+/// $CompilerFlags: find_compiler_flags("tre")
+/// $LinkerFlags: find_linker_flags("tre" "-ltre")
+
+/// $PackageInfo: require_system("arch") pkgconf tre
+/// $PackageInfo: require_system("darwin") pkg-config tre
+/// $PackageInfo: require_system("debian") libtre-dev pkg-config
+/// $PackageInfo: require_system("ubuntu") libtre-dev pkg-config