On page 120 of the gnumake manual, it mentions support for pattern rules with multiple targets.
This pattern rule has two targets: %.tab.c %.tab.h: %.y bison -d $< So, if I have a simple rule that looks like: %.bar1 %.bar2 : %.foo touch $(*F).bar1 touch $(*F).bar2 and then do: > touch a.foo > make a.bar1 touch a.bar1 touch a.bar2 > make a.bar1 make: 'a.bar1' is up to date. > rm a.bar2 > make a.bar1 make: 'a.bar1' is up to date. > make a.bar2 touch a.bar1 touch a.bar2 What I was really hoping is that make would consider both a.bar1 and a.bar2 to be required outputs of the rule and if one of them is deleted, then both the .bar1 and .bar2 targets should be considered out-of-date. But when I manually remove the a.bar2 file, the a.bar1 file is still considered to be up-to-date. Yet, when I then ask to build the a.bar2 target, both the a.bar1 and a.bar2 targets are re-built. Is there any way to code a rule so that all targets must always be considered to have been built simultaneously. More so, if after the deletion of the a.bar2 file, some other rule that depends on a.bar1 file would cause make to consider both the a.bar1 and a.bar2 files to be out-of-date. I really hope there is some way to support my need for a recipe to build all specified targets and have subsequent rules that depends on any one or more of those targets thus force the re-build of said targets if any of them are missing. Thanks, -Tom
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