https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91694
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to Rishi Khan from comment #4)
> (In reply to Jakub Jelinek from comment #3)
> > Can you start by saying what OS this is on? The lib*/configure* in gcc tree
> > can't use linking in all cases due to newlib startup setups, but it is true
> > that in libgomp's configure AC_LINK_IFELSE is used already for most targets
> > (but not all).
>
> This is on my custom OS that doesn't have gethostname ('hcos', which is in
> the config.sub upstream). I am actually using newlib.
>
> It seems like libgomp's configure.ac is already using AC_LINK_IFELSE for all
> OS's around line 241 to 'Check for pthread_{,attr_}[sg]etaffinity_np.'.
True, but that is something most of the targets don't have, it is glibc
specific mostly, so doesn't matter if it fails.
> In my newlib startup setup, I only build libgomp in stage2.
> See here for Makefile:
> https://github.com/riscv/riscv-gnu-toolchain/blob/master/Makefile.in
> On line 541 I have --enable-threads and on line 551 I have --enable-libgomp
Your OS isn't among those where libgomp is supported. Do you say you have
POSIX threads but not gethostname?
