################################################################################
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#
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# go
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#
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################################################################################
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GO_VERSION = 1.9
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GO_SITE = https://storage.googleapis.com/golang
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GO_SOURCE = go$(GO_VERSION).src.tar.gz
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GO_LICENSE = BSD-3-Clause
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GO_LICENSE_FILES = LICENSE
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ifeq ($(BR2_arm),y)
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GO_GOARCH = arm
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ifeq ($(BR2_ARM_CPU_ARMV5),y)
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GO_GOARM = 5
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else ifeq ($(BR2_ARM_CPU_ARMV6),y)
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GO_GOARM = 6
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else ifeq ($(BR2_ARM_CPU_ARMV7A),y)
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GO_GOARM = 7
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endif
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else ifeq ($(BR2_aarch64),y)
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GO_GOARCH = arm64
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else ifeq ($(BR2_i386),y)
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GO_GOARCH = 386
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else ifeq ($(BR2_x86_64),y)
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GO_GOARCH = amd64
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else ifeq ($(BR2_powerpc64),y)
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GO_GOARCH = ppc64
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else ifeq ($(BR2_powerpc64le),y)
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GO_GOARCH = ppc64le
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else ifeq ($(BR2_mips64),y)
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GO_GOARCH = mips64
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else ifeq ($(BR2_mips64el),y)
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GO_GOARCH = mips64le
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endif
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HOST_GO_DEPENDENCIES = host-go-bootstrap
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HOST_GO_ROOT = $(HOST_DIR)/lib/go
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# For the convienience of target packages.
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HOST_GO_TOOLDIR = $(HOST_GO_ROOT)/pkg/tool/linux_$(GO_GOARCH)
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HOST_GO_TARGET_ENV = \
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GOARCH=$(GO_GOARCH) \
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GOROOT="$(HOST_GO_ROOT)" \
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CC="$(TARGET_CC)" \
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CXX="$(TARGET_CXX)" \
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GOTOOLDIR="$(HOST_GO_TOOLDIR)"
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# The go compiler's cgo support uses threads. If BR2_TOOLCHAIN_HAS_THREADS is
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# set, build in cgo support for any go programs that may need it. Note that
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# any target package needing cgo support must include
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# 'depends on BR2_TOOLCHAIN_HAS_THREADS' in its config file.
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ifeq ($(BR2_TOOLCHAIN_HAS_THREADS),y)
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HOST_GO_CGO_ENABLED = 1
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else
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HOST_GO_CGO_ENABLED = 0
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endif
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# The go build system doesn't have the notion of cross compiling, but just the
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# notion of architecture. When the host and target architectures are different
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# it expects to be given a target cross compiler in CC_FOR_TARGET. When the
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# architectures are the same it will use CC_FOR_TARGET for both host and target
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# compilation. To work around this limitation build and install a set of
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# compiler and tool binaries built with CC_FOR_TARGET set to the host compiler.
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# Also, the go build system is not compatible with ccache, so use
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# HOSTCC_NOCCACHE. See https://github.com/golang/go/issues/11685.
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HOST_GO_MAKE_ENV = \
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GOROOT_BOOTSTRAP=$(HOST_GO_BOOTSTRAP_ROOT) \
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GOROOT_FINAL=$(HOST_GO_ROOT) \
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GOROOT="$(@D)" \
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GOBIN="$(@D)/bin" \
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GOARCH=$(GO_GOARCH) \
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$(if $(GO_GOARM),GOARM=$(GO_GOARM)) \
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GOOS=linux \
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CC=$(HOSTCC_NOCCACHE) \
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CXX=$(HOSTCXX_NOCCACHE)
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HOST_GO_TARGET_CC = \
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CC_FOR_TARGET="$(TARGET_CC)" \
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CXX_FOR_TARGET="$(TARGET_CXX)"
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HOST_GO_HOST_CC = \
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CC_FOR_TARGET=$(HOSTCC_NOCCACHE) \
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CXX_FOR_TARGET=$(HOSTCXX_NOCCACHE)
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HOST_GO_TMP = $(@D)/host-go-tmp
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define HOST_GO_BUILD_CMDS
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cd $(@D)/src && \
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$(HOST_GO_MAKE_ENV) $(HOST_GO_HOST_CC) CGO_ENABLED=0 ./make.bash
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mkdir -p $(HOST_GO_TMP)
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mv $(@D)/pkg/tool $(HOST_GO_TMP)/
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mv $(@D)/bin/ $(HOST_GO_TMP)/
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cd $(@D)/src && \
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$(HOST_GO_MAKE_ENV) $(HOST_GO_TARGET_CC) CGO_ENABLED=$(HOST_GO_CGO_ENABLED) ./make.bash
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endef
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define HOST_GO_INSTALL_CMDS
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$(INSTALL) -D -m 0755 $(HOST_GO_TMP)/bin/go $(HOST_GO_ROOT)/bin/go
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$(INSTALL) -D -m 0755 $(HOST_GO_TMP)/bin/gofmt $(HOST_GO_ROOT)/bin/gofmt
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ln -sf ../lib/go/bin/go $(HOST_DIR)/bin/
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ln -sf ../lib/go/bin/gofmt $(HOST_DIR)/bin/
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cp -a $(@D)/lib $(HOST_GO_ROOT)/
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mkdir -p $(HOST_GO_ROOT)/pkg
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cp -a $(@D)/pkg/include $(@D)/pkg/linux_* $(HOST_GO_ROOT)/pkg/
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cp -a $(HOST_GO_TMP)/tool $(HOST_GO_ROOT)/pkg/
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# There is a known issue which requires the go sources to be installed
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# https://golang.org/issue/2775
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cp -a $(@D)/src $(HOST_GO_ROOT)/
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# Set all file timestamps to prevent the go compiler from rebuilding any
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# built in packages when programs are built.
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find $(HOST_GO_ROOT) -type f -exec touch -r $(HOST_GO_TMP)/bin/go {} \;
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endef
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$(eval $(host-generic-package))
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