Cannot build Wireguard for ARM embedded Linux 32-bit Tinkerboard

Cannot build Wireguard for ARM embedded Linux 32-bit Tinkerboard

[Nicholas Kinar]

Hello,

I've attempted to build Wireguard on an Asus Tinkerboard S running 
embedded Linux.  The board was initially flashed with Tinker OS (Debian 
Stretch), but I updated to the more recent version of Debian buster 
using apt-get.  This is a 32-bit processor.

Operating System: Debian GNU/Linux 10 (buster)
Kernel: Linux 4.4.132+

linaro@clavet-server:~$ uname -a
Linux clavet-server 4.4.132+ #1 SMP Wed Aug 21 19:15:55 CST 2019 armv7l 
GNU/Linux

I've followed the installation and build instructions on the official 
website.  The kernel model does not install nor build due to a compiler 
flag that is not supported.  Apparently this flag is for a 64-bit 
build.  I've also tried to do installation using the git version and the 
same build failure occurs.  Here is the output of the make.log.

DKMS make.log for wireguard-0.0.20191219 for kernel 4.4.132+ (armv7l)
Tue Jan  7 22:24:08 UTC 2020
make: Entering directory '/usr/src/linux-headers-4.4.132+'
   LD      /var/lib/dkms/wireguard/0.0.20191219/build/built-in.o
   CC [M]  /var/lib/dkms/wireguard/0.0.20191219/build/main.o
   CC [M]  /var/lib/dkms/wireguard/0.0.20191219/build/noise.o
   CC [M]  /var/lib/dkms/wireguard/0.0.20191219/build/device.o
   CC [M]  /var/lib/dkms/wireguard/0.0.20191219/build/peer.o
gcc: error: unrecognized command line option ‘-mgeneral-regs-only’
gcc: error: unrecognized command line option ‘-mgeneral-regs-only’
gcc: error: unrecognized command line option ‘-mgeneral-regs-only’
make[1]: *** [scripts/Makefile.build:277: 
/var/lib/dkms/wireguard/0.0.20191219/build/main.o] Error 1
make[1]: *** Waiting for unfinished jobs....
gcc: error: unrecognized command line option ‘-mgeneral-regs-only’
make[1]: *** [scripts/Makefile.build:277: 
/var/lib/dkms/wireguard/0.0.20191219/build/noise.o] Error 1
make[1]: *** [scripts/Makefile.build:277: 
/var/lib/dkms/wireguard/0.0.20191219/build/device.o] Error 1
make[1]: *** [scripts/Makefile.build:277: 
/var/lib/dkms/wireguard/0.0.20191219/build/peer.o] Error 1
make: *** [Makefile:1471: 
_module_/var/lib/dkms/wireguard/0.0.20191219/build] Error 2
make: Leaving directory '/usr/src/linux-headers-4.4.132+'

What do I have to do to compile Wireguard on this system?  I've tried to 
add various libraries (as per 
https://devtalk.nvidia.com/default/topic/906942/jetson-tx1/failed-to-compile-kernel-module-gcc-cannot-recognize-aarch64-option-mgeneral-regs-only-/), 
but the same problem occurs.

Wireguard works great on all of my 64-bit servers and it is being used 
to create research networks.  Thanks so much for creating this great tool.

Nicholas

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

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Re: Cannot build Wireguard for ARM embedded Linux 32-bit Tinkerboard

[Ilie Halip]

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.
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Re: Cannot build Wireguard for ARM embedded Linux 32-bit Tinkerboard

[Nicholas Kinar]

On 1/9/2020 2:17 AM, Ilie Halip wrote:
> CAUTION: This email originated from outside of the University of Saskatchewan. Do not click links or open attachments unless you recognize the sender and know the content is safe. If in doubt, please forward suspicious emails to phishing@usask.ca
>
>
> 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@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@usask.ca
http://www.usask.ca/hydrology

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