go: Add recipes for 1.12 release and make it default

- Refresh patches
- Enable GOCACHE required as of Go 1.12

(From OE-Core rev: f559fd6df2978f9093672794420eada2b7452987)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

20 files changed, 964 insertions, 4 deletions

diff --git a/meta/classes/go.bbclass b/meta/classes/go.bbclass
index af331f8018..7069c5fec0 100644
--- a/meta/classes/go.bbclass
+++ b/meta/classes/go.bbclass
@@ -45,7 +45,6 @@ GO_INSTALL_FILTEROUT ?= "${GO_IMPORT}/vendor/"
 
 B = "${WORKDIR}/build"
 export GOPATH = "${B}"
-export GOCACHE = "off"
 export GOTMPDIR ?= "${WORKDIR}/go-tmp"
 GOTMPDIR[vardepvalue] = ""
 
diff --git a/meta/conf/distro/include/tcmode-default.inc b/meta/conf/distro/include/tcmode-default.inc
index 12d3901ee1..04373cc0aa 100644
--- a/meta/conf/distro/include/tcmode-default.inc
+++ b/meta/conf/distro/include/tcmode-default.inc
@@ -25,7 +25,7 @@ GDBVERSION ?= "8.2%"
 GLIBCVERSION ?= "2.29%"
 LINUXLIBCVERSION ?= "5.0%"
 QEMUVERSION ?= "3.1%"
-GOVERSION ?= "1.11%"
+GOVERSION ?= "1.12%"
 
 PREFERRED_VERSION_gcc ?= "${GCCVERSION}"
 PREFERRED_VERSION_gcc-cross-${TARGET_ARCH} ?= "${GCCVERSION}"
diff --git a/meta/recipes-devtools/go/go-1.12.inc b/meta/recipes-devtools/go/go-1.12.inc
new file mode 100644
index 0000000000..4f6c341fc3
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.12.inc
@@ -0,0 +1,23 @@
+require go-common.inc
+
+GO_BASEVERSION = "1.12"
+GO_MINOR = ""
+PV .= "${GO_MINOR}"
+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-use-GOBUILDMODE-to-set-buildmode.patch \
+"
+SRC_URI_append_libc-musl = " file://0009-ld-replace-glibc-dynamic-linker-with-musl.patch"
+
+SRC_URI[main.md5sum] = "b3332feba8a945a193b47a52d9981bb9"
+SRC_URI[main.sha256sum] = "09c43d3336743866f2985f566db0520b36f4992aea2b4b2fd9f52f17049e88f2"
diff --git a/meta/recipes-devtools/go/go-1.12/0001-allow-CC-and-CXX-to-have-multiple-words.patch b/meta/recipes-devtools/go/go-1.12/0001-allow-CC-and-CXX-to-have-multiple-words.patch
new file mode 100644
index 0000000000..4442858c83
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.12/0001-allow-CC-and-CXX-to-have-multiple-words.patch
@@ -0,0 +1,31 @@
+From 7cc519aa5f84cf8fc7ac8c10fc69aa8040330ea0 Mon Sep 17 00:00:00 2001
+From: Matt Madison <matt@madison.systems>
+Date: Mon, 19 Feb 2018 08:49:33 -0800
+Subject: [PATCH] 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 afadbad..cedbfbf 100644
+--- a/src/cmd/go/internal/envcmd/env.go
++++ b/src/cmd/go/internal/envcmd/env.go
+@@ -85,11 +85,11 @@ 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})
diff --git a/meta/recipes-devtools/go/go-1.12/0002-cmd-go-make-content-based-hash-generation-less-pedan.patch b/meta/recipes-devtools/go/go-1.12/0002-cmd-go-make-content-based-hash-generation-less-pedan.patch
new file mode 100644
index 0000000000..66b8561874
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.12/0002-cmd-go-make-content-based-hash-generation-less-pedan.patch
@@ -0,0 +1,218 @@
+From 47db69e20ed66fb62b01affd83d829654b829893 Mon Sep 17 00:00:00 2001
+From: Matt Madison <matt@madison.systems>
+Date: Mon, 19 Feb 2018 08:50:59 -0800
+Subject: [PATCH] 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 cedbfbf..5763a0d 100644
+--- a/src/cmd/go/internal/envcmd/env.go
++++ b/src/cmd/go/internal/envcmd/env.go
+@@ -128,7 +128,7 @@ func ExtraEnvVars() []cfg.EnvVar {
+ func ExtraEnvVarsCostly() []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 12e1527..e41bfac 100644
