Re: [Boost-build] new HDRSCAN output

Subject: Re: [Boost-build] new HDRSCAN output
From: Nogradi, Chris (Chris.Nogradi_at_[hidden])
Date: 2012-04-09 09:57:34

Steven,

I upgraded from 75774 to 77778 so it was a big jump!  I tried both 77725 and 77726 and saw the message appear for both. Any other versions you want me to try?

Chris

-----Original Message-----
From: boost-build-bounces_at_[hidden] [mailto:boost-build-bounces_at_[hidden]] On Behalf Of Steven Watanabe
Sent: Thursday, April 05, 2012 4:32 PM
To: Boost.Build developer's and user's list
Subject: Re: [Boost-build] new HDRSCAN output

AMDG

On 04/05/2012 01:59 PM, Nogradi, Chris wrote:
> What does this mean?
>
> HDRSCAN out of date for resource.h
> real  : (([^ ]+[ ]+(BITMAP|CURSOR|FONT|ICON|MESSAGETABLE|RT_MANIFEST)[ ]+([^ "]+|"[^"]+"))|(#include[ ]*(<[^<]+>|"[^"]+")))
> cached: #[     ]*include[ ]*(<(.*)>|"(.*)")
> HDRSCAN out of date for resource.h
> real  : #[     ]*include[ ]*(<(.*)>|"(.*)")
> cached: (([^ ]+[ ]+(BITMAP|CURSOR|FONT|ICON|MESSAGETABLE|RT_MANIFEST)[ ]+([^ "]+|"[^"]+"))|(#include[ ]*(<[^<]+>|"[^"]+")))
>
> Just appeared with SVN 77778
>

Can you find more precisely which commit
introduced this?  77726 and 77727 both
touched hcache.c, but I'm not sure how
they could have caused this.  Actually
I don't know why you didn't get this
message before.

What's happening is that resource.h is
being scanned for #includes multiple
times.  It's being #included from both
a resource file and a C++ source file.
The two have different scanners, and
the cache is per-file, so the cache is
invalidated whenever the scanner changes.

(This message should be harmless, but I'm
concerned about it because it indicates a
behavior change that I don't understand).

In Christ,
Steven Watanabe
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