go: update go 1.9 -> go 1.10

* Patches and recipes reworked for go 1.10's significant
  changes to its bootstrap and build steps.

* Update go1.4 source tarball used for go-native
  bootstrapping to the version recommended
  in the current go documentation

* Remove test data from installed sources to eliminate
  some packaging QA warnings

* Set GOCACHE to 'off' to disable 1.10's build caching
  in the go recipes and bbclass

* Update go_do_compile to compile both static and
  dynamic objects dynamic linking is in use, since
  go1.10's build tool is pickier about this

Signed-off-by: Matt Madison <matt@madison.systems>
Signed-off-by: Ross Burton <ross.burton@intel.com>

29 files changed, 1177 insertions, 104 deletions

diff --git a/meta/recipes-devtools/go/go-1.10.inc b/meta/recipes-devtools/go/go-1.10.inc
new file mode 100644
index 0000000000..08d1ba6551
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.10.inc
@@ -0,0 +1,22 @@
+require go-common.inc
+
+GO_BASEVERSION = "1.10"
+FILESEXTRAPATHS_prepend := "${FILE_DIRNAME}/go-${GO_BASEVERSION}:"
+
+LIC_FILES_CHKSUM = "file://LICENSE;md5=5d4950ecb7b26d2c5e4e7b4e0dd74707"
+
+SRC_URI += "\
+    file://0001-allow-CC-and-CXX-to-have-multiple-words.patch \
+    file://0002-cmd-go-make-content-based-hash-generation-less-pedan.patch \
+    file://0003-allow-GOTOOLDIR-to-be-overridden-in-the-environment.patch \
+    file://0004-ld-add-soname-to-shareable-objects.patch \
+    file://0005-make.bash-override-CC-when-building-dist-and-go_boot.patch \
+    file://0006-cmd-dist-separate-host-and-target-builds.patch \
+    file://0007-cmd-go-make-GOROOT-precious-by-default.patch \
+    file://0008-cmd-internal-obj-arm64-fix-branch-too-far-with-TBZ-l.patch \
+"
+
+SRC_URI_append_libc-musl = " file://0009-ld-replace-glibc-dynamic-linker-with-musl.patch"
+
+SRC_URI[main.md5sum] = "07cbb9d0091b846c6aea40bf5bc0cea7"
+SRC_URI[main.sha256sum] = "f3de49289405fda5fd1483a8fe6bd2fa5469e005fd567df64485c4fa000c7f24"
diff --git a/meta/recipes-devtools/go/go-1.10/0001-allow-CC-and-CXX-to-have-multiple-words.patch b/meta/recipes-devtools/go/go-1.10/0001-allow-CC-and-CXX-to-have-multiple-words.patch
new file mode 100644
index 0000000000..3bb33b0146
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.10/0001-allow-CC-and-CXX-to-have-multiple-words.patch
@@ -0,0 +1,33 @@
+From 7a7de46129fa6859fb6311096eb9f54c53c7fe2f Mon Sep 17 00:00:00 2001
+From: Matt Madison <matt@madison.systems>
+Date: Mon, 19 Feb 2018 08:49:33 -0800
+Subject: [PATCH 1/9] allow CC and CXX to have multiple words
+
+Upstream-Status: Inappropriate [OE specific]
+
+Signed-off-by: Matt Madison <matt@madison.systems>
+---
+ src/cmd/go/internal/envcmd/env.go | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/cmd/go/internal/envcmd/env.go b/src/cmd/go/internal/envcmd/env.go
+index 603f7b5060..f891123f9c 100644
+--- a/src/cmd/go/internal/envcmd/env.go
++++ b/src/cmd/go/internal/envcmd/env.go
+@@ -82,11 +82,11 @@ func MkEnv() []cfg.EnvVar {
+ 
+ 	cc := cfg.DefaultCC(cfg.Goos, cfg.Goarch)
+ 	if env := strings.Fields(os.Getenv("CC")); len(env) > 0 {
+-		cc = env[0]
++		cc = strings.Join(env, " ")
+ 	}
+ 	cxx := cfg.DefaultCXX(cfg.Goos, cfg.Goarch)
+ 	if env := strings.Fields(os.Getenv("CXX")); len(env) > 0 {
+-		cxx = env[0]
++		cxx = strings.Join(env, " ")
+ 	}
+ 	env = append(env, cfg.EnvVar{Name: "CC", Value: cc})
+ 	env = append(env, cfg.EnvVar{Name: "CXX", Value: cxx})
+-- 
+2.14.1
+
diff --git a/meta/recipes-devtools/go/go-1.10/0002-cmd-go-make-content-based-hash-generation-less-pedan.patch b/meta/recipes-devtools/go/go-1.10/0002-cmd-go-make-content-based-hash-generation-less-pedan.patch
new file mode 100644
index 0000000000..74f37a99ef
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.10/0002-cmd-go-make-content-based-hash-generation-less-pedan.patch
@@ -0,0 +1,220 @@
+From 8b2feaee81d7a16adc59e61d06c1e7314d3a5408 Mon Sep 17 00:00:00 2001
+From: Matt Madison <matt@madison.systems>
+Date: Mon, 19 Feb 2018 08:50:59 -0800
+Subject: [PATCH 2/9] cmd/go: make content-based hash generation less pedantic
+
+Go 1.10's build tool now uses content-based hashes to
+determine when something should be built or re-built.
