[Bug 240551] lang/go14 unable to build on 12.x using a custom kernel devoid of COMPAT_FREEBSD11

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240551

            Bug ID: 240551
           Summary: lang/go14 unable to build on 12.x using a custom
                    kernel devoid of COMPAT_FREEBSD11
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: jlaffaye at FreeBSD.org
          Reporter: dewayne at heuristicsystems.com.au
             Flags: maintainer-feedback?(jlaffaye at FreeBSD.org)
          Assignee: jlaffaye at FreeBSD.org

This is to track the remediation of the bug where go14 will not build on a
custom 12.x kernel unless "options COMPAT_FREEBSD11" is included.

The go folks identified the upcoming problem in 2017.  Patches have been
developed, unfortunately only 2 of the three could be successfully applied to
go 1.4.3_5:
https://go-review.googlesource.com/c/go/+/143637/3/src/syscall/export_freebsd_test.go

https://go-review.googlesource.com/c/go/+/143637/3/src/syscall/syscall_freebsd_test.go

but this failed.
https://go-review.googlesource.com/c/go/+/143637/3/src/syscall/syscall_freebsd.go

Incidentally.  For those, like me also running ASLR, the patch at
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235735
also applied cleanly :)

It would be appropriate to close this when we can actually get go14 to build
without requiring additional options to the kernel.  Admittedly if you use
GENERIC, you will not see this problem.

It is appreciated that there are enthusiasts looking after
https://github.com/golang/go/wiki/FreeBSD :) 

I don't know where I could've found this information before moving from 11.3S
to 12.1-PreRelease, as we wouldn't have upgraded had we know that some of our
key applications would not build.  Unfortunately I can't even suggest a
sufficient test for BROKEN-ness - either kern.ident = GENERIC or the custom
kernel may include COMPAT_FREEBSD11.

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