how to check for file existence in a makefile?

  what is the standard way to check for file existence in a
makefile
and bail if it doesn't exist?  personally, i use:

$(if $(wildcard <file>),,$(error "<file> is
missing, bye bye."))

is there a better or more popular way?

rday
--

============================================================
============
Robert P. J. Day
Linux Consulting, Training and Annoying Kernel Pedantry:
    Have classroom, will lecture.

http://crashcourse.ca   
                      Waterloo, Ontario, CANADA
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On Thu, 2008-02-14 at 02:35 -0500, Robert P. J. Day wrote:
> what is the standard way to check for file existence in
a makefile
> and bail if it doesn't exist?  personally, i use:
> 
> $(if $(wildcard <file>),,$(error
"<file> is missing, bye bye."))
> 
> is there a better or more popular way?

That's the way I would do it.  Or, if you like, you could
use the new
$(or ...) operator (I'm an old Lisp person )

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 Paul D. Smith <psmithgnu.org>          Find
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