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[bug #27047] Difficulties defining prerequisites for pattern targets.
From: |
Paul D. Smith |
Subject: |
[bug #27047] Difficulties defining prerequisites for pattern targets. |
Date: |
Sun, 02 Aug 2009 00:27:20 +0000 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.12) Gecko/2009070812 Ubuntu/8.04 (hardy) Firefox/3.0.12 |
Follow-up Comment #4, bug #27047 (project make):
The failure you are reporting is actually documented behavior; the
documentation for target-specific variables says:
As with automatic variables, these values are only available within the
context of a target's command script (and in other target-specific
assignments).
So, they are not available for expansion in prerequisites.
As Boris points out you can use the secondary expansion feature for this, at
a slight performance penalty.
As for the pattern rule canceling behavior: I agree it's probably not the
best choice but it's been like that in GNU make since pattern rules were
invented and can't be changed now.
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