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Re: Executing Perl pattern substitution inside a Makefile
From: |
Paul Smith |
Subject: |
Re: Executing Perl pattern substitution inside a Makefile |
Date: |
Tue, 18 Dec 2007 00:25:55 -0500 |
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 <address@hidden> 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