Date: Wed, 29 Dec 1999 16:48:59 -0800 From: Amancio Hasty <hasty@rah.star-gate.com> To: Mike Smith <msmith@freebsd.org> Cc: current@freebsd.org Subject: Re: gcc compiler problem part deux Message-ID: <199912300048.QAA45447@rah.star-gate.com> In-Reply-To: Your message of "Wed, 29 Dec 1999 16:31:34 PST." <199912300031.QAA03126@mass.cdrom.com>
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There are packages such as XFree86 which called directly the installed
cpp. Those packages which rely on the old behavior of /usr/libexec/cpp
for instance defining __FreeBSD__ are now broken .
>
> This was discussed weeks ago, and the new behaviour is correct. You
> should be using 'cc -E' instead.
>
> >
> > Forgot to post about this new feature of /usr/libexec/cpp :
> > 1. Test file
> > foo.c
> >
> > main() {
> > #ifdef __FreeBSD__
> > printf("hello\n");
> > #endif
> > }
> >
> > 1. old freebsd-current
> >
> > 2. gcc -v
> > Using builtin specs.
> > gcc version egcs-2.91.66 19990314 (egcs-1.1.2 release)
> >
> > /usr/libexec/cpp foo.c
> > # 1 "foo.c"
> > main() {
> >
> > printf("hello\n");
> >
> > }
> >
> > /usr/libexec/cpp has __FreeBSD_ defined --- and this is not
> > problem.
> >
> > 2. Now a very recent FreeBSD -current
> > gcc -v
> > Using builtin specs.
> > gcc version egcs-2.91.66 19990314 (egcs-1.1.2 release)
> >
> > /usr/libexec/cpp foo.c
> > # 1 "foo.c"
> >
> >
> > main() {
> >
> >
> >
> > }
> >
> > Voila! the "printf " disappeared.
> >
> > This behavior breaks the XFree86 3.9.17 build because the procedure
> > to build imake depends on /usr/libexec/cpp defining __FreeBSD__
> >
> > I patched locally the imake build so just for FreeBSD it adds a
> > -D__FreeBSD__
> >
> > I presumed that the latest /usr/libexec/cpp behavior is also going to
> > break other package. Again for me is not a problem because
> > after a few hours I managed to circumvent the new /usr/libexec/cpp
> > feature.
> >
--
Amancio Hasty
hasty@rah.star-gate.com
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