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From: Jarek Czekalski <jarekczek@poczta.onet.pl>
To: emacs-devel@gnu.org
Subject: Re: after r114507 cannot build on msys - dup2 problem
Date: Thu, 31 Oct 2013 20:22:14 +0100	[thread overview]
Message-ID: <5272ADE6.1050905@poczta.onet.pl> (raw)
In-Reply-To: <5272A824.3000300@poczta.onet.pl>

If there are ever any problems with dup2 here is my analyze:

Emacs code never uses the feature of dup2, that it returns the 
descriptor. In most cases the return value is ignored. In emacs.c the 
return value is tested for < 0, which is compatible with both msvcrt and 
posix.

So the test in m4/dup2.m4 whether dup2(1, 1) returns 1 is not needed and 
could be skipped.

Other tests for dup2 are passed on mingw.

Jarek




      reply	other threads:[~2013-10-31 19:22 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-10-31 17:44 after r114507 cannot build on msys Jarek Czekalski
2013-10-31 18:16 ` after r114507 cannot build on msys - dup2 problem Jarek Czekalski
2013-10-31 18:17 ` after r114507 cannot build on msys Eli Zaretskii
2013-10-31 18:57   ` after r114507 cannot build on msys - dup2 problem Jarek Czekalski
2013-10-31 19:22     ` Jarek Czekalski [this message]

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