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gmake help with removing duplicate files
From: |
Jonathan |
Subject: |
gmake help with removing duplicate files |
Date: |
Wed, 30 Jan 2008 18:41:57 -0800 (PST) |
User-agent: |
G2/1.0 |
All,
I have an interesting filter problem (I think). I would like to
remove duplicate filenames -- unfortunately, it is not quite as easy $
(sort ...).
I have 2 lists of files where one list has files with path prefixes
and one doesn't. Some of these filenames (but not paths) are
duplicated. I would like to combine the 2 into 1 list, with no
duplicates of the filenames.
My lists have hundreds of items each, but here is a simple example:
LIST1 := file1.o file2.o file3.o
LIST2 := path/file3.o path/file4.o path/file5.o
Desired result of:
LIST := file1.o file2.o file3.o path/file4.o path/file5.o
I thought that this would do it:
LIST3 = $(foreach xxx,$(LIST1),$(filter-out %$(xxx),$(LIST2)))
LIST = $(LIST1) $(LIST3)
but what that returns is a concatenated result for each loop (!?!):
LIST = file1.o file2.o file3.o path/file3.o path/file4.o path/file5.o
path/file3.o path/file4.o path/file5.o path/file4.o path/file5.o
So "path/file3.o path/file4.o path/file5.o" appears twice (since
file1.o and file2.o didnt filter out any values) then finally "path/
file4.o path/file5.o" (since file3.o filtered out path/file3.o).
The solution would appear to somehow pass the output of the $(filter-
out...) back in recursively. I am clueless as to do that...
Many thanks for any help...
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