Cannot build Wireguard for ARM embedded Linux 32-bit Tinkerboard

[Nicholas Kinar]

On 1/9/2020 2:17 AM, Ilie Halip wrote:
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>
> You could just cd into /var/lib/dkms/wireguard/0.0.20191219 and run
> "make V=1" manually in there as root. That should give more information.
>
> I.H.

Hello Ilie:

Thanks for your help, I did this and it showed that the compiler doesn't 
recognize a command-line option ( ‘-mgeneral-regs-only’). The output is 
pasted below.

linaro at clavet-server:/var/lib/dkms/wireguard/0.0.20191219/build$ sudo 
make V=1
ver="#define WIREGUARD_VERSION \"\"" && \
[ "$(cat version.h 2>/dev/null)" != "$ver" ] && \
echo "$ver" > version.h || true
make[1]: Entering directory '/usr/src/linux-headers-4.4.132+'
test -e include/generated/autoconf.h -a -e include/config/auto.conf || 
(                \
echo >&2; \
echo >&2 "  ERROR: Kernel configuration is invalid.";           \
echo >&2 "         include/generated/autoconf.h or 
include/config/auto.conf are missing.";\
echo >&2 "         Run 'make oldconfig && make prepare' on kernel src to 
fix it.";      \
echo >&2 ;                                                      \
/bin/false)
mkdir -p /var/lib/dkms/wireguard/0.0.20191219/build/.tmp_versions ; rm 
-f /var/lib/dkms/wireguard/0.0.20191219/build/.tmp_versions/*
make -f ./scripts/Makefile.build 
obj=/var/lib/dkms/wireguard/0.0.20191219/build
   ./scripts/gcc-wrapper.py gcc 
-Wp,-MD,/var/lib/dkms/wireguard/0.0.20191219/build/.main.o.d -nostdinc 
-isystem /usr/lib/gcc/arm-linux-gnueabihf/8/include 
-I./arch/arm64/include -Iarch/arm64/include/generated/uapi 
-Iarch/arm64/include/generated  -Iinclude -I./arch/arm64/include/uapi 
-Iarch/arm64/include/generated/uapi -I./include/uapi 
-Iinclude/generated/uapi -include ./include/linux/kconfig.h -D__KERNEL__ 
-mlittle-endian -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs 
-fno-strict-aliasing -fno-common -Werror-implicit-function-declaration 
-Wno-format-security -std=gnu89 -fno-PIE -mgeneral-regs-only -fno-pic 
-fno-asynchronous-unwind-tables -Os -fno-omit-frame-pointer 
-fno-optimize-sibling-calls -g -pg -O3 -fvisibility=hidden 
-D'pr_fmt(fmt)=KBUILD_MODNAME ": " fmt' -Wframe-larger-than=2048 
-I/var/lib/dkms/wireguard/0.0.20191219/build/crypto/include 
-DCONFIG_ZINC_ARCH_ARM -include 
/var/lib/dkms/wireguard/0.0.20191219/build/compat/compat.h 
-I/var/lib/dkms/wireguard/0.0.20191219/build/compat/ptr_ring/include 
-I/var/lib/dkms/wireguard/0.0.20191219/build/compat/siphash/include 
-I/var/lib/dkms/wireguard/0.0.20191219/build/compat/simd-asm/include 
-I/var/lib/dkms/wireguard/0.0.20191219/build/compat/simd/include 
-DCOMPAT_CANNOT_USE_DEV_CNF  -DMODULE  -DKBUILD_BASENAME='"main"' 
-DKBUILD_MODNAME='"wireguard"' -c -o 
/var/lib/dkms/wireguard/0.0.20191219/build/main.o 
/var/lib/dkms/wireguard/0.0.20191219/build/main.c
gcc: error: unrecognized command line option ‘-mgeneral-regs-only’
make[2]: *** [scripts/Makefile.build:278: 
/var/lib/dkms/wireguard/0.0.20191219/build/main.o] Error 1
make[1]: *** [Makefile:1471: 
_module_/var/lib/dkms/wireguard/0.0.20191219/build] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-4.4.132+'
make: *** [Makefile:33: module] Error 2

-- 
Dr. Nicholas J. Kinar, PhD
Research Scientist | Global Water Futures
Assistant Director | Smart Water Systems Lab
University of Saskatchewan
306-966-2092 | n.kinar at usask.ca
http://www.usask.ca/hydrology