Subject: bug#40205: closed (Re: 32bit or LTO movemail build fails on macOS)

From: [email-masked] (GNU bug Tracking System)
Date: Wed, 25 Mar 2020 20:44:01 +0000

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 [email-masked].

-- 
40205: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=40205
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Subject: Re: 32bit or LTO movemail build fails on macOS
From: Paul Eggert <[email-masked]>
To: YAMAMOTO Mitsuharu <[email-masked]>
Cc: Gnulib bugs <[email-masked]>, Zack Weinberg <[email-masked]>, [email-masked]
Date: Wed, 25 Mar 2020 13:43:01 -0700
List-Id: <debbugs-submit.debbugs.gnu.org>

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.

Subject: 28.0.50; 32bit or LTO movemail build fails on macOS
From: YAMAMOTO Mitsuharu <[email-masked]>
To: [email-masked]
Date: Tue, 24 Mar 2020 12:14:11 +0900
List-Id: <debbugs-submit.debbugs.gnu.org>

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
				[email-masked]