go: split cross compilers into separate packages

add one package per officially supported operating system, that contains
the cross compilers for all officially supported architectures on that
OS.

srcpkgs/go-cross-darwin

@@ -0,0 +1 @@
+go

srcpkgs/go-cross-freebsd

@@ -0,0 +1 @@
+go

srcpkgs/go-cross-linux

@@ -0,0 +1 @@
+go

srcpkgs/go-cross-windows

@@ -0,0 +1 @@
+go

srcpkgs/go/template

@@ -1,7 +1,7 @@
 # Template file for 'go'
 pkgname=go
 version=1.3.1
-revision=1
+revision=2
 wrksrc=go
 hostmakedepends="mercurial ca-certificates"
 depends="perl"
@@ -15,25 +15,25 @@ checksum=fdfa148cc12f1e4ea45a5565261bf43d8a2e7d1fad4a16aed592d606223b93a8
 nostrip=yes
 noverifyrdeps=yes
 
-do_build() {
-	unset GCC CC CXX LD CFLAGS
-
+_go_targetarch() {
 	case "$XBPS_MACHINE" in
-		arm*) export GOHOSTARCH=arm;;
-		i686*) export GOHOSTARCH=386;;
-		x86_64*) export GOHOSTARCH=amd64;;
+		arm*) export hostarch=arm;;
+		i686*) export hostarch=386;;
+		x86_64*) export hostarch=amd64;;
 	esac
 	case "$XBPS_TARGET_MACHINE" in
 		arm*) targetarch=arm;;
 		i686*) targetarch=386;;
 		x86_64*) targetarch=amd64;;
-		*) targetarch=$GOHOSTARCH;;
-	esac
-	case "$XBPS_TARGET_MACHINE" in
-		armv6l*) export GOARM=6;;
-		armv7l*) export GOARM=7;;
+		*) targetarch=$hostarch;;
 	esac
+	echo $targetarch
+}
 
+do_build() {
+	unset GCC CC CXX LD CFLAGS
+
+	targetarch=$(_go_targetarch)
 	export GOROOT=$PWD
 	export GOROOT_FINAL="/usr/lib/go"
 	export GOOS=
@@ -105,7 +105,7 @@ do_install() {
 	fi
 
 	vmkdir usr/bin
-	cp -a ${bindir}/* ${DESTDIR}/usr/bin
+	cp -d --preserve=all ${bindir}/* ${DESTDIR}/usr/bin || true
 	cp -a pkg ${DESTDIR}/usr/lib/go
 	cp -a src/pkg ${DESTDIR}/usr/lib/go/src/
 	cp -a src/cmd ${DESTDIR}/usr/lib/go/src/cmd
@@ -140,3 +140,69 @@ do_install() {
 
 	rm -f ${DESTDIR}/usr/share/go/doc/articles/wiki/get.bin
 }
+
+go-cross-linux_package() {
+	nostrip=yes
+	depends="${sourcepkg}-${version}_${revision}"
+	short_desc+=" - Cross compilers for Linux"
+	pkg_install() {
+		targetarch=$(_go_targetarch)
+		mkdir -p $PKGDESTDIR/usr/lib/go/pkg/tool/
+		cd ${DESTDIR}/usr/lib/go/pkg/tool/
+		for i in linux_*; do
+			if [ "$i" != "linux_${targetarch}" ]; then
+				mv "$i" $PKGDESTDIR/usr/lib/go/pkg/tool/
+			fi
+		done
+
+		mkdir -p $PKGDESTDIR/usr/lib/go/pkg/
+		cd ${DESTDIR}/usr/lib/go/pkg/
+		for i in linux_*; do
+			if [ "$i" != "linux_${targetarch}" ]; then
+				mv "$i" $PKGDESTDIR/usr/lib/go/pkg/
+			fi
+		done
+
+		mkdir -p $PKGDESTDIR/usr/lib/go/src/pkg/runtime/
+		cd ${DESTDIR}/usr/lib/go/src/pkg/runtime/
+		for i in zasm_linux_*.h; do
+			if [ "$i" != "zasm_linux_${targetarch}.h" ]; then
+				mv "$i" $PKGDESTDIR/usr/lib/go/src/pkg/runtime/
+			fi
+		done
+	}
+}
+
+go-cross-darwin_package() {
+	nostrip=yes
+	depends="${sourcepkg}-${version}_${revision}"
+	short_desc+=" - Cross compilers for Darwin"
+	pkg_install() {
+		vmove "usr/lib/go/pkg/tool/darwin_*"
+		vmove "usr/lib/go/pkg/darwin_*"
+		vmove "usr/lib/go/src/pkg/runtime/zasm_darwin_*.h"
+	}
+}
+
+go-cross-freebsd_package() {
+	nostrip=yes
+	depends="${sourcepkg}-${version}_${revision}"
+	short_desc+=" - Cross compilers for FreeBSD"
+	pkg_install() {
+		vmove "usr/lib/go/pkg/tool/freebsd_*"
+		vmove "usr/lib/go/pkg/freebsd_*"
+		vmove "usr/lib/go/src/pkg/runtime/zasm_freebsd_*.h"
+	}
+}
+
+
+go-cross-windows_package() {
+	nostrip=yes
+	depends="${sourcepkg}-${version}_${revision}"
+	short_desc+=" - Cross compilers for Windows"
+	pkg_install() {
+		vmove "usr/lib/go/pkg/tool/windows_*"
+		vmove "usr/lib/go/pkg/windows_*"
+		vmove "usr/lib/go/src/pkg/runtime/zasm_windows_*.h"
+	}
+}