[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Creating a unique list from a bunch of duplicates
From: |
Noel Yap |
Subject: |
Re: Creating a unique list from a bunch of duplicates |
Date: |
Wed, 26 May 2004 11:04:32 -0400 |
User-agent: |
Mozilla Thunderbird 0.5 (Windows/20040212) |
Are you sure you need to preserve the order? Exactly what do you intend to do
with the unique list?
If you really need the order preserved, without testing it, try something like:
unique = $(if $(1),$(call unique,$(wordlist 2,$(words $(1)),$(1)),$(if $(filter
$(firstword $(1)),$(2)),$(2),$(firstword $(1)) $(2))),$(2))
Noel
J.Davison de St.Germain wrote:
Hi,
I need to be able to take a list of directories and remove the
duplicates without sorting the list. For example, if I have "-L/abc/lib
-L/def/lib -L/abc/lib" I would like to get back "-L/abc/lib
-L/def/lib". I would like to do this within make so that I don't have
to call a bunch of shell functions. I've talked to a number of other
gmake makefile writers and they agree that this would be very helpful.
Is there such a function in make? (Like $(unique list) or some such?)
If not, has someone well versed in functional programming put together a
bunch of filter/foreach/search/etc functions to do this? Any help on
this would be greatly appreciated. Also, if you know of a better
location to send this request to, please let me know.
Sincerely,
J. Davison de St. Germain
PS. My search of the mailing list archive only gave me one hit and that
was to use sort. As I mention above, I need the list to stay in the
same order. Thanks!
-----------------------------------------------------------------------
- J. Davison de St. Germain address@hidden (801) 581-4078 -
- Chief Software Engineer http://www.cs.utah.edu/~dav -
- SCI Institute, SE C-SAFE University of Utah -
-----------------------------------------------------------------------
_______________________________________________
Help-make mailing list
address@hidden
http://mail.gnu.org/mailman/listinfo/help-make