1# $NetBSD: directive-export.mk,v 1.8 2021/02/16 19:01:18 rillig Exp $ 2# 3# Tests for the .export directive. 4# 5# See also: 6# directive-misspellings.mk 7 8# TODO: Implementation 9 10INDIRECT= indirect 11VAR= value $$ ${INDIRECT} 12 13# Before 2020-12-13, this unusual expression invoked undefined behavior since 14# it accessed out-of-bounds memory via Var_Export -> ExportVar -> MayExport. 15.export ${:U } 16 17# A variable is exported using the .export directive. 18# During that, its value is expanded, just like almost everywhere else. 19.export VAR 20.if ${:!env | grep '^VAR'!} != "VAR=value \$ indirect" 21. error 22.endif 23 24# Undefining a variable that has been exported implicitly removes it from 25# the environment of all child processes. 26.undef VAR 27.if ${:!env | grep '^VAR' || true!} != "" 28. error 29.endif 30 31# No syntactical argument means to export all variables. 32.export 33 34# An empty argument means no additional variables to export. 35.export ${:U} 36 37 38# Trigger the "This isn't going to end well" in ExportVarEnv. 39EMPTY_SHELL= ${:sh} 40.export EMPTY_SHELL # only marked for export at this point 41_!= :;: # Force the variable to be actually exported. 42 43 44all: 45