gcc: improved to explicitely build --with-linker-hash-style=gnu when glibc is the primary libc

base/gcc/gcc.conf

@@ -130,6 +130,9 @@ if [ "$SDECFG_LIBC" = 'glibc' ]; then
 	# use the gnu_unique_object relocation for C++ template static data
 	# members and inline function local statics
 	var_append confopt ' ' "--enable-gnu-unique-object"
+
+	# pass --hash-style=gnu option to the linker for all final links
+	var_append confopt ' ' "--with-linker-hash-style=gnu"
 fi