Hi Alex,

On Ubuntu only -D_GNU_SOURCE helps, -D__USE_GNU is not enough.
It seems that the portability of the glibc API is gone as well…

Regards,
Andras

PS: I found the following on stackoverflow:

_GNU_SOURCE is the only one you should ever define yourself. __USE_GNU is 
defined internally through a mechanism in features.h (which is included by all 
other glibc headers) when _GNU_SOURCE is defined, and possibly under other 
conditions. Defining or undefining __USE_GNU yourself will badly break the 
glibc headers.

> On 2020. Nov 8., at 13:59, Alexander Burger <a...@software-lab.de> wrote:
> 
> On Sun, Nov 08, 2020 at 01:48:16PM +0100, Alexander Burger wrote:
>> Should we really do that? How portable are we then?
> 
> Anyway, I released it. Though I don't like it.
> 
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