Le 03/08/2023 à 16:54, Andrew Stubbs a écrit :
> On 18/07/2023 08:24, Sisak, Janos Mihaly via Gcc-help wrote:
>> Good day everyone!
>>
>> I’ve been trying to compile GCC 13.1 with nvptx offloading but I’m 
>> having no success.
>> The host machine is an Ubuntu 20.04.6 LTS, with GCC 11.1 from the 
>> repositories.
>>
>> I compile and install binutils, nvptx-tools then I try to configure 
>> and buil gcc with target=nvptx-none. It fails during libatomic or 
>> libbacktrace with this error:
>> configure:3721: /home/uig13265/offload/wrk/build-gcc-nvptx/./gcc/xgcc 
>> -B/home/uig13265/offload/wrk/build-gcc-nvptx/./gcc/ 
>> -B/home/uig13265/offload/install/nvptx-none/bin/ 
>> -B/home/uig13265/offload/install/nvptx-none/lib/ -isystem 
>> /home/uig13265/offload/install/nvptx-none/include -isystem 
>> /home/uig13265/offload/install/nvptx-none/sys-include    -V >&5
>> xgcc: error: unrecognized command-line option '-V'
>> xgcc: fatal error: no input files
>> compilation terminated.
>>
>> I tried to google the error and I found that maybe my newlib is 
>> wrong. I tried both the mentorgraphics repo (marked obsolete) and the 
>> Cygwin repo (release cygwin-3.4.7). No success.
>>
>> I attached the failing log, the script used for downloading the repos 
>> and the script used for compiling the sources. If you have five 
>> minutes and can help, please do, would be very much appreciated.
>
> Are you following the instructions at 
> https://gcc.gnu.org/wiki/Offloading#How_to_build_an_offloading-enabled_GCC 
> ?
>
> The "Cygwin" Newlib is the correct one, but the configuration needs to 
> be right, and the newlib soft-link needs to be in place when you build 
> the compiler.
>
> Andrew


Hi Sisak

I have the attached script that allow me to build GCC from the git repo. 
It works for a while for me on AMD cpu + Nvidia GPU architecture. I have 
reported what I think to be a bug in the compiler many weeks ago 
(https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109699, still with 
unconfirmed status in the bug list) and I often check my small test-case 
code with latest GCC version to see if some improvements allow its 
resolution. So all should run "automagically" for building the compilers 
every week....

Look at lines 8, 9 and 11 for your local setup and lines 35 and 36 to 
select the release you need.

I'm using RHEL familly OS but it should run on Ubuntu I think.

Of course if something is wrong and you improve the script, publish your 
new version in this thread !

Patrick