GNU bug report logs - #13448
Cannot build Emacs 24.2.92

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Xue Fuqiao <xfq.free <at> gmail.com>
Subject: bug#13448: closed (Re: bug#13448: Cannot build Emacs 24.2.92)
Date: Tue, 15 Jan 2013 21:31:02 +0000

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Your bug report

#13448: Cannot build Emacs 24.2.92

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 13448 <at> debbugs.gnu.org.

-- 
13448: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=13448
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Xue Fuqiao <xfq.free <at> gmail.com>
Cc: Glenn Morris <rgm <at> gnu.org>, Andreas Schwab <schwab <at> linux-m68k.org>,
	13448-done <at> debbugs.gnu.org
Subject: Re: bug#13448: Cannot build Emacs 24.2.92
Date: Tue, 15 Jan 2013 13:30:21 -0800

Enabling link time optimization is a common enough need and
there's a simple fix that I think makes Emacs a bit clearer,
so I pushed the following patch to the trunk as bzr 111533
and I'm marking this as done.

The original problem feels like it might be a GCC problem --
GCC shouldn't be dumber (and presumably generate worse code)
merely because link-time optimization is enabled.  Do you
have the time to file a GCC bug report?

=== modified file 'lib-src/ChangeLog'
--- lib-src/ChangeLog	2013-01-02 16:13:04 +0000
+++ lib-src/ChangeLog	2013-01-15 21:24:53 +0000
@@ -1,3 +1,9 @@
+2013-01-15  Paul Eggert  <eggert <at> cs.ucla.edu>
+
+	* make-docfile.c (write_globals): Make it a bit clearer (Bug#13448).
+	This pacifies GCC 4.7.2 when Emacs is configured with
+	--enable-link-time-optimization and --enable-gcc-warnings.
+
 2013-01-01  Juanma Barranquero  <lekktu <at> gmail.com>
 
 	* makefile.w32-in (lisp1): Add macroexp.elc (bug#13320).

=== modified file 'lib-src/make-docfile.c'
--- lib-src/make-docfile.c	2013-01-01 09:11:05 +0000
+++ lib-src/make-docfile.c	2013-01-15 21:23:34 +0000
@@ -624,7 +624,7 @@
   qsort (globals, num_globals, sizeof (struct global), compare_globals);
   for (i = 0; i < num_globals; ++i)
     {
-      char const *type;
+      char const *type = 0;
 
       switch (globals[i].type)
 	{
@@ -649,7 +649,7 @@
 	  fatal ("not a recognized DEFVAR_", 0);
 	}
 
-      if (globals[i].type != FUNCTION)
+      if (type)
 	{
 	  fprintf (outfile, "  %s f_%s;\n", type, globals[i].name);
 	  fprintf (outfile, "#define %s globals.f_%s\n",

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From: Xue Fuqiao <xfq.free <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: Cannot build Emacs 24.2.92
Date: Tue, 15 Jan 2013 17:59:31 +0800

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I configured Emacs pretest 24.2.92 using:

    ./configure --with-wide-int --enable-link-time-optimization --enable-gcc-warnings

Then I:

    make

After that:

See attachment.

I'm using Ubuntu 12.10 to build Emacs 24.2.92.
-- 
Best regards, Xue Fuqiao.
http://www.emacswiki.org/emacs/XueFuqiao

[make.txt (text/plain, attachment)]

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