diff options
| author | Marc Espie <espie@cvs.openbsd.org> | 2008-03-02 23:56:59 +0000 |
|---|---|---|
| committer | Marc Espie <espie@cvs.openbsd.org> | 2008-03-02 23:56:59 +0000 |
| commit | 72b606857252415fdb67a9dc9262a32c9748fab2 (patch) | |
| tree | b28f5d229f7f0bbc6975902b6352deb555137b59 /usr.bin | |
| parent | f2d04a500e36a76806f853d56e29278e59eaee2d (diff) | |
document the two big bugs left that somewhat hinder parallel mode.
Diffstat (limited to 'usr.bin')
| -rw-r--r-- | usr.bin/make/make.1 | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/usr.bin/make/make.1 b/usr.bin/make/make.1 index d0a7484e291..aa7c1e496b0 100644 --- a/usr.bin/make/make.1 +++ b/usr.bin/make/make.1 @@ -1,4 +1,4 @@ -.\" $OpenBSD: make.1,v 1.77 2007/12/01 17:45:02 jmc Exp $ +.\" $OpenBSD: make.1,v 1.78 2008/03/02 23:56:58 espie Exp $ .\" $OpenPackages$ .\" $NetBSD: make.1,v 1.18 1997/03/10 21:19:53 christos Exp $ .\" @@ -31,7 +31,7 @@ .\" .\" from: @(#)make.1 8.4 (Berkeley) 3/19/94 .\" -.Dd $Mdocdate: December 1 2007 $ +.Dd $Mdocdate: March 2 2008 $ .Dt MAKE 1 .Os .Sh NAME @@ -1430,3 +1430,19 @@ will evaluate to a b c d after the loop, not z b c d. .Ic ORDER is only used in parallel mode, so keep dependency ordered for sequential mode! +.Pp +Distinct target names are treated separately, even though they might +correspond to the same file in the file system. +This can cause excessive rebuilds of some targets, and bogus +races in parallel mode. +This can also prevent +.Nm +from finding a rule to solve a dependency if the target name is not +exactly the same as the dependency. +.Pp +In parallel mode, +.Fl j Ar n +only limits the number of concurrent makes it knows about. +During recursive invocations, each level will multiply the number +of processes by +.Ar n. |