The openbsd/mips64 port is effectively unmaintainable. I've been
trying to upstream the direct syscall to libc conversion for two
years now:

  https://github.com/golang/go/issues/61546

Currently, I'm carrying a bunch of extra diffs in ports, I have
limited working hardware to build/test on and when it was broken
in ports for multiple months, no one seemed to notice.

I think it's time to simply give up.

The below removes mips64 from GO_ARCHS, along with armv7 which
seems like it should not be there. Remove mips64 from the
lang/go Makefile and sort the MACHINE_ARCH handling list.
Do the same in go.port.mk, however add riscv64 (neither mips64
or riscv64 were there - not sure what the impact was).

ok?

P.S. I'll deal with the removal of mips64 specific patches in the
upcoming Go 1.23 bump.

Index: infrastructure/mk/arch-defines.mk
===================================================================
RCS file: /cvs/ports/infrastructure/mk/arch-defines.mk,v
diff -u -p -r1.106 arch-defines.mk
--- infrastructure/mk/arch-defines.mk	16 May 2024 11:04:44 -0000	1.106
+++ infrastructure/mk/arch-defines.mk	22 Jun 2024 15:38:10 -0000
@@ -24,7 +24,7 @@ GCC4_ARCHS = alpha hppa sh sparc64
 GCC3_ARCHS = m88k
 # arches where certain ports are available
 MONO_ARCHS = aarch64 amd64 i386
-GO_ARCHS = aarch64 amd64 arm armv7 i386 mips64 riscv64
+GO_ARCHS = aarch64 amd64 arm i386 riscv64
 LUAJIT_ARCHS = aarch64 arm amd64 i386 powerpc
 RUST_ARCHS = aarch64 amd64 i386 powerpc64 riscv64 sparc64
 # arch-specific features that ocaml ports need to know about
Index: lang/go/Makefile
===================================================================
RCS file: /cvs/ports/lang/go/Makefile,v
diff -u -p -r1.151 Makefile
--- lang/go/Makefile	22 Jun 2024 12:43:03 -0000	1.151
+++ lang/go/Makefile	22 Jun 2024 15:38:10 -0000
@@ -1,6 +1,6 @@
 ONLY_FOR_ARCHS =	${GO_ARCHS}
 
-BIN_BOOTSTRAP_GOARCHS =	386 amd64 arm arm64 mips64 riscv64
+BIN_BOOTSTRAP_GOARCHS =	386 amd64 arm arm64 riscv64
 BIN_BOOTSTRAP_VERSION = 1.20.4
 
 COMMENT =		Go programming language
@@ -46,16 +46,14 @@ GOROOT =		${PREFIX}/go
 GOROOT_BOOTSTRAP =
 
 # sync with go.port.mk
-.if ${MACHINE_ARCH} == "amd64"
+.if ${MACHINE_ARCH} == "aarch64"
+GOARCH =		arm64
+.elif ${MACHINE_ARCH} == "amd64"
 GOARCH =		amd64
 .elif ${MACHINE_ARCH} == "arm"
 GOARCH =		arm
-.elif ${MACHINE_ARCH} == "aarch64"
-GOARCH =		arm64
 .elif ${MACHINE_ARCH} == "i386"
 GOARCH =		386
-.elif ${MACHINE_ARCH} == "mips64"
-GOARCH =		mips64
 .elif ${MACHINE_ARCH} == "riscv64"
 GOARCH =		riscv64
 .endif
Index: lang/go/go.port.mk
===================================================================
RCS file: /cvs/ports/lang/go/go.port.mk,v
diff -u -p -r1.73 go.port.mk
--- lang/go/go.port.mk	22 Jun 2024 14:01:40 -0000	1.73
+++ lang/go/go.port.mk	22 Jun 2024 15:38:10 -0000
@@ -23,14 +23,16 @@ _subst := ${_subst}:S/${l:U}/!$l/g
 BUILD_DEPENDS +=	${MODGO_BUILD_DEPENDS}
 .endif
 
-.if ${MACHINE_ARCH} == "amd64"
+.if ${MACHINE_ARCH} == "aarch64"
+_GOARCH =	arm64
+.elif ${MACHINE_ARCH} == "amd64"
 _GOARCH =	amd64
 .elif ${MACHINE_ARCH} == "arm"
 _GOARCH =	arm
-.elif ${MACHINE_ARCH} == "aarch64"
-_GOARCH =	arm64
 .elif ${MACHINE_ARCH} == "i386"
 _GOARCH =	386
+.elif ${MACHINE_ARCH} == "riscv64"
+_GOARCH =	riscv64
 .endif
 
 MODGO_PACKAGE_PATH =	${PREFIX}/go-pkg