From c137c382573f114902607546c5ed5b562df0b9b0 Mon Sep 17 00:00:00 2001
From: Jeffery To <jeffery.to@gmail.com>
Date: Sun, 18 Mar 2018 00:32:35 +0800
Subject: [PATCH] golang: new packages

From golang.org:
The Go programming language is an open source project to make
programmers more productive.

This commit consists of two "parts":

* golang/host: Main Go compiler for host (installed to
  STAGING_DIR_HOST/lib/go-cross), used to cross-compile Go programs to
  be packaged.

* golang (and golang-src/golang-doc): Main Go compiler for on-target
  development. These packages are quite large, but I would expect only
  developers to install these.

Signed-off-by: Jeffery To <jeffery.to@gmail.com>
---
 lang/golang/golang-compiler.mk         | 186 ++++++++++++++++
 lang/golang/golang-package.mk          | 297 +++++++++++++++++++++++++
 lang/golang/golang-values.mk           |  72 ++++++
 lang/golang/golang-version.mk          |  14 ++
 lang/golang/golang/Makefile            | 277 +++++++++++++++++++++++
 lang/golang/golang/files/go-gcc-helper |  23 ++
 6 files changed, 869 insertions(+)
 create mode 100644 lang/golang/golang-compiler.mk
 create mode 100644 lang/golang/golang-package.mk
 create mode 100644 lang/golang/golang-values.mk
 create mode 100644 lang/golang/golang-version.mk
 create mode 100644 lang/golang/golang/Makefile
 create mode 100644 lang/golang/golang/files/go-gcc-helper

diff --git a/lang/golang/golang-compiler.mk b/lang/golang/golang-compiler.mk
new file mode 100644
index 000000000..5e7fe689d
--- /dev/null
+++ b/lang/golang/golang-compiler.mk
@@ -0,0 +1,186 @@
+#
+# Copyright (C) 2018 Jeffery To
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+ifeq ($(origin GO_INCLUDE_DIR),undefined)
+  GO_INCLUDE_DIR:=$(dir $(lastword $(MAKEFILE_LIST)))
+endif
+
+include $(GO_INCLUDE_DIR)/golang-values.mk
+
+
+# $(1) valid GOOS_GOARCH combinations
+# $(2) go version id
+define GoCompiler/Default/CheckHost
+	$(if $(filter $(GO_HOST_OS_ARCH),$(1)),,$(error go-$(2) cannot be installed on $(GO_HOST_OS)/$(GO_HOST_ARCH)))
+endef
+
+# $(1) source go root
+# $(2) destination prefix
+# $(3) go version id
+# $(4) additional environment variables (optional)
+define GoCompiler/Default/Make
+	( \
+		cd $(1)/src ; \
+		$(if $(2),GOROOT_FINAL=$(2)/lib/go-$(3)) \
+		$(4) \
+		$(BASH) make.bash --no-banner ; \
+	)
+endef
+
+# $(1) destination prefix
+# $(2) go version id
+define GoCompiler/Default/Install/make-dirs
+	$(INSTALL_DIR) $(1)/lib/go-$(2)
+	$(INSTALL_DIR) $(1)/share/go-$(2)
+endef
+
+# $(1) source go root
+# $(2) destination prefix
+# $(3) go version id
+# $(4) file/directory name
+define GoCompiler/Default/Install/install-share-data
+	$(CP) $(1)/$(4) $(2)/share/go-$(3)/
+	$(LN) ../../share/go-$(3)/$(4) $(2)/lib/go-$(3)/
+endef
+
+# $(1) source go root
+# $(2) destination prefix
+# $(3) go version id
+# $(4) GOOS_GOARCH
+define GoCompiler/Default/Install/Bin
+	$(call GoCompiler/Default/Install/make-dirs,$(2),$(3))
+
+	$(call GoCompiler/Default/Install/install-share-data,$(1),$(2),$(3),api)
+
+	$(INSTALL_DATA) -p $(1)/VERSION $(2)/lib/go-$(3)/
+
+	for file in AUTHORS CONTRIBUTING.md CONTRIBUTORS LICENSE PATENTS README README.md; do \
+		if [ -f $(1)/$$$$file ]; then \
+			$(INSTALL_DATA) -p $(1)/$$$$file $(2)/share/go-$(3)/ ; \
+		fi ; \
+	done
+
+	$(INSTALL_DIR) $(2)/lib/go-$(3)/bin
+
+  ifeq ($(4),$(GO_HOST_OS_ARCH))
+	$(INSTALL_BIN) -p $(1)/bin/* $(2)/lib/go-$(3)/bin/
+  else
+	$(INSTALL_BIN) -p $(1)/bin/$(4)/* $(2)/lib/go-$(3)/bin/
+  endif
+
+	$(INSTALL_DIR) $(2)/lib/go-$(3)/pkg
+	$(CP) $(1)/pkg/$(4) $(2)/lib/go-$(3)/pkg/
+
+	$(INSTALL_DIR) $(2)/lib/go-$(3)/pkg/tool/$(4)
+	$(INSTALL_BIN) -p $(1)/pkg/tool/$(4)/* $(2)/lib/go-$(3)/pkg/tool/$(4)/
+endef
+
+# $(1) destination prefix
+# $(2) go version id
+define GoCompiler/Default/Install/BinLinks
+	$(INSTALL_DIR) $(1)/bin
+	$(LN) ../lib/go-$(2)/bin/go $(1)/bin/go
+	$(LN) ../lib/go-$(2)/bin/gofmt $(1)/bin/gofmt
+endef
+
+# $(1) source go root
+# $(2) destination prefix
+# $(3) go version id
