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# $NetBSD: export-variants.mk,v 1.4 2020/10/24 08:46:08 rillig Exp $
#
# Test whether exported variables apply to each variant of running
# external commands:
#
# The != assignments.
# The :!cmd! modifier.
# The :sh modifier.
SHVAR!= env | grep ^UT_ || true
.if ${SHVAR} != ""
. warning At this point, no variable should be exported.
.endif
.if ${:!env | grep ^UT_ || true!} != ""
. warning At this point, no variable should be exported.
.endif
.if ${env | grep ^UT_ || true:L:sh} != ""
. warning At this point, no variable should be exported.
.endif
UT_VAR= value
.export UT_VAR
SHVAR!= env | grep ^UT_ || true
.if ${SHVAR} != "UT_VAR=value"
. warning At this point, a single variable should be exported.
.endif
.if ${:!env | grep ^UT_ || true!} != "UT_VAR=value"
. warning At this point, a single variable should be exported.
.endif
.if ${env | grep ^UT_ || true:L:sh} != "UT_VAR=value"
. warning At this point, a single variable should be exported.
.endif
all:
@:;
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