On Wed, 23 Apr 2014, Ludovic Courtès wrote:
Hello,
$program_transform_name is apparently meant to be used in makefiles
only, as suggested in the manual and in this comment from ‘configure’:
--8<---------------cut here---------------start------------->8---
# Double any \ or $.
# By default was `s,x,x', remove it if useless.
ac_script='s/[\\$]/&&/g;s/;s,x,x,$//'
program_transform_name=`$as_echo "$program_transform_name" | sed "$ac_script"`
--8<---------------cut here---------------end--------------->8---
The doubled $ and \ make it impossible to use it directly within
configure.ac.
What’s the recommended way to use it in configure.ac?
This is what I do in GraphicsMagick:
#
# program_transform_name is formed for use in a Makefile, so create a
# modified version for use in a shell script.
configure_transform_name=`echo ${program_transform_name} | sed 's,\\$\\$,$,'`
GMDelegateDefault=`echo gm | sed ${configure_transform_name}`
As far as I am aware, it has never caused a problem.
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/_______________________________________________
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