+define GoCompiler/Default/Install/Doc
+	$(call GoCompiler/Default/Install/make-dirs,$(2),$(3))
+
+	$(call GoCompiler/Default/Install/install-share-data,$(1),$(2),$(3),doc)
+	$(call GoCompiler/Default/Install/install-share-data,$(1),$(2),$(3),favicon.ico)
+	$(call GoCompiler/Default/Install/install-share-data,$(1),$(2),$(3),robots.txt)
+endef
+
+# $(1) source go root
+# $(2) destination prefix
+# $(3) go version id
+define GoCompiler/Default/Install/Src
+	$(call GoCompiler/Default/Install/make-dirs,$(2),$(3))
+
+	$(call GoCompiler/Default/Install/install-share-data,$(1),$(2),$(3),lib)
+	$(call GoCompiler/Default/Install/install-share-data,$(1),$(2),$(3),misc)
+	$(call GoCompiler/Default/Install/install-share-data,$(1),$(2),$(3),src)
+	$(call GoCompiler/Default/Install/install-share-data,$(1),$(2),$(3),test)
+
+	$(FIND) \
+		$(2)/share/go-$(3)/src/ \
+		\! -type d -a \( -name '*.bat' -o -name '*.rc' \) \
+		-delete
+
+	if [ -d $(1)/pkg/include ]; then \
+		$(INSTALL_DIR) $(2)/lib/go-$(3)/pkg ; \
+		$(INSTALL_DIR) $(2)/share/go-$(3)/pkg ; \
+		$(CP) $(1)/pkg/include $(2)/share/go-$(3)/pkg/ ; \
+		$(LN) ../../../share/go-$(3)/pkg/include $(2)/lib/go-$(3)/pkg/ ; \
+	fi
+endef
+
+# $(1) destination prefix
+# $(2) go version id
+define GoCompiler/Default/Uninstall
+	rm -rf $(1)/lib/go-$(2)
+	rm -rf $(1)/share/go-$(2)
+endef
+
+# $(1) destination prefix
+define GoCompiler/Default/Uninstall/BinLinks
+	rm -f $(1)/bin/go
+	rm -f $(1)/bin/gofmt
+endef
+
+
+# $(1) profile name
+# $(2) source go root
+# $(3) destination prefix
+# $(4) go version id
+# $(5) GOOS_GOARCH
+define GoCompiler/AddProfile
+
+  # $$(1) valid GOOS_GOARCH combinations
+  define GoCompiler/$(1)/CheckHost
+	$$(call GoCompiler/Default/CheckHost,$$(1),$(4))
+  endef
+
+  # $$(1) additional environment variables (optional)
+  define GoCompiler/$(1)/Make
+	$$(call GoCompiler/Default/Make,$(2),$(3),$(4),$$(1))
+  endef
+
+  # $$(1) override install prefix (optional)
+  define GoCompiler/$(1)/Install/Bin
+	$$(call GoCompiler/Default/Install/Bin,$(2),$$(or $$(1),$(3)),$(4),$(5))
+  endef
+
+  # $$(1) override install prefix (optional)
+  define GoCompiler/$(1)/Install/BinLinks
+	$$(call GoCompiler/Default/Install/BinLinks,$$(or $$(1),$(3)),$(4))
+  endef
+
+  # $$(1) override install prefix (optional)
+  define GoCompiler/$(1)/Install/Doc
+	$$(call GoCompiler/Default/Install/Doc,$(2),$$(or $$(1),$(3)),$(4))
+  endef
+
+  # $$(1) override install prefix (optional)
+  define GoCompiler/$(1)/Install/Src
+	$$(call GoCompiler/Default/Install/Src,$(2),$$(or $$(1),$(3)),$(4))
+  endef
+
+  # $$(1) override install prefix (optional)
+  define GoCompiler/$(1)/Uninstall
+	$$(call GoCompiler/Default/Uninstall,$$(or $$(1),$(3)),$(4))
+  endef
+
+  # $$(1) override install prefix (optional)
+  define GoCompiler/$(1)/Uninstall/BinLinks
+	$$(call GoCompiler/Default/Uninstall/BinLinks,$$(or $$(1),$(3)))
+  endef
+
+endef
diff --git a/lang/golang/golang-package.mk b/lang/golang/golang-package.mk
new file mode 100644
index 000000000..a42bc6417
--- /dev/null
+++ b/lang/golang/golang-package.mk
@@ -0,0 +1,297 @@
+#
+# Copyright (C) 2018 Jeffery To
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+ifeq ($(origin GO_INCLUDE_DIR),undefined)
+  GO_INCLUDE_DIR:=$(dir $(lastword $(MAKEFILE_LIST)))
+endif
+
+include $(GO_INCLUDE_DIR)/golang-values.mk
+
+
+# Variables (all optional, except GO_PKG) to be set in package
+# Makefiles:
+#
+# GO_PKG (required) - name of Go package
+#
+#   Go name of the package.
+#
+#   e.g. GO_PKG:=golang.org/x/text
+#
+#
+# GO_PKG_INSTALL_EXTRA - list of regular expressions, default empty
+#
+#   Additional files/directories to install. By default, only these
+#   files are installed:
+#
+#   * Files with one of these extensions:
+#     .go, .c, .cc, .h, .hh, .proto, .s
+#
+#   * Files in any 'testdata' directory
+#
+#   e.g. GO_PKG_INSTALL_EXTRA:=example.toml marshal_test.toml
+#
+#
+# GO_PKG_INSTALL_ALL - boolean (0 or 1), default false
+#
+#   If true, install all files regardless of extension or directory.
