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c377576734
This adds support to compile host and target Go as position-independent executables. Host Go will have PIE enabled if Go supports PIE on the host platform. Target Go will have PIE enabled if Go supports PIE on the target platform and CONFIG_PKG_ASLR_PIE is selected. Go 1.13 supports PIE for x86 and arm targets; mips support is in progress[1]. [1]: https://github.com/golang/go/issues/21222#issuecomment-542064462 Signed-off-by: Jeffery To <jeffery.to@gmail.com>
219 lines
4.5 KiB
Makefile
219 lines
4.5 KiB
Makefile
#
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# Copyright (C) 2018, 2020 Jeffery To
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#
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# This is free software, licensed under the GNU General Public License v2.
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# See /LICENSE for more information.
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#
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ifeq ($(origin GO_INCLUDE_DIR),undefined)
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GO_INCLUDE_DIR:=$(dir $(lastword $(MAKEFILE_LIST)))
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endif
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include $(GO_INCLUDE_DIR)/golang-version.mk
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# Unset environment variables
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# There are more magic variables to track down, but ain't nobody got time for that
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# From https://golang.org/cmd/go/#hdr-Environment_variables
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# General-purpose environment variables:
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unexport \
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GCCGO \
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GOARCH \
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GOBIN \
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GOCACHE \
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GODEBUG \
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GOENV \
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GOFLAGS \
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GOOS \
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GOPATH \
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GOROOT \
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GOTMPDIR
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# Unmodified:
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# GOPRIVATE
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# GOPROXY
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# GONOPROXY
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# GOSUMDB
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# GONOSUMDB
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# Environment variables for use with cgo:
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unexport \
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AR \
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CC \
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CGO_ENABLED \
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CGO_CFLAGS CGO_CFLAGS_ALLOW CGO_CFLAGS_DISALLOW \
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CGO_CPPFLAGS CGO_CPPFLAGS_ALLOW CGO_CPPFLAGS_DISALLOW \
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CGO_CXXFLAGS CGO_CXXFLAGS_ALLOW CGO_CXXFLAGS_DISALLOW \
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CGO_FFLAGS CGO_FFLAGS_ALLOW CGO_FFLAGS_DISALLOW \
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CGO_LDFLAGS CGO_LDFLAGS_ALLOW CGO_LDFLAGS_DISALLOW \
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CXX \
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FC
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# Unmodified:
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# PKG_CONFIG
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# Architecture-specific environment variables:
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unexport \
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GOARM \
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GO386 \
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GOMIPS \
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GOMIPS64 \
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GOWASM
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# Special-purpose environment variables:
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unexport \
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GCCGOTOOLDIR \
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GOROOT_FINAL \
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GO_EXTLINK_ENABLED
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# Unmodified:
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# GIT_ALLOW_PROTOCOL
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# From https://golang.org/cmd/go/#hdr-Module_support
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unexport \
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GO111MODULE
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# From https://golang.org/pkg/runtime/#hdr-Environment_Variables
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unexport \
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GOGC \
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GOMAXPROCS \
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GORACE \
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GOTRACEBACK
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# From https://golang.org/cmd/cgo/#hdr-Using_cgo_with_the_go_command
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unexport \
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CC_FOR_TARGET \
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CXX_FOR_TARGET
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# Todo:
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# CC_FOR_${GOOS}_${GOARCH}
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# CXX_FOR_${GOOS}_${GOARCH}
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# From https://golang.org/doc/install/source#environment
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unexport \
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GOHOSTOS \
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GOHOSTARCH \
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GOPPC64
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# From https://golang.org/src/make.bash
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unexport \
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GO_GCFLAGS \
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GO_LDFLAGS \
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GO_LDSO \
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GO_DISTFLAGS \
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GOBUILDTIMELOGFILE \
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GOROOT_BOOTSTRAP
