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