1# $NetBSD: varname-dot-parsefile.mk,v 1.5 2020/10/24 08:50:17 rillig Exp $
2#
3# Tests for the special .PARSEFILE variable, which contains the basename part
4# of the file that is currently parsed.
5
6.if ${.PARSEFILE} != "varname-dot-parsefile.mk"
7.  error
8.endif
9
10# During parsing, it is possible to undefine .PARSEFILE.
11# Not that anyone would ever want to do this, but there's code in parse.c,
12# function PrintLocation, that explicitly handles this situation.
13.if !defined(.PARSEFILE)
14.  error
15.endif
16.undef .PARSEFILE
17.if defined(.PARSEFILE)
18.  error
19.endif
20
21# The variable .PARSEFILE is indirectly used by the .info directive,
22# via PrintLocation.
23.info At this point, .PARSEFILE is undefined.
24
25# There is absolutely no point in faking the location of the file that is
26# being parsed.  Technically, it's possible though, but only if the file
27# being parsed is a relative pathname.  See PrintLocation for details.
28.PARSEFILE=	fake-parsefile
29.info The location can be faked in some cases.
30
31# After including another file, .PARSEFILE is reset.
32.include "/dev/null"
33.info The location is no longer fake.
34
35all:
36	@echo At run time, .PARSEFILE is ${.PARSEFILE:Uundefined}.
37