+--- a/src/cmd/go/internal/work/exec.go
++++ b/src/cmd/go/internal/work/exec.go
+@@ -174,6 +174,8 @@ 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
+@@ -190,7 +192,7 @@ 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)
+@@ -201,13 +203,13 @@ func (b *Builder) buildActionID(a *Action) cache.ActionID {
+        }
+        if len(p.CgoFiles)+len(p.SwigFiles) > 0 {
+                fmt.Fprintf(h, "cgo %q\n", b.toolID("cgo"))
+-               cppflags, cflags, cxxflags, fflags, ldflags, _ := b.CFlags(p)
+-               fmt.Fprintf(h, "CC=%q %q %q %q\n", b.ccExe(), cppflags, cflags, ldflags)
++               cppflags, cflags, cxxflags, fflags, ldflags, _ := b.CFlags(p, true)
++               fmt.Fprintf(h, "CC=%q %q %q %q\n", b.ccExe(true), cppflags, cflags, ldflags)
+                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?
+        }
+@@ -2096,33 +2098,33 @@ 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
+@@ -2131,11 +2133,14 @@ 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
+ }
+ 
+@@ -2285,8 +2290,23 @@ 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 {
+@@ -2304,6 +2324,13 @@ 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
+ }
+@@ -2319,7 +2346,7 @@ 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
+        }
+@@ -2679,7 +2706,7 @@ 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
+        }
diff --git a/meta/recipes-devtools/go/go-1.12/0003-allow-GOTOOLDIR-to-be-overridden-in-the-environment.patch b/meta/recipes-devtools/go/go-1.12/0003-allow-GOTOOLDIR-to-be-overridden-in-the-environment.patch
new file mode 100644
index 0000000000..b6ca40edee
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.12/0003-allow-GOTOOLDIR-to-be-overridden-in-the-environment.patch
@@ -0,0 +1,48 @@
+From 5c32c38bf19b24f0aadd78012d17ff5caa82151e Mon Sep 17 00:00:00 2001
+From: Matt Madison <matt@madison.systems>
+Date: Sat, 17 Feb 2018 05:24:20 -0800
+Subject: [PATCH] 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 | 7 +++++--
+ 2 files changed, 8 insertions(+), 3 deletions(-)
+
+Index: go/src/cmd/dist/build.go
+===================================================================
+--- go.orig/src/cmd/dist/build.go
++++ go/src/cmd/dist/build.go
+@@ -228,7 +228,9 @@ 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
+Index: go/src/cmd/go/internal/cfg/cfg.go
+===================================================================
+--- go.orig/src/cmd/go/internal/cfg/cfg.go
++++ go/src/cmd/go/internal/cfg/cfg.go
+@@ -116,7 +116,11 @@ func init() {
+                // 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)
++               }
+        }
+ }
+ 
diff --git a/meta/recipes-devtools/go/go-1.12/0004-ld-add-soname-to-shareable-objects.patch b/meta/recipes-devtools/go/go-1.12/0004-ld-add-soname-to-shareable-objects.patch
new file mode 100644
index 0000000000..004a33a023
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.12/0004-ld-add-soname-to-shareable-objects.patch
@@ -0,0 +1,45 @@
+From 55eb8c95a89f32aec16b7764e78e8cf75169dc81 Mon Sep 17 00:00:00 2001
+From: Matt Madison <matt@madison.systems>
+Date: Sat, 17 Feb 2018 06:26:10 -0800
+Subject: [PATCH] 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 220aab3..703925f 100644
+--- a/src/cmd/link/internal/ld/lib.go
++++ b/src/cmd/link/internal/ld/lib.go
+@@ -1135,6 +1135,7 @@ 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.