+#
+#   e.g. GO_PKG_INSTALL_ALL:=1
+#
+#
+# GO_PKG_SOURCE_ONLY - boolean (0 or 1), default false
+#
+#   If true, 'go install' will not be called. If the package does not
+#   (or should not) build any binaries, then specifying this option will
+#   save build time.
+#
+#   e.g. GO_PKG_SOURCE_ONLY:=1
+#
+#
+# GO_PKG_BUILD_PKG - list of build targets, default GO_PKG/...
+#
+#   Build targets for compiling this Go package, i.e. arguments passed
+#   to 'go install'
+#
+#   e.g. GO_PKG_BUILD_PKG:=github.com/debian/ratt/cmd/...
+#
+#
+# GO_PKG_EXCLUDES - list of regular expressions, default empty
+#
+#   Patterns to exclude from the build targets expanded from
+#   GO_PKG_BUILD_PKG.
+#
+#   e.g. GO_PKG_EXCLUDES:=examples/
+#
+#
+# GO_PKG_GO_GENERATE - boolean (0 or 1), default false
+#
+#   If true, 'go generate' will be called on all build targets (as
+#   determined by GO_PKG_BUILD_PKG and GO_PKG_EXCLUDES). This is usually
+#   not necessary.
+#
+#   e.g. GO_PKG_GO_GENERATE:=1
+
+# Credit for this package build process (GoPackage/Build/Configure and
+# GoPackage/Build/Compile) belong to Debian's dh-golang completely.
+# https://anonscm.debian.org/cgit/pkg-go/packages/dh-golang.git
+
+
+# for building packages, not user code
+GO_PKG_PATH:=/usr/share/gocode
+
+GO_PKG_BUILD_PKG?=$(GO_PKG)/...
+
+GO_PKG_WORK_DIR_NAME:=.go_work
+GO_PKG_WORK_DIR:=$(PKG_BUILD_DIR)/$(GO_PKG_WORK_DIR_NAME)
+
+GO_PKG_BUILD_DIR:=$(GO_PKG_WORK_DIR)/build
+GO_PKG_CACHE_DIR:=$(GO_PKG_WORK_DIR)/cache
+GO_PKG_TMP_DIR:=$(GO_PKG_WORK_DIR)/tmp
+
+GO_PKG_BUILD_BIN_DIR:=$(GO_PKG_BUILD_DIR)/bin$(if \
+  $(GO_HOST_TARGET_DIFFERENT),/$(GO_OS)_$(GO_ARCH))
+
+GO_PKG_BUILD_DEPENDS_SRC:=$(STAGING_DIR)$(GO_PKG_PATH)/src
+
+# sstrip causes corrupted section header size
+ifneq ($(CONFIG_USE_SSTRIP),)
+  ifneq ($(CONFIG_DEBUG),)
+    GO_PKG_STRIP_ARGS:=--strip-unneeded --remove-section=.comment --remove-section=.note
+  else
+    GO_PKG_STRIP_ARGS:=--strip-all
+  endif
+  STRIP:=$(TARGET_CROSS)strip $(GO_PKG_STRIP_ARGS)
+  RSTRIP= \
+    export CROSS="$(TARGET_CROSS)" \
+		$(if $(PKG_BUILD_ID),KEEP_BUILD_ID=1) \
+		$(if $(CONFIG_KERNEL_KALLSYMS),NO_RENAME=1) \
+		$(if $(CONFIG_KERNEL_PROFILING),KEEP_SYMBOLS=1); \
+    NM="$(TARGET_CROSS)nm" \
+    STRIP="$(STRIP)" \
+    STRIP_KMOD="$(SCRIPT_DIR)/strip-kmod.sh" \
+    PATCHELF="$(STAGING_DIR_HOST)/bin/patchelf" \
+    $(SCRIPT_DIR)/rstrip.sh
+endif
+
+define GoPackage/GoSubMenu
+  SUBMENU:=Go
+  SECTION:=lang
+  CATEGORY:=Languages
+endef
+
+define GoPackage/Environment
+	GOOS=$(GO_OS) \
+	GOARCH=$(GO_ARCH) \
+	GO386=$(GO_386) \
+	GOARM=$(GO_ARM) \
+	GOMIPS=$(GO_MIPS) \
+	CGO_ENABLED=1 \
+	CGO_CFLAGS="$(filter-out $(GO_CFLAGS_TO_REMOVE),$(TARGET_CFLAGS))" \
+	CGO_CPPFLAGS="$(TARGET_CPPFLAGS)" \
+	CGO_CXXFLAGS="$(filter-out $(GO_CFLAGS_TO_REMOVE),$(TARGET_CXXFLAGS))"
+endef
+
+# false if directory does not exist
+GoPackage/is_dir_not_empty=$$$$($(FIND) $(1) -maxdepth 0 -type d \! -empty 2>/dev/null)
+
+GoPackage/has_binaries=$(call GoPackage/is_dir_not_empty,$(GO_PKG_BUILD_BIN_DIR))
+
+define GoPackage/Build/Configure
+	( \
+		cd $(PKG_BUILD_DIR) ; \
+		mkdir -p $(GO_PKG_BUILD_DIR)/bin $(GO_PKG_BUILD_DIR)/src \
+			$(GO_PKG_CACHE_DIR) $(GO_PKG_TMP_DIR) ; \
+		\
+		files=$$$$($(FIND) ./ \
+			-type d -a \( -path './.git' -o -path './$(GO_PKG_WORK_DIR_NAME)' \) -prune -o \
+			\! -type d -print | \
+			sed 's|^\./||') ; \
+		\
