gcc: disable threads when built for uclibc/no-threads [WIP]

base/gcc/gcc.conf

@@ -146,12 +146,17 @@ if atstage cross; then
 	var_append GCC_WRAPPER_APPEND ' ' "-Wl,-rpath,${root}/lib"
 fi
 
+if [ "$SDECFG_LIBC" = 'uclibc' -a "$SDECFG_PKG_UCLIBC_THREADSUPPORT" = 'none' ]; then
+	var_append confopt " " "--disable-threads"
+else
+	var_append confopt " " "--enable-threads=posix"
+fi
+
 if ! atstage native; then
 	var_append confopt " " "--disable-libmudflap"
 else
 	var_append confopt " " "--with-gnu-as"
 	var_append confopt " " "--with-gnu-ld"
-	var_append confopt " " "--enable-threads=posix"
 
 	if [ "$SDECFG_PKG_GCC_JAVA" != 1 ] ; then
 		var_append confopt " " "--disable-libgcj"