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Re: should bash, bash -v and bash -x behave identically?

From: Chet Ramey
Subject: Re: should bash, bash -v and bash -x behave identically?
Date: Thu, 17 May 2001 11:57:46 -0400

> I'm configuring imagemagick 5.3.3.  I'm on solaris 2.7.
> I didn't like the values its finding, so I wanted to 
> trace configure.
> Turns out I hit something interesting:
>       bash -x  (and bash, and sh -vx) run fine
>       bash -v (and bash -vx) does bizarre things
>       (the value of CPP should be "gcc -E", instead its /lib/cpp
>       and it stops there...
> Shouldn't bash -x, bash -vx, and bash -v do the same things?

I don't believe so.  -v says to echo the shell input as it's read.
-x says to echo the expanded command just before it's executed.

``The lyf so short, the craft so long to lerne.'' - Chaucer
( ``Discere est Dolere'' -- chet)

Chet Ramey, CWRU    address@hidden    http://cnswww.cns.cwru.edu/~chet/

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