Subject: bug#53256: [bug-diffutils] bug#53256: Compiling 3.8 with nvhpc 22.1 : malloca.c 64 bits operations with signed and unsigned operands are currently unsupported by __builtin_add_overflow

From: Paul Eggert <[email-masked]>
Date: Sat, 15 Jan 2022 13:03:07 -0800

On 1/15/22 02:00, Olivier Cessenat wrote:
> Could you make sure it works for 3.8 ?

Backporting would be some work and I've got other things on my plate.

Can you compile with gcc instead? That would be easiest.

If you can't use gcc for some reason (what is it?), then you can try 
building from git, like this:

git clone https://git.savannah.gnu.org/git/diffutils.git
cd diffutils
./bootstrap
./configure CC=nvc
make WERROR_CFLAGS= check

Ignore all the bogus warnings that nvc generates.

For this latter approach you will need developer tools; see 
README-hacking and README-prereq.