1# $NetBSD: job-output-long-lines.mk,v 1.4 2020/11/01 17:29:13 rillig Exp $
2#
3# The jobs may produce long lines of output.  A practical case are the echoed
4# command lines from compiler invocations, with their many -D options.
5#
6# Each of these lines must be written atomically to the actual output.
7# The markers for switching jobs must always be written at the beginning of
8# the line, to make them clearly visible in large log files.
9#
10# As of 2020-09-27, the default job buffer size is 1024.  When a job produces
11# output lines that are longer than this buffer size, these output pieces are
12# not terminated by a newline.  Because of this missing newline, the job
13# markers "--- job-a ---" and "--- job-b ---" are not always written at the
14# beginning of a line, even though this is expected by anyone reading the log
15# files.
16
17.MAKEFLAGS: -j2
18
19100:=	${:U1:S,1,2222222222,g:S,2,3333333333,g}
205000:=	${100:S,3,4444444444,g:S,4,xxxxx,g}
21
22all: job-a job-b
23
24job-a:
25.for i in ${:U:range=20}
26	@echo ${5000:S,x,a,g}
27.endfor
28
29job-b:
30.for i in ${:U:range=20}
31	@echo ${5000:S,x,b,g}
32.endfor
33