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[bug #46995] Within 'define' newline is treated as non whitespace

From: Brian Vandenberg
Subject: [bug #46995] Within 'define' newline is treated as non whitespace
Date: Tue, 15 Mar 2016 15:29:11 +0000
User-agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; Trident/7.0; rv:11.0) like Gecko

Follow-up Comment #3, bug #46995 (project make):

My apologies for the double-post.  I responded to the mailing list and that
didn't add it to the bug history.

> So I understand that the problem actually is that
> foreach adds whitespace into variable name.
>   $(foreach var , $(LIST), do something with $(var ))
> while in contrast for example 'call' knows to strip
> whitespace from a var name so this:
>   $(call var ,$(ARG))
> will actually invoke $(var) and not $(var ).

Yes, that's the jist of it.

> Don't think I can change the bug topic.
> Is that a known issue with an already open bug?

I don't know of one, but this is probably sufficient.

I can't think of a valid situation where someone would want leading/trailing
whitespace as part of a variable name, so it's probably safe to just call
strip( gmk_expand( argv[0] ) ) inside the C function backing $(foreach) and
have done with it.

It would still allow the temporary variable to use whitespace between
non-whitespace characters, and that seems like the most obscure case that
should be supported.

For clarity: this can be reproduced /without/ the define like so:

> $(foreach variable_name 
> , list of values 
> , expression 
> )

In that case the name of the variable has a space + newline at the end.


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