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aprell/Makefile

Created August 22, 2017 12:56
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GNU make special target: .ONESHELL
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Makefile
.ONESHELL:
foo:
@foo=defined
echo $${foo:-undefined}
.PHONY: foo
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aprell commented Aug 22, 2017

From https://www.gnu.org/software/make/manual/html_node/Special-Targets.html:

If .ONESHELL is mentioned as a target, then when a target is built all lines of the recipe will be given to a single invocation of the shell rather than each line being invoked separately.

See also: https://www.gnu.org/software/make/manual/html_node/One-Shell.html

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