Date: Sun, 22 Sep 2013 19:27:10 -0400 From: Glen Barber <gjb@FreeBSD.org> To: Ian Lepore <ian@FreeBSD.org> Cc: FreeBSD Hackers <freebsd-hackers@FreeBSD.org>, freebsd-current <freebsd-current@FreeBSD.org> Subject: Re: The right way to invoke sh from a freebsd makefile? Message-ID: <20130922232710.GD2336@glenbarber.us> In-Reply-To: <1379891905.1197.115.camel@revolution.hippie.lan> References: <1379891905.1197.115.camel@revolution.hippie.lan>
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On Sun, Sep 22, 2013 at 05:18:25PM -0600, Ian Lepore wrote:
> What's the right way to launch the bourne shell from a makefile? I had
> assumed the ${SHELL} variable would be set to "the right" copy
> of /bin/sh (like maybe the one in tmp or legacy at various stages). It
> appears that that's not the case, and ${SHELL} is whatever comes from
> the environment, which can lead to using csh or bash or whatever.
>=20
> I see some of our makefiles use just a bare "sh" which seems reasonable
> to me, but I don't want to glitch this in src/include/Makefile again.
> The goal is to run a script in src/include/Makefile by launching sh with
> the script name (as opposed to launching the script and letting the #!
> do its thing, which doesn't work if the source dir is mounted noexec).
>=20
I think BUILDENV_SHELL is what you are looking for. For this specific
case, I think instead of '#!/bin/sh', maybe '#!/usr/bin/env sh' may be
preferable.
Glen
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