CM Basics - June 2006
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CM Basics offers readers the answers to their configuration
management
"how-to" questions with tips from the experts,
real-life case studies,
product reviews and industry news coverage.
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This Issue Sponsored by:
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- Do Metrics Matter? 5 Essential IT Metrics For Success
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In this Issue
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1. Ask Mr. Make: Rebuilding When a File's Checksum Changes
2. Part 3 - Subversion Guided Tour
3. WEBCAST: 12 Tasty Make Recipes - Part III
4. How can I improve performance on the Application of
ClearCase Labels?
5. Checkins
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Rebuilding When a File's Checksum Changes
by John Graham-Cumming
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Back in March 2006 I wrote about forcing GNU Make to rebuild
targets when commands change. Another common request is to
rebuild when the contents of a file change, and not just its
time stamp.
This usually comes up because the timestamps on generated
code, or in code extracted from a source code control
system, are older than related objects and hence GNU Make
does not know to rebuild the object. This can occur even
though the contents of the file are different from the last
time the object was built.
Read more from Mr. Make...
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Part 3 - Subversion Guided Tour
by Michal Dobisek
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This is the third part of our four-part introductory series
on Subversion (SVN). This part gives the guided tour through
the most important/frequent SVN usage scenarios. The
previous parts described the basic Subversion concepts (Part
1 - ht
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how to install and setup the environment (Part 2 - ht
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Finally, Part 4 will provide some hints for the process of
migrating from other RCSs to Subversion.
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WEBCAST: 12 Tasty Make Recipes - Part III
June 29, 2006 10 AM Pacific, 1 PM Eastern, 1800 UTC
In this session, John Graham-Cumming and John Ousterhout
continue their discussion of 12 field-tested tips for
optimizing Makefiles. “Recipe” 7 will cover rebuilding when
commands change; next, Recipe 8 will cover making nested
includes location independent; and finally, Recipe 9
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How can I improve performance on the Application of
ClearCase Labels?
by Charles Clarke III
===========================================
I am often asked questions like:
"Why does it take so long to apply a label to 30,000
elements."
The short answer is "because you are applying a label
to 30,000 elements".
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===========================================
Checkins
by Eric Sink
===========================================
There are several reasons why we may need to merge two
modified versions of a file:
-When using "edit-merge-commit" (sometimes
called "optimistic locking"), it is possible for
two developers to edit the same file at the same time.
-Even if we use "checkout-edit-checkin", we may
allow multiple checkouts, resulting once again in the
possibility of two developers editing the same file.
-When merging between branches, we may have a situation
where the file has been modified in both branches.
ht
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