GNU bug report logs - #40205
28.0.50; 32bit or LTO movemail build fails on macOS

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Package: emacs;

Reported by: YAMAMOTO Mitsuharu <mituharu <at> math.s.chiba-u.ac.jp>

Date: Tue, 24 Mar 2020 03:15:01 UTC

Severity: normal

Found in version 28.0.50

Done: Paul Eggert <eggert <at> cs.ucla.edu>

Bug is archived. No further changes may be made.

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: YAMAMOTO Mitsuharu <mituharu <at> math.s.chiba-u.ac.jp>
Subject: bug#40205: closed (Re: 32bit or LTO movemail build fails on macOS)
Date: Wed, 25 Mar 2020 20:44:01 +0000

[Message part 1 (text/plain, inline)]
Your bug report

#40205: 28.0.50; 32bit or LTO movemail build fails on macOS

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 40205 <at> debbugs.gnu.org.

-- 
40205: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=40205
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]
From: Paul Eggert <eggert <at> cs.ucla.edu>
To: YAMAMOTO Mitsuharu <mituharu <at> math.s.chiba-u.ac.jp>
Cc: Gnulib bugs <bug-gnulib <at> gnu.org>, Zack Weinberg <zackw <at> panix.com>,
 40205-done <at> debbugs.gnu.org
Subject: Re: 32bit or LTO movemail build fails on macOS
Date: Wed, 25 Mar 2020 13:43:01 -0700

On 3/24/20 9:07 PM, YAMAMOTO Mitsuharu wrote:

> Yes, this works for both -arch i386 and -flto cases.

Thanks for checking. I installed the patch into Gnulib and propagated the fix 
into Emacs master, and am marking this Emacs bug as done.


[Message part 3 (message/rfc822, inline)]
From: YAMAMOTO Mitsuharu <mituharu <at> math.s.chiba-u.ac.jp>
To: bug-gnu-emacs <at> gnu.org
Subject: 28.0.50; 32bit or LTO movemail build fails on macOS
Date: Tue, 24 Mar 2020 12:14:11 +0900

On macOS, movemail cannot be built with CC='cc -arch i386':

    CCLD     movemail
  Undefined symbols for architecture i386:
    "_rpl_getopt$UNIX2003", referenced from:
	_main in movemail-1f1ea0.o
  ld: symbol(s) not found for architecture i386
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  make[1]: *** [movemail] Error 1
  make: *** [lib-src] Error 2

This is due to the following part in the system getopt.h:

  #ifndef _GETOPT
  #define	_GETOPT
  int	 getopt(int, char * const [], const char *) __DARWIN_ALIAS(getopt);

  extern char *optarg;			/* getopt(3) external variables */
  extern int optind, opterr, optopt;
  #endif

which is expanded to:

  int rpl_getopt(int, char * const [], const char *) __asm("_" "rpl_getopt" "$UNIX2003");

  extern char *rpl_optarg;
  extern int rpl_optind, rpl_opterr, rpl_optopt;

I think the Gnulib getopt does not expect the __asm line above.

64-bit LTO build with CC='cc -flto' fails, too.

    CCLD     movemail
  ld: reference to symbol (which has not been assigned an address) _rpl_getopt in '_main' from /var/folders/69/m7h39yv92g70qy7p3xdlghdm0000gn/T/cc-907a5d.o for architecture x86_64
  clang: error: linker command failed with exit code 1 (use -v to see invocation)
  make[1]: *** [movemail] Error 1
  make: *** [lib-src] Error 2

				     YAMAMOTO Mitsuharu
				mituharu <at> math.s.chiba-u.ac.jp
This bug report was last modified 5 years and 59 days ago.

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