On 07/26/2018 09:38 PM, Andreas Schwab wrote: >>> build-many-glibcs.py catches it though when building gcc >>> (i've just run into this). >> >> Only if GCC uses the header, right? So it's only limited coverage because >> GCC aims to be portable and won't use obscure stuff. > > <sys/stat.h> isn't obscure. We had another issue with <threads.h>. Florian