cmd/link: SIGSEGV running 'openshift-install version' for release-4.8 using external linking on PPC64LE [1.16 backport]

[gopherbot]

@pmur requested issue #45850 to be considered for backport to the next 1.16 minor release.

@gopherbot this affects building openshift with go1.16, please consider a backport.

[gopherbot]

Change https://golang.org/cl/316750 mentions this issue: cmd/link/internal: fix use of DynlinkingGo with ppc64le trampolines

[laboger]

This is a bug that occurs when trying to build binaries for Openshift. These trampoline errors occur because the size of the text section gets too large -- and some of these binaries must have been teetering near the limit and just recently went over after a Kubernetes update. Also, the program with the large text section must use a plugin to cause this error, because that is why DynlinkingGo was returning an incorrect result.

[toothrot]

@laboger @cherrymui Can you confirm here that this only impacts Go 1.16? This is approved as a serious issue with no workaround, and assuming we do not need to change anything in 1.15.

[cherrymui]

I think it probably affects 1.15 as well.

[toothrot]

Thanks, I also opened #46002 for Go 1.15.