+@@ -1146,6 +1147,8 @@ 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")
+@@ -1154,6 +1157,7 @@ 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)))
+                }
+        }
+ 
diff --git a/meta/recipes-devtools/go/go-1.12/0005-make.bash-override-CC-when-building-dist-and-go_boot.patch b/meta/recipes-devtools/go/go-1.12/0005-make.bash-override-CC-when-building-dist-and-go_boot.patch
new file mode 100644
index 0000000000..ace8de9eae
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.12/0005-make.bash-override-CC-when-building-dist-and-go_boot.patch
@@ -0,0 +1,37 @@
+From 1bf15aa8fb773604b2524cfdab493fa4d8fa9285 Mon Sep 17 00:00:00 2001
+From: Matt Madison <matt@madison.systems>
+Date: Sat, 17 Feb 2018 06:32:45 -0800
+Subject: [PATCH] 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 78882d9..25943d0 100755
+--- a/src/make.bash
++++ b/src/make.bash
+@@ -163,7 +163,7 @@ 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)
+@@ -194,7 +194,7 @@ 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.
diff --git a/meta/recipes-devtools/go/go-1.12/0006-cmd-dist-separate-host-and-target-builds.patch b/meta/recipes-devtools/go/go-1.12/0006-cmd-dist-separate-host-and-target-builds.patch
new file mode 100644
index 0000000000..0c0d5da80a
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.12/0006-cmd-dist-separate-host-and-target-builds.patch
@@ -0,0 +1,282 @@
+From fe0fcaf43ef3aab81541dad2a71b46254dc4cf6a Mon Sep 17 00:00:00 2001
+From: Matt Madison <matt@madison.systems>
+Date: Sat, 17 Feb 2018 10:03:48 -0800
+Subject: [PATCH] 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 | 153 ++++++++++++++++++++++++++++++------------
+ 1 file changed, 111 insertions(+), 42 deletions(-)
+
+Index: go/src/cmd/dist/build.go
+===================================================================
+--- go.orig/src/cmd/dist/build.go
++++ go/src/cmd/dist/build.go
+@@ -39,6 +39,7 @@ var (
+        goldflags        string
+        workdir          string
+        tooldir          string
++       build_tooldir    string
+        oldgoos          string
+        oldgoarch        string
+        exe              string
+@@ -50,6 +51,7 @@ var (
+ 
+        rebuildall   bool
+        defaultclang bool
++       crossBuild   bool
+ 
+        vflag int // verbosity
+ )
+@@ -231,6 +233,8 @@ 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
+@@ -260,7 +264,6 @@ func compilerEnv(envName, def string) ma
+                if gohostos != goos || gohostarch != goarch {
+                        m[gohostos+"/"+gohostarch] = m[""]
+                }
+-               m[""] = env
+        }
+ 
+        for _, goos := range okgoos {
+@@ -487,8 +490,10 @@ 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))
+@@ -1155,11 +1160,29 @@ 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.
+@@ -1207,8 +1230,13 @@ 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 {
+@@ -1237,7 +1265,11 @@ 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")
+@@ -1274,50 +1306,84 @@ 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 {
++                               xprintf("\n")
++                       }
++                       goos = oldgoos
++                       goarch = oldgoarch
++                       os.Setenv("GOOS", goos)
++                       os.Setenv("GOARCH", goarch)
++                       os.Setenv("CC", compilerEnvLookup(defaultcc, goos, goarch))
++                       xprintf("Building packages and commands for target, %s/%s.\n", goos, goarch)
+                }
+-               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 {
+-                       xprintf("\n")
+-               }
+-               goos = oldgoos
+-               goarch = oldgoarch
+-               os.Setenv("GOOS", goos)
+-               os.Setenv("GOARCH", goarch)
+-               os.Setenv("CC", compilerEnvLookup(defaultcc, goos, goarch))
+-               xprintf("Building packages and commands for target, %s/%s.\n", goos, goarch)
+-       }
+-       targets := []string{"std", "cmd"}
+-       if goos == "js" && goarch == "wasm" {
+-               // Skip the cmd tools for js/wasm. They're not usable.
