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Re: Executing Perl pattern substitution inside a Makefile Frazer Worley Tue Feb 12 00:04:01 2008

Thanks - got that working:

  ${QUIET} ${CAT} ${VERA_LIBRARY_DEPS} | perl -ple
's/\$$\{(\w+)\}/$$ENV{$$1}/g' >> $@

Appreciate the help.

-Frazer


On Dec 18, 2007 12:25 AM, Paul Smith <[EMAIL PROTECTED]> wrote:

> On Mon, 2007-12-17 at 18:00 -0500, Frazer Worley wrote:
> > perl -ple 's/\$\{(\w+)\}/$ENV{$1}/g'
>
> Check the GNU make manual.  Any dollar sign ($) in a recipe is
> interpreted as a make variable reference and expanded before the recipe
> is passed to the shell.
>
> In order to escape dollar signs, you need to double them ($$).  So, use
> this instead:
>
>        perl -ple 's/\$$\{(\w+)\}/$$ENV{$$1}/g'
>
> --
>
> -------------------------------------------------------------------------------
>  Paul D. Smith <[EMAIL PROTECTED]>          Find some GNU make tips at:
>  http://www.gnu.org                      http://make.mad-scientist.us
>  "Please remain calm...I may be mad, but I am a professional." --Mad
> Scientist
>
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