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