diff --git a/sdk_container/src/third_party/portage-stable/eclass/flag-o-matic.eclass b/sdk_container/src/third_party/portage-stable/eclass/flag-o-matic.eclass
index d377568327..500ceb5941 100644
--- a/sdk_container/src/third_party/portage-stable/eclass/flag-o-matic.eclass
+++ b/sdk_container/src/third_party/portage-stable/eclass/flag-o-matic.eclass
@@ -20,7 +20,7 @@ _FLAG_O_MATIC_ECLASS=1
 
 inherit toolchain-funcs
 
-[[ ${EAPI} == 6 ]] && inherit eutils
+[[ ${EAPI} == 6 ]] && inherit eqawarn
 
 # @FUNCTION: all-flag-vars
 # @DESCRIPTION:
@@ -81,6 +81,7 @@ _setup-allowed-flags() {
 		-gstabs -gstabs+
 		-gz
 		-glldb
+		'-fdebug-default-version=*'
 
 		# Cosmetic/output related, see e.g. bug #830534
 		-fno-diagnostics-color '-fmessage-length=*'
@@ -115,6 +116,10 @@ _setup-allowed-flags() {
 		-mlittle-endian -mbig-endian -EL -EB -fPIC -mlive-g0 '-mcmodel=*'
 		-mstack-bias -mno-stack-bias -msecure-plt '-m*-toc' '-mfloat-abi=*'
 
+		# This is default on for a bunch of arches except amd64 in GCC
+		# already, and amd64 itself is planned too.
+		'-mtls-dialect=*'
+
 		# MIPS errata
 		-mfix-24k -mno-fix-24k -mfix-r4000 -mno-fix-r4000
 		-mfix-r4400 -mno-fix-r4400 -mfix-r5900 -mno-fix-r5900