Stefan Fiedler:

package/base/tar/tar.conf

@@ -29,3 +29,5 @@ var_append GCC_WRAPPER_INSERT " " "-std=gnu99"
 # Alternatively, use __restrict instead:
 # hook_add preconf 5 "echo ac_cv_c_restrict=__restrict > config.cache"
 # var_append extraconfopt " " "--cache-file=config.cache"
+hook_add preconf 3 'echo "gl_cv_func_wcwidth_works=yes" >> config.cache'
+