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VPATH question - Gnu make vs. Lucent nmake

From: Meinecke, Jon
Subject: VPATH question - Gnu make vs. Lucent nmake
Date: Tue, 30 Aug 2005 10:51:14 -0500

I'm trying to setup a veiwpath source/build tree environment
with Gnu make similar to that supported by Lucent nmake.
The model is a common source tree, a common build tree,
and a developer source/build tree.  The goal is to use built
targets in the common tree unless there is a source file
in the developer tree.  These "local" source files should
always take precedence over common source files, even
if older.
gmake's VPATH and vpath work fine for locating sources and
targets, but I don't see an obvious way to force a local build
target when the local source file is older than the common 
built object.
Is this possible with gmake?
I've checked the list archives and couldn't find an obvious answer.
If this has already been discussed, please refer me to the
relevant threads.
Jon Meinecke

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