community/go: force external link mode for ppc64le again

This re-enables 866f2e1. While Go
1.18.1 fixed the initial linking error we encountered with Go 1.18
on ppc64le it seems there are two more regressions with -buildmode=pie
and CGO_CFLAGS=-Os. See:

* golang/go#52336
* golang/go#52337

Forcing external link mode seems to be a workaround for now.

Fixes #13692

community/go/APKBUILD

@@ -4,7 +4,7 @@
 pkgname=go
 # go binaries are statically linked, security updates require rebuilds
 pkgver=1.18.1
-pkgrel=0
+pkgrel=1
 pkgdesc="Go programming language compiler"
 url="https://go.dev/"
 arch="all"
@@ -15,6 +15,7 @@ checkdepends="binutils-gold"
 subpackages="$pkgname-doc"
 source="https://go.dev/dl/go$pkgver.src.tar.gz
 	allow-unshare-to-return-enosys.patch
+	force-external-link-on-ppc64le.patch
 	"
 case "$CARCH" in
 	arm*|aarch64) depends="binutils-gold";;
@@ -122,6 +123,13 @@ case "$CARCH" in
 x86_64|s390x|aarch64) export GO_LDFLAGS=-buildmode=pie ;;
 esac
 
+# Disable tests on ppc64 for now since they fail due to the
+# force-external-link-on-ppc64le.patch we employ currently.
+# See the patch description for details.
+case "$CARCH" in
+ppc64le) options="!check" ;;
+esac
+
 prepare() {
 	default_prepare
 
@@ -202,4 +210,5 @@ package() {
 sha512sums="
 baa053e2d713b235b9285c946b4f0842085a5224d1f4cbe92a446fbf97ed9f7289c8d4ba212fb31dd2e4eac39bb4c015f478543a1856594c2d1fc331c946f571  go1.18.1.src.tar.gz
 6017caacf77c2911e9e882878fdaa2ed066b76b7e97b2ad776bc33d96b21cabc802966473946642c86a8f985c69adcc5e7ea61684f6d0dbacd468a6aad687229  allow-unshare-to-return-enosys.patch
+9e1d052cb030281093fc3f6862986b9d81a15ca344cb8be90eddd7a97e0ab74f8b022e79f6beefad81a53b041878c4644e8143ef7eeca4fc1757df97c73ff15b  force-external-link-on-ppc64le.patch
 "

community/go/force-external-link-on-ppc64le.patch

@@ -0,0 +1,17 @@
+See https://github.com/golang/go/issues/51787#issuecomment-1072700785
+
+Re-Enabled for Go 1.18.1, see:
+
+	https://gitlab.alpinelinux.org/alpine/aports/-/issues/13692
+
+--- go.orig/src/cmd/link/internal/ld/config.go
++++ go/src/cmd/link/internal/ld/config.go
+@@ -212,7 +212,7 @@
+ 		// windows/arm64 internal linking is not implemented.
+ 		return true, buildcfg.GOOS + "/" + buildcfg.GOARCH + " does not support internal cgo"
+ 	}
+-	if iscgo && ctxt.Arch == sys.ArchPPC64 {
++	if iscgo && (ctxt.Arch == sys.ArchPPC64 || ctxt.Arch == sys.ArchPPC64LE) {
+ 		// Big Endian PPC64 cgo internal linking is not implemented for aix or linux.
+ 		return true, buildcfg.GOOS + " does not support internal cgo"
+ 	}