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# $NetBSD: varname-dot-make-pid.mk,v 1.3 2022/01/23 21:48:59 rillig Exp $
#
# Tests for the special .MAKE.PID variable, which contains the process ID of
# the make process itself.
# The process ID must be a positive integer.
.if ${.MAKE.PID:C,[0-9],,g} != ""
. error
.elif !(${.MAKE.PID} > 0)
. error
.endif
# Ensure that the process exists.
_!= kill -0 ${.MAKE.PID}
all: .PHONY
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