+-               targets = targets[:1]
+-       }
+-       goInstall(goBootstrap, targets...)
+-       checkNotStale(goBootstrap, targets...)
+-       checkNotStale(cmdGo, targets...)
+-       if debug {
+-               run("", ShowOutput|CheckExit, pathf("%s/compile", tooldir), "-V=full")
+-               run("", ShowOutput|CheckExit, pathf("%s/buildid", tooldir), pathf("%s/pkg/%s_%s/runtime/internal/sys.a", goroot, goos, goarch))
+-               checkNotStale(goBootstrap, append(toolchain, "runtime/internal/sys")...)
+-               copyfile(pathf("%s/compile4", tooldir), pathf("%s/compile", tooldir), writeExec)
++               if debug {
++                       run("", ShowOutput|CheckExit, pathf("%s/compile", tooldir), "-V=full")
++                       run("", ShowOutput|CheckExit, pathf("%s/buildid", tooldir), pathf("%s/pkg/%s_%s/runtime/internal/sys.a", goroot, goos, goarch))
++                       checkNotStale(goBootstrap, append(toolchain, "runtime/internal/sys")...)
++                       copyfile(pathf("%s/compile4", tooldir), pathf("%s/compile", tooldir), writeExec)
++               }
+        }
+ 
+        // Check that there are no new files in $GOROOT/bin other than
+@@ -1335,7 +1401,11 @@ func cmdbootstrap() {
+        }
+ 
+        // Remove go_bootstrap now that we're done.
+-       xremove(pathf("%s/go_bootstrap", tooldir))
++       // Except that for split host/target cross-builds, we need to
++       // keep it.
++       if ! crossBuild {
++               xremove(pathf("%s/go_bootstrap", tooldir))
++       }
+ 
+        // Print trailing banner unless instructed otherwise.
+        if !noBanner {
diff --git a/meta/recipes-devtools/go/go-1.12/0007-cmd-go-make-GOROOT-precious-by-default.patch b/meta/recipes-devtools/go/go-1.12/0007-cmd-go-make-GOROOT-precious-by-default.patch
new file mode 100644
index 0000000000..29ef947abd
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.12/0007-cmd-go-make-GOROOT-precious-by-default.patch
@@ -0,0 +1,106 @@
+From 7cc60b3887be2d5674b9f5d422d022976cf205e5 Mon Sep 17 00:00:00 2001
+From: Matt Madison <matt@madison.systems>
+Date: Fri, 2 Mar 2018 06:00:20 -0800
+Subject: [PATCH] cmd/go: make GOROOT precious by default
+
+The go build tool normally rebuilds whatever it detects is
+stale.  This can be a problem when GOROOT is intended to
+be read-only and the go runtime has been built as a shared
+library, since we don't want every application to be rebuilding
+the shared runtime - particularly in cross-build/packaging
+setups, since that would lead to 'abi mismatch' runtime errors.
+
+This patch prevents the install and linkshared actions from
+installing to GOROOT unless overridden with the GOROOT_OVERRIDE
+environment variable.
+
+Upstream-Status: Inappropriate [OE specific]
+
+Signed-off-by: Matt Madison <matt@madison.systems>
+
+---
+ src/cmd/go/internal/work/action.go |  3 +++
+ src/cmd/go/internal/work/build.go  |  5 +++++
+ src/cmd/go/internal/work/exec.go   | 25 +++++++++++++++++++++++++
+ 3 files changed, 33 insertions(+)
+
+Index: go/src/cmd/go/internal/work/action.go
+===================================================================
+--- go.orig/src/cmd/go/internal/work/action.go
++++ go/src/cmd/go/internal/work/action.go
+@@ -600,6 +600,9 @@ func (b *Builder) addTransitiveLinkDeps(
+                        if p1 == nil || p1.Shlib == "" || haveShlib[filepath.Base(p1.Shlib)] {
+                                continue
+                        }
++                       if goRootPrecious && (p1.Standard || p1.Goroot) {
++                               continue
++                       }
+                        haveShlib[filepath.Base(p1.Shlib)] = true
+                        // TODO(rsc): The use of ModeInstall here is suspect, but if we only do ModeBuild,
+                        // we'll end up building an overall library or executable that depends at runtime
+Index: go/src/cmd/go/internal/work/build.go
+===================================================================
+--- go.orig/src/cmd/go/internal/work/build.go
++++ go/src/cmd/go/internal/work/build.go
+@@ -147,6 +147,7 @@ See also: go install, go get, go clean.