+		if [ "$(GO_PKG_INSTALL_ALL)" != 1 ]; then \
+			code=$$$$(echo "$$$$files" | grep '\.\(c\|cc\|go\|h\|hh\|proto\|s\)$$$$') ; \
+			testdata=$$$$(echo "$$$$files" | grep '\(^\|/\)testdata/') ; \
+			\
+			for pattern in $(GO_PKG_INSTALL_EXTRA); do \
+				extra=$$$$(echo "$$$$extra"; echo "$$$$files" | grep "$$$$pattern") ; \
+			done ; \
+			\
+			files=$$$$(echo "$$$$code"; echo "$$$$testdata"; echo "$$$$extra") ; \
+			files=$$$$(echo "$$$$files" | grep -v '^[[:space:]]*$$$$' | sort -u) ; \
+		fi ; \
+		\
+		echo "Copying files from $(PKG_BUILD_DIR) into $(GO_PKG_BUILD_DIR)/src/$(GO_PKG)" ; \
+		for file in $$$$files; do \
+			echo $$$$file ; \
+			dest=$(GO_PKG_BUILD_DIR)/src/$(GO_PKG)/$$$$file ; \
+			mkdir -p $$$$(dirname $$$$dest) ; \
+			$(CP) $$$$file $$$$dest ; \
+		done ; \
+		\
+		link_contents() { \
+			local src=$$$$1 ; \
+			local dest=$$$$2 ; \
+			local dirs dir base ; \
+			\
+			if [ -n "$$$$($(FIND) $$$$src -mindepth 1 -maxdepth 1 -name '*.go' \! -type d)" ]; then \
+				echo "$$$$src is already a Go library" ; \
+				return 1 ; \
+			fi ; \
+			\
+			dirs=$$$$($(FIND) $$$$src -mindepth 1 -maxdepth 1 -type d) ; \
+			for dir in $$$$dirs; do \
+				base=$$$$(basename $$$$dir) ; \
+				if [ -d $$$$dest/$$$$base ]; then \
+					case $$$$dir in \
+					*$(GO_PKG_PATH)/src/$(GO_PKG)) \
+						echo "$(GO_PKG) is already installed. Please check for circular dependencies." ;; \
+					*) \
+						link_contents $$$$src/$$$$base $$$$dest/$$$$base ;; \
+					esac ; \
+				else \
+					echo "...$$$${src#$(GO_PKG_BUILD_DEPENDS_SRC)}/$$$$base" ; \
+					$(LN) $$$$src/$$$$base $$$$dest/$$$$base ; \
+				fi ; \
+			done ; \
+		} ; \
+		\
+		if [ "$(GO_PKG_SOURCE_ONLY)" != 1 ]; then \
+			if [ -d $(GO_PKG_BUILD_DEPENDS_SRC) ]; then \
+				echo "Symlinking directories from $(GO_PKG_BUILD_DEPENDS_SRC) into $(GO_PKG_BUILD_DIR)/src" ; \
+				link_contents $(GO_PKG_BUILD_DEPENDS_SRC) $(GO_PKG_BUILD_DIR)/src ; \
+			else \
+				echo "$(GO_PKG_BUILD_DEPENDS_SRC) does not exist, skipping symlinks" ; \
+			fi ; \
+		else \
+			echo "Not building binaries, skipping symlinks" ; \
+		fi ; \
+	)
+endef
+
+define GoPackage/Build/Compile
+	( \
+		cd $(GO_PKG_BUILD_DIR) ; \
+		export GOPATH=$(GO_PKG_BUILD_DIR) \
+			GOCACHE=$(GO_PKG_CACHE_DIR) \
+			GOTMPDIR=$(GO_PKG_TMP_DIR) \
+			GOROOT_FINAL=$(GO_TARGET_ROOT) \
+			CC=$(TARGET_CC) \
+			CXX=$(TARGET_CXX) \
+			$(call GoPackage/Environment) ; \
+		\
+		targets=$$$$(go list $(GO_PKG_BUILD_PKG)) ; \
+		for pattern in $(GO_PKG_EXCLUDES); do \
+			targets=$$$$(echo "$$$$targets" | grep -v "$$$$pattern") ; \
+		done ; \
+		\
+		if [ "$(GO_PKG_GO_GENERATE)" = 1 ]; then \
+			go generate -v $$$$targets ; \
+		fi ; \
+		\
+		if [ "$(GO_PKG_SOURCE_ONLY)" != 1 ]; then \
+			case $(GO_ARCH) in \
+			arm)         installsuffix="-installsuffix v$(GO_ARM)" ;; \
+			mips|mipsle) installsuffix="-installsuffix $(GO_MIPS)" ;; \
+			esac ; \
+			trimpath="all=-trimpath=$(GO_PKG_BUILD_DIR)" ; \
+			ldflags="all=-linkmode external -extldflags '$(TARGET_LDFLAGS)'" ; \
+			go install $$$$installsuffix -gcflags "$$$$trimpath" -asmflags "$$$$trimpath" -ldflags "$$$$ldflags" -v $$$$targets ; \
+			retval=$$$$? ; \
+			\
+			if [ "$$$$retval" -eq 0 ] && [ -z "$(call GoPackage/has_binaries)" ]; then \
+				echo "No binaries were generated, consider adding GO_PKG_SOURCE_ONLY:=1 to Makefile" ; \
+			fi ; \
+		fi ; \
+		exit $$$$retval ; \
+	)
+endef
+
