I would like to work with the seabios-hppa, but I can't seem to get it to build.  It fails with a compiler command line option -mdisable-fpregs

I am using GCC
Craig@Ubuntu-VM:~/KVM/HPUX/seabios-hppa$ gcc --version
gcc (Ubuntu 11.2.0-19ubuntu1) 11.2.0
Copyright (C) 2021 Free Software Foundation, Inc.

craig@Ubuntu-VM:~/KVM/HPUX$ git clone https://github.com/hdeller/seabios-hppa.git
Cloning into 'seabios-hppa'...
remote: Enumerating objects: 18038, done.
remote: Counting objects: 100% (1740/1740), done.
remote: Compressing objects: 100% (596/596), done.
remote: Total 18038 (delta 1178), reused 1695 (delta 1141), pack-reused 16298
Receiving objects: 100% (18038/18038), 4.17 MiB | 5.70 MiB/s, done.
Resolving deltas: 100% (14315/14315), done.

craig@Ubuntu-VM:~/KVM/HPUX$ cd seabios-hppa/

craig@Ubuntu-VM:~/KVM/HPUX/seabios-hppa$ make menuconfig
craig@Ubuntu-VM:~/KVM/HPUX/seabios-hppa$ make parisc
DIRS="" make -f Makefile.parisc all
  Build Kconfig config file
# configuration written to /home/craig/KVM/HPUX/seabios-hppa/.config
Version: seabios-hppa-v6-0-g458626c4-dirty-20221010_171647-Ubuntu-VM
  Compile checking out/head.o
cc: error: unrecognized command-line option '-mdisable-fpregs'
make[1]: *** [Makefile.parisc:148: out/head.o] Error 1
make: *** [Makefile:110: parisc] Error 2

If I remove the -mdisable-fpregs,  I get a LOT of errors.

What am I doing wrong?   QEMU-HPPA builds with no problems.

Any help is appreciated.