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# $NetBSD: directive-ifndef.mk,v 1.6 2020/10/24 08:46:08 rillig Exp $
#
# Tests for the .ifndef directive, which can be used for multiple-inclusion
# guards. In contrast to C, where #ifndef and #define nicely line up the
# macro name, there is no such syntax in make. Therefore, it is more
# common to use .if !defined(GUARD) instead.
.ifndef GUARD
GUARD= # defined
. info guarded section
.endif
.ifndef GUARD
GUARD= # defined
. info guarded section
.endif
.if !defined(GUARD)
GUARD= # defined
. info guarded section
.endif
all:
@:;
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