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


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?


-----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


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 HDRSCAN out of date for resource.h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 HDRSCAN out of date for resource.h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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