+ }
+ 
+ const concurrentGCBackendCompilationEnabledByDefault = true
++var goRootPrecious bool = true
+ 
+ func init() {
+        // break init cycle
+@@ -160,6 +161,10 @@ func init() {
+ 
+        AddBuildFlags(CmdBuild)
+        AddBuildFlags(CmdInstall)
++
++       if x := os.Getenv("GOROOT_OVERRIDE"); x != "" {
++               goRootPrecious = false
++       }
+ }
+ 
+ // Note that flags consulted by other parts of the code
+Index: go/src/cmd/go/internal/work/exec.go
+===================================================================
+--- go.orig/src/cmd/go/internal/work/exec.go
++++ go/src/cmd/go/internal/work/exec.go
+@@ -436,6 +436,23 @@ func (b *Builder) build(a *Action) (err
+                return fmt.Errorf("missing or invalid binary-only package; expected file %q", a.Package.Target)
+        }
+ 
++       if goRootPrecious && (a.Package.Standard || a.Package.Goroot) {
++               _, err := os.Stat(a.Package.Target)
++               if err == nil {
++                       a.built = a.Package.Target
++                       a.Target = a.Package.Target
++                       a.buildID = b.fileHash(a.Package.Target)
++                       a.Package.Stale = false
++                       a.Package.StaleReason = "GOROOT-resident package"
++                       return nil
++               }
++               a.Package.Stale = true
++               a.Package.StaleReason = "missing or invalid GOROOT-resident package"
++               if b.IsCmdList {
++                       return nil
++               }
++       }
++
+        if err := b.Mkdir(a.Objdir); err != nil {
+                return err
+        }
+@@ -1438,6 +1455,14 @@ func BuildInstallFunc(b *Builder, a *Act
+                return nil
+        }
+ 
++       if goRootPrecious && a.Package != nil {
++               p := a.Package
++               if p.Standard || p.Goroot {
++                       err := fmt.Errorf("attempting to install package %s into read-only GOROOT", p.ImportPath)
++                       return err
++               }
++       }
++
+        if err := b.Mkdir(a.Objdir); err != nil {
+                return err
+        }
diff --git a/meta/recipes-devtools/go/go-1.12/0008-use-GOBUILDMODE-to-set-buildmode.patch b/meta/recipes-devtools/go/go-1.12/0008-use-GOBUILDMODE-to-set-buildmode.patch
new file mode 100644
index 0000000000..225cf439c5
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.12/0008-use-GOBUILDMODE-to-set-buildmode.patch
@@ -0,0 +1,37 @@
+From 0e0c247f0caec23528889ff09d98348cba9028f1 Mon Sep 17 00:00:00 2001
+From: Hongxu Jia <hongxu.jia@windriver.com>
+Date: Fri, 26 Oct 2018 15:02:32 +0800
+Subject: [PATCH] use GOBUILDMODE to set buildmode
+
+While building go itself, the go build system does not support
+to set `-buildmode=pie' from environment.