+This same mechanism is used to maintain a built-artifact
+cache for speeding up builds.
+
+However, the hashes it generates include information that
+doesn't work well with OE, nor with using a shared runtime
+library.
+
+First, it embeds path names to source files, unless
+building within GOROOT.  This prevents the building
+of a package in GOPATH for later staging into GOROOT.
+
+This patch adds support for the environment variable
+GOPATH_OMIT_IN_ACTIONID.  If present, path name
+embedding is disabled.
+
+Second, if cgo is enabled, the build ID for cgo-related
+packages will include the current value of the environment
+variables for invoking the compiler (CC, CXX, FC) and
+any CGO_xxFLAGS variables.  Only if the settings used
+during a compilation exactly match, character for character,
+the values used for compiling runtime/cgo or any other
+cgo-enabled package being imported, will the tool
+decide that the imported package is up-to-date.
+
+This is done to help ensure correctness, but is overly
+simplistic and effectively prevents the reuse of built
+artifacts that use cgo (or shared runtime, which includes
+runtime/cgo).
+
+This patch filters out all compiler flags except those
+beginning with '-m'.  The default behavior can be restored
+by setting the CGO_PEDANTIC environment variable.
+
+Upstream-Status: Inappropriate [OE specific]
+
+Signed-off-by: Matt Madison <matt@madison.systems>
+---
+ src/cmd/go/internal/envcmd/env.go |  2 +-
+ src/cmd/go/internal/work/exec.go  | 63 ++++++++++++++++++++++++++++-----------
+ 2 files changed, 46 insertions(+), 19 deletions(-)
+
+diff --git a/src/cmd/go/internal/envcmd/env.go b/src/cmd/go/internal/envcmd/env.go
+index f891123f9c..ebacfbfdbc 100644
+--- a/src/cmd/go/internal/envcmd/env.go
++++ b/src/cmd/go/internal/envcmd/env.go
+@@ -113,7 +113,7 @@ func findEnv(env []cfg.EnvVar, name string) string {
+ func ExtraEnvVars() []cfg.EnvVar {
+ 	var b work.Builder
+ 	b.Init()
+-	cppflags, cflags, cxxflags, fflags, ldflags, err := b.CFlags(&load.Package{})
++	cppflags, cflags, cxxflags, fflags, ldflags, err := b.CFlags(&load.Package{}, false)
+ 	if err != nil {
+ 		// Should not happen - b.CFlags was given an empty package.
+ 		fmt.Fprintf(os.Stderr, "go: invalid cflags: %v\n", err)
+diff --git a/src/cmd/go/internal/work/exec.go b/src/cmd/go/internal/work/exec.go
+index c4c1500eb2..b0f6b45647 100644
+--- a/src/cmd/go/internal/work/exec.go
++++ b/src/cmd/go/internal/work/exec.go
+@@ -173,6 +173,8 @@ func (b *Builder) Do(root *Action) {
+ 	wg.Wait()
+ }
+ 
++var omitGopath = os.Getenv("GOPATH_OMIT_IN_ACTIONID") != ""
++
+ // buildActionID computes the action ID for a build action.
+ func (b *Builder) buildActionID(a *Action) cache.ActionID {
+ 	p := a.Package
+@@ -189,7 +191,7 @@ func (b *Builder) buildActionID(a *Action) cache.ActionID {
+ 	// but it does not hide the exact value of $GOPATH.
+ 	// Include the full dir in that case.
+ 	// Assume b.WorkDir is being trimmed properly.
