cross-posted from: https://lemmy.ml/post/3229278
Suppose I’ve got a simple #Makefile w/ a few URLs that I’d like to process as dynamic targets.
For example here is a not working snippet:
.DEFAULT_GOAL := all ##### URLS = https://foo.example.com URLS += https://bar.example.com URLS += https://www.example.org ##### % : @echo the url is $(*) ##### .PHONY : all all : $(URLS)It fails w/
*** target pattern contains no ‘%’
I believe that’s b/c of the character
:being part ofURLSwhich confuses Make after expansion (order oAs a workaround, I’ve removed
https://from all URLs. For example this works:URLS = foo.example.com URLS += bar.example.comI know Make generally doesn’t play well w/ targets w/ space or colon in the name but I wonder if the above is the best I can do. What do you think?
You can escape the
:URLS = https\://foo.example.com URLS += https\://bar.example.com URLS += https\://www.example.orgAh…this explains why it works: https://savannah.gnu.org/bugs/?712#comment16
It’s a new feature \o/
#TIL
@pnutzh4x0r @[email protected] I’m not at my desk now but I doubt it will work. Make has no notion of escaping as far as I know.
I just tried it with GNU make 4.3 and it worked.
Oh, it works 🎉 Thank you!
For posterity here’s a complete example:
foo\:bar : @echo $(@)and then
$ make foo:bar foo:barThough, TBH, I don’t understand how this works 🤦♂️ I need to look into Make docs.
I didn’t try yet: https://www.cmcrossroads.com/article/gnu-make-escaping-walk-wild-side
colon := : $(colon) := : url := https$(:)//something
