From e08ca78f40bb1948acffa60c0315083acfb02227 Mon Sep 17 00:00:00 2001
From: Damien George
Date: Mon, 20 Apr 2020 23:48:34 +1000
Subject: py/stream: Remove mp_stream_errno and use system errno instead.

This change is made for two reasons:

1. A 3rd-party library (eg berkeley-db-1.xx, axtls) may use the system
   provided errno for certain errors, and yet MicroPython stream objects
   that it calls will be using the internal mp_stream_errno.  So if the
   library returns an error it is not known whether the corresponding errno
   code is stored in the system errno or mp_stream_errno.  Using the system
   errno in all cases (eg in the mp_stream_posix_XXX wrappers) fixes this
   ambiguity.

2. For systems that have threading the system-provided errno should always
   be used because the errno value is thread-local.

For systems that do not have an errno, the new lib/embed/__errno.c file is
provided.
---
 extmod/extmod.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'extmod')

diff --git a/extmod/extmod.mk b/extmod/extmod.mk
index 69d8cfad3..e312acba8 100644
--- a/extmod/extmod.mk
+++ b/extmod/extmod.mk
@@ -47,7 +47,7 @@ CFLAGS_MOD += -DMICROPY_PY_USSL=1
 ifeq ($(MICROPY_SSL_AXTLS),1)
 CFLAGS_MOD += -DMICROPY_SSL_AXTLS=1 -I$(TOP)/lib/axtls/ssl -I$(TOP)/lib/axtls/crypto -I$(TOP)/extmod/axtls-include
 AXTLS_DIR = lib/axtls
-$(BUILD)/$(AXTLS_DIR)/%.o: CFLAGS += -Wno-all -Wno-unused-parameter -Wno-uninitialized -Wno-sign-compare -Wno-old-style-definition $(AXTLS_DEFS_EXTRA)
+$(BUILD)/$(AXTLS_DIR)/%.o: CFLAGS += -Wno-all -Wno-unused-parameter -Wno-uninitialized -Wno-sign-compare -Wno-old-style-definition -Dmp_stream_errno=errno $(AXTLS_DEFS_EXTRA)
 SRC_MOD += $(addprefix $(AXTLS_DIR)/,\
 	ssl/asn1.c \
 	ssl/loader.c \
-- 
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