config.guess is incompatible with pre-POSIX shells

[Jacob Bachmeyer]

I am currently in the process of producing a DejaGnu release and I have 
run into a bit of a problem:  unlike most GNU packages, DejaGnu installs 
config.guess and uses it at runtime if the build system triplet has not 
otherwise been specified.  DejaGnu is installed into an 
architecture-independent tree, and therefore cannot rely on 
substitutions made by configure.  On Solaris 10, /bin/sh is a non-POSIX 
shell and fails to execute config.guess because POSIX "$(...)" command 
substitutions are used instead of the traditional backticks.

I have recently fixed similar non-portabilities in the shell scripts 
packaged with DejaGnu (thanks to Rainer Orth for reporting the issues) 
and would be willing to write a patch for config.guess and possibly 
config.sub to restore portability if that patch would be acceptable.


-- Jacob