> make[3]: Leaving directory `/home/tibbs/fvwm/doc'
> cp ./index.html index.html
> cp: `./index.html' and `index.html' are the same file
> make[2]: *** [index.html] Error 1
I need some help. I can't work out how to get make to do what I want.
I want to support both in-tree & out-of-tree builds.
In my case, for an in-tree build nothing needs to be done. For an
out-of-tree build, a file has to be copied to the build directory.
I used to use this:
all:
@for f in $(doc_DATA) ; do \
[ ! -f $$f ] && cp -p $(srcdir)/$$f $$f; \
done ; true
This had the desired effect except (in out-of-tree builds) make wouldn't
update the out-of-tree file(s) whenever the source file changed. So I
changed it to this (doc_DATA is just a bunch of .html files, by the way):
all: $(doc_DATA)
%.html: $(srcdir)/$@
@ cp $(srcdir)/$@ $@
This works perfectly on my system, but (as the failed snapshot build
last night indicates) it's obviously not portable.
Any pointers would be muchly appreciated.
Scott.
