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Date: Tue, 06 Nov 2001 10:30:00 -0000
From: Michael Elizabeth Chastain <mec@shout.net>
Message-Id: <200111151716.LAA21357@duracef.shout.net>
To: bjh21@cam.ac.uk, gdb-patches@sources.redhat.com
Subject: Re: sim/arm/Makefile.in fix for non-GNU make
X-SW-Source: 2001-11/txt/msg00087.txt.bz2

Ben Harris writes:

> sim/arm/Makefile.in currently uses $< in a non-implicit rule.  This
> doesn't work with non-GNU makes (at least NetBSD's one) since $< isn't set
> for non-implicit rules.

I got curious, so I checked the Single Unix Spec for make:

  http://www.opengroup.org/onlinepubs/007908799/xcu/make.html

It says:

   $<
          In  an  inference  rule,  $<  evaluates  to  the filename whose
          existence  allowed  the  inference  rule  to  be chosen for the
          target.  In  the  .DEFAULT  rule, the $< macro evaluates to the
          current  target  name.  The  $<  macro  is  evaluated  only for
          inference  rules.  For  example, in the .c.a inference rule, $<
          represents the prerequisite .c file.

So I think this is a good patch.

My two cents,

Michael C