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RE: Parallel builds and SUBDIRS
From: |
Dan Kegel |
Subject: |
RE: Parallel builds and SUBDIRS |
Date: |
Fri, 17 May 2002 23:05:59 -0700 |
The Right Way to do this is to include all the
subdir makefile fragments into one big happy
make; then no special locking is needed.
(A la "recursive make considered harmful".)
Boy, that's a big change, though.
- Dan
-----Original Message-----
From: Harlan Stenn
To: address@hidden
Sent: 5/17/2002 5:41 PM
Subject: Parallel builds and SUBDIRS
First, I'm not saying this is a good idea.
I'm working on a project where Somebody decided it would be a feature to
hack the automake templates to permit subdirs to be built in parallel.
They implemented an additional level of locking to prevent, for example,
a
library that is needed by multiple subdirs from being built
simultaneously.
I'm wondering if there is benefit to allowing SUBDIRS to be build in
parallel by option (or default), and wondering if it's possible,
reasonable,
and not too difficult to use dependency lines in the "parent"
Makefile.am to
control serialization, ie:
SUBDIRS = include lib bar baz foo
lib: include
bar baz foo: lib
so that in a parallel build situation, we'd build include first, then
lib,
then bar, baz and foo in parallel.
Comments?
H