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# From https://golang.org/doc/go1.9#parallel-compile
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unexport \
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GO19CONCURRENTCOMPILATION
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# From https://golang.org/src/cmd/dist/build.go
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unexport \
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BOOT_GO_GCFLAGS \
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BOOT_GO_LDFLAGS
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# From https://golang.org/src/cmd/dist/buildtool.go
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unexport \
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GOBOOTSTRAP_TOOLEXEC
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# From https://golang.org/src/cmd/internal/objabi/util.go
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unexport \
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GOEXPERIMENT
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# GOOS / GOARCH
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go_arch=$(subst \
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aarch64,arm64,$(subst \
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i386,386,$(subst \
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mipsel,mipsle,$(subst \
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mips64el,mips64le,$(subst \
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powerpc64,ppc64,$(subst \
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x86_64,amd64,$(1)))))))
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GO_OS:=linux
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GO_ARCH:=$(call go_arch,$(ARCH))
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GO_OS_ARCH:=$(GO_OS)_$(GO_ARCH)
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GO_HOST_OS:=$(call tolower,$(HOST_OS))
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GO_HOST_ARCH:=$(call go_arch,$(subst \
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armv6l,arm,$(subst \
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armv7l,arm,$(subst \
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i686,i386,$(HOST_ARCH)))))
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GO_HOST_OS_ARCH:=$(GO_HOST_OS)_$(GO_HOST_ARCH)
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ifeq ($(GO_OS_ARCH),$(GO_HOST_OS_ARCH))
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GO_HOST_TARGET_SAME:=1
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else
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GO_HOST_TARGET_DIFFERENT:=1
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endif
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ifeq ($(GO_ARCH),386)
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# ensure binaries can run on older CPUs
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GO_386:=387
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# -fno-plt: causes "unexpected GOT reloc for non-dynamic symbol" errors
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GO_CFLAGS_TO_REMOVE:=-fno-plt
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else ifeq ($(GO_ARCH),arm)
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ifeq ($(CONFIG_arm_v7),y)
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GO_ARM:=7
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else ifeq ($(CONFIG_arm_v6),y)
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GO_ARM:=6
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else
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GO_ARM:=5
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endif
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else ifneq ($(filter $(GO_ARCH),mips mipsle),)
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ifeq ($(CONFIG_HAS_FPU),y)
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GO_MIPS:=hardfloat
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else
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GO_MIPS:=softfloat
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endif
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# -mips32r2: conflicts with -march=mips32 set by go
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GO_CFLAGS_TO_REMOVE:=-mips32r2
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else ifneq ($(filter $(GO_ARCH),mips64 mips64le),)
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ifeq ($(CONFIG_HAS_FPU),y)
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GO_MIPS64:=hardfloat
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else
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GO_MIPS64:=softfloat
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endif
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endif
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# Target Go
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GO_ARCH_DEPENDS:=@(aarch64||arm||i386||i686||mips||mips64||mips64el||mipsel||powerpc64||x86_64)
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GO_TARGET_PREFIX:=/usr
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GO_TARGET_VERSION_ID:=$(GO_VERSION_MAJOR_MINOR)
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GO_TARGET_ROOT:=$(GO_TARGET_PREFIX)/lib/go-$(GO_TARGET_VERSION_ID)
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# ASLR/PIE
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GO_PIE_SUPPORTED_OS_ARCH:= \
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android_386 android_amd64 android_arm android_arm64 \
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linux_386 linux_amd64 linux_arm linux_arm64 \
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\
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darwin_amd64 \
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freebsd_amd64 \
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\
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aix_ppc64 \
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\
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linux_ppc64le linux_s390x
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go_pie_install_suffix=$(if $(filter $(1),aix_ppc64),,shared)
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ifneq ($(filter $(GO_HOST_OS_ARCH),$(GO_PIE_SUPPORTED_OS_ARCH)),)
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GO_HOST_PIE_SUPPORTED:=1
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GO_HOST_PIE_INSTALL_SUFFIX:=$(call go_pie_install_suffix,$(GO_HOST_OS_ARCH))
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endif
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ifneq ($(filter $(GO_OS_ARCH),$(GO_PIE_SUPPORTED_OS_ARCH)),)
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GO_TARGET_PIE_SUPPORTED:=1
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GO_TARGET_PIE_INSTALL_SUFFIX:=$(call go_pie_install_suffix,$(GO_OS_ARCH))
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endif
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