+
+Add GOBUILDMODE to support it which make PIE executables the default
+build mode, as PIE executables are required as of Yocto
+
+Refers: https://groups.google.com/forum/#!topic/golang-dev/gRCe5URKewI
+Upstream-Status: Denied [upstream choose antoher solution: `17a256b
+cmd/go: -buildmode=pie for android/arm']
+
+Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
+---
+ src/cmd/go/internal/work/build.go | 6 +++++-
+ 1 file changed, 5 insertions(+), 1 deletion(-)
+
+Index: go/src/cmd/go/internal/work/build.go
+===================================================================
+--- go.orig/src/cmd/go/internal/work/build.go
++++ go/src/cmd/go/internal/work/build.go
+@@ -223,7 +223,11 @@ func AddBuildFlags(cmd *base.Command) {
+ 
+        cmd.Flag.Var(&load.BuildAsmflags, "asmflags", "")
+        cmd.Flag.Var(buildCompiler{}, "compiler", "")
+-       cmd.Flag.StringVar(&cfg.BuildBuildmode, "buildmode", "default", "")
++       if bm := os.Getenv("GOBUILDMODE"); bm != "" {
++               cmd.Flag.StringVar(&cfg.BuildBuildmode, "buildmode", bm, "")
++       } else {
++               cmd.Flag.StringVar(&cfg.BuildBuildmode, "buildmode", "default", "")
++       }
+        cmd.Flag.Var(&load.BuildGcflags, "gcflags", "")
+        cmd.Flag.Var(&load.BuildGccgoflags, "gccgoflags", "")
+        cmd.Flag.StringVar(&cfg.BuildMod, "mod", "", "")
diff --git a/meta/recipes-devtools/go/go-1.12/0009-ld-replace-glibc-dynamic-linker-with-musl.patch b/meta/recipes-devtools/go/go-1.12/0009-ld-replace-glibc-dynamic-linker-with-musl.patch
new file mode 100644
index 0000000000..840cf4bbd7
--- /dev/null
+++ b/meta/recipes-devtools/go/go-1.12/0009-ld-replace-glibc-dynamic-linker-with-musl.patch
@@ -0,0 +1,112 @@
+From 35ea4be34e94912b00837e0f7c7385f2e98fe769 Mon Sep 17 00:00:00 2001
+From: Matt Madison <matt@madison.systems>
+Date: Sun, 18 Feb 2018 08:24:05 -0800
+Subject: [PATCH] ld: replace glibc dynamic linker with musl
+
+Rework of patch by Khem Raj <raj.khem@gmail.com>
+for go 1.10.  Should be applied conditionally on
+musl being the system C library.
+
+Upstream-Status: Inappropriate [Real fix should be portable across libcs]
+
+Signed-off-by: Matt Madison <matt@madison.systems>
+
+---
+ src/cmd/link/internal/amd64/obj.go  | 2 +-
+ src/cmd/link/internal/arm/obj.go    | 2 +-
+ src/cmd/link/internal/arm64/obj.go  | 2 +-
+ src/cmd/link/internal/mips/obj.go   | 2 +-
+ src/cmd/link/internal/mips64/obj.go | 2 +-
+ src/cmd/link/internal/ppc64/obj.go  | 2 +-
+ src/cmd/link/internal/s390x/obj.go  | 2 +-
+ src/cmd/link/internal/x86/obj.go    | 2 +-
+ 8 files changed, 8 insertions(+), 8 deletions(-)
+
+--- a/src/cmd/link/internal/amd64/obj.go
++++ b/src/cmd/link/internal/amd64/obj.go
+@@ -62,7 +62,7 @@ func Init() (*sys.Arch, ld.Arch) {
+                PEreloc1:         pereloc1,
+                TLSIEtoLE:        tlsIEtoLE,
+ 
+-               Linuxdynld:     "/lib64/ld-linux-x86-64.so.2",
++               Linuxdynld:     "/lib64/ld-musl-x86-64.so.1",
+                Freebsddynld:   "/libexec/ld-elf.so.1",
+                Openbsddynld:   "/usr/libexec/ld.so",