+define GoPackage/Build/InstallDev
+	$(call GoPackage/Package/Install/Src,$(1))
+endef
+
+define GoPackage/Package/Install/Bin
+	if [ -n "$(call GoPackage/has_binaries)" ]; then \
+		$(INSTALL_DIR) $(1)/usr/bin ; \
+		$(INSTALL_BIN) $(GO_PKG_BUILD_BIN_DIR)/* $(1)/usr/bin/ ; \
+	fi
+endef
+
+define GoPackage/Package/Install/Src
+	dir=$$$$(dirname $(GO_PKG)) ; \
+	$(INSTALL_DIR) $(1)$(GO_PKG_PATH)/src/$$$$dir ; \
+	$(CP) $(GO_PKG_BUILD_DIR)/src/$(GO_PKG) $(1)$(GO_PKG_PATH)/src/$$$$dir/
+endef
+
+define GoPackage/Package/Install
+	$(call GoPackage/Package/Install/Bin,$(1))
+	$(call GoPackage/Package/Install/Src,$(1))
+endef
+
+
+ifneq ($(GO_PKG),)
+  Build/Configure=$(call GoPackage/Build/Configure)
+  Build/Compile=$(call GoPackage/Build/Compile)
+  Build/InstallDev=$(call GoPackage/Build/InstallDev,$(1))
+endif
+
+define GoPackage
+  ifndef Package/$(1)/install
+    Package/$(1)/install=$$(call GoPackage/Package/Install,$$(1))
+  endif
+endef
+
+define GoBinPackage
+  ifndef Package/$(1)/install
+    Package/$(1)/install=$$(call GoPackage/Package/Install/Bin,$$(1))
+  endif
+endef
+
+define GoSrcPackage
+  ifndef Package/$(1)/install
+    Package/$(1)/install=$$(call GoPackage/Package/Install/Src,$$(1))
+  endif
+endef
diff --git a/lang/golang/golang-values.mk b/lang/golang/golang-values.mk
new file mode 100644
index 000000000..13763e364
--- /dev/null
+++ b/lang/golang/golang-values.mk
@@ -0,0 +1,72 @@
+#
+# Copyright (C) 2018 Jeffery To
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+ifeq ($(origin GO_INCLUDE_DIR),undefined)
+  GO_INCLUDE_DIR:=$(dir $(lastword $(MAKEFILE_LIST)))
+endif
+
+include $(GO_INCLUDE_DIR)/golang-version.mk
+
+
+unexport \
+  GOARCH GOBIN GOCACHE GODEBUG GOHOSTARCH GOOS GOPATH GORACE GOROOT GOTMPDIR GCCGO \
+  CGO_ENABLED \
+  CGO_CFLAGS CGO_CFLAGS_ALLOW CGO_CFLAGS_DISALLOW \
+  CGO_CPPFLAGS CGO_CPPFLAGS_ALLOW CGO_CPPFLAGS_DISALLOW \
+  CGO_CXXFLAGS CGO_CXXFLAGS_ALLOW CGO_CXXFLAGS_DISALLOW \
+  CGO_FFLAGS CGO_FFLAGS_ALLOW CGO_FFLAGS_DISALLOW \
+  CGO_LDFLAGS CGO_LDFLAGS_ALLOW CGO_LDFLAGS_DISALLOW \
+  GOARM GO386 GOMIPS \
+  GOROOT_FINAL GO_EXTLINK_ENABLED GIT_ALLOW_PROTOCOL \
+  CC_FOR_TARGET CXX_FOR_TARGET GO_DISTFLAGS GO_GCFLAGS GO_LDFLAGS GOBUILDTIMELOGFILE GOROOT_BOOTSTRAP \
+  BOOT_GO_GCFLAGS GOEXPERIMENT GOBOOTSTRAP_TOOLEXEC
+  # there are more magic environment variables to track down, but ain't nobody got time for that
+
+go_arch=$(subst \
+  aarch64,arm64,$(subst \
+  i386,386,$(subst \
+  mipsel,mipsle,$(subst \
+  mips64el,mips64le,$(subst \
+  powerpc64,ppc64,$(subst \
+  x86_64,amd64,$(1)))))))
+
+GO_OS:=linux
+GO_ARCH:=$(call go_arch,$(ARCH))
+GO_OS_ARCH:=$(GO_OS)_$(GO_ARCH)
+
+GO_HOST_OS:=$(call tolower,$(HOST_OS))
+GO_HOST_ARCH:=$(call go_arch,$(subst \
+  armv6l,arm,$(subst \
+  armv7l,arm,$(subst \
+  i486,i386,$(subst \
+  i586,i386,$(subst \
+  i686,i386,$(HOST_ARCH)))))))
+GO_HOST_OS_ARCH:=$(GO_HOST_OS)_$(GO_HOST_ARCH)
+
+GO_HOST_TARGET_SAME:=$(if $(and $(findstring $(GO_OS_ARCH),$(GO_HOST_OS_ARCH)),$(findstring $(GO_HOST_OS_ARCH),$(GO_OS_ARCH))),1)
+GO_HOST_TARGET_DIFFERENT:=$(if $(GO_HOST_TARGET_SAME),,1)
+
+# ensure binaries can run on older CPUs
+GO_386:=387
+
+GO_ARM:=$(if $(CONFIG_arm_v7),7,$(if $(CONFIG_arm_v6),6,$(if $(findstring $(GO_ARCH),arm),5,)))
+
+GO_MIPS:=$(if $(filter $(GO_ARCH),mips mipsle),$(if $(CONFIG_HAS_FPU),hardfloat,softfloat),)
+
+# -fno-plt: causes "unexpected GOT reloc for non-dynamic symbol" errors
