esp8266/esp_mphal: Implement libc's errno.

Using __errno() function, and redirect it to use mp_stream_errno from
stream module. This is pre-requisite for integrating with 3rd-party libs,
like BerkeleyDB.

1 files changed, 5 insertions, 0 deletions

diff --git a/esp8266/esp_mphal.c b/esp8266/esp_mphal.c
index 3cc4610825..a2710af2e6 100644
--- a/esp8266/esp_mphal.c
+++ b/esp8266/esp_mphal.c
@@ -259,3 +259,8 @@ int ets_esf_free_bufs(int idx) {
     }
     return cnt;
 }
+
+extern int mp_stream_errno;
+int *__errno() {
+    return &mp_stream_errno;
+}