[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <87efldr9np.fsf@concordia.ellerman.id.au>
Date: Thu, 22 Feb 2018 14:22:02 +1100
From: Michael Ellerman <mpe@...erman.id.au>
To: Masahiro Yamada <yamada.masahiro@...ionext.com>, Arnd Bergmann <arnd@...db.de>
Cc: Rich Felker <dalias@...c.org>, Kernel Hardening
<kernel-hardening@...ts.openwall.com>, X86 ML <x86@...nel.org>, Paul
Mackerras <paulus@...ba.org>, "H. Peter Anvin" <hpa@...or.com>, sparclinux
<sparclinux@...r.kernel.org>, Sam Ravnborg <sam@...nborg.org>, Yoshinori
Sato <ysato@...rs.sourceforge.jp>, Jonathan Corbet <corbet@....net>,
Richard Weinberger <richard@....at>, Linux-sh list
<linux-sh@...r.kernel.org>, Linus Torvalds
<torvalds@...ux-foundation.org>, Ingo Molnar <mingo@...hat.com>, Emese
Revfy <re.emese@...il.com>, Kees Cook <keescook@...omium.org>, uml-devel
<user-mode-linux-devel@...ts.sourceforge.net>, Linux Kbuild mailing list
<linux-kbuild@...r.kernel.org>, Peter Oberparleiter
<oberpar@...ux.vnet.ibm.com>, Jeff Dike <jdike@...toit.com>,
user-mode-linux-user@...ts.sourceforge.net, Thomas Gleixner
<tglx@...utronix.de>, Michal Marek <michal.lkml@...kovi.net>, Ulf
Magnusson <ulfalizer@...il.com>, Greg Kroah-Hartman
<gregkh@...uxfoundation.org>, Randy Dunlap <rdunlap@...radead.org>, "open
list\:DOCUMENTATION" <linux-doc@...r.kernel.org>, Linux Kernel Mailing List
<linux-kernel@...r.kernel.org>, linuxppc-dev
<linuxppc-dev@...ts.ozlabs.org>, "David S. Miller" <davem@...emloft.net>
Subject: Re: [PATCH 00/23] kconfig: move compiler capability tests to Kconfig
Masahiro Yamada <yamada.masahiro@...ionext.com> writes:
>
<snip>
>
> (Case 3)
> Compiler flag -foo is sensitive to endian-ness.
>
>
> config CC_NEEDS_BIG_ENDIAN
> def_bool $(cc-option -mbig-endian) && CPU_BIG_ENDIAN
>
> config CC_NEEDS_LITTLE_ENDIAN
> def_bool $(cc-option -mlittle-endian) && CPU_LITTLE_ENDIAN
>
> config CC_HAS_FOO
> bool
> default $(cc-option -mbig-endian -foo) if CC_NEEDS_BIG_ENDIAN
> default $(cc-option -mlittle-endian -foo) if CC_NEEDS_LITTLE_ENDIAN
> default $(cc-option -foo)
We may do something like this on powerpc, where we have 32/64-bit and
big/little endian (on 64-bit) and then some ABI options that we
set/unset depending on endian.
The above looks like it could work though.
cheers
Powered by blists - more mailing lists
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
