rwynn/monstache-builder-cache-rel6 is not available for arm64

[jschmied]

compiling with amd64 version leads to a plugin producing:

Unable to load mapper plugin /tmp/plugin/xxx.so: plugin: not implemented

putting

GOARCH=arm64 GOOS=linux

into monstache/docker/plugin/Dockerfile leads to errors in build:

[8/8] RUN GOARCH=arm64 GOOS=linux go build -buildmode=plugin -o xxx.so xxx.go:
18.04 # command-line-arguments
18.04 loadinternal: cannot find runtime/cgo
18.04 /usr/local/go/pkg/tool/linux_amd64/link: running gcc failed: exit status 1
18.04 collect2: fatal error: cannot find 'ld'
18.04 compilation terminated.

adding CGO_ENABLED=1 to the line ends up with:

9.332 gcc_arm64.S: Assembler messages:
9.332 gcc_arm64.S:30: Error: no such instruction: `stp x29,x30,[sp,'

using GOS=darwin also does not work:

[8/8] RUN CGO_ENABLED=1 GOARCH=arm64 GOOS=darwin go build -buildmode=plugin -o xxx.so xxx.go:
4.058 # runtime/cgo
4.058 gcc: error: unrecognized command-line option '-arch'

did anybody succeed building on M3 mac?

[pablosproject]

@rwynn Is there any source code we can get for the images used to build plugin? It'll be easy to set it up to build also for arm and solve most of the issues.