+# -mips32r2: conflicts with -march=mips32 set by go
+GO_CFLAGS_TO_REMOVE:=$(if \
+$(filter $(GO_ARCH),386),-fno-plt,$(if \
+$(filter $(GO_ARCH),mips mipsle),-mips32r2,))
+
+# mips64 / mips64el doesn't have softfloat support yet
+# https://github.com/golang/go/issues/14635
+GO_ARCH_DEPENDS:=@(aarch64||arm||i386||i686||mips||mipsel||powerpc64||x86_64)
+
+GO_TARGET_PREFIX:=/usr
+GO_TARGET_VERSION_ID:=$(GO_VERSION_MAJOR_MINOR)
+GO_TARGET_ROOT:=$(GO_TARGET_PREFIX)/lib/go-$(GO_TARGET_VERSION_ID)
diff --git a/lang/golang/golang-version.mk b/lang/golang/golang-version.mk
new file mode 100644
index 000000000..01b429508
--- /dev/null
+++ b/lang/golang/golang-version.mk
@@ -0,0 +1,14 @@
+#
+# Copyright (C) 2018 Jeffery To
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+ifeq ($(origin GO_INCLUDE_DIR),undefined)
+  GO_INCLUDE_DIR:=$(dir $(lastword $(MAKEFILE_LIST)))
+endif
+
+
+GO_VERSION_MAJOR_MINOR:=1.10
+GO_VERSION_PATCH:=
diff --git a/lang/golang/golang/Makefile b/lang/golang/golang/Makefile
new file mode 100644
index 000000000..081701267
--- /dev/null
+++ b/lang/golang/golang/Makefile
@@ -0,0 +1,277 @@
+#
+# Copyright (C) 2018 Jeffery To
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+
+include $(TOPDIR)/rules.mk
+include ../golang-version.mk
+
+PKG_NAME:=golang
+PKG_VERSION:=$(GO_VERSION_MAJOR_MINOR)$(if $(GO_VERSION_PATCH),.$(GO_VERSION_PATCH))
+PKG_RELEASE:=1
+
+PKG_SOURCE:=go$(PKG_VERSION).src.tar.gz
+PKG_SOURCE_URL:=https://golang.org/dl/
+PKG_HASH:=f3de49289405fda5fd1483a8fe6bd2fa5469e005fd567df64485c4fa000c7f24
+
+PKG_LICENSE:=BSD-3-Clause
+PKG_LICENSE_FILES:=LICENSE
+PKG_MAINTAINER:=Jeffery To <jeffery.to@gmail.com>
+
+PKG_BUILD_DEPENDS:=golang/host
+PKG_BUILD_DIR:=$(BUILD_DIR)/go-$(PKG_VERSION)
+PKG_BUILD_PARALLEL:=1
+PKG_USE_MIPS16:=0
+
+PKG_GO_WORK_DIR:=$(PKG_BUILD_DIR)/.go_work
+PKG_GO_HOST_CACHE_DIR:=$(PKG_GO_WORK_DIR)/host_cache
+PKG_GO_TARGET_CACHE_DIR:=$(PKG_GO_WORK_DIR)/target_cache
+PKG_GO_TMP_DIR:=$(PKG_GO_WORK_DIR)/tmp
+
+HOST_BUILD_DIR:=$(BUILD_DIR_HOST)/go-$(PKG_VERSION)
+HOST_BUILD_PARALLEL:=1
+
+HOST_GO_PREFIX:=$(STAGING_DIR_HOSTPKG)
+HOST_GO_VERSION_ID:=cross
+HOST_GO_ROOT:=$(HOST_GO_PREFIX)/lib/go-$(HOST_GO_VERSION_ID)
+
+HOST_GO_VALID_OS_ARCH:= \
+                                android_arm \
+  darwin_386   darwin_amd64     darwin_arm   darwin_arm64 \
+               dragonfly_amd64 \
+  freebsd_386  freebsd_amd64    freebsd_arm \
+  linux_386    linux_amd64      linux_arm    linux_arm64 \
+  netbsd_386   netbsd_amd64     netbsd_arm \
+  openbsd_386  openbsd_amd64    openbsd_arm \
+  plan9_386    plan9_amd64 \
+               solaris_amd64 \
+  windows_386  windows_amd64 \
+  \
+  linux_ppc64 linux_ppc64le linux_mips linux_mipsle linux_mips64 linux_mips64le
+
+BOOTSTRAP_SOURCE_PROTO:=git
+BOOTSTRAP_SOURCE_URL:=https://go.googlesource.com/go
+BOOTSTRAP_SOURCE_VERSION:=4d5426a570c2820c5894a61b52e3dc147e4e7925
+BOOTSTRAP_SOURCE_DATE:=20170926
+BOOTSTRAP_MIRROR_HASH:=a3e26ee7c96486c841d29cbea3bf548ce2d999b9235275091cbe60ae6efa4cb1
+
+BOOTSTRAP_VERSION:=$(BOOTSTRAP_SOURCE_DATE)-$(call version_abbrev,$(BOOTSTRAP_SOURCE_VERSION))
+BOOTSTRAP_SOURCE_SUBDIR:=golang-bootstrap-$(BOOTSTRAP_VERSION)
+BOOTSTRAP_SOURCE:=$(BOOTSTRAP_SOURCE_SUBDIR).tar.xz
+
+BOOTSTRAP_BUILD_DIR:=$(HOST_BUILD_DIR)/.go_bootstrap
+
+BOOTSTRAP_GO_VALID_OS_ARCH:= \
+  darwin_386     darwin_amd64 \
+  dragonfly_386  dragonfly_amd64 \
