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Re: [Bug pch/14400] Cannot compile qt-x11-free-3.3.0

From: Mike Stump <mrs at apple dot com>
To: Ian Lance Taylor <ian at wasabisystems dot com>
Cc: Geoffrey Keating <geoffk at apple dot com>, gcc at gcc dot gnu dot org, gcc-bugzilla at gcc dot gnu dot org
Date: Mon, 5 Apr 2004 13:53:36 -0700
Subject: Re: [Bug pch/14400] Cannot compile qt-x11-free-3.3.0

On Saturday, April 3, 2004, at 07:38 PM, Ian Lance Taylor wrote:

Any thoughts on how difficult it would be to, when a PCH can not be
loaded at the correct address, skip the PCH and try for the original
header files?

Just move the call that tries the mmap of the pch file to the validation routine. The issue there is we'd need to think about trying to mmap twice. Currently, we only ever do it once. We would try and mmap more than once when there are multiple PCH files for the same source, as we run thought all of them, trying to validate each one.

Of course, the result will not necessarily be equivalent--the original headers might not be present, or might have been modified since the PCH was created.

This issue is known and expected and not an issue.

References:
- Re: [Bug pch/14400] Cannot compile qt-x11-free-3.3.0
  - From: Ian Lance Taylor

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