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Date: Fri, 29 Jan 2021 22:52:29 +0000
From: "Roland Illig" <rillig@netbsd.org>
Subject: CVS commit: src/usr.bin/make
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Module Name:	src
Committed By:	rillig
Date:		Fri Jan 29 22:52:29 UTC 2021

Modified Files:
	src/usr.bin/make: job.c

Log Message:
make(1): do not create empty shell files in jobs mode

In a chain of dependencies such as "all: build; build: do-build", the
intermediate targets do not have any commands.  In jobs mode,
nevertheless, an empty file was created and fed to the shell.  This was
unnecessary.  See jobs-empty-commands.mk.

The case of the special command line "...", which was suggested on
current-users, is not optimized since it doesn't occur in practice.

Suggested by Mateusz Guzik on current-users:
https://mail-index.netbsd.org/current-users/2021/01/26/msg040215.html


To generate a diff of this commit:
cvs rdiff -u -r1.398 -r1.399 src/usr.bin/make/job.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.