Hardware floating point build error ARMv8

[sophieforceno]

I have an ARMv8 device (Libre La Frite) I'm trying to build this on and I'm getting the hardware floating point error.

unrecognized command line option ‘-mfloat-abi=hard’

I don't think the suggestions in the Readme are applicable here (the option that sed is supposed to remove doesn't exist in the Makefile for arm64 in /lib/modules/$(uname -r)/arch/. My understanding is that ARMv8 supports hardware floating point, but I'll admit I don't know much about this.

I have CONFIG_PLATFORM_ARM64_RPI = y, but is that right? Is there some additional changes needed in the Makefile?

uname -ir:

4.19.57+ aarch64

Build error:

make ARCH=arm64 CROSS_COMPILE= -C /lib/modules/4.19.57+/build M=/home/andy/rtl8821CU-master modules make[1]: Entering directory '/usr/src/linux-headers-4.19.57+' CC [M] /home/andy/rtl8821CU-master/core/rtw_cmd.o gcc: error: unrecognized command line option ‘-mfloat-abi=hard’ scripts/Makefile.build:303: recipe for target '/home/andy/rtl8821CU-master/core/rtw_cmd.o' failed make[2]: [/home/andy/rtl8821CU-master/core/rtw_cmd.o] Error 1 Makefile:1517: recipe for target 'module/home/andy/rtl8821CU-master' failed make[1]: [module/home/andy/rtl8821CU-master] Error 2 make[1]: Leaving directory '/usr/src/linux-headers-4.19.57+' Makefile:2213: recipe for target 'modules' failed make: *** [modules] Error 2

[smp79]

Set CONFIG_MP_VHT_HW_TX_MODE = n

[sophieforceno]

Still can't build it, but that fixed the -mfloat-abi=hard error so I will close.