Date: Fri, 12 Jun 98 22:40:22 -0400
From: cr@jcmax.com (Cyrus Rahman)
To: freebsd-smp@FreeBSD.ORG
Subject: Parallel kernel builds/vnode_if.{h,c}
Message-ID: <9806130240.AA17990@corona.jcmax.com>
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I don't recall seeing any mention of this, but parallel kernel builds
fail with some random chance because the files vnode_if.{c,h} get built
twice, and with multiple jobs and multiple processors, frequently
at the same time (so that the output of both builds is intermingled).
Perhaps there is a better way of serializing the build, but the problem
can be fixed by having the dependencies for each of these files instead
trigger a pseudo-target, e.g.:
vnode_if.c: $S/kern/vnode_if.sh $S/kern/vnode_if.src vnode_if
vnode_if.h: $S/kern/vnode_if.sh $S/kern/vnode_if.src vnode_if
vnode_if:
sh $S/kern/vnode_if.sh $S/kern/vnode_if.src
instead of what is now used:
vnode_if.c: $S/kern/vnode_if.sh $S/kern/vnode_if.src
sh $S/kern/vnode_if.sh $S/kern/vnode_if.src
vnode_if.h: $S/kern/vnode_if.sh $S/kern/vnode_if.src
sh $S/kern/vnode_if.sh $S/kern/vnode_if.src
Make will then serialize the construction of the two original targets since
all the work is performed through the single pseudo-target.
Cyrus
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