__STDC_NO_THREADS__ and late model gcc/glibc
Thu Jun 20 11:28:00 GMT 2019
I find that gcc 4.9.0 onwards defines __STDC_NO_THREADS__ to be '1',
denying support for <threads.h>. Nevertheless, it does support
As of glibc 2.28, <threads.h> appears in the library. I guess that
means some version of gcc will no longer set __STDC_NO_THREADS__ ?
On gcc.godbolt.org, I find that __STDC_NO_THREADS__ is defined for all
versions up to and including the "trunk".
But on my machine, __STDC_NO_THREADS__ is no longer set by gcc v9.1.1,
and no longer set by gcc v7.2.0 (which I just built on my machine).
I note that gcc.godbolt.org has glibc 2.27, while my machine has glibc
2.28. I'm guessing that something, somewhere is taking that into account.
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 ?
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