sbsv2/raptor/notes/tcom_allbefore.txt
author Ross Qin <ross.qin@nokia.com>
Tue, 30 Nov 2010 14:05:41 +0800
changeset 713 7b7f0409fc00
parent 616 24e4ef208cca
permissions -rw-r--r--
merge
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This change causes trace compilation to be performed for all source files in a 
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component before any of those files is compiled.
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This should reduce the impact of clashes where the tracecompiler ends up writing the same
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trace headers twice if two mmps in a component share source code.  The reduced impact is 
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that the clash can be detected before any dependent object files are built thus the
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rebuilding that normally happens after a clash detection is not necessary.
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There is another problem where some components have static libraries and dlls 
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that share common source files.  If tracing is enabled for the DLL these common 
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files try to include their trace headers.  When the source files are being built
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into the static library they also try to include trace headers which may not have 
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been generated yet because tracing is not enabled for static libraries at this time
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since they don't have UIDs or any unique id to associate any trace points with.
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This change cannot fix this problem just as it doesn't prevent clashes but it at
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least makes sure that all trace headers exist before anything could possibly try 
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to use them. This helps the build succeed while work is done to remove clashes and the static
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library tracing problem and it is no more incorrect than the current situation.
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