freebsd-src/unit-tests/directive-ifndef.mk
Simon J. Gerraty 302da1a3d3 Import bmake-20201101
Lots of new unit-tests increase code coverage.

Lots of refactoring, cleanup and simlpification to reduce
code size.

Fixes for Bug 223564 and 245807

Updates to dirdeps.mk and meta2deps.py
2020-11-07 19:39:21 +00:00

24 lines
543 B
Makefile

# $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:
@:;