Remove gccgo support

Since Go 1.7, s390x uses upstream Go, so we have no reason to
support gccgo any more.

Signed-off-by: Justin Cormack <justin.cormack@docker.com>
Upstream-commit: eda90f63446253f97d2011926555306f2417d208
Component: engine

components/engine/hack/make/.integration-daemon-start

@@ -3,7 +3,7 @@
 # see test-integration-cli for example usage of this script
 
 base="$ABS_DEST/.."
-export PATH="$base/binary-client:$base/binary-daemon:$base/dynbinary-client:$base/dynbinary-daemon:$base/gccgo:$base/dyngccgo:$PATH"
+export PATH="$base/binary-client:$base/binary-daemon:$base/dynbinary-client:$base/dynbinary-daemon:$PATH"
 
 if ! command -v docker &> /dev/null; then
 	echo >&2 'error: binary-client or dynbinary-client must be run before .integration-daemon-start'

components/engine/hack/make/dyngccgo

@@ -1,11 +0,0 @@
-#!/bin/bash
-set -e
-
-(
-	export IAMSTATIC="false"
-	export EXTLDFLAGS_STATIC=''
-	export LDFLAGS_STATIC_DOCKER=''
-	export BUILDFLAGS=( "${BUILDFLAGS[@]/netgo /}" ) # disable netgo, since we don't need it for a dynamic binary
-	export BUILDFLAGS=( "${BUILDFLAGS[@]/static_build /}" ) # we're not building a "static" binary here
-	source "${MAKEDIR}/gccgo"
-)

components/engine/hack/make/gccgo

@@ -1,68 +0,0 @@
-#!/bin/bash
-set -e
-
-BINARY_NAME="dockerd-$VERSION"
-BINARY_EXTENSION="$(binary_extension)"
-BINARY_FULLNAME="$BINARY_NAME$BINARY_EXTENSION"
-
-PROXY_NAME="docker-proxy-$VERSION"
-PROXY_FULLNAME="$PROXY_NAME$BINARY_EXTENSION"
-
-CLIENTBIN_NAME="docker-$VERSION"
-CLIENTBIN_FULLNAME="$CLIENTBIN_NAME$BINARY_EXTENSION"
-
-source "${MAKEDIR}/.go-autogen"
-
-if [[ "${BUILDFLAGS[@]}" =~ 'netgo ' ]]; then
-	EXTLDFLAGS_STATIC+=' -lnetgo'
-fi
-# gccgo require explicit flag -pthread to allow goroutines to work.
-go build -compiler=gccgo \
-	-o "$DEST/$BINARY_FULLNAME" \
-	"${BUILDFLAGS[@]}" \
-	-gccgoflags "
-		-g
-		$EXTLDFLAGS_STATIC
-		-Wl,--no-export-dynamic
-		-ldl
-		-pthread
-	" \
-	./cmd/dockerd
-
-echo "Created binary: $DEST/$BINARY_FULLNAME"
-ln -sf "$BINARY_FULLNAME" "$DEST/dockerd$BINARY_EXTENSION"
-
-go build -compiler=gccgo \
-	-o "$DEST/$PROXY_FULLNAME" \
-	"${BUILDFLAGS[@]}" \
-	-gccgoflags "
-		-g
-		$EXTLDFLAGS_STATIC
-		-Wl,--no-export-dynamic
-		-ldl
-		-pthread
-	" \
-	./vendor/src/github.com/docker/libnetwork/cmd/proxy
-
-echo "Created binary: $DEST/$PROXY_FULLNAME"
-ln -sf "$PROXY_FULLNAME" "$DEST/docker-proxy$BINARY_EXTENSION"
-
-copy_containerd "$DEST" "hash"
-hash_files "$DEST/$BINARY_FULLNAME"
-
-go build -compiler=gccgo \
-	-o "$DEST/$CLIENTBIN_FULLNAME" \
-	"${BUILDFLAGS[@]}" \
-	-gccgoflags "
-		-g
-		$EXTLDFLAGS_STATIC
-		-Wl,--no-export-dynamic
-		-ldl
-		-pthread
-	" \
-	./cmd/docker
-
-echo "Created binary: $DEST/$CLIENTBIN_FULLNAME"
-ln -sf "$CLIENTBIN_FULLNAME" "$DEST/docker$BINARY_EXTENSION"
-hash_files "$DEST/$CLIENTBIN_FULLNAME"
-

components/engine/hack/make/test-unit

@@ -34,13 +34,9 @@ bundle_test_unit() {
 		| grep -v github.com/docker/docker/vendor \
 		| grep -v github.com/docker/docker/man \
 		| grep -v github.com/docker/docker/integration-cli)
-	go test $COVER $GCCGOFLAGS -ldflags "$LDFLAGS" "${BUILDFLAGS[@]}" $TESTFLAGS $pkg_list
+	go test $COVER -ldflags "$LDFLAGS" "${BUILDFLAGS[@]}" $TESTFLAGS $pkg_list
 }
 
+COVER=-cover
 
-if [[ "$(go version)" == *"gccgo"* ]]; then
-	GCCGOFLAGS=-gccgoflags="-lpthread"
-else
-	COVER=-cover
-fi
 bundle_test_unit 2>&1 | tee -a "$DEST/test.log"