+                Netbsddynld:    "/libexec/ld.elf_so",
+--- a/src/cmd/link/internal/arm/obj.go
++++ b/src/cmd/link/internal/arm/obj.go
+@@ -59,7 +59,7 @@ func Init() (*sys.Arch, ld.Arch) {
+                Machoreloc1:      machoreloc1,
+                PEreloc1:         pereloc1,
+ 
+-               Linuxdynld:     "/lib/ld-linux.so.3", // 2 for OABI, 3 for EABI
++               Linuxdynld:     "/lib/ld-musl-armhf.so.1",
+                Freebsddynld:   "/usr/libexec/ld-elf.so.1",
+                Openbsddynld:   "/usr/libexec/ld.so",
+                Netbsddynld:    "/libexec/ld.elf_so",
+--- a/src/cmd/link/internal/arm64/obj.go
++++ b/src/cmd/link/internal/arm64/obj.go
+@@ -57,7 +57,7 @@ func Init() (*sys.Arch, ld.Arch) {
+                Gentext:          gentext,
+                Machoreloc1:      machoreloc1,
+ 
+-               Linuxdynld: "/lib/ld-linux-aarch64.so.1",
++               Linuxdynld: "/lib/ld-musl-aarch64.so.1",
+ 
+                Freebsddynld:   "XXX",
+                Openbsddynld:   "XXX",
+--- a/src/cmd/link/internal/mips/obj.go
++++ b/src/cmd/link/internal/mips/obj.go
+@@ -60,7 +60,7 @@ func Init() (*sys.Arch, ld.Arch) {
+                Gentext:          gentext,
+                Machoreloc1:      machoreloc1,
+ 
+-               Linuxdynld: "/lib/ld.so.1",
++               Linuxdynld: "/lib/ld-musl-mipsle.so.1",
+ 
+                Freebsddynld:   "XXX",
+                Openbsddynld:   "XXX",
+--- a/src/cmd/link/internal/mips64/obj.go
++++ b/src/cmd/link/internal/mips64/obj.go
+@@ -59,7 +59,7 @@ func Init() (*sys.Arch, ld.Arch) {
+                Gentext:          gentext,
+                Machoreloc1:      machoreloc1,
+ 
+-               Linuxdynld:     "/lib64/ld64.so.1",
++               Linuxdynld:     "/lib64/ld-musl-mips64le.so.1",
+                Freebsddynld:   "XXX",
+                Openbsddynld:   "XXX",
+                Netbsddynld:    "XXX",
+--- a/src/cmd/link/internal/ppc64/obj.go
++++ b/src/cmd/link/internal/ppc64/obj.go
+@@ -62,7 +62,7 @@ func Init() (*sys.Arch, ld.Arch) {
+                Machoreloc1:      machoreloc1,
+ 
+                // TODO(austin): ABI v1 uses /usr/lib/ld.so.1,
+-               Linuxdynld: "/lib64/ld64.so.1",
++               Linuxdynld: "/lib64/ld-musl-powerpc64le.so.1",
+ 
+                Freebsddynld:   "XXX",
+                Openbsddynld:   "XXX",
+--- a/src/cmd/link/internal/s390x/obj.go
++++ b/src/cmd/link/internal/s390x/obj.go
+@@ -57,7 +57,7 @@ func Init() (*sys.Arch, ld.Arch) {
+                Gentext:          gentext,
+                Machoreloc1:      machoreloc1,
+ 
+-               Linuxdynld: "/lib64/ld64.so.1",
++               Linuxdynld: "/lib64/ld-musl-s390x.so.1",
+ 
+                // not relevant for s390x
+                Freebsddynld:   "XXX",
+--- a/src/cmd/link/internal/x86/obj.go
++++ b/src/cmd/link/internal/x86/obj.go
+@@ -58,7 +58,7 @@ func Init() (*sys.Arch, ld.Arch) {
+                Machoreloc1:      machoreloc1,
+                PEreloc1:         pereloc1,
+ 
+-               Linuxdynld:   "/lib/ld-linux.so.2",
++               Linuxdynld:   "/lib/ld-musl-i386.so.1",
