Hi Tobias,
Linking with*/gfortran -fuse-ld=mold..../* works fine for me too.
I have mold 2.40.4 (provided by Almalinux 8) and gfortran 15.2.0 (built
from the Git repository) and I'm using OpenMP for offloading.
Thank you
Patrick
Le 27/10/2025 à 15:48, Tobias Burnus a écrit :
Hi Patrick & Salvatore, hi all,
Patrick Begou wrote:
I met this problem many times on a really large application.
Can you (plural) try the following workaround? -fuse-ld=mold ? [1]
If it works, please report back. (It seems to handle the reduced
testcase.)
* * *
For Salvatore's original issue: He provided me with a large testcase,
which took a while to reduce. [2]
→ https://gcc.gnu.org/PR122432
Tobias
[1] 'mold' is an alternative linker; you need a newer version than end
of Feb 2024; distros also package this linker; should be enough to be
in the $PATH
[2] I used
https://gcc.gnu.org/wiki/A_guide_to_testcase_reduction#Legacy_reduction_tools,
including to reduce the number of .o files in the linked-in archive.
The testscript not only build it, but also run it checking for the
expected run-time error. A large library, polymorphic types and a
complex hierarchy didn't speed it up, but at the end it was MPI's use
of common symbols that caused the issue for some reasons.
