+/// $CompilerFlags: execute("pcre-config --cflags" "PCRE_CXXFLAGS")
+/// $LinkerFlags: execute("pcre-config --libs" "PCRE_LDFLAGS" "-lpcre")
+
+/// $PackageInfo: require_system("centos") pcre-devel pkgconfig
+/// $PackageInfo: require_system("darwin") pcre pkg-config
+/// $PackageInfo: require_system("ubuntu") libpcre3-dev pkg-config
+