Build failure with GCC 15 (defaults to -std=gnu23)

[Marc Glisse]

On Tue, 4 Feb 2025, dkm at kataplop.net wrote:

> I did the same investigation to fix compiler explorer's nightly builds only to find that Sam already reported it (not clear why it failed for us only since 4 days ago, not mid-november).

Hmm, I supposedly *fixed* it 5 days ago, with 
8e7bb4ae7a18b1405ea7f9cbcda450b7d920a901.

-- 
Marc Glisse