103 lines
3.4 KiB
Makefile
103 lines
3.4 KiB
Makefile
#
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# Copyright (C) 2018 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 $(GO_INCLUDE_DIR)/golang-version.mk
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unexport \
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GOARCH GOBIN GOCACHE GODEBUG GOHOSTARCH GOOS GOPATH GORACE GOROOT GOTMPDIR GCCGO \
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CGO_ENABLED \
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CGO_CFLAGS CGO_CFLAGS_ALLOW CGO_CFLAGS_DISALLOW \
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CGO_CPPFLAGS CGO_CPPFLAGS_ALLOW CGO_CPPFLAGS_DISALLOW \
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CGO_CXXFLAGS CGO_CXXFLAGS_ALLOW CGO_CXXFLAGS_DISALLOW \
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CGO_FFLAGS CGO_FFLAGS_ALLOW CGO_FFLAGS_DISALLOW \
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CGO_LDFLAGS CGO_LDFLAGS_ALLOW CGO_LDFLAGS_DISALLOW \
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GOARM GO386 GOMIPS \
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GOROOT_FINAL GO_EXTLINK_ENABLED GIT_ALLOW_PROTOCOL \
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CC_FOR_TARGET CXX_FOR_TARGET GO_DISTFLAGS GO_GCFLAGS GO_LDFLAGS GOBUILDTIMELOGFILE GOROOT_BOOTSTRAP \
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BOOT_GO_GCFLAGS GOEXPERIMENT GOBOOTSTRAP_TOOLEXEC
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# there are more magic environment variables to track down, but ain't nobody got time for that
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go_arch=$(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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i486,i386,$(subst \
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i586,i386,$(subst \
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i686,i386,$(HOST_ARCH)))))))
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GO_HOST_OS_ARCH:=$(GO_HOST_OS)_$(GO_HOST_ARCH)
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GO_HOST_TARGET_SAME:=$(if $(and $(findstring $(GO_OS_ARCH),$(GO_HOST_OS_ARCH)),$(findstring $(GO_HOST_OS_ARCH),$(GO_OS_ARCH))),1)
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GO_HOST_TARGET_DIFFERENT:=$(if $(GO_HOST_TARGET_SAME),,1)
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# ensure binaries can run on older CPUs
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GO_386:=387
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ifeq ($(GO_ARCH),arm)
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GO_TARGET_FPU:=$(word 2,$(subst +,$(space),$(call qstrip,$(CONFIG_CPU_TYPE))))
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# FPU names from https://gcc.gnu.org/onlinedocs/gcc-8.3.0/gcc/ARM-Options.html#index-mfpu-1
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# see also https://github.com/gcc-mirror/gcc/blob/gcc-8_3_0-release/gcc/config/arm/arm-cpus.in
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#
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# Assumptions:
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#
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# * -d16 variants (16 instead of 32 double-precision registers) acceptable
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# Go doesn't appear to check the HWCAP_VFPv3D16 flag in
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# https://github.com/golang/go/blob/release-branch.go1.13/src/runtime/os_linux_arm.go
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#
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# * Double-precision required
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# Based on no evidence(!)
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# Excludes vfpv3xd, vfpv3xd-fp16, fpv4-sp-d16, fpv5-sp-d16
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GO_ARM_7_FPUS:= \
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vfpv3 vfpv3-fp16 vfpv3-d16 vfpv3-d16-fp16 neon neon-vfpv3 neon-fp16 \
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vfpv4 vfpv4-d16 neon-vfpv4 \
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fpv5-d16 fp-armv8 neon-fp-armv8 crypto-neon-fp-armv8
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GO_ARM_6_FPUS:=vfp vfpv2
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ifneq ($(filter $(GO_TARGET_FPU),$(GO_ARM_7_FPUS)),)
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GO_ARM:=7
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else ifneq ($(filter $(GO_TARGET_FPU),$(GO_ARM_6_FPUS)),)
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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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endif
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GO_MIPS:=$(if $(filter $(GO_ARCH),mips mipsle),$(if $(CONFIG_HAS_FPU),hardfloat,softfloat),)
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# -fno-plt: causes "unexpected GOT reloc for non-dynamic symbol" errors
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# -mips32r2: conflicts with -march=mips32 set by go
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GO_CFLAGS_TO_REMOVE:=$(if \
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$(filter $(GO_ARCH),386),-fno-plt,$(if \
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$(filter $(GO_ARCH),mips mipsle),-mips32r2,))
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# mips64 / mips64el doesn't have softfloat support yet
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# https://github.com/golang/go/issues/14635
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GO_ARCH_DEPENDS:=@(aarch64||arm||i386||i686||mips||mipsel||powerpc64||x86_64)
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GO_TARGET_PREFIX:=/usr
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GO_TARGET_VERSION_ID:=$(GO_VERSION_MAJOR_MINOR)
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GO_TARGET_ROOT:=$(GO_TARGET_PREFIX)/lib/go-$(GO_TARGET_VERSION_ID)
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