Onload installation error

[manu.rhel]

Hi Experts, I am trying to install onload-9.0.1 on my Gentoo server and its failing with the below error -

/sw/onload-9.0.1.86/scripts # ./onload_install
onload_install: Building Onload.
Build tree made for linux as x86_64_linux-5.15.173-gentoo
make: Entering directory '/sw/onload-9.0.1.86/build/x86_64_linux-5.15.173-gentoo'
make -C ../.. KPATH=/usr/src/linux-5.15.173-gentoo KBUILDTOP=/sw/onload-9.0.1.86/build/x86_64_linux-5.15.173-gentoo kernel
make[1]: Entering directory '/sw/onload-9.0.1.86'
Makefile:171: *** empty variable name. Stop.
make[1]: Leaving directory '/sw/onload-9.0.1.86'
make: *** [GNUmakefile:2: all] Error 2
make: Leaving directory '/sw/onload-9.0.1.86/build/x86_64_linux-5.15.173-gentoo'
onload_build: ERROR: Failed to build driver components.
onload_install: ERROR: Build failed. Not installing.

# gcc-config -l
[1] x86_64-pc-linux-gnu-11.3.0 *
[2] x86_64-pc-linux-gnu-12

# uname -a
Linux 5.15.173-gentoo #2 SMP Wed Apr 23 18:02:10 IST 2025 x86_64 AMD Ryzen 9 9950X 16-Core Processor AuthenticAMD GNU/Linux

Need your expertise in getting this sorted.

Thanks in advance.

[fedeliallalinea]

Moved from Portage & Programming to Unsupported Software.