Re: bug#32452: 26.1; gnutls_try_handshake maxes out cpu retrying when server is a bit busy

[Paul Eggert]

On 2/24/22 18:27, Lars Ingebrigtsen wrote:

> But autogen.sh fails:
>
> Running 'autoreconf -fi -I m4' ...
> configure.ac:6060: warning: gl_FUNC_SELECT is m4_require'd but not m4_defun'd

This is because Gnulib's 'nanosleep' module depended on the 'select' 
module, but Emacs's admin/merge-gnulib avoids the 'select' module 
(because Emacs relies on pselect instead and has its own MS-DOS pselect 
substitute).

Gnulib's nanosleep appears to use select only for old Unixish platforms 
that were relevant in 2000 but aren't practical porting targets any 
more. So I installed into Gnulib the attached patch to simplify Gnulib 
nanosleep by having it fall back on pselect rather than select, and to 
not bother with signal handling. This should cause your addition of 
nanosleep to admin/merge-gnulib to add only the files lib/nanosleep.c 
and m4/nanosleep.m4 (not the other, signal-related files you mentioned; 
they shouldn't be needed with Emacs).

You might also want to adopt my recent little merge-gnulib changes.

I notice that Emacs's GNUstep code calls 'select'. For completeness this 
should be 'pselect' instead, so that Emacs never calls 'select'.

0001-nanosleep-simplify-by-using-pselect.patch
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