[riot-notifications] [RIOT-OS/RIOT] cpu/esp8266: fix stdio problems (#12133)

Gaëtan Harter notifications at github.com
Mon Sep 2 12:06:54 CEST 2019

> > ```
> > Test: comparing addresses of 'printf' and 'iprintf' symbols
> > [FAILED] '40101cf8' != '40101cf8' is False
> > Makefile:34: recipe for target 'test-newlib' failed
> > ```
> It is not clear for me why the test complains that addresses are equal. I'm a bit unsure if it would be the right way to blacklist ESP8266 for this test.
> Maybe @cladmi can say more about this test and whether it is really a problem if it fails.

The goal of this test was to detect if `newlib-nano` is indeed used when requested.

I had no real idea how to do the detection so used the fact described in the
`newlib-nano` that `iprintf` is mapped to `printf`


However, it appears that it is not a reliable condition :'(

Could it be that `esp` is using `newlib-nano` and not `newlib` ?

I will try debugging a bit.

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