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Re: ffs problem in windows64

From: Christian Franke <Christian dot Franke at t-online dot de>
To: cygwin at cygwin dot com
Date: Tue, 23 Sep 2014 18:04:50 +0200
Subject: Re: ffs problem in windows64
Authentication-results: sourceware.org; auth=none
References: <CAHAq8pG0xMtSLJYs_u8OW4Z1Loovpyzzyo4oLBZQPqYsWFUU6w at mail dot gmail dot com> <54216D72 dot 2070307 at cs dot umass dot edu> <542175EF dot 4040703 at t-online dot de>

Christian Franke wrote:

This segfaults if gcc -fno-builtin option is used:
  ffs(0x80000000)

These work:
  ffs(0xc0000000)
  ffs(0x40000000)
Likely a subtle problem in table based ffs() implementation inwinsup/cygwin/syscalls.cc if only upper bit is set. The newlib versionof ffs() works.


https://cygwin.com/ml/cygwin-patches/2014-q3/msg00014.html


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References:
- ffs problem in windows64
  - From: Paulo CÃsar Pereira de Andrade
- Re: ffs problem in windows64
  - From: Eliot Moss
- Re: ffs problem in windows64
  - From: Christian Franke

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