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# $NetBSD: varname-dot-shell.mk,v 1.7 2021/02/04 21:42:47 rillig Exp $
#
# Tests for the special .SHELL variable, which contains the shell used for
# running the commands.
#
# This variable is read-only.
.MAKEFLAGS: -dcpv
ORIG_SHELL:= ${.SHELL}
.SHELL= overwritten
.if ${.SHELL} != ${ORIG_SHELL}
. error
.endif
# Trying to append to the variable.
# Since 2020-10-30 this is prevented.
.MAKEFLAGS: .SHELL+=appended
.if ${.SHELL} != ${ORIG_SHELL}
. error
.endif
# Trying to delete the variable.
# This has no effect since the variable is not defined in the global scope,
# but in the command-line scope.
.undef .SHELL
.SHELL= newly overwritten
.if ${.SHELL} != ${ORIG_SHELL}
. error
.endif
.MAKEFLAGS: -d0
all:
@:;
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