kumquat-buildroot/package/go/go.mk
Christian Stewart f7a2870dd1 go: explicitly disable modules to avoid unintended network lookup
Go "modules" refers to the dependency fetching, verification (hashing), and
version control system built into Go as of 1.11.

It is not desirable to have Go modules enabled in Buildroot in the normal case,
as Buildroot manages downloading the sources, and third party dependency
managers are typically not used.

In the absence of the GO111MODULE environment variable, the Go compiler will
correctly compile using the "vendor" version of dependencies downloaded by
Buildroot during the compilation process for Go-based packages.

However, if the user sets the GO111MODULE=on environment variable, the Go
compiler will download the Go dependencies for Buildroot packages, using the
modules system. This is potentially unintended behavior from user environment
variables.

This commit sets the GO111MODULE=off variable in the Go target and host
compilation environments, disabling Go modules support for Buildroot mainline
packages.

Signed-off-by: Christian Stewart <christian@paral.in>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2019-03-03 22:15:24 +01:00

110 lines
3.0 KiB
Makefile

################################################################################
#
# go
#
################################################################################
GO_VERSION = 1.11.5
GO_SITE = https://storage.googleapis.com/golang
GO_SOURCE = go$(GO_VERSION).src.tar.gz
GO_LICENSE = BSD-3-Clause
GO_LICENSE_FILES = LICENSE
ifeq ($(BR2_arm),y)
GO_GOARCH = arm
ifeq ($(BR2_ARM_CPU_ARMV5),y)
GO_GOARM = 5
else ifeq ($(BR2_ARM_CPU_ARMV6),y)
GO_GOARM = 6
else ifeq ($(BR2_ARM_CPU_ARMV7A),y)
GO_GOARM = 7
endif
else ifeq ($(BR2_aarch64),y)
GO_GOARCH = arm64
else ifeq ($(BR2_i386),y)
GO_GOARCH = 386
else ifeq ($(BR2_x86_64),y)
GO_GOARCH = amd64
else ifeq ($(BR2_powerpc64),y)
GO_GOARCH = ppc64
else ifeq ($(BR2_powerpc64le),y)
GO_GOARCH = ppc64le
else ifeq ($(BR2_mips64),y)
GO_GOARCH = mips64
else ifeq ($(BR2_mips64el),y)
GO_GOARCH = mips64le
endif
HOST_GO_DEPENDENCIES = host-go-bootstrap
HOST_GO_ROOT = $(HOST_DIR)/lib/go
# For the convienience of target packages.
HOST_GO_TOOLDIR = $(HOST_GO_ROOT)/pkg/tool/linux_$(GO_GOARCH)
HOST_GO_TARGET_ENV = \
GO111MODULE=off \
GOARCH=$(GO_GOARCH) \
GOROOT="$(HOST_GO_ROOT)" \
CC="$(TARGET_CC)" \
CXX="$(TARGET_CXX)" \
GOTOOLDIR="$(HOST_GO_TOOLDIR)"
# The go compiler's cgo support uses threads. If BR2_TOOLCHAIN_HAS_THREADS is
# set, build in cgo support for any go programs that may need it. Note that
# any target package needing cgo support must include
# 'depends on BR2_TOOLCHAIN_HAS_THREADS' in its config file.
ifeq ($(BR2_TOOLCHAIN_HAS_THREADS),y)
HOST_GO_CGO_ENABLED = 1
else
HOST_GO_CGO_ENABLED = 0
endif
# The go build system is not compatible with ccache, so use
# HOSTCC_NOCCACHE. See https://github.com/golang/go/issues/11685.
HOST_GO_MAKE_ENV = \
GO111MODULE=off \
GOROOT_BOOTSTRAP=$(HOST_GO_BOOTSTRAP_ROOT) \
GOROOT_FINAL=$(HOST_GO_ROOT) \
GOROOT="$(@D)" \
GOBIN="$(@D)/bin" \
GOARCH=$(GO_GOARCH) \
$(if $(GO_GOARM),GOARM=$(GO_GOARM)) \
GOOS=linux \
CC=$(HOSTCC_NOCCACHE) \
CXX=$(HOSTCXX_NOCCACHE) \
GO_ASSUME_CROSSCOMPILING=1
HOST_GO_TARGET_CC = \
CC_FOR_TARGET="$(TARGET_CC)" \
CXX_FOR_TARGET="$(TARGET_CXX)"
define HOST_GO_BUILD_CMDS
cd $(@D)/src && \
$(HOST_GO_MAKE_ENV) $(HOST_GO_TARGET_CC) CGO_ENABLED=$(HOST_GO_CGO_ENABLED) \
./make.bash $(if $(VERBOSE),-v)
endef
define HOST_GO_INSTALL_CMDS
$(INSTALL) -D -m 0755 $(@D)/bin/go $(HOST_GO_ROOT)/bin/go
$(INSTALL) -D -m 0755 $(@D)/bin/gofmt $(HOST_GO_ROOT)/bin/gofmt
ln -sf ../lib/go/bin/go $(HOST_DIR)/bin/
ln -sf ../lib/go/bin/gofmt $(HOST_DIR)/bin/
cp -a $(@D)/lib $(HOST_GO_ROOT)/
mkdir -p $(HOST_GO_ROOT)/pkg
cp -a $(@D)/pkg/include $(@D)/pkg/linux_* $(HOST_GO_ROOT)/pkg/
cp -a $(@D)/pkg/tool $(HOST_GO_ROOT)/pkg/
# There is a known issue which requires the go sources to be installed
# https://golang.org/issue/2775
cp -a $(@D)/src $(HOST_GO_ROOT)/
# Set all file timestamps to prevent the go compiler from rebuilding any
# built in packages when programs are built.
find $(HOST_GO_ROOT) -type f -exec touch -r $(@D)/bin/go {} \;
endef
$(eval $(host-generic-package))