From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-494485-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 116291 invoked by alias); 10 Aug 2015 10:10:10 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Received: (qmail 116236 invoked by uid 48); 10 Aug 2015 10:10:07 -0000
From: "vapier at gentoo dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug bootstrap/57125] Build not SMP safe; fails to build bconfig.h
Date: Mon, 10 Aug 2015 10:10:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: bootstrap
X-Bugzilla-Version: unknown
X-Bugzilla-Keywords:
X-Bugzilla-Severity: normal
X-Bugzilla-Who: vapier at gentoo dot org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution:
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields:
Message-ID: <bug-57125-4-JLJxx7ANsG@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-57125-4@http.gcc.gnu.org/bugzilla/>
References: <bug-57125-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2015-08/txt/msg00627.txt.bz2

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57125

--- Comment #9 from Mike Frysinger <vapier at gentoo dot org> ---
after having the backport deployed in Gentoo, we found an edge case with the
fix in trunk ...

we still have this rule in gcc/Makefile.in:
# Generated source files for gengtype.  Prepend inclusion of
# bconfig.h because AIX requires _LARGE_FILES to be defined before
# any system header is included.
gengtype-lex.c : gengtype-lex.l
    -$(FLEX) $(FLEXFLAGS) -o$@ $< && { \
      echo '#include "bconfig.h"' > $@.tmp; \
      cat $@ >> $@.tmp; \
      mv $@.tmp $@; \
    }

so even though gengtype-lex.l was adapted to not include bconfig.h when
HOST_GENERATOR_FILE is defined, and the bconfig.h dep on that file was dropped,
the source still tries to always include it for both host & build modes.

i don't really understand the comment ... it seems to me that the lex file will
include the right config.h header files first already, so we should drop the
explicit insertion of bconfig.h here.