GNU bug report logs - #11669
24.1; Build failure on amd64 with x32 ABI

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Ulrich Mueller <ulm <at> gentoo.org>
Subject: bug#11669: closed (Re: bug#11669: 24.1; Build failure on amd64
 with x32 ABI)
Date: Thu, 21 Jun 2012 19:48:01 +0000

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Your bug report

#11669: 24.1; Build failure on amd64 with x32 ABI

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 11669 <at> debbugs.gnu.org.

-- 
11669: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=11669
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Glenn Morris <rgm <at> gnu.org>
To: 11669-done <at> debbugs.gnu.org
Subject: Re: bug#11669: 24.1; Build failure on amd64 with x32 ABI
Date: Thu, 21 Jun 2012 15:44:19 -0400

Version: 24.2

OK, I applied the configure version to the emacs-24 branch marked "do
not merge to trunk". It should be academic anyway since at the moment it
does not look like 24.2 will come from there (effectively).

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From: Ulrich Mueller <ulm <at> gentoo.org>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.1; Build failure on amd64 with x32 ABI
Date: Sun, 10 Jun 2012 21:42:20 +0200

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Forwarding downstream bug: <https://bugs.gentoo.org/show_bug.cgi?id=420257>

Emacs 24.1 fails to build on an amd64 system with x32 ABI [1][2].
During compilation, about 20000 warnings like:

   warning: left shift count >= width of type [enabled by default]
   warning: right shift count >= width of type [enabled by default]

occur, and finally the build process aborts with a segmentation fault:

   if test "no" = "yes"; then \
     ln -f temacs bootstrap-emacs; \
   else \
     `/bin/pwd`/temacs --batch --load loadup bootstrap || exit 1; \
     test "X" = X ||  -zex emacs; \
     mv -f emacs bootstrap-emacs; \
   fi
   /bin/sh: line 6: 27446 Segmentation fault      `/bin/pwd`/temacs --batch --load loadup bootstrap
   make[1]: *** [bootstrap-emacs] Error 1
   make[1]: Leaving directory `/var/tmp/portage/app-editors/emacs-24.1/work/emacs-24.1/src'
   make: *** [src] Error 2

See [3] for the full build log.

I've attached a one line patch that fixes the problem for me.
AFAICS, Emacs from BZR is not affected.

(Sorry about the bad timing, but x32 support in Gentoo is just
available since a few days.)

[1] https://lwn.net/Articles/500482/
[2] https://sites.google.com/site/x32abi/
[3] http://dev.gentoo.org/~ulm/emacs-24.1-build.log

[03_all_x32.patch (text/plain, inline)]

--- emacs-24.1-orig/configure.in
+++ emacs-24.1/configure.in
@@ -749,6 +749,7 @@
     machine=intel386
     machfile="m/${machine}.h"
   fi
+  AC_CHECK_DECL([__ILP32__], [machfile="m/intel386.h"])
 fi
 
 AC_PATH_PROG(INSTALL_INFO, install-info)

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