+-	if !p.Goroot && !strings.HasPrefix(p.Dir, b.WorkDir) {
++	if !p.Goroot && !omitGopath && !strings.HasPrefix(p.Dir, b.WorkDir) {
+ 		fmt.Fprintf(h, "dir %s\n", p.Dir)
+ 	}
+ 	fmt.Fprintf(h, "goos %s goarch %s\n", cfg.Goos, cfg.Goarch)
+@@ -197,13 +199,13 @@ func (b *Builder) buildActionID(a *Action) cache.ActionID {
+ 	fmt.Fprintf(h, "omitdebug %v standard %v local %v prefix %q\n", p.Internal.OmitDebug, p.Standard, p.Internal.Local, p.Internal.LocalPrefix)
+ 	if len(p.CgoFiles)+len(p.SwigFiles) > 0 {
+ 		fmt.Fprintf(h, "cgo %q\n", b.toolID("cgo"))
+-		cppflags, cflags, cxxflags, fflags, _, _ := b.CFlags(p)
+-		fmt.Fprintf(h, "CC=%q %q %q\n", b.ccExe(), cppflags, cflags)
++		cppflags, cflags, cxxflags, fflags, _, _ := b.CFlags(p, true)
++		fmt.Fprintf(h, "CC=%q %q %q\n", b.ccExe(true), cppflags, cflags)
+ 		if len(p.CXXFiles)+len(p.SwigFiles) > 0 {
+-			fmt.Fprintf(h, "CXX=%q %q\n", b.cxxExe(), cxxflags)
++			fmt.Fprintf(h, "CXX=%q %q\n", b.cxxExe(true), cxxflags)
+ 		}
+ 		if len(p.FFiles) > 0 {
+-			fmt.Fprintf(h, "FC=%q %q\n", b.fcExe(), fflags)
++			fmt.Fprintf(h, "FC=%q %q\n", b.fcExe(true), fflags)
+ 		}
+ 		// TODO(rsc): Should we include the SWIG version or Fortran/GCC/G++/Objective-C compiler versions?
+ 	}
+@@ -1731,33 +1733,33 @@ var (
+ // gccCmd returns a gcc command line prefix
+ // defaultCC is defined in zdefaultcc.go, written by cmd/dist.
+ func (b *Builder) GccCmd(incdir, workdir string) []string {
+-	return b.compilerCmd(b.ccExe(), incdir, workdir)
++	return b.compilerCmd(b.ccExe(false), incdir, workdir)
+ }
+ 
+ // gxxCmd returns a g++ command line prefix
+ // defaultCXX is defined in zdefaultcc.go, written by cmd/dist.
+ func (b *Builder) GxxCmd(incdir, workdir string) []string {
+-	return b.compilerCmd(b.cxxExe(), incdir, workdir)
++	return b.compilerCmd(b.cxxExe(false), incdir, workdir)
+ }
+ 
+ // gfortranCmd returns a gfortran command line prefix.
+ func (b *Builder) gfortranCmd(incdir, workdir string) []string {
+-	return b.compilerCmd(b.fcExe(), incdir, workdir)
++	return b.compilerCmd(b.fcExe(false), incdir, workdir)
+ }
+ 
+ // ccExe returns the CC compiler setting without all the extra flags we add implicitly.
+-func (b *Builder) ccExe() []string {
+-	return b.compilerExe(origCC, cfg.DefaultCC(cfg.Goos, cfg.Goarch))
++func (b *Builder) ccExe(filtered bool) []string {
++	return b.compilerExe(origCC, cfg.DefaultCC(cfg.Goos, cfg.Goarch), filtered)
+ }
+ 
+ // cxxExe returns the CXX compiler setting without all the extra flags we add implicitly.
+-func (b *Builder) cxxExe() []string {
+-	return b.compilerExe(origCXX, cfg.DefaultCXX(cfg.Goos, cfg.Goarch))
++func (b *Builder) cxxExe(filtered bool) []string {
++	return b.compilerExe(origCXX, cfg.DefaultCXX(cfg.Goos, cfg.Goarch), filtered)
+ }
+ 
+ // fcExe returns the FC compiler setting without all the extra flags we add implicitly.
+-func (b *Builder) fcExe() []string {
+-	return b.compilerExe(os.Getenv("FC"), "gfortran")
++func (b *Builder) fcExe(filtered bool) []string {
++	return b.compilerExe(os.Getenv("FC"), "gfortran", filtered)
+ }
+ 
+ // compilerExe returns the compiler to use given an
+@@ -1766,11 +1768,14 @@ func (b *Builder) fcExe() []string {
+ // of the compiler but can have additional arguments if they
+ // were present in the environment value.
+ // For example if CC="gcc -DGOPHER" then the result is ["gcc", "-DGOPHER"].
