__UNDEFINED__ SVf_UTF8 0
#ifndef newSVpvn_flags
-#if defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN)
+#if defined(PERL_USE_GCC_BRACE_GROUPS)
# define newSVpvn_flags(s, len, flags) ({ SV *_sv = newSVpvn(D_PPP_CONSTPV_ARG((s)), (len)); SvFLAGS(_sv) |= ((flags) & SVf_UTF8); ((flags) & SVs_TEMP) ? sv_2mortal(_sv) : _sv; })
#else
# define newSVpvn_flags(s, len, flags) ((PL_Sv = newSVpvn(D_PPP_CONSTPV_ARG((s)), (len))), SvFLAGS(PL_Sv) |= ((flags) & SVf_UTF8), (((flags) & SVs_TEMP) ? sv_2mortal(PL_Sv) : PL_Sv))