This is a small application (for Windows) which can take pkg-config calls such as from CMake based build toolchain and print the requested arguments as well as returned result.
The application would typically sit first on the search path, and it will automatically find next one (such as for example pkgconfiglite), and the application will forward the calls to such second real pkg-config.
The application is also capable to convert extra PKG_CONFIG_PATH command line argument, such as set by PKG_CONFIG_ARGN on CMake side, and convert it into environment variable before forwarding the call. Although, this was no longer necessary for mt specific problem once I figured out the original cross-compilation issue.