pkgconf_client_set_flags
pkgconf_client_set_flags(&pkg_client, want_client_flags);
pkgconf_client_set_flags(&pkg_client, want_client_flags | PKGCONF_PKG_PKGF_SKIP_ERRORS);
pkgconf_client_set_flags(&pkg_client, want_client_flags | PKGCONF_PKG_PKGF_SKIP_ROOT_VIRTUAL);
pkgconf_client_set_flags(&pkg_client, want_client_flags | PKGCONF_PKG_PKGF_SKIP_ROOT_VIRTUAL);
pkgconf_client_set_flags(&pkg_client, pkg_client.flags & ~PKGCONF_PKG_PKGF_SEARCH_PRIVATE);
PKGCONF_API void pkgconf_client_set_flags(pkgconf_client_t *client, unsigned int flags);