Re: [PATCH] target/hexagon/idef-parser/prepare: use env to invoke bash

[Samuel Tardieu]

Michael Tokarev <mjt@tls.msk.ru> writes:

> > -#!/bin/bash
> > +#!/usr/bin/env bash
>
> What's the reason for this indirection?  bash has been /bin/bash 
> for decades,
> it is used this way in many other places in qemu code and in 
> other projects.
> Yes I know about current move /bin => /usr/bin etc, but the 
> thing is that
> traditional paths like this one (or like /bin/sh) is not going 
> away any time
> soon.  What's the matter here?

In addition to Stefan's answer, some modern systems use a per-user 
file system hierarchy where each user (or even each environment 
development for a user)  gets a global set of directories with 
only the applications they want. This is done either through 
adding each application directory into the user PATH or by using a 
set of user-specific bin/lib/... directories full of symlinks to 
the chosen applications.

In those environments, /usr/bin might only contain "env", such as 
"/usr/bin/env application" works. This is the case for example on 
NixOS, which is more and more used in research environments for 
their easily reproducible build environments.

 Sam
--
Samuel Tardieu
Télécom Paris - Institut Polytechnique de Paris