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# $NetBSD: directive-export.mk,v 1.6 2020/12/13 01:07:54 rillig Exp $
#
# Tests for the .export directive.
#
# See also:
# directive-misspellings.mk
# TODO: Implementation
INDIRECT= indirect
VAR= value $$ ${INDIRECT}
# Before 2020-12-13, this unusual expression invoked undefined behavior since
# it accessed out-of-bounds memory via Var_Export -> ExportVar -> MayExport.
.export ${:U }
# A variable is exported using the .export directive.
# During that, its value is expanded, just like almost everywhere else.
.export VAR
.if ${:!env | grep '^VAR'!} != "VAR=value \$ indirect"
. error
.endif
# Undefining a variable that has been exported implicitly removes it from
# the environment of all child processes.
.undef VAR
.if ${:!env | grep '^VAR' || true!} != ""
. error
.endif
# No argument means to export all variables.
.export
all:
@:;
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