Unable to build 1.0.1 with LTO

[dvzrv]

Hi! I am currently rebuilding cni-plugins as a package for Arch Linux. In the meantime we have switched to LTO by default (which can be switched off per package).
Unfortunately this fails with cni-plugins:

Building plugins
  bandwidth
# github.com/containernetworking/plugins/plugins/meta/bandwidth
_cgo_callers: relocation target x_cgo_callers not defined
_cgo_init: relocation target x_cgo_init not defined
_cgo_mmap: relocation target x_cgo_mmap not defined
_cgo_munmap: relocation target x_cgo_munmap not defined
_cgo_notify_runtime_init_done: relocation target x_cgo_notify_runtime_init_done not defined
_cgo_sigaction: relocation target x_cgo_sigaction not defined
_cgo_thread_start: relocation target x_cgo_thread_start not defined
runtime._cgo_setenv: relocation target x_cgo_setenv not defined
runtime._cgo_unsetenv: relocation target x_cgo_unsetenv not defined
runtime.cgo_yield: relocation target _cgo_yield not defined
.rela: relocation target _cgo_yield not defined
.rela: relocation target x_cgo_setenv not defined
.rela: relocation target x_cgo_unsetenv not defined
.rela: relocation target x_cgo_init not defined
.rela: relocation target x_cgo_thread_start not defined
.rela: relocation target x_cgo_notify_runtime_init_done not defined
.rela: relocation target x_cgo_callers not defined
.rela: relocation target x_cgo_mmap not defined
.rela: relocation target x_cgo_munmap not defined
.rela: relocation target x_cgo_sigaction not defined`

Full build log:
cni-plugins-1.0.1-build.log

We are currently building the plugins as follows:

  export GOFLAGS="-buildmode=pie -trimpath -mod=readonly -modcacherw"
  export CGO_LDFLAGS="${LDFLAGS}"
  export CGO_CFLAGS="${CFLAGS}"
  export CGO_CPPFLAGS="${CPPFLAGS}"
  export CGO_CXXFLAGS="${CXXFLAGS}"
  ./build_linux.sh

Here CFLAGS, CPPFLAGS, CXXFLAGS and LDFLAGS are our distribution wide build flags.

Is this intentional or a bug?

[dvzrv]

@dcbw this problem is still around with 1.2.0.

Using a stale bot to hide this problem is not really great, as it means that this is likely never going to be fixed and actively discourages people to even report bugs 😢

[squeed]

Yeah, I suspect I need to tweak the stale bot's settings :-/. It's nice to have some old things cleaned out but it's too aggressive.

(FYI I added a "keep" label for things that shouldn't go stale).

[squeed]

@dvzrv none of us have enough go internals knowledge to fix this; do you know someone who could help out?

[invidian]

It seems to me with 1.3.0 enabling LTO builds just fine, so perhaps this can be closed?

In case you try it @dvzrv, perhaps you can also add -X github.com/containernetworking/plugins/pkg/utils/buildversion.BuildVersion=${pkgver}' flag, so binaries show version properly:

$ /opt/cni/bin/bandwidth -v
CNI bandwidth plugin version unknown
CNI protocol versions supported: 0.3.0, 0.3.1, 0.4.0, 1.0.0

Similar issue to microsoft/azurelinux#6339.