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depsrc-ignore.mk revision 1.3 
      1 # $NetBSD: depsrc-ignore.mk,v 1.3 2020/08/29 15:06:33 rillig Exp $
      2 #
      3 # Tests for the special source .IGNORE in dependency declarations,
      4 # which ignores any command failures for that target.
      5 #
      6 # Even though ignore-errors fails, the all target is still made.
      7 # Since the all target is not marked with .IGNORE, it stops at the
      8 # first failing command.
      9 #
     10 # XXX: The messages in the output are confusing.
     11 # The "ignored" comes much too late to be related to the "false
     12 # ignore-errors".
     13 # The "continuing" is confusing as well since it doesn't answer the
     14 # question "continuing with what?".
     15 #
     16 # Even more interestingly, enabling the debugging option -de changes
     17 # the order in which the messages appear.  Now the "ignored" message
     18 # is issued in the correct position.  The manual page even defines the
     19 # buffering of debug_file and stdout, so there should be no variance.
     20 
     21 #.MAKEFLAGS: -de
     22 
     23 all: ignore-errors
     24 
     25 ignore-errors: .IGNORE
     26 	@echo $@ begin
     27 	false $@
     28 	@echo $@ end
     29 
     30 all:
     31 	@echo $@ begin
     32 	false $@
     33 	@echo $@ end
     34