cannot cross-compile arm binary on x86 platform

[zync-mzy]

$ GOARCH=arm GOOS=linux make BUILDTAGS="" EXTRA_LDFLAGS="-extldflags '-static'" 
go build -buildmode=pie  -ldflags "-X main.gitCommit="1f11dc5dba5213400482cd974db20ee1408d2c7f" -X main.version=1.0.0-rc5+dev -extldflags '-static'" -tags "" -o runc .
go build github.com/opencontainers/runc/libcontainer/nsenter: no buildable Go source files in /home/zync/Code/go/src/github.com/opencontainers/runc/libcontainer/nsenter
Makefile:32: recipe for target 'runc' failed
make: *** [runc] Error 1

Could any body tell me how to make it? Any suggestions would be appreciated!

[bzub]

Cross compiling with cgo in the mix (nsenter package) is a bit more involved. See golang/go#24433

Hopefully the cgo bits will be turned into pure Go at one point, though: #1795

[bzub]

You will need to set up a cross compile toolchain, I'm not knowledgeable enough to recommend precise steps. I can tell you with confidence that you at least need to specify CGO_ENABLED=1 since the go tool tries to disable cgo when cross compiling, which is why you get that particular error message.

[zync-mzy]

@bzub Thanks a lot for your reply! Since I know what the problem is now, I will try again to figure it out.

[bzub]

I got it working without being completely statically linked. Add CC=arm-linux-gnueabihf-gcc or whatever cross compiler you can install for your system. Also add build_static to the BUILDTAGS= which disables systemd support.

For example on Arch Linux compiling for arm64 (raspberry pi 3) I was successful with installing the aarch64-linux-gnu-gcc package and using CC=aarch64-linux-gnu-gcc

Now getting it to work with seccomp is what I haven't accomplished. There's actually a make target for static building to reference. I have gotten this far:

$ make static GOARCH="arm64" CGO_ENABLED=1 CC="aarch64-linux-gnu-gcc" CGO_CFLAGS="-I/usr/aarch64-linux-gnu/include/linux -g -O2"
CGO_ENABLED=1 go build  -tags "seccomp netgo osusergo static_build" -installsuffix netgo -ldflags "-w -extldflags -static -X main.gitCommit="4932620b62
37ed2a91aa5b5ca8cca6a73c10311b" -X main.version=1.0.0-rc6+dev " -o runc .
# runtime/cgo
In file included from _cgo_export.c:3:
/usr/aarch64-linux-gnu/usr/include/stdlib.h:97:8: error: unknown type name 'size_t'
 extern size_t __ctype_get_mb_cur_max (void) __THROW __wur;
        ^~~~~~