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List:       hpux-cxx-dev
Subject:    CXX-DEV: RE: make problem
From:       "Veygel, Mario" <mario.veygel () hp ! com>
Date:       2008-04-09 13:10:20
Message-ID: 1D965D8892DB34459EC3EF1E98F763580D20DE4D5C () G1W0479 ! americas ! hpqcorp ! net
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> > What's problem about the $*?  (and $< is also null)
> > For example
> > #cat a1.mk
> > a1: a1.o
> >          @echo "compile a1..."
> >          aCC -Ae -c $*.c
> > # make -f a1.mk a1
> > compile a1...
> >         aCC -Ae -c .c
> > aCC: error 1913: `.c' does not exist or cannot be read
> > *** Error exit code 1
>
> From man make:
>
>       $*             The macro $* is the current target name
> with the suffix
>                      deleted.  It is evaluated only for
> inference rules.
>
> Your target is a1 which has no suffix. The manpage doesn't
> say what it would do if there is no suffix. Looks like when
> trying to delete the nonexistent suffix, it deletes a1 instead.

BTW, your rule is not an inference rule. Infererence rules are e.g.

  .c:
  .c.o:

So $* may not work anyway here.

Mario

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