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Date: Thu, 01 Mar 2007 00:00:00 -0000
From: Daniel Jacobowitz <drow@false.org>
To: Michael Snyder <Michael.Snyder@palmsource.com>
Cc: gdb@sourceware.org
Subject: Re: gdb testsuite Makefile.in issue
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On Wed, Feb 28, 2007 at 03:32:29PM -0800, Michael Snyder wrote:
> Folks, 
> 
> The following line has frequently caused me problems:
> 
>       t='$(program_transform_name)'; echo runtest | sed -e '' $$t; \
> 
> I think you do not run into it if you have dejagnu in your
> source tree, or if your host == target.  But if those conditions
> are not met, this line bombs.
> 
> My shell script foo is not strong, but I believe it should be
> "sed -e '$$t';", not "sed -e '' $$t'"
> 
> Yes?  No?

Why should it be any of those?  It's just runtest, not
$target-runtest.  The line gets overridden anyway if you run make
check up a directory, I imagine that's why I never see it.

Anyway, gcc uses:

AR_FOR_TARGET := $(shell \
  if [ -f $(objdir)/../binutils/ar ] ; then \
    echo $(objdir)/../binutils/ar ; \
  else \
    if [ "$(host)" = "$(target)" ] ; then \
      echo $(AR); \
    else \
       t='$(program_transform_name)'; echo ar | sed -e $$t ; \
    fi; \
  fi)

So I would imagine that removing the '' is all it takes.  Or maybe
those are wrong too, I don't think they get used much.

-- 
Daniel Jacobowitz
CodeSourcery