errno: Avoid including strings in SPL

At present the header file defines this function in SPL but the file may
not actually be built. This causes a build error if the option is enabled.

Fix the condition in the header file.

Signed-off-by: Simon Glass <sjg@chromium.org>

diff --git a/include/errno.h b/include/errno.h
index 652ad673068a6b6d1b8defb5334b183f2e2e2395..5a8816d0a1d847d07f9b3a0d438c9d269c9207dc 100644 (file)
--- a/include/errno.h
+++ b/include/errno.h
@@ -25,7 +25,7 @@ extern int errno __errno_asm_label;
  * Return:     string describing the error. If CONFIG_ERRNO_STR is not
  *             defined an empty string is returned.
  */
-#ifdef CONFIG_ERRNO_STR
+#if CONFIG_IS_ENABLED(ERRNO_STR)
 const char *errno_str(int errno);
 #else
 static const char error_message[] = "";