On Fri, 21 Jun 2019 at 10:39, Chris Hall wrote: > > On 20/06/2019 13:17, Jonathan Wakely wrote: > > On Thu, 20 Jun 2019 at 12:28, Chris Hall wrote: > ... > >> I have looked everywhere I can think of to find where > >> __STDC_NO_THREADS__ is configured... but to no avail :-( > >> > >> Does anyone know what I should expect, or where I should look to find > >> out, please ? > > > Glibc provides it in the /usr/include/stdc-predef.h file which is > > implicitly pre-included by GCC. > > Ah ha ! Thank you. > > I guess that accounts for the "predefined" _STDC_PREDEF_H. > > AFAICS, the decision to "preinclude" <stdc-predef.h> is made when gcc is > built, depending on the target. Right, see gcc/config/glibc-c.c > Deep Magic of the First Magnitude. :-)
