Hi again! On 01/02/16 21:29, Luke Shumaker wrote:
Here is an "improved" makefile that I think demonstrates the situation more clearly.default: a.foo %.foo: %.correct @echo $@ from $< %.foo: %.mislead @echo $@ from $< %.correct: %.correct_src @echo $@ from $< %.mislead: %.mislead_src @echo $@ from $< a.correct_src: @echo touch $@ # Note that there is no rule to make a.mislead_src # If the misleading_target line is commented out, 'default' succeeds: # > a.correct from correct_src # > a.foo from a.correct # If the line isn't commented out, 'default' fails: # > make: *** No rule to make target 'a.mislead', needed by 'a.foo'. Stop. misleading_target: a.mislead
I had to work through this several times to convince myself that this wasn't a simple misunderstanding of trying to apply ≤3.81 pattern rules in a post-3.82 world. Without looking at the source, this feels a lot like the .DELETE_ON_ERROR: bug that was in either 3.81 or 3.82 (I can't recall which).
A little more info which might be pertinent... In moving to a newer Kubuntu (14.04 to 16.04), I've implicitly switched from GNU Make 3.81 to 4.1. Having hit what is likely the same problem, I had to try out some other versions. Both the code I'm working on now and Luke's test above manifest a problem in 3.82, 4.1 and 4.2.1, but not in 3.81.
Cheers, Steven _______________________________________________ Help-make mailing list Help-make@gnu.org https://lists.gnu.org/mailman/listinfo/help-make
