Re: Sponsor post prices

[abdullah rana via Gcc]

I'm waiting for your reply


On Tue, Dec 28, 2021 at 1:40 AM abdullah rana 
wrote:

>  hi
>
> What is your sponsor post price of this site:https://www.gnu.org/ If you
> have more websites then please let me know Thanks?
>
>

How to get started with contribution

[Prakhar Khandelwal via Gcc]

Hey !!
I, Prakhar Khandelwal, am currently in the 3rd year of my engineering and
majoring in Computer Science. I always wanted to work at a low level in
software. That's why  I want to contribute to your organization but
wondering from where should I start, as I am new to this world of
open-source. So, if you can guide me,  then it would be great.
Waiting for your precious response.!!
Regards.

Re: How to get started with contribution

[David Edelsohn via Gcc]

On Wed, Jan 5, 2022 at 3:27 PM Prakhar Khandelwal via Gcc
 wrote:
>
> Hey !!
> I, Prakhar Khandelwal, am currently in the 3rd year of my engineering and
> majoring in Computer Science. I always wanted to work at a low level in
> software. That's why  I want to contribute to your organization but
> wondering from where should I start, as I am new to this world of
> open-source. So, if you can guide me,  then it would be great.
> Waiting for your precious response.!!
> Regards.

Thanks for your interest in GCC.  Welcome!

A good place to start is the GCC Wiki Getting Started page:
https://gcc.gnu.org/wiki/#Getting_Started_with_GCC_Development

and browse other recent answers to similar questions in the archives
of this mailing list.

Thanks, David

Re: [power-iee128] How to specify linker flags

[Michael Meissner via Gcc]

On Sun, Jan 02, 2022 at 11:58:29PM +0100, Thomas Koenig wrote:
> Hi Michael,
> 
> > If you are building libraries that contain modules with multiple long double
> > types, you must use the '-mno-gnu-attribute'.  We also use the '-Wno-psabi'
> > option, which silences the warning that you are switching long double types 
> > (if
> > glibc is not 2.34 or newer).  We may need to tweak -Wno-psabi for use with
> > Fortran.
> 
> I am now at the point where the object files are also compiled correctly
> for the gfortran specifics:
> 
>  <_gfortran_specific__abs_r17>:
>0:   09 00 43 f4 lxv vs34,0(r3)
>4:   48 16 40 fc xsabsqp v2,v2
>8:   20 00 80 4e blr
> 
> However, the linker complains, as you said it would, about the different
> formats:
> 
> /opt/at15.0/bin/ld: .libs/maxloc0_4_r16.o uses IBM long double,
> .libs/_abs_r17.o uses IEEE long double
> /opt/at15.0/bin/ld: failed to merge target specific data of file
> .libs/_abs_r17.o
> 
> I know next to nothing about libtool, so I do not know how to
> add the flags so the linker can find them.
> 
> Any pointers?
> 
> (I have not yet committed the changes because I do not want to
> commit something that does not compile.  If anybody wants to
> take a look, it's on the ieee128 virtual machine under
> /home/tkoenig/ieee ).

I'm just getting back into things after being off-line for the winter holidays.
As others have said, you need to use the GCC option -mno-gnu-attributes on any
module that handles one of the long double types if you are building libraries
that can handle both.

Note, for C/C++ languages, you should add -Wno-psabi to the options as well as
-mabi={ieee,ibm}longdouble.  This suppresses the warning that says you are
changing the long double type.  If you have configred GCC against GLIBC 2.32 or
newer, then you don't need the -Wno-psabi option.  Unfortunately, you can't use
-Wno-psabi on languages like Fortran.

-- 
Michael Meissner, IBM
PO Box 98, Ayer, Massachusetts, USA, 01432
email: meiss...@linux.ibm.com