fc-cat --version (return code: 0)
fontconfig version 2.11.94
fc-cat --help (return code: 0)
usage: fc-cat [-rv] [--recurse] [--verbose] [*-le64.cache-6|directory]...
fc-cat [-Vh] [--version] [--help]
Reads font information cache from:
1) specified fontconfig cache file
2) related to a particular font directory
-r, --recurse recurse into subdirectories
-v, --verbose be verbose
-V, --version display font config version and exit
-h, --help display this help and exit