go: cross build support.

srcpkgs/go/template

@@ -3,7 +3,6 @@ pkgname=go
 version=1.2.1
 revision=1
 wrksrc=go
-nostrip=yes
 makedepends="ed bison"
 depends="perl gawk"
 short_desc="The Go Programming Language"
@@ -13,29 +12,37 @@ license="BSD"
 distfiles="http://go.googlecode.com/files/go${version}.src.tar.gz"
 checksum=1655a9367bec083df57cacc29add280c279791801e102fd851c00d8babd12a55
 
+nostrip=yes
+noverifyrdeps=yes
+
 do_build() {
-	cd ${wrksrc}
+	unset GCC CC CXX LD CFLAGS
+
+	case "$XBPS_MACHINE" in
+		arm*) export GOHOSTARCH=arm;;
+		i686*) export GOHOSTARCH=386;;
+		x86_64*) export GOHOSTARCH=amd64;;
+	esac
+	case "$XBPS_TARGET_MACHINE" in
+		armv6l*) export GOARM=6;;
+		armv7l*) export GOARM=7;;
+	esac
+
 	export GOROOT_FINAL="/usr/lib/go"
 	export GOOS=linux
+
+	cd src
+	# ARM build
 	export GOARCH=arm
-	cd src
 	bash make.bash
 
-	cd ${wrksrc}
-	export GOROOT_FINAL="/usr/lib/go"
-	export GOOS=linux
+	# x86 build
 	export GOARCH=386
-	cd src
 	bash make.bash
 
-	if [ "${XBPS_MACHINE}" = "x86_64" ]; then
-		cd ${wrksrc}
-		export GOROOT_FINAL="/usr/lib/go"
-		export GOOS=linux
-		export GOARCH=amd64
-		cd src
-		bash make.bash
-	fi
+	# x86_64 build
+	export GOARCH=amd64
+	bash make.bash
 }
 
 do_install() {
@@ -55,7 +62,19 @@ do_install() {
 
 	cp -r doc misc -t ${DESTDIR}/usr/share/go
 	ln -s /usr/share/go/doc ${DESTDIR}/usr/lib/go/doc
-	cp -a bin ${DESTDIR}/usr
+
+	if [ "$CROSS_BUILD" ]; then
+		case "$XBPS_TARGET_MACHINE" in
+			arm*) bindir=bin/linux_arm;;
+			i686*) bindir=bin/linux_386;;
+			x86_64*) bindir=bin/linux_amd64;;
+		esac
+	else
+		bindir=bin
+	fi
+
+	vmkdir usr/bin
+	cp -a ${bindir}/* ${DESTDIR}/usr/bin
 	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