Re: macosx linking fails: _freea referenced from: _rpl_realpath

[Bruno Haible <bruno@clisp.org>]

Sam Steingold wrote:
> I get this error when linking Emacs:
> 
> --8<---------------cut here---------------start------------->8---
>   CCLD     temacs
> Undefined symbols for architecture x86_64:
>   "_freea", referenced from:
>       _rpl_realpath in libgnu.a(canonicalize-lgpl.o)
> ld: symbol(s) not found for architecture x86_64
> clang: error: linker command failed with exit code 1 (use -v to see invocation)
> make[1]: *** [temacs] Error 1
> --8<---------------cut here---------------end--------------->8---
> 
> I also reported this as https://debbugs.gnu.org/cgi/bugreport.cgi?bug=36356
> (https://lists.gnu.org/archive/html/bug-gnu-emacs/2019-06/msg01229.html)

1) After your latest "git pull" from emacs, have you done a "make distclean"
   followed by a reconfiguration?

If you don't remember: Does the issue persist after a "make distclean"
followed by a reconfiguration?

2) Which symbols does
  nm lib/malloca.o
show? If, as I would expect, it lists '_mmalloca' but not '_freea', it means
that the macro HAVE_ALLOCA was defined in the compilation unit
canonicalize-lgpl.c but not defined in the compilation unit malloca.c.
Can you investigate why this is so? (Where is HAVE_ALLOCA defined? In config.h,
I would guess. It is undefined somewhere? I would guess no. What are the
preprocessor symbols that are defined [use "$CC -E -dM"] in the
compilation unit canonicalize-lgpl.c, versus the compilation unit malloca.c?

Bruno