rpc.pc" DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
-
-    configure_file(capnp-json.pc.in "${CMAKE_CURRENT_BINARY_DIR}/capnp-json.pc" @ONLY)
-    install(FILES "${CMAKE_CURRENT_BINARY_DIR}/capnp-json.pc" DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+    list(APPEND CAPNP_PKG_CONFIG_FILES
+      pkgconfig/kj-async.pc
+      pkgconfig/kj-http.pc
+      pkgconfig/kj-test.pc
+      pkgconfig/capnp-rpc.pc
+      pkgconfig/capnp-json.pc
+    )
   endif()
 
+  foreach(pcfile ${CAPNP_PKG_CONFIG_FILES})
+    configure_file(${pcfile}.in "${CMAKE_CURRENT_BINARY_DIR}/${pcfile}" @ONLY)
+    install(FILES "${CMAKE_CURRENT_BINARY_DIR}/${pcfile}" DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+  endforeach()
+
   unset(STDLIB_FLAG)
   unset(PTHREAD_CFLAGS)
   unset(includedir)