Re: inconsistency of 'emptiness'?

[gk]

If forgot to add the following result, when FOO is set in the environment 
it works as you would hope:

address@hidden junk]$ export FOO=' '; make

FOO: origin=environment

This seems to indicate that the command line behavior is an anomaly/bug.
- Greg

At 03:23 PM 1/23/2003 -0800, I wrote:
> I have noticed inconsistent behavior when a variable contains a single space:
> * If the variable comes from the command-line, make thinks it is empty
> * If the variable is set in the makefile, make knows it is not empty
>
> # Makefile
> .PHONY: test
> i:=
> ifdef internal
> FOO:=$i #
> endif
>
> list:=hi there
>
> # if not empty, we clear the list
> ifneq ($(FOO),)
> list:=
> endif
>
> test:
>         @echo $(list)
>         @echo FOO: origin=$(origin FOO)
> #eof
>
> address@hidden junk]$ make
> hi there
> FOO: origin=undefined
> address@hidden junk]$ make FOO=' '
> hi there
> FOO: origin=command line
> address@hidden junk]$ make internal=1
>
> FOO: origin=file
> address@hidden junk]$
>
> Does this make sense? Is it documented? Is it a bug?
>
> - Greg Keraunen
> http://www.xmake.org
> http://www.xmlmake.com
>
>
>
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- Greg Keraunen
http://www.xmake.org
http://www.xmlmake.com