Re: [jamboost] Remove "whence" from build.sh

From: Martin Wille (mw8329_at_[hidden])
Date: 2005-06-21 23:25:38

Rene Rivera wrote:
> Craig Rodrigues wrote:
> 
>>Hi,
>>
>>The "whence" command is not available on all Unix variants,
> 
> 
> You mean all "shells" not "Unix variants".
> 
> 
>>so I suggest that it be replace by "type"
>>which is builtin for the /bin/sh shell.
> 
> 
> "whence" *is* a builtin for bourne shell. You must mean that it's not a 
> builtin for bash.

I don't think "whence" is a builtin for bourne shell, at least not for
older versions of it. It is a builtin for korn shell. However, "type"
isn't a builtin, either.

>>This will get rid of error messages that build.sh prints out
>>when I build bjam on Linux and FreeBSD.
> 
> 
> OK, I never got warnings on RedHat, so I guess it has a real bourne 
> shell (or something closer to a real one) instead of a symlink from "sh" 
> to "bash".
> 
> Sorry but I can't apply the patch as it's going to break other Unix like 
> systems, like OpenBSD and Solaris. Is there some way to check that the 
> shell isn't really a bourne shell but a bash shell?

bash sets a couple of variables, e.g. BASH and BASH_VERSION.
pdksh sets KSH_VERSION. ksh sets {.sh.version}.

Regards,
m
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