PKG_SILENCE_ERRORS
{ "silence-errors", no_argument, &want_flags, PKG_SILENCE_ERRORS, },
want_flags |= (PKG_SILENCE_ERRORS);
if ((want_flags & PKG_SILENCE_ERRORS) == PKG_SILENCE_ERRORS && !getenv("PKG_CONFIG_DEBUG_SPEW"))
want_flags |= (PKG_SILENCE_ERRORS);
want_flags &= ~(PKG_SILENCE_ERRORS);
if ((want_flags & PKG_SILENCE_ERRORS) == PKG_SILENCE_ERRORS) {