+-func (b *Builder) compilerExe(envValue string, def string) []string {
++func (b *Builder) compilerExe(envValue string, def string, filtered bool) []string {
+ 	compiler := strings.Fields(envValue)
+ 	if len(compiler) == 0 {
+ 		compiler = []string{def}
+ 	}
++	if filtered {
++		return append(compiler[0:1], filterCompilerFlags(compiler[1:])...)
++	}
+ 	return compiler
+ }
+ 
+@@ -1920,8 +1925,23 @@ func envList(key, def string) []string {
+ 	return strings.Fields(v)
+ }
+ 
++var filterFlags = os.Getenv("CGO_PEDANTIC") == ""
++
++func filterCompilerFlags(flags []string) []string {
++	var newflags []string
++	if !filterFlags {
++		return flags
++	}
++	for _, flag := range flags {
++		if strings.HasPrefix(flag, "-m") {
++			newflags = append(newflags, flag)
++		}
++	}
++	return newflags
++}
++
+ // CFlags returns the flags to use when invoking the C, C++ or Fortran compilers, or cgo.
+-func (b *Builder) CFlags(p *load.Package) (cppflags, cflags, cxxflags, fflags, ldflags []string, err error) {
++func (b *Builder) CFlags(p *load.Package, filtered bool) (cppflags, cflags, cxxflags, fflags, ldflags []string, err error) {
+ 	defaults := "-g -O2"
+ 
+ 	if cppflags, err = buildFlags("CPPFLAGS", "", p.CgoCPPFLAGS, checkCompilerFlags); err != nil {
+@@ -1939,6 +1959,13 @@ func (b *Builder) CFlags(p *load.Package) (cppflags, cflags, cxxflags, fflags, l
+ 	if ldflags, err = buildFlags("LDFLAGS", defaults, p.CgoLDFLAGS, checkLinkerFlags); err != nil {
+ 		return
+ 	}
++	if filtered {
++		cppflags = filterCompilerFlags(cppflags)
++		cflags = filterCompilerFlags(cflags)
++		cxxflags = filterCompilerFlags(cxxflags)
++		fflags = filterCompilerFlags(fflags)
++		ldflags = filterCompilerFlags(ldflags)
++	}
+ 
+ 	return
+ }
+@@ -1954,7 +1981,7 @@ var cgoRe = regexp.MustCompile(`[/\\:]`)
+ 
+ func (b *Builder) cgo(a *Action, cgoExe, objdir string, pcCFLAGS, pcLDFLAGS, cgofiles, gccfiles, gxxfiles, mfiles, ffiles []string) (outGo, outObj []string, err error) {
+ 	p := a.Package
+-	cgoCPPFLAGS, cgoCFLAGS, cgoCXXFLAGS, cgoFFLAGS, cgoLDFLAGS, err := b.CFlags(p)
++	cgoCPPFLAGS, cgoCFLAGS, cgoCXXFLAGS, cgoFFLAGS, cgoLDFLAGS, err := b.CFlags(p, false)
+ 	if err != nil {
+ 		return nil, nil, err
+ 	}
+@@ -2306,7 +2333,7 @@ func (b *Builder) swigIntSize(objdir string) (intsize string, err error) {
+ 
+ // Run SWIG on one SWIG input file.
+ func (b *Builder) swigOne(a *Action, p *load.Package, file, objdir string, pcCFLAGS []string, cxx bool, intgosize string) (outGo, outC string, err error) {
+-	cgoCPPFLAGS, cgoCFLAGS, cgoCXXFLAGS, _, _, err := b.CFlags(p)
++	cgoCPPFLAGS, cgoCFLAGS, cgoCXXFLAGS, _, _, err := b.CFlags(p, false)
+ 	if err != nil {
+ 		return "", "", err
+ 	}
+-- 
+2.14.1
+
diff --git a/meta/recipes-devtools/go/go-1.10/0003-allow-GOTOOLDIR-to-be-overridden-in-the-environment.patch b/meta/recipes-devtools/go/go-1.10/0003-allow-GOTOOLDIR-to-be-overridden-in-the-environment.patch
new file mode 100644
index 0000000000..818fe66700
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.10/0003-allow-GOTOOLDIR-to-be-overridden-in-the-environment.patch
@@ -0,0 +1,64 @@
+From acd179b49f1fc8d6f7f69e569fb4a56039c725a1 Mon Sep 17 00:00:00 2001
+From: Matt Madison <matt@madison.systems>
+Date: Sat, 17 Feb 2018 05:24:20 -0800
+Subject: [PATCH 3/9] allow GOTOOLDIR to be overridden in the environment
+
+to allow for split host/target build roots
+
+Upstream-Status: Inappropriate [OE specific]
+
