ld -plugin option

ld -plugin option

[Yuanfang Chen]

Hello,

Maybe this is a silly question, however, it annoys me today for too
long.  I'm using ld 2.24, which shows that it supports '-plugin'
option by 'ld --help |grep plugin', however 'ld -plugin' returns
"unrecognized option '-plugin'".  I really don't know where the
problem is.  Another question is that  is the plugin interface
supported by ld and ld.gold the same?

thank you so much,
cyf

[arch@t431s-arch gcc-4.6.4]$ gcc4.6 -###
Using built-in specs.
COLLECT_GCC=gcc4.6
COLLECT_LTO_WRAPPER=/home/arch/Install/gcc-4.6.4/libexec/gcc/x86_64-unknown-linux-gnu/4.6.4/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.6.4/configure
--enable-languages=c,c++,fortran --enable-multiarch --enable-shared
--enable-threads=posix --program-suffix=4.6 --with-gmp=/usr/local/lib
--with-mpc=/usr/lib --with-mpfr=/usr/lib --without-included-gettext
--with-system-zlib --with-tune=generic
--prefix=/home/arch/Install/gcc-4.6.4 --disable-multilib --enable-lto
--enable-gold --enable-ld=default --enable-plugin
--with-plugin-ld=ld.gold
Thread model: posix
gcc version 4.6.4 (GCC)

[arch@t431s-arch gcc-4.6.4]$ ld -v
GNU ld (GNU Binutils) 2.24

[arch@t431s-arch gcc-4.6.4]$ ld -plugin
ld: unrecognized option '-plugin'
ld: use the --help option for usage information

Re: ld -plugin option

[Andrew Pinski]

On Wed, Feb 5, 2014 at 4:07 PM, Yuanfang Chen <cyfmxc@gmail.com> wrote:
> Hello,
>
> Maybe this is a silly question, however, it annoys me today for too
> long.  I'm using ld 2.24, which shows that it supports '-plugin'
> option by 'ld --help |grep plugin', however 'ld -plugin' returns
> "unrecognized option '-plugin'".  I really don't know where the
> problem is.  Another question is that  is the plugin interface
> supported by ld and ld.gold the same?

Yes the interfaces is the same.  The issue you are having is -plugin
takes an argument and you are not supplying an option to the -plugin
option.

Thanks,
Andrew Pinski

>
> thank you so much,
> cyf
>
> [arch@t431s-arch gcc-4.6.4]$ gcc4.6 -###
> Using built-in specs.
> COLLECT_GCC=gcc4.6
> COLLECT_LTO_WRAPPER=/home/arch/Install/gcc-4.6.4/libexec/gcc/x86_64-unknown-linux-gnu/4.6.4/lto-wrapper
> Target: x86_64-unknown-linux-gnu
> Configured with: ../gcc-4.6.4/configure
> --enable-languages=c,c++,fortran --enable-multiarch --enable-shared
> --enable-threads=posix --program-suffix=4.6 --with-gmp=/usr/local/lib
> --with-mpc=/usr/lib --with-mpfr=/usr/lib --without-included-gettext
> --with-system-zlib --with-tune=generic
> --prefix=/home/arch/Install/gcc-4.6.4 --disable-multilib --enable-lto
> --enable-gold --enable-ld=default --enable-plugin
> --with-plugin-ld=ld.gold
> Thread model: posix
> gcc version 4.6.4 (GCC)
>
> [arch@t431s-arch gcc-4.6.4]$ ld -v
> GNU ld (GNU Binutils) 2.24
>
> [arch@t431s-arch gcc-4.6.4]$ ld -plugin
> ld: unrecognized option '-plugin'
> ld: use the --help option for usage information

Re: ld -plugin option

[Yuanfang Chen]

On Wed, Feb 5, 2014 at 7:17 PM, Andrew Pinski <pinskia@gmail.com> wrote:
> On Wed, Feb 5, 2014 at 4:07 PM, Yuanfang Chen <cyfmxc@gmail.com> wrote:
>> Hello,
>>
>> Maybe this is a silly question, however, it annoys me today for too
>> long.  I'm using ld 2.24, which shows that it supports '-plugin'
>> option by 'ld --help |grep plugin', however 'ld -plugin' returns
>> "unrecognized option '-plugin'".  I really don't know where the
>> problem is.  Another question is that  is the plugin interface
>> supported by ld and ld.gold the same?
>
> Yes the interfaces is the same.  The issue you are having is -plugin
> takes an argument and you are not supplying an option to the -plugin
> option.
>
> Thanks,
> Andrew Pinski

Well, that's really confusing, I was expecting something like 'missing
arguments' like the ld.gold does.  :-)

I'am asking this because when I'm doing this:  (all are non binary object)
ld.gold -plugin=/path/to/plugin  a.o b.o c.o
everything goes fine.

but
ld -plugin=/path/to/plugin  a.o b.o c.o
complains  b.o: file not recognized: File format not recognized

If the plugin interface is the same, there should not be any problem, right?

btw, I'm using the LLVM gold plugin, which implements the gold interface.


Thank you,
cyf

Re: ld -plugin option

[H.J. Lu]

On Wed, Feb 5, 2014 at 4:33 PM, Yuanfang Chen <cyfmxc@gmail.com> wrote:
> On Wed, Feb 5, 2014 at 7:17 PM, Andrew Pinski <pinskia@gmail.com> wrote:
>> On Wed, Feb 5, 2014 at 4:07 PM, Yuanfang Chen <cyfmxc@gmail.com> wrote:
>>> Hello,
>>>
>>> Maybe this is a silly question, however, it annoys me today for too
>>> long.  I'm using ld 2.24, which shows that it supports '-plugin'
>>> option by 'ld --help |grep plugin', however 'ld -plugin' returns
>>> "unrecognized option '-plugin'".  I really don't know where the
>>> problem is.  Another question is that  is the plugin interface
>>> supported by ld and ld.gold the same?
>>
>> Yes the interfaces is the same.  The issue you are having is -plugin
>> takes an argument and you are not supplying an option to the -plugin
>> option.
>>
>> Thanks,
>> Andrew Pinski
>
> Well, that's really confusing, I was expecting something like 'missing
> arguments' like the ld.gold does.  :-)
>
> I'am asking this because when I'm doing this:  (all are non binary object)
> ld.gold -plugin=/path/to/plugin  a.o b.o c.o
> everything goes fine.
>
> but
> ld -plugin=/path/to/plugin  a.o b.o c.o
> complains  b.o: file not recognized: File format not recognized
>

How did you configure binutils?  Did you use --enable-plugins?

-- 
H.J.

Re: ld -plugin option

[Yuanfang Chen]

---------- Forwarded message ----------
From: Yuanfang Chen <cyfmxc@gmail.com>
Date: Wed, Feb 5, 2014 at 9:26 PM
Subject: Re: ld -plugin option
To: "H.J. Lu" <hjl.tools@gmail.com>


>
> How did you configure binutils?  Did you use --enable-plugins?
>
> --
> H.J.


I believe so.

[fedora18@t1600-f18 ~]$ ld -v

GNU ld version 2.23.51.0.1-10.fc18 20120806

http://kojipkgs.fedoraproject.org//packages/binutils/2.23.51.0.1/10.fc18/data/logs/x86_64/build.log