PKGCONF_PKG_PKGF_REDEFINE_PREFIX
want_client_flags |= PKGCONF_PKG_PKGF_REDEFINE_PREFIX;
want_client_flags &= ~PKGCONF_PKG_PKGF_REDEFINE_PREFIX;
if (pkg->owner->flags & PKGCONF_PKG_PKGF_REDEFINE_PREFIX && pkg->orig_prefix
else if (strcmp(keyword, pkg->owner->prefix_varname) || !(pkg->owner->flags & PKGCONF_PKG_PKGF_REDEFINE_PREFIX))