unable to compile for RPI4 aarch64 kernel 5.15

[nightmarepuma]

I am new to this but I am trying to follow the readme instructions to compile manually for my RPI4 5.15.84-v8+, but I am getting the following error: BUILDING DRIVER for kernel 5.15 brcmfmac_5.15.y-nexmon/brcmfmac.ko (details: log/driver.log) ERROR: modpost: "dmi_first_match" [/opt/nexmon/patches/driver/brcmfmac_5.15.y-nexmon/brcmfmac.ko] undefined! ERROR: modpost: "_raw_spin_unlock" [/opt/nexmon/patches/driver/brcmfmac_5.15.y-nexmon/brcmfmac.ko] undefined! ERROR: modpost: "__warn_printk" [/opt/nexmon/patches/driver/brcmfmac_5.15.y-nexmon/brcmfmac.ko] undefined! ERROR: modpost: "__const_udelay" [/opt/nexmon/patches/driver/brcmfmac_5.15.y-nexmon/brcmfmac.ko] undefined! ERROR: modpost: "efivar_entry_size" [/opt/nexmon/patches/driver/brcmfmac_5.15.y-nexmon/brcmfmac.ko] undefined! ERROR: modpost: "efivar_entry_get" [/opt/nexmon/patches/driver/brcmfmac_5.15.y-nexmon/brcmfmac.ko] undefined! ERROR: modpost: "cpu_hwcap_keys" [/opt/nexmon/patches/driver/brcmfmac_5.15.y-nexmon/brcmfmac.ko] undefined! ERROR: modpost: "arm64_const_caps_ready" [/opt/nexmon/patches/driver/brcmfmac_5.15.y-nexmon/brcmfmac.ko] undefined! ERROR: modpost: "dmi_get_system_info" [/opt/nexmon/patches/driver/brcmfmac_5.15.y-nexmon/brcmfmac.ko] undefined! make[2]: *** [scripts/Makefile.modpost:133: /opt/nexmon/patches/driver/brcmfmac_5.15.y-nexmon/Module.symvers] Error 1 make[2]: *** Deleting file '/opt/nexmon/patches/driver/brcmfmac_5.15.y-nexmon/Module.symvers' make[1]: *** [Makefile:1817: modules] Error 2 make: *** [Makefile:54: brcmfmac.ko] Error 2

I have tried compiling for different firmware versions and got the same error. Do you have any idea how could this be fixed?

uname -rm 5.15.84-v8+ aarch64`

[nightmarepuma]

@DrSchottky do you know how to solve this problem? Here are the commands I ran: sudo su apt-get update sudo apt install raspberrypi-kernel-headers git libgmp3-dev gawk qpdf bison flex make autoconf libtool texinfo wget https://raw.githubusercontent.com/RPi-Distro/rpi-source/master/rpi-source -O /usr/local/bin/rpi-source && chmod +x /usr/local/bin/rpi-source && /usr/local/bin/rpi-source -q --tag-update rpi-source git clone https://github.com/seemoo-lab/nexmon.git cd nexmon sudo dpkg --add-architecture armhf sudo apt-get update sudo apt-get install libc6:armhf libisl23:armhf libmpfr6:armhf libmpc3:armhf libstdc++6:armhf sudo ln -s /usr/lib/arm-linux-gnueabihf/libisl.so.23.0.0 /usr/lib/arm-linux-gnueabihf/libisl.so.10 sudo ln -s /usr/lib/arm-linux-gnueabihf/libmpfr.so.6.1.0 /usr/lib/arm-linux-gnueabihf/libmpfr.so.4 source setup_env.sh make cd patches/bcm43455c0/7_45_189/nexmon/ make

From that last make, I get the error above.

[DrSchottky]

Can you try installing raspberrypi-kernel-headers before running apt update to get headers matching your kernel? Or you can grab them from here http://archive.raspberrypi.org/debian/pool/main/r/raspberrypi-firmware/

[nightmarepuma]

The manual download worked for me. Thank you so much