+Signed-off-by: Matt Madison <matt@madison.systems>
+---
+ src/cmd/dist/build.go          | 4 +++-
+ src/cmd/go/internal/cfg/cfg.go | 6 +++++-
+ src/go/build/build.go          | 2 +-
+ 3 files changed, 9 insertions(+), 3 deletions(-)
+
+diff --git a/src/cmd/dist/build.go b/src/cmd/dist/build.go
+index 49ed80033e..afc615b5c2 100644
+--- a/src/cmd/dist/build.go
++++ b/src/cmd/dist/build.go
+@@ -220,7 +220,9 @@ func xinit() {
+ 	workdir = xworkdir()
+ 	xatexit(rmworkdir)
+ 
+-	tooldir = pathf("%s/pkg/tool/%s_%s", goroot, gohostos, gohostarch)
++	if tooldir = os.Getenv("GOTOOLDIR"); tooldir == "" {
++		tooldir = pathf("%s/pkg/tool/%s_%s", goroot, gohostos, gohostarch)
++	}
+ }
+ 
+ // compilerEnv returns a map from "goos/goarch" to the
+diff --git a/src/cmd/go/internal/cfg/cfg.go b/src/cmd/go/internal/cfg/cfg.go
+index 1de4f0dc79..4f6010d660 100644
+--- a/src/cmd/go/internal/cfg/cfg.go
++++ b/src/cmd/go/internal/cfg/cfg.go
+@@ -96,7 +96,11 @@ func init() {
+ 	// as the tool directory does not move based on environment variables.
+ 	// This matches the initialization of ToolDir in go/build,
+ 	// except for using GOROOT rather than runtime.GOROOT().
+-	build.ToolDir = filepath.Join(GOROOT, "pkg/tool/"+runtime.GOOS+"_"+runtime.GOARCH)
++	if s := os.Getenv("GOTOOLDIR"); s != "" {
++		build.ToolDir = filepath.Clean(s)
++	} else {
++		build.ToolDir = filepath.Join(GOROOT, "pkg/tool/"+runtime.GOOS+"_"+runtime.GOARCH)
++	}
+ }
+ 
+ func findGOROOT() string {
+diff --git a/src/go/build/build.go b/src/go/build/build.go
+index 68fb423983..81b1b32270 100644
+--- a/src/go/build/build.go
++++ b/src/go/build/build.go
+@@ -1594,7 +1594,7 @@ func init() {
+ }
+ 
+ // ToolDir is the directory containing build tools.
+-var ToolDir = filepath.Join(runtime.GOROOT(), "pkg/tool/"+runtime.GOOS+"_"+runtime.GOARCH)
++var ToolDir = envOr("GOTOOLDIR", filepath.Join(runtime.GOROOT(), "pkg/tool/"+runtime.GOOS+"_"+runtime.GOARCH))
+ 
+ // IsLocalImport reports whether the import path is
+ // a local import path, like ".", "..", "./foo", or "../foo".
+-- 
+2.14.1
+
diff --git a/meta/recipes-devtools/go/go-1.10/0004-ld-add-soname-to-shareable-objects.patch b/meta/recipes-devtools/go/go-1.10/0004-ld-add-soname-to-shareable-objects.patch
new file mode 100644
index 0000000000..c23ca94290
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.10/0004-ld-add-soname-to-shareable-objects.patch
@@ -0,0 +1,47 @@
+From 85252f0bd8743223eb778edbe9fb31dff17a23d8 Mon Sep 17 00:00:00 2001
+From: Matt Madison <matt@madison.systems>
+Date: Sat, 17 Feb 2018 06:26:10 -0800
+Subject: [PATCH 4/9] ld: add soname to shareable objects
+
+so that OE's shared library dependency handling
+can find them.
+
+Upstream-Status: Inappropriate [OE specific]
+
+Signed-off-by: Matt Madison <matt@madison.systems>
+---
+ src/cmd/link/internal/ld/lib.go | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/src/cmd/link/internal/ld/lib.go b/src/cmd/link/internal/ld/lib.go
+index 6dcaf64122..11cbb8a8bb 100644
+--- a/src/cmd/link/internal/ld/lib.go
++++ b/src/cmd/link/internal/ld/lib.go
+@@ -1134,6 +1134,7 @@ func (ctxt *Link) hostlink() {
+ 				argv = append(argv, "-Wl,-z,relro")
+ 			}
+ 			argv = append(argv, "-shared")
++			argv = append(argv, fmt.Sprintf("-Wl,-soname,%s", filepath.Base(*flagOutfile)))
+ 			if ctxt.HeadType != objabi.Hwindows {
+ 				// Pass -z nodelete to mark the shared library as
+ 				// non-closeable: a dlclose will do nothing.