+                Freebsddynld: "/usr/libexec/ld-elf.so.1",
+                Openbsddynld: "/usr/libexec/ld.so",
+                Netbsddynld:  "/usr/libexec/ld.elf_so",
diff --git a/meta/recipes-devtools/go/go-common.inc b/meta/recipes-devtools/go/go-common.inc
index 11d55c4d36..93a3d3b5fb 100644
--- a/meta/recipes-devtools/go/go-common.inc
+++ b/meta/recipes-devtools/go/go-common.inc
@@ -25,7 +25,6 @@ SSTATE_SCAN_CMD = "true"
 export GOROOT_OVERRIDE = "1"
 export GOTMPDIR ?= "${WORKDIR}/go-tmp"
 GOTMPDIR[vardepvalue] = ""
-export GOCACHE = "off"
 export CGO_ENABLED = "1"
 
 do_compile_prepend() {
diff --git a/meta/recipes-devtools/go/go-cross-canadian_1.12.bb b/meta/recipes-devtools/go/go-cross-canadian_1.12.bb
new file mode 100644
index 0000000000..7ac9449e47
--- /dev/null
+++ b/meta/recipes-devtools/go/go-cross-canadian_1.12.bb
@@ -0,0 +1,2 @@
+require go-cross-canadian.inc
+require go-${PV}.inc
diff --git a/meta/recipes-devtools/go/go-cross.inc b/meta/recipes-devtools/go/go-cross.inc
index 6d9aa5c2dd..29ce7f6e84 100644
--- a/meta/recipes-devtools/go/go-cross.inc
+++ b/meta/recipes-devtools/go/go-cross.inc
@@ -14,7 +14,6 @@ export GO386 = "${TARGET_GO386}"
 export GOMIPS = "${TARGET_GOMIPS}"
 export GOROOT_BOOTSTRAP = "${STAGING_LIBDIR_NATIVE}/go"
 export GOROOT_FINAL = "${libdir}/go"
-export GOCACHE = "off"
 CC = "${@d.getVar('BUILD_CC').strip()}"
 
 do_configure[noexec] = "1"
diff --git a/meta/recipes-devtools/go/go-cross_1.12.bb b/meta/recipes-devtools/go/go-cross_1.12.bb
new file mode 100644
index 0000000000..80b5a03f6c
--- /dev/null
+++ b/meta/recipes-devtools/go/go-cross_1.12.bb
@@ -0,0 +1,2 @@
+require go-cross.inc
+require go-${PV}.inc
diff --git a/meta/recipes-devtools/go/go-crosssdk_1.12.bb b/meta/recipes-devtools/go/go-crosssdk_1.12.bb
new file mode 100644
index 0000000000..1857c8a577
--- /dev/null
+++ b/meta/recipes-devtools/go/go-crosssdk_1.12.bb
@@ -0,0 +1,2 @@
+require go-crosssdk.inc
+require go-${PV}.inc
diff --git a/meta/recipes-devtools/go/go-native_1.12.bb b/meta/recipes-devtools/go/go-native_1.12.bb
new file mode 100644
index 0000000000..bbf3c0dd73
--- /dev/null
+++ b/meta/recipes-devtools/go/go-native_1.12.bb
@@ -0,0 +1,2 @@
+require ${PN}.inc
+require go-${PV}.inc
diff --git a/meta/recipes-devtools/go/go-runtime_1.12.bb b/meta/recipes-devtools/go/go-runtime_1.12.bb
new file mode 100644
index 0000000000..43b68b4e46
--- /dev/null
+++ b/meta/recipes-devtools/go/go-runtime_1.12.bb
@@ -0,0 +1,2 @@
+require go-${PV}.inc
+require go-runtime.inc
diff --git a/meta/recipes-devtools/go/go_1.12.bb b/meta/recipes-devtools/go/go_1.12.bb
new file mode 100644
index 0000000000..42cdb0430a
--- /dev/null
+++ b/meta/recipes-devtools/go/go_1.12.bb
@@ -0,0 +1,14 @@
+require go-${PV}.inc
+require go-target.inc
+
+export GOBUILDMODE=""
+
+# Add pie to GOBUILDMODE to satisfy "textrel" QA checking, but mips
+# doesn't support -buildmode=pie, so skip the QA checking for mips and its
+# variants.
+python() {
+    if 'mips' in d.getVar('TARGET_ARCH'):
+        d.appendVar('INSANE_SKIP_%s' % d.getVar('PN'), " textrel")
+    else:
+        d.setVar('GOBUILDMODE', 'pie')
+}