diff --git a/toolchain/helpers.mk b/toolchain/helpers.mk
index 1cd7494fdb..24c482923a 100644
--- a/toolchain/helpers.mk
+++ b/toolchain/helpers.mk
@@ -422,12 +422,16 @@ check_cross_compiler_exists = \
 #   the host tuple.
 # - Exclude distro-class toolchains which are not relocatable.
 # - Exclude broken toolchains which return "libc.a" with -print-file-name.
+# - Exclude toolchains used with wrong toolchain cflags or broken toolchains
+#   which return "libc.a" with -print-file-name and toolchain cflags.
 # - Exclude toolchains which doesn't support --sysroot option.
 #
 # $1: cross-gcc path
+# $1: toolchain cflags
 #
 check_unusable_toolchain = \
 	__CROSS_CC=$(strip $1) ; \
+	__TOOLCHAIN_CFLAGS=$(strip $2) ; \
 	vendor=`$${__CROSS_CC} -dumpmachine | cut -f2 -d'-'` ; \
 	if test "$${vendor}" = "angstrom" ; then \
 		echo "Angstrom toolchains are not pure toolchains: they contain" ; \
@@ -449,6 +453,13 @@ check_unusable_toolchain = \
 		echo "Unable to detect the toolchain sysroot, Buildroot cannot use this toolchain." ; \
 		exit 1 ; \
 	fi ; \
+	libc_a_archsysroot_path=`$${__CROSS_CC} $${__TOOLCHAIN_CFLAGS} -print-file-name=libc.a` ; \
+	if test "$${libc_a_archsysroot_path}" = "libc.a" ; then \
+		echo "Unable to detect the toolchain architecture sysroot." ; \
+		echo "Please check the Target Architecture Variant selected, the toolchains may not support it." ; \
+		echo "Buildroot cannot use this toolchain." ; \
+		exit 1 ; \
+	fi; \
 	sysroot_dir="$(call toolchain_find_sysroot,$${__CROSS_CC})" ; \
 	if test -z "$${sysroot_dir}" ; then \
 		echo "External toolchain doesn't support --sysroot. Cannot use." ; \
diff --git a/toolchain/toolchain-external/pkg-toolchain-external.mk b/toolchain/toolchain-external/pkg-toolchain-external.mk
index 299b6008aa..c37f3500d9 100644
--- a/toolchain/toolchain-external/pkg-toolchain-external.mk
+++ b/toolchain/toolchain-external/pkg-toolchain-external.mk
@@ -563,7 +563,7 @@ endif
 # kernel headers version, type of C library and all C library features.
 define $(2)_CONFIGURE_CMDS
 	$$(Q)$$(call check_cross_compiler_exists,$$(TOOLCHAIN_EXTERNAL_CC))
-	$$(Q)$$(call check_unusable_toolchain,$$(TOOLCHAIN_EXTERNAL_CC))
+	$$(Q)$$(call check_unusable_toolchain,$$(TOOLCHAIN_EXTERNAL_CC),"$$(TOOLCHAIN_EXTERNAL_CFLAGS)")
 	$$(Q)SYSROOT_DIR="$$(call toolchain_find_sysroot,$$(TOOLCHAIN_EXTERNAL_CC))" ; \
 	$$(call check_kernel_headers_version,\
 		$$(BUILD_DIR),\