+@@ -1145,6 +1146,8 @@ func (ctxt *Link) hostlink() {
+ 			argv = append(argv, "-Wl,-z,relro")
+ 		}
+ 		argv = append(argv, "-shared")
++		argv = append(argv, fmt.Sprintf("-Wl,-soname,%s", filepath.Base(*flagOutfile)))
++
+ 	case BuildModePlugin:
+ 		if ctxt.HeadType == objabi.Hdarwin {
+ 			argv = append(argv, "-dynamiclib")
+@@ -1153,6 +1156,7 @@ func (ctxt *Link) hostlink() {
+ 				argv = append(argv, "-Wl,-z,relro")
+ 			}
+ 			argv = append(argv, "-shared")
++			argv = append(argv, fmt.Sprintf("-Wl,-soname,%s", filepath.Base(*flagOutfile)))
+ 		}
+ 	}
+ 
+-- 
+2.14.1
+
diff --git a/meta/recipes-devtools/go/go-1.10/0005-make.bash-override-CC-when-building-dist-and-go_boot.patch b/meta/recipes-devtools/go/go-1.10/0005-make.bash-override-CC-when-building-dist-and-go_boot.patch
new file mode 100644
index 0000000000..67a93939f5
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.10/0005-make.bash-override-CC-when-building-dist-and-go_boot.patch
@@ -0,0 +1,40 @@
+From 16124d84648f4dfdfa4738c5660b5400b30bf9da Mon Sep 17 00:00:00 2001
+From: Matt Madison <matt@madison.systems>
+Date: Sat, 17 Feb 2018 06:32:45 -0800
+Subject: [PATCH 5/9] make.bash: override CC when building dist and
+ go_bootstrap
+
+for handling OE cross-canadian builds.
+
+Upstream-Status: Inappropriate [OE specific]
+
+Signed-off-by: Matt Madison <matt@madison.systems>
+---
+ src/make.bash | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/src/make.bash b/src/make.bash
+index 93a5c43d11..3a63682bc4 100755
+--- a/src/make.bash
++++ b/src/make.bash
+@@ -162,7 +162,7 @@ if [ "$GOROOT_BOOTSTRAP" = "$GOROOT" ]; then
+ 	exit 1
+ fi
+ rm -f cmd/dist/dist
+-GOROOT="$GOROOT_BOOTSTRAP" GOOS="" GOARCH="" "$GOROOT_BOOTSTRAP/bin/go" build -o cmd/dist/dist ./cmd/dist
++CC="${BUILD_CC:-${CC}}" GOROOT="$GOROOT_BOOTSTRAP" GOOS="" GOARCH="" "$GOROOT_BOOTSTRAP/bin/go" build -o cmd/dist/dist ./cmd/dist
+ 
+ # -e doesn't propagate out of eval, so check success by hand.
+ eval $(./cmd/dist/dist env -p || echo FAIL=true)
+@@ -193,7 +193,7 @@ fi
+ # Run dist bootstrap to complete make.bash.
+ # Bootstrap installs a proper cmd/dist, built with the new toolchain.
+ # Throw ours, built with Go 1.4, away after bootstrap.
+-./cmd/dist/dist bootstrap $buildall $vflag $GO_DISTFLAGS "$@"
++CC="${BUILD_CC:-${CC}}" ./cmd/dist/dist bootstrap $buildall $vflag $GO_DISTFLAGS "$@"
+ rm -f ./cmd/dist/dist
+ 
+ # DO NOT ADD ANY NEW CODE HERE.
+-- 
+2.14.1
+
diff --git a/meta/recipes-devtools/go/go-1.10/0006-cmd-dist-separate-host-and-target-builds.patch b/meta/recipes-devtools/go/go-1.10/0006-cmd-dist-separate-host-and-target-builds.patch
new file mode 100644
index 0000000000..9fe6996284
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.10/0006-cmd-dist-separate-host-and-target-builds.patch
@@ -0,0 +1,277 @@
+From 2f07af34697c61decdcfa5b11434451fbcf37704 Mon Sep 17 00:00:00 2001
+From: Matt Madison <matt@madison.systems>
+Date: Sat, 17 Feb 2018 10:03:48 -0800
+Subject: [PATCH 6/9] cmd/dist: separate host and target builds
+
+Change the dist tool to allow for OE-style cross-
+and cross-canadian builds:
+
+ - command flags --host-only and --target only are added;
+   if one is present, the other changes mentioned below
+   take effect, and arguments may also be specified on
+   the command line to enumerate the package(s) to be
+   built.