+  freebsd_386    freebsd_amd64    freebsd_arm \
+  linux_386      linux_amd64      linux_arm \
+  netbsd_386     netbsd_amd64     netbsd_arm \
+  openbsd_386    openbsd_amd64 \
+  plan9_386      plan9_amd64 \
+                 solaris_amd64 \
+  windows_386    windows_amd64
+
+include $(INCLUDE_DIR)/host-build.mk
+include $(INCLUDE_DIR)/package.mk
+include ../golang-compiler.mk
+include ../golang-package.mk
+
+PKG_UNPACK:=$(HOST_TAR) -C $(PKG_BUILD_DIR) --strip-components=1 -xzf $(DL_DIR)/$(PKG_SOURCE)
+HOST_UNPACK:=$(HOST_TAR) -C $(HOST_BUILD_DIR) --strip-components=1 -xzf $(DL_DIR)/$(PKG_SOURCE)
+BOOTSTRAP_UNPACK:=$(HOST_TAR) -C $(BOOTSTRAP_BUILD_DIR) --strip-components=1 -xJf $(DL_DIR)/$(BOOTSTRAP_SOURCE)
+
+# don't strip ELF executables in test data (and go itself)
+RSTRIP:=:
+STRIP:=:
+
+define Package/golang/Default
+$(call GoPackage/GoSubMenu)
+  TITLE:=Go programming language
+  URL:=https://golang.org/
+  DEPENDS:=$(GO_ARCH_DEPENDS)
+endef
+
+define Package/golang/Default/description
+The Go programming language is an open source project to make
+programmers more productive.
+
+Go is expressive, concise, clean, and efficient. Its concurrency
+mechanisms make it easy to write programs that get the most out of
+multicore and networked machines, while its novel type system enables
+flexible and modular program construction. Go compiles quickly to
+machine code yet has the convenience of garbage collection and the power
+of run-time reflection. It's a fast, statically typed, compiled language
+that feels like a dynamically typed, interpreted language.
+endef
+
+# go tool requires source present:
+# https://github.com/golang/go/issues/4635
+define Package/golang
+$(call Package/golang/Default)
+  TITLE+= (compiler)
+  DEPENDS+= +golang-src
+endef
+
+define Package/golang/description
+$(call Package/golang/Default/description)
+
+This package provides an assembler, compiler, linker, and compiled
+libraries for the Go programming language.
+endef
+
+define Package/golang-doc
+$(call Package/golang/Default)
+  TITLE+= (documentation)
+endef
+
+define Package/golang-doc/description
+$(call Package/golang/Default/description)
+
+This package provides the documentation for the Go programming language.
+endef
+
+define Package/golang-src
+$(call Package/golang/Default)
+  TITLE+= (source files)
+endef
+
+define Package/golang-src/description
+$(call Package/golang/Default/description)
+
+This package provides the Go programming language source files needed
+for cross-compilation.
+endef
+
+define Download/golang-bootstrap
+  FILE:=$(BOOTSTRAP_SOURCE)
+  URL:=$(BOOTSTRAP_SOURCE_URL)
+  SUBDIR:=$(BOOTSTRAP_SOURCE_SUBDIR)
+  PROTO:=$(BOOTSTRAP_SOURCE_PROTO)
+  MIRROR_HASH:=$(BOOTSTRAP_MIRROR_HASH)
+  VERSION:=$(BOOTSTRAP_SOURCE_VERSION)
+endef
+$(eval $(call Download,golang-bootstrap))
+
+$(eval $(call GoCompiler/AddProfile,Bootstrap,$(BOOTSTRAP_BUILD_DIR),,bootstrap,$(GO_HOST_OS_ARCH)))
+$(eval $(call GoCompiler/AddProfile,Host,$(HOST_BUILD_DIR),$(HOST_GO_PREFIX),$(HOST_GO_VERSION_ID),$(GO_HOST_OS_ARCH)))
+$(eval $(call GoCompiler/AddProfile,Package,$(PKG_BUILD_DIR),$(GO_TARGET_PREFIX),$(GO_TARGET_VERSION_ID),$(GO_OS_ARCH)))
+
+define Host/Prepare
+	$(call Host/Prepare/Default)
+	mkdir -p $(BOOTSTRAP_BUILD_DIR)
+	$(BOOTSTRAP_UNPACK)
+endef
+
+define Host/Compile
+	$(call GoCompiler/Bootstrap/CheckHost,$(BOOTSTRAP_GO_VALID_OS_ARCH))
