Missing <asm/neon.h> with 0.0.20180904 on arm with kernel 3.10.107

[Philipp Richter]

Hello,

while trying to install the new wireguard snapshot 0.0.20180904, I got an
error about missing <arm/neon.h> on my odroid-c1 running ArchLinux ARM

DKMS make.log for wireguard-0.0.20180904 for kernel 3.10.107-2-ARCH
(armv7l)
Thu Sep  6 22:45:48 CEST 2018
make: Entering directory '/usr/src/linux-3.10.107-2-ARCH'
 LD      /var/lib/dkms/wireguard/0.0.20180904/build/built-in.o
 CC [M]  /var/lib/dkms/wireguard/0.0.20180904/build/main.o
 CC [M]  /var/lib/dkms/wireguard/0.0.20180904/build/device.o
 CC [M]  /var/lib/dkms/wireguard/0.0.20180904/build/noise.o
 CC [M]  /var/lib/dkms/wireguard/0.0.20180904/build/peer.o
 CC [M]  /var/lib/dkms/wireguard/0.0.20180904/build/timers.o
 CC [M]  /var/lib/dkms/wireguard/0.0.20180904/build/queueing.o
 CC [M]  /var/lib/dkms/wireguard/0.0.20180904/build/send.o
 CC [M]  /var/lib/dkms/wireguard/0.0.20180904/build/receive.o
 CC [M]  /var/lib/dkms/wireguard/0.0.20180904/build/socket.o
 CC [M]  /var/lib/dkms/wireguard/0.0.20180904/build/hashtables.o
 CC [M]  /var/lib/dkms/wireguard/0.0.20180904/build/allowedips.o
 CC [M]  /var/lib/dkms/wireguard/0.0.20180904/build/ratelimiter.o
 CC [M]  /var/lib/dkms/wireguard/0.0.20180904/build/cookie.o
 CC [M]  /var/lib/dkms/wireguard/0.0.20180904/build/netlink.o
 CC [M]
 /var/lib/dkms/wireguard/0.0.20180904/build/crypto/zinc/chacha20/chacha20.o
 AS [M]
 /var/lib/dkms/wireguard/0.0.20180904/build/crypto/zinc/chacha20/chacha20-arm.o

 CC [M]
 /var/lib/dkms/wireguard/0.0.20180904/build/crypto/zinc/poly1305/poly1305.o
 AS [M]
 /var/lib/dkms/wireguard/0.0.20180904/build/crypto/zinc/poly1305/poly1305-arm.o

 CC [M]
 /var/lib/dkms/wireguard/0.0.20180904/build/crypto/zinc/chacha20poly1305.o
 CC [M]
 /var/lib/dkms/wireguard/0.0.20180904/build/crypto/zinc/curve25519/curve25519.o

In file included from <command-line>:
/var/lib/dkms/wireguard/0.0.20180904/build/crypto/zinc/chacha20/chacha20-arm-glue.h:8:10:
fatal error: asm/neon.h: No such file or directory
#include <asm/neon.h>
         ^~~~~~~~~~~~
compilation terminated.
make[1]: *** [scripts/Makefile.build:308:
/var/lib/dkms/wireguard/0.0.20180904/build/crypto/zinc/chacha20/chacha20.o]
Error 1
make[1]: *** Waiting for unfinished jobs....
In file included from <command-line>:
/var/lib/dkms/wireguard/0.0.20180904/build/crypto/zinc/poly1305/poly1305-arm-glue.h:8:10:
fatal error: asm/neon.h: No such file or directory
#include <asm/neon.h>
         ^~~~~~~~~~~~
compilation terminated.
make[1]: *** [scripts/Makefile.build:308:
/var/lib/dkms/wireguard/0.0.20180904/build/crypto/zinc/poly1305/poly1305.o]
Error 1
make: *** [Makefile:1233:
_module_/var/lib/dkms/wireguard/0.0.20180904/build] Error 2
make: Leaving directory '/usr/src/linux-3.10.107-2-ARCH'

Unfortunately I'm stuck with 3.10.107 on my odroid-c1 :'-( , sources can be
found here : https://github.com/hardkernel/linux/tree/odroidc-3.10.y

Wireguard has been working great so far, going back to 0.0.20180809 yields
a successful compilation.

Best Regards,
Philipp Richter

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