+
+ - for OE cross builds, go_bootstrap is always built for
+   the current build host, and is moved, along with the supporting
+   toolchain (asm, compile, etc.) to a separate 'native_native'
+   directory under GOROOT/pkg/tool.
+
+ - go_bootstrap is not automatically removed after the build,
+   so it can be reused later (e.g., building both static and
+   shared runtime).
+
+Note that for --host-only builds, it would be nice to specify
+just the "cmd" package to build only the go commands/tools,
+the staleness checks in the dist tool will fail if the "std"
+library has not also been built.  So host-only builds have to
+build everything anyway.
+
+Upstream-Status: Inappropriate [OE specific]
+
+Signed-off-by: Matt Madison <matt@madison.systems>
+
+more dist cleanup
+---
+ src/cmd/dist/build.go | 149 +++++++++++++++++++++++++++++++++++++-------------
+ 1 file changed, 111 insertions(+), 38 deletions(-)
+
+diff --git a/src/cmd/dist/build.go b/src/cmd/dist/build.go
+index afc615b5c2..36262665b2 100644
+--- a/src/cmd/dist/build.go
++++ b/src/cmd/dist/build.go
+@@ -38,6 +38,7 @@ var (
+ 	goldflags        string
+ 	workdir          string
+ 	tooldir          string
++	build_tooldir	 string
+ 	oldgoos          string
+ 	oldgoarch        string
+ 	exe              string
+@@ -49,6 +50,7 @@ var (
+ 
+ 	rebuildall   bool
+ 	defaultclang bool
++	crossBuild   bool
+ 
+ 	vflag int // verbosity
+ )
+@@ -223,6 +225,8 @@ func xinit() {
+ 	if tooldir = os.Getenv("GOTOOLDIR"); tooldir == "" {
+ 		tooldir = pathf("%s/pkg/tool/%s_%s", goroot, gohostos, gohostarch)
+ 	}
++	build_tooldir = pathf("%s/pkg/tool/native_native", goroot)
++
+ }
+ 
+ // compilerEnv returns a map from "goos/goarch" to the
+@@ -252,7 +256,6 @@ func compilerEnv(envName, def string) map[string]string {
+ 		if gohostos != goos || gohostarch != goarch {
+ 			m[gohostos+"/"+gohostarch] = m[""]
+ 		}
+-		m[""] = env
+ 	}
+ 
+ 	for _, goos := range okgoos {
+@@ -479,8 +482,10 @@ func setup() {
+ 	// We keep it in pkg/, just like the object directory above.
+ 	if rebuildall {
+ 		xremoveall(tooldir)
++		xremoveall(build_tooldir)
+ 	}
+ 	xmkdirall(tooldir)
++	xmkdirall(build_tooldir)
+ 
+ 	// Remove tool binaries from before the tool/gohostos_gohostarch
+ 	xremoveall(pathf("%s/bin/tool", goroot))
+@@ -1130,11 +1135,29 @@ func cmdbootstrap() {
+ 
+ 	var noBanner bool
+ 	var debug bool
++	var hostOnly bool
++	var targetOnly bool
++	var toBuild = []string { "std", "cmd" }
++
+ 	flag.BoolVar(&rebuildall, "a", rebuildall, "rebuild all")
+ 	flag.BoolVar(&debug, "d", debug, "enable debugging of bootstrap process")
+ 	flag.BoolVar(&noBanner, "no-banner", noBanner, "do not print banner")
++	flag.BoolVar(&hostOnly, "host-only", hostOnly, "build only host binaries, not target")
++	flag.BoolVar(&targetOnly, "target-only", targetOnly, "build only target binaries, not host")
+ 
+-	xflagparse(0)
++	xflagparse(-1)
++
++	if (hostOnly && targetOnly) {
++		fatalf("specify only one of --host-only or --target-only\n")
++	}
++	crossBuild = hostOnly || targetOnly
++	if flag.NArg() > 0 {
++		if crossBuild {
++			toBuild = flag.Args()
++		} else {
++			fatalf("package names not permitted without --host-only or --target-only\n")
++		}
++	}
+ 
+ 	if debug {
+ 		// cmd/buildid is used in debug mode.
+@@ -1182,8 +1205,13 @@ func cmdbootstrap() {
+ 		xprintf("\n")
+ 	}
+ 
+-	gogcflags = os.Getenv("GO_GCFLAGS") // we were using $BOOT_GO_GCFLAGS until now
+-	goldflags = os.Getenv("GO_LDFLAGS")
++	// For split host/target cross/cross-canadian builds, we don't
++	// want to be setting these flags until after we have compiled
++	// the toolchain that runs on the build host.
