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Date: Fri, 27 Jul 2001 11:58:17 -0400
To: srk AT sanger DOT ac DOT uk, cygwin AT cygwin DOT com
From: "Larry Hall (RFK Partners, Inc)" <lhall AT rfk DOT com>
Subject: Re: Strange bug in C pre-processor - cygwin 1.0
In-Reply-To: <200107271536.f6RFarQ28343@mailsrv1.sanger.ac.uk>
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At 12:56 PM 7/27/2001, srk AT sanger DOT ac DOT uk wrote:
>I've just encountered a very strange bug in the C pre-processor in cygwin 1.0 (the
>cdrom version.)
>
>The bug manifests itself as the pre-processor just ignoring a subset of the
>#include statements in the source file. Exactly which #includes will be ignored
>is variable - two successive compiles of the same source file will cause different
>include files to be ignored. Obviously, dropping random include files leads to
>very odd diagnostics from the compiler but it's easy to see what is happening using the
>-E flag to just run the precprocessor. That is enough to show the bug.
>
>What seems to provoke this bug is a very long (>100 lines) single C comment at the
>start of the file. The presence of that is what distinguished the broken source file from
>all the others which compile OK. When I split the comment into three, the problem
>went away.
>
>Environment:
>
>cygwin 1.0
>NT 4.0 SP3
>
>I'm happy to send someone enough stuff to re-produce this if needed. (The code
>I'm trying to compile is all GPL).


Can you reproduce it with the current net release?


Larry Hall                              lhall AT rfk DOT com
RFK Partners, Inc.                      http://www.rfk.com
118 Washington Street                   (508) 893-9779 - RFK Office
Holliston, MA 01746                     (508) 893-9889 - FAX


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