how to get a directory's "full" name?

  as part of my multi-arch build, i need to convert a
(probably)
relative directory name to its full name.  that is, if
someone refers
to "..", i need to get the full directory name
of ".."

  this "function" seems to work:

real-dir = $(shell cd $ ; echo $$)

cd to arg, then echo full dir name.  is there a simpler or
built-in
way that's better?

rday


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> cd to arg, then echo full dir name.  is there a simpler
or built-in
> way that's better?

the unix command dirname gives the directory name
see also basename for getting file name in a similar manner

-aditya


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%% "Aditya Kher" <aditya.khergmail.com> writes:

  >> cd to arg, then echo full dir name.  is there a
simpler or built-in
  >> way that's better?

  ak> the unix command dirname gives the directory name
  ak> see also basename for getting file name in a
similar manner

dirname and basename are simply string munchers: they break
up strings
on "/" etc.  They do NOT evaluate their
arguments to find
fully-qualified pathnames.

In addition, the make functions $(dir ...), $(notdir ...),
$(basename ...),
etc. are much better/faster for this kind of thing, as long
as you don't
need to work on a shell variable.

-- 
------------------------------------------------------------
-------------------
 Paul D. Smith <psmithgnu.org>          Find
some GNU make tips at:
 http://www.gnu.org        
             http://make.paulandlesl
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 "Please remain calm...I may be mad, but I am a
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%% "Robert P. J. Day" <rpjdaymindspring.com> writes:

  rpjd> as part of my multi-arch build, i need to convert
a (probably)
  rpjd> relative directory name to its full name.  that
is, if someone
  rpjd> refers to "..", i need to get the
full directory name of ".."

  rpjd> this "function" seems to work:

  rpjd> real-dir = $(shell cd $ ; echo $$)

This is not portable; not all shells set or track the PWD
environment
variable.

  rpjd> cd to arg, then echo full dir name.  is there a
simpler or built-in
  rpjd> way that's better?

If you're willing to limit your makefiles to newer versions
of make you
can use the $(abspath ...) or $(abspath ...) functions.

-- 
------------------------------------------------------------
-------------------
 Paul D. Smith <psmithgnu.org>          Find
some GNU make tips at:
 http://www.gnu.org        
             http://make.paulandlesl
ey.org
 "Please remain calm...I may be mad, but I am a
professional." --Mad Scientist


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