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varname-dot-parsefile.mk revision 1.7 
      1 # $NetBSD: varname-dot-parsefile.mk,v 1.7 2023/06/21 07:30:50 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 # See also
      7 #	varname-dot-includedfromdir.mk
      8 #	varname-dot-includedfromfile.mk
      9 #	varname-dot-parsedir.mk
     10 #
     11 # History
     12 #	.PARSEDIR and .PARSEFILE were added on 1999-08-09.
     13 
     14 .if ${.PARSEFILE} != "varname-dot-parsefile.mk"
     15 .  error
     16 .endif
     17 
     18 # During parsing, it is possible to undefine .PARSEFILE.
     19 # Not that anyone would ever want to do this, but there's code in parse.c,
     20 # function PrintLocation, that explicitly handles this situation.
     21 .if !defined(.PARSEFILE)
     22 .  error
     23 .endif
     24 .undef .PARSEFILE
     25 .if defined(.PARSEFILE)
     26 .  error
     27 .endif
     28 
     29 # The variable .PARSEFILE is indirectly used by the .info directive,
     30 # via PrintLocation.
     31 # expect+1: At this point, .PARSEFILE is undefined.
     32 .info At this point, .PARSEFILE is undefined.
     33 
     34 # There is absolutely no point in faking the location of the file that is
     35 # being parsed.  Technically, it's possible though, but only if the file
     36 # being parsed is a relative pathname.  See PrintLocation for details.
     37 .PARSEFILE=	fake-parsefile
     38 .info The location can be faked in some cases.
     39 
     40 # After including another file, .PARSEFILE is reset.
     41 .include "/dev/null"
     42 # expect+1: The location is no longer fake.
     43 .info The location is no longer fake.
     44 
     45 all:
     46 	@echo At run time, .PARSEFILE is ${.PARSEFILE:Uundefined}.
     47