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From: | Eric Melski |
Subject: | Re: Make question |
Date: | Fri, 5 Feb 2010 08:40:09 -0800 |
User-agent: | Thunderbird 2.0.0.23 (X11/20090817) |
Canham, Timothy K (316C) wrote:
We have code generation, and we have a rule like this: fileout1.txt fileout2.txt fileout3.txt: filein.txt filegen.sh filein.txt We run a parallel make (make -j x), and what I've found is that the rule often gets invoked three times, causes files to overwrite each other. ... Is there a way to specify the rule so that the rule is only invoked once in a parallel make, or is there a technique that accomplishes the same thing? Have a look at my article "Rules with Multiple Outputs in GNU Make" at CM Crossroads: http://cmcrossroads.com/ask-mr-make/12908-rules-with-multiple-outputs-in-gnu-makeThat covers the various techniques for solving this problem and the pros and cons of each. HTH, Eric Melski Electric Cloud, Inc. http://blog.electric-cloud.com/ |
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