On 09/10/2018 11:00, wireguard-request@lists.zx2c4.com wrote:
> In fact :
>
> [nicolas@linux wireguard-go-0.0.20180613]$ printf 'package main\nconst
> UseTheKernelModuleInstead = 0xdeadbabe\n' > ireallywantobuildon_linux.go
> [nicolas@linux wireguard-go-0.0.20180613]$ make
> Makefile:7: *** Do not build this for Linux. Instead use the Linux kernel
> module. See wireguard.com/install/ for more info..  Stop.

Look in the Makefile 
<https://github.com/WireGuard/wireguard-go/blob/master/Makefile>:

ifeq ($(shell go env GOOS),linux)
ifeq ($(wildcard .git),)
$(error Do not build this for Linux. Instead use the Linux kernel 
module. See wireguard.com/install/ for more info.)
else
$(shell printf 'package main\nconst UseTheKernelModuleInstead = 
0xdeadbabe\n' > ireallywantobuildon_linux.go)
endif
endif

Also see 
https://www.gnu.org/software/make/manual/html_node/Wildcard-Function.html

It looks like you need to move the .git directory out of the way before 
you build - or just modify the Makefile. And you shouldn't need to 
manually create ireallywantobuildon_linux.go, because the Makefile does 
it for you.