go: add back 1.12 version to avoid compilation failure

go 1.12 was removed from oe-core, but currently k8s cannot
be built successfully with go 1.13. See link below.

  https://github.com/kubernetes/kubernetes/issues/82531

We need to wait for k8s to support go 1.13 and update it
to latest release, as well as its depedencies. Before this
is done, add back go 1.12 and use it.

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>

1 files changed, 218 insertions, 0 deletions

diff --git a/recipes-containers/kubernetes/go-1.12/0002-cmd-go-make-content-based-hash-generation-less-pedan.patch b/recipes-containers/kubernetes/go-1.12/0002-cmd-go-make-content-based-hash-generation-less-pedan.patch
new file mode 100644
index 00000000..66b85618
--- /dev/null
+++ b/recipes-containers/kubernetes/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
+        }