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From: pda@sdf.org
Date: Tue, 10 Dec 2013 03:21:31 +0000
To: "Zsh Hackers' List" <zsh-workers@zsh.org>
Subject: Re: 5.0.2-test-3, arithmetic on pointer to void
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User-Agent: Mutt/1.5.22+4 (84acf5f0ce92) (2013-10-16)

It seems I'm the only one not exclusively using gcc, although I admit I
use it more often than not too.  Just noticed the following with HP's C
compiler (and for the record, it even has -Agcc flag that accepts the code).

Creating "init.c", line 287: error #3143: arithmetic on pointer to void or function type
      void *ptr = base + (optno < 0 ? -optno : optno);
                       ^
1 error detected in the compilation of "init.c".