On 2024-04-27 15:39, dmitrii.pasech...@cs.ox.ac.uk wrote:
It's for nauty, a well-known program to deal with graph isomorphisms
etc. I've made a Gentoo patch herehttps://bugs.gentoo.org/921138
and I wanted to upstream it.
Oh my, that is indeed in an undocumented/hacky part of autoconf, one
that I just changed in the master development sources a few days ago; see:
https://git.savannah.gnu.org/cgit/autoconf.git/commit/?id=b71143738516017f0e0d347a4025301c06c40254
From your patch, it appears that nauty isn't using config.h and instead
has its own file nauty-h.in that it maintains itself. Perhaps you could
lessen this sort of problem by having it use config.h instead, at least
for some things. Failing that, you could instead assume that
ac_cv_sys_largefile_opts's value is a compiler option if and only if it
begins with "-"; that's easy to say in a shell case statement and though
still hacky would be a bit less brittle than what you've got.
