On Thu, 12 Oct 2023 at 15:56, Sébastien Hinderer <Sebastien.Hinderer@xxxxxxxx> wrote: > So according to that, I expected that autoconf would call m4 with the -P > option and looked at my /usr/bin/autoconf script but it does not seem to > contain any occurrence of -P. But perhaps that appears in a sourced file > or so. You're right! Possibly it is done by 'lib/m4sugar/m4sugar.m4' in the source code. I'll leave it to someone who knows what they're talking about to reply! Pete https://git.savannah.gnu.org/gitweb/?p=autoconf.git;a=blob;f=lib/m4sugar/m4sugar.m4;h=810d2ea0aab3d727602294215f5ada0551965c23;hb=refs/heads/master