+	$(call GoCompiler/Host/CheckHost,$(HOST_GO_VALID_OS_ARCH))
+
+	$(call GoCompiler/Bootstrap/Make, \
+		CC=$(HOSTCC_NOCACHE) \
+		CXX=$(HOSTCXX_NOCACHE) \
+	)
+
+	$(call GoCompiler/Host/Make, \
+		GOROOT_BOOTSTRAP=$(BOOTSTRAP_BUILD_DIR) \
+		CC=$(HOSTCC_NOCACHE) \
+		CXX=$(HOSTCXX_NOCACHE) \
+	)
+endef
+
+# if host and target os/arch are the same,
+# when go compiles a program, it will use the host std lib
+# so remove it now and force go to rebuild std for target later
+define Host/Install
+	$(call GoCompiler/Host/Install/Bin,)
+	$(call GoCompiler/Host/Install/Src,)
+
+	$(call GoCompiler/Host/Install/BinLinks,)
+
+	rm -rf $(HOST_GO_ROOT)/pkg/$(GO_HOST_OS_ARCH)
+
+	$(INSTALL_DIR) $(HOST_GO_ROOT)/openwrt
+	$(INSTALL_BIN) ./files/go-gcc-helper $(HOST_GO_ROOT)/openwrt/
+	$(LN) go-gcc-helper $(HOST_GO_ROOT)/openwrt/gcc
+	$(LN) go-gcc-helper $(HOST_GO_ROOT)/openwrt/g++
+endef
+
+define Host/Uninstall
+	rm -rf $(HOST_GO_ROOT)/openwrt
+
+	$(call GoCompiler/Host/Uninstall/BinLinks,)
+
+	$(call GoCompiler/Host/Uninstall,)
+endef
+
+define Build/Compile
+	mkdir -p \
+		$(PKG_GO_HOST_CACHE_DIR) \
+		$(PKG_GO_TARGET_CACHE_DIR) \
+		$(PKG_GO_TMP_DIR)
+
+	@echo "Building target Go first stage"
+
+	$(call GoCompiler/Package/Make, \
+		GOROOT_BOOTSTRAP=$(HOST_GO_ROOT) \
+		GOCACHE=$(PKG_GO_HOST_CACHE_DIR) \
+		GOTMPDIR=$(PKG_GO_TMP_DIR) \
+		GO_GCC_HELPER_CC="$(HOSTCC)" \
+		GO_GCC_HELPER_CXX="$(HOSTCXX)" \
+		GO_GCC_HELPER_PATH=$$$$PATH \
+		CC=gcc \
+		CXX=g++ \
+		PKG_CONFIG=pkg-config \
+		PATH=$(HOST_GO_ROOT)/openwrt:$$$$PATH \
+	)
+
+	@echo "Building target Go second stage"
+
+	( \
+		cd $(PKG_BUILD_DIR)/bin ; \
+		$(CP) go go-host ; \
+		GOROOT_FINAL=$(GO_TARGET_ROOT) \
+		GOCACHE=$(PKG_GO_TARGET_CACHE_DIR) \
+		GOTMPDIR=$(PKG_GO_TMP_DIR) \
+		GO_GCC_HELPER_CC="$(TARGET_CC)" \
+		GO_GCC_HELPER_CXX="$(TARGET_CXX)" \
+		GO_GCC_HELPER_PATH=$$$$PATH \
+		CC=gcc \
+		CXX=g++ \
+		PKG_CONFIG=pkg-config \
+		PATH=$(HOST_GO_ROOT)/openwrt:$$$$PATH \
+		$(call GoPackage/Environment) \
+		./go-host install -a -v std cmd ; \
+		retval=$$$$? ; \
+		rm -f go-host ; \
+		exit $$$$retval ; \
+	)
+endef
+
+define Package/golang/install
+	$(call GoCompiler/Package/Install/Bin,$(1)$(GO_TARGET_PREFIX))
+	$(call GoCompiler/Package/Install/BinLinks,$(1)$(GO_TARGET_PREFIX))
+endef
+
+define Package/golang-doc/install
+	$(call GoCompiler/Package/Install/Doc,$(1)$(GO_TARGET_PREFIX))
+endef
+
+define Package/golang-src/install
+	$(call GoCompiler/Package/Install/Src,$(1)$(GO_TARGET_PREFIX))
+endef
+
+# src/debug contains ELF executables as test data
+# and they reference these libraries
+# we need to call this in Package/$(1)/extra_provides
+# to pass CheckDependencies in include/package-ipkg.mk
+define Package/golang-src/extra_provides
+	echo 'libc.so.6'
+endef
+
+$(eval $(call HostBuild))
+$(eval $(call BuildPackage,golang))
+$(eval $(call BuildPackage,golang-doc))
+$(eval $(call BuildPackage,golang-src))
diff --git a/lang/golang/golang/files/go-gcc-helper b/lang/golang/golang/files/go-gcc-helper
new file mode 100644
index 000000000..3d3f8935d
--- /dev/null
+++ b/lang/golang/golang/files/go-gcc-helper
@@ -0,0 +1,23 @@
+#!/bin/sh
+
+me=go-gcc-helper
+name=$(basename $0)
+
+case $name in
+gcc)
+	cmd=$GO_GCC_HELPER_CC
+	;;
+g++)
+	cmd=$GO_GCC_HELPER_CXX
+	;;
+*)
+	echo "$me: unknown command \"$name\""
+	exit 1
+	;;
+esac
+
+export PATH="$GO_GCC_HELPER_PATH"
+
+echo "$me: running $cmd $@"
+
+$cmd "$@"