pkg-config drops quatation marks from command-line parameters causing builds to fail
On MSYS2/MinGW64 environment you must use quatation marks in command-line parameters if path names have spaces (-L/c/path\ with\ spaces/lib/ => "-L/c/path with spaces/lib/").
Pkg-config silently drops those quatation marks even when they are in .pc files. This causes builds to fail on Windows. (You must hand edit Makefiles to have output of pkg-config but with quatation marks again.)
Attached is dinrhiw.pc file which quatation marks are dropped by pkg-config.dinrhiw.pc