Re: libltdl 2.2.2 compile problem on AIX system with compiler scripts

[Bob Friesenhahn]

On Fri, 16 May 2008, Tom Epperly wrote:
> > Have you looked at why this wrapper fails?  Perhaps you can add yet another 
> > wrapper which adds some extra "escaping" to the arguments (or re-write the 
> > arguments) so that they survive the problem wrapper? This would of course 
> > make the build a little bit slower.
> My understanding is that for argument processing in bash where you 
> potentially add or remove command line arguments, it's basically impossible 
> to preserve the argument quoting. You need to use another language, and the 
> system administrators use bash because it's the most common language for 
> things like this despite the rare problems with quoting.

It is better to use the term "difficult" or "challenging" rather than 
"impossible".  As an example, Autoconf and Libtool are most often 
executed via bash yet they do manage to mostly deal with preserving 
command line arguments ok (except for arguments containing spaces). 
It is necessary to add the right number of backslashes at the right 
points in order to make sure that the next level of shell processing 
sees the arguments as intended.

Depending on what the problem wrapper is doing, the problem might be 
easily solved by escaping some arguments on the way in, or it may be 
truely hopeless due to several levels of processing.

If the problem argument looks like:

  '-DLT_CONFIG_H=<config.h>'

then perhaps this translation might work

  '-DLT_CONFIG_H\=\<config.h\>'

or this

  "\'-DLT_CONFIG_H=<config.h>\'"

Bob
======================================
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/