.DELETE_ON_ERROR ?

[Stepan Kasal]

Hello,
  I've just stumbled over this problem:
Makefile.am contains:

foo.h: foo.x
        $(GENERATOR) foo.x >foo.h

But the GENERATOR command failed and I have empty foo.h.

It would be nice if make deleted foo.h automatically, but this is not the
historical practice.  GNU make enables you to change its behaviour by
mentioning a target:

.DELETE_ON_ERROR:

Could Automake possibly add this target to all generated Makefile.in's?

I understand that the problem is that we want to write portable Makefiles.
OTOH, this change doesn't prevent build from scratch with non-GNU makes.
And most developers use GNU make, and this change can help them with their
work.

WDYT?

Stepan Kasal