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Revision: 22294
at January 7, 2010 20:21 by michaelaskew
Initial Code 
NOTHING:=
SPACE:=$(NOTHING) $(NOTHING)
Initial URL 
http://braindumpery.com
Initial Description 
Make (and GMake) ignore spaces in many constructs, making it difficult to use a single space as a search string or a replacement string, for example. This trick works around the problem by assigning the space to a variable named SPACE and using that instead. So given this makefile:

    NOTHING:=
    SPACE:=$(NOTHING) $(NOTHING)
    NAME_WITH_UNDERSCORES:=$(subst $(SPACE),_,$(NAME))
    print : ; @echo $(NAME_WITH_UNDERSCORES)

The command

    gmake NAME="Professor Hubert Farnsworth"

would print

    Professor_Hubert_Farnsworth
Initial Title 
Search For or Replace Spaces
Initial Tags 
search, replace, filter
Initial Language 
Makefile