From: Richard Earnshaw <Richard.Earnshaw@foss.arm.com>
To: Szabolcs Nagy <szabolcs.nagy@arm.com>,
"gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>
Cc: Marcus Shawcroft <Marcus.Shawcroft@arm.com>
Subject: Re: [PATCH][AArch64] Documentation fix for -fpic
Date: Mon, 23 Nov 2015 15:17:00 -0000 [thread overview]
Message-ID: <56532CEE.4050005@foss.arm.com> (raw)
In-Reply-To: <56447860.6080702@arm.com>
On 12/11/15 11:30, Szabolcs Nagy wrote:
> The documentation for -fpic and -fPIC explicitly mentions some targets
> where the difference matters, but not AArch64. Specifying the GOT size
> limit is not entirely correct as it can depend on the -mcmodel setting,
> but probably better than leaving the impression that -fpic vs -fPIC does
> not matter on AArch64.
>
> ChangeLog:
>
> 2015-11-12 Szabolcs Nagy <szabolcs.nagy@arm.com>
>
> * doc/invoke.texi (-fpic): Add the AArch64 limit.
> (-fPIC): Add AArch64.
>
> fpic.diff
>
>
> diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
> index 0121832..f925fe0 100644
> --- a/gcc/doc/invoke.texi
> +++ b/gcc/doc/invoke.texi
> @@ -23951,7 +23951,7 @@ loader is not part of GCC; it is part of the operating system). If
> the GOT size for the linked executable exceeds a machine-specific
> maximum size, you get an error message from the linker indicating that
> @option{-fpic} does not work; in that case, recompile with @option{-fPIC}
> -instead. (These maximums are 8k on the SPARC and 32k
> +instead. (These maximums are 8k on the SPARC, 28k on AArch64 and 32k
> on the m68k and RS/6000. The x86 has no such limit.)
>
> Position-independent code requires special support, and therefore works
> @@ -23966,7 +23966,7 @@ are defined to 1.
> @opindex fPIC
> If supported for the target machine, emit position-independent code,
> suitable for dynamic linking and avoiding any limit on the size of the
> -global offset table. This option makes a difference on the m68k,
> +global offset table. This option makes a difference on the AArch64, m68k,
^^^
The use of the definite article here makes this read somewhat awkwardly
(particularly as AArch64 is first and is a term for a set of processor
implementations). I think it would read better if it were dropped:
"This option makes a difference on AArch64, m68k,..."
> PowerPC and SPARC@.
>
> Position-independent code requires special support, and therefore works
>
OK with that change if nobody else objects within 24 hours.
R.
prev parent reply other threads:[~2015-11-23 15:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-12 11:30 Szabolcs Nagy
2015-11-23 14:56 ` Szabolcs Nagy
2015-11-23 15:17 ` Richard Earnshaw [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=56532CEE.4050005@foss.arm.com \
--to=richard.earnshaw@foss.arm.com \
--cc=Marcus.Shawcroft@arm.com \
--cc=gcc-patches@gcc.gnu.org \
--cc=szabolcs.nagy@arm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).