Re: Native compilation on Windows, was Re: Bootstrap Compilation Speed

[Eli Zaretskii]

> From: Phillip Lord <phillip.lord@russet.org.uk>
> Cc: "H. Dieter Wilhelm" <dieter@duenenhof-wilhelm.de>,  corwin@bru.st,
>   emacs-devel@gnu.org
> Date: Mon, 17 Jan 2022 09:39:34 +0000
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> I could build Gnu-Emacs-28.0.91 when I used the archived sources
> >> 
> >>   $ ./configure --with-native-compilation
> >> 
> >> The difference to the build-zips.sh seems to me some more options from
> >> the script (and that is build from the git tree):
> >> 
> >>         echo [build] Configuring Emacs
> >>         $REPO_DIR/$BRANCH/configure \
> >>             --without-dbus \
> >>             --without-compress-install \
> >>             --with-native-compilation \
> >>             $CACHE \
> >>             CFLAGS="$CFLAGS"
> >> 
> >> Could it be that these additional options are spoiling the build?
> >> (CACHE=-C , I think.)
> >
> > I'd drop the CACHE part, so that the configure script starts from a
> > clean state.
> 
> I wouldn't!
> 
> CACHE=-C is used only on a snapshot build. These were always built
> incrementally from the previous version because I judged that the risk
> of a broken build was small compared to the significant time and cost
> saving that the incremental build provided.

AFAIU, Dieter said he did more than one build in the same tree for
several different configurations, so I suggested to eliminate the
cache as a possible factor for the problems he saw in the second
build.  Apologies if I misunderstood.