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From: Tomi Ollila <tomi.ollila@iki.fi>
To: David Bremner <david@tethera.net>, Fraser Tweedale <frase@frase.id.au>,
	notmuch@notmuchmail.org
Subject: Re: [PATCH] configure: use cc/c++ when GCC not installed
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On Wed, May 21 2014, David Bremner <david@tethera.net> wrote:

> Tomi Ollila <tomi.ollila@iki.fi> writes:
>>
>> hash is builtin in modern shells, and is command in some systems
>> which(1) is builtin in zsh (only?). Solaris 10 which(1) exits 0
>> even the command is not found.
>>
>> Tomi
>
> I thought "command -v" was the posix way of testing for a binary?


Ok, I wrote quite a few lines why hash instead of command -v,
just to finally notice this:

$ dash -c 'hash zapdsb=C2=A0|| echo foo'
dash: 1: hash: zapdsb=C2=A0: not found
foo

which is ok... but:

$ ksh -c 'hash zapdsb=C2=A0|| echo foo'
$ mksh -c 'hash zapdsb=C2=A0|| echo foo'

Wat! hash in these shells do not exit nonzero -- so good with my which(1)
rant >;/

So I change my preference totally -- `command -v` instead of `hash` -- we
have to fix the current uses of `hash` too...


> d


Tomi