++	if ! crossBuild {
++		gogcflags = os.Getenv("GO_GCFLAGS") // we were using $BOOT_GO_GCFLAGS until now
++		goldflags = os.Getenv("GO_LDFLAGS")
++	}
+ 	goBootstrap := pathf("%s/go_bootstrap", tooldir)
+ 	cmdGo := pathf("%s/go", gobin)
+ 	if debug {
+@@ -1212,7 +1240,11 @@ func cmdbootstrap() {
+ 		xprintf("\n")
+ 	}
+ 	xprintf("Building Go toolchain2 using go_bootstrap and Go toolchain1.\n")
+-	os.Setenv("CC", compilerEnvLookup(defaultcc, goos, goarch))
++	if crossBuild {
++		os.Setenv("CC", defaultcc[""])
++	} else {
++		os.Setenv("CC", compilerEnvLookup(defaultcc, goos, goarch))
++	}
+ 	goInstall(goBootstrap, append([]string{"-i"}, toolchain...)...)
+ 	if debug {
+ 		run("", ShowOutput|CheckExit, pathf("%s/compile", tooldir), "-V=full")
+@@ -1249,45 +1281,82 @@ func cmdbootstrap() {
+ 	}
+ 	checkNotStale(goBootstrap, append(toolchain, "runtime/internal/sys")...)
+ 
+-	if goos == oldgoos && goarch == oldgoarch {
+-		// Common case - not setting up for cross-compilation.
+-		timelog("build", "toolchain")
+-		if vflag > 0 {
+-			xprintf("\n")
++	if crossBuild {
++		gogcflags = os.Getenv("GO_GCFLAGS")
++		goldflags = os.Getenv("GO_LDFLAGS")
++		tool_files, _ := filepath.Glob(pathf("%s/*", tooldir))
++		for _, f := range tool_files {
++			copyfile(pathf("%s/%s", build_tooldir, filepath.Base(f)), f, writeExec)
++			xremove(f)
++		}
++		os.Setenv("GOTOOLDIR", build_tooldir)
++		goBootstrap = pathf("%s/go_bootstrap", build_tooldir)
++		if hostOnly {
++			timelog("build", "host toolchain")
++			if vflag > 0 {
++				xprintf("\n")
++			}
++			xprintf("Building %s for host, %s/%s.\n", strings.Join(toBuild, ","), goos, goarch)
++			goInstall(goBootstrap, toBuild...)
++			checkNotStale(goBootstrap, toBuild...)
++			// Skip cmdGo staleness checks here, since we can't necessarily run the cmdGo binary
++
++			timelog("build", "target toolchain")
++			if vflag > 0 {
++				xprintf("\n")
++			}
++		} else if targetOnly {
++			goos = oldgoos
++			goarch = oldgoarch
++			os.Setenv("GOOS", goos)
++			os.Setenv("GOARCH", goarch)
++			os.Setenv("CC", compilerEnvLookup(defaultcc, goos, goarch))
++			xprintf("Building %s for target, %s/%s.\n", strings.Join(toBuild, ","), goos, goarch)
++			goInstall(goBootstrap, toBuild...)
++			checkNotStale(goBootstrap, toBuild...)
++			// Skip cmdGo staleness checks here, since we can't run the target's cmdGo binary
+ 		}
+-		xprintf("Building packages and commands for %s/%s.\n", goos, goarch)
+ 	} else {
+-		// GOOS/GOARCH does not match GOHOSTOS/GOHOSTARCH.
+-		// Finish GOHOSTOS/GOHOSTARCH installation and then
+-		// run GOOS/GOARCH installation.
+-		timelog("build", "host toolchain")
+-		if vflag > 0 {
+-			xprintf("\n")
++		if goos == oldgoos && goarch == oldgoarch {
++			// Common case - not setting up for cross-compilation.
++			timelog("build", "toolchain")
++			if vflag > 0 {
++				xprintf("\n")
++			}
++			xprintf("Building packages and commands for %s/%s.\n", goos, goarch)
++		} else {
++			// GOOS/GOARCH does not match GOHOSTOS/GOHOSTARCH.
++			// Finish GOHOSTOS/GOHOSTARCH installation and then
++			// run GOOS/GOARCH installation.
++			timelog("build", "host toolchain")
++			if vflag > 0 {
++				xprintf("\n")
++			}
++			xprintf("Building packages and commands for host, %s/%s.\n", goos, goarch)
++			goInstall(goBootstrap, "std", "cmd")
++			checkNotStale(goBootstrap, "std", "cmd")
++			checkNotStale(cmdGo, "std", "cmd")
++
++			timelog("build", "target toolchain")
++			if vflag > 0 {
++				xpri