On 2007-11-20 11:02Z, Robert P. J. Day wrote:
> wanted: a simple way to transform the string (and its entries):
>
> -Ia -I/b -Ic -I/d
>
> to
>
> -I/src/a -I/b -I/src/c -I/d
>
> in short, wherever an entry represents a location that is *not*
> fully-qualified, i want to replace that entry with one that is now
> fully-qualified (and for which i will supply the appropriate prefix).
/tmp[0]$cat subst.make
original := -Ia -I/b -Ic -I/d
modified := $(shell echo $(original) | sed -e 's|-I\([^/]\)|-I/src/\1|g')
.PHONY: all
all:
@echo original: $(original)
@echo modified: $(modified)
/tmp[0]$make -f subst.make
original: -Ia -I/b -Ic -I/d
modified: -I/src/a -I/b -I/src/c -I/d
> is there a simple way to do with one "patsubst" operator?
I don't see how to do it with just one.
> i can see
> a couple obvious ways with "foreach", but the tricky bit is that i'm
> trying to invoke patsubst in places that *don't* match a given pattern
> (that being "-I/").
What transformation do you want for "-I/"?
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