How to write a file PkgConfig.pc file that supports both static and shared linking

I am writing a little library as a self challenge. I plan to target Linux based systems. I want to add a libname.pc file so as to add support for PkgConfig. Here, is my current file:

prefix=/usr/local
exec_prefix=${prefix}
cphoton_directory=cphoton-0.0
include_directory=${prefix}/include/${cphoton_directory}
library_directory=${exec_prefix}/lib

Name: cphoton-0.0
Description: CPhoton is a basic utility library.
Version: 0.0.0
URL: https://gitlab.com/invitron/cphoton 
Cflags: -I${include_directory}
Libs: -L${library_directory} -lcphoton-0.0
Libs.private:

I wanted to know if this is compatible for both static and dynamic libs. I tried to use pkg-config with --static flag but, it seems to give precedence to .so lib. I also tested it with cmake. It links statically only if the dynamic lib is not available. Is it possible or will I have to provide a separate .pc file for static version? Already visited: - https://stackoverflow.com/questions/27586503/how-to-use-pkg-config-to-link-a-library-statically - https://people.freedesktop.org/~dbn/pkg-config-guide.html