From ef30696dc168a7260df77aaaded478c53042fea7 Mon Sep 17 00:00:00 2001
From: Jason Pepas <jasonpepas@gmail.com>
Date: Sat, 2 May 2020 15:26:49 -0500
Subject: [PATCH] Adding linux/ppc to cgoEnabled in cmd/dist/build.go

---
 README.md             | 36 ++++++++++++++++++++++++++++++++++++
 src/cmd/dist/build.go |  1 +
 2 files changed, 37 insertions(+)

diff --git a/README.md b/README.md
index 3dc04a00242bc6..0ae2993eeb9d05 100644
--- a/README.md
+++ b/README.md
@@ -232,3 +232,39 @@ $ cat cmd/go/internal/cfg/zosarch.go | grep ppc
         "linux/ppc64": false,
         "linux/ppc64le": true,
 ```
+
+Ah, in `src/cmd/dist/build.go`, we see this:
+
+```
+// Cannot use go/build directly because cmd/dist for a new release
+// builds against an old release's go/build, which may be out of sync.
+// To reduce duplication, we generate the list for go/build from this.
+//
+// We list all supported platforms in this list, so that this is the
+// single point of truth for supported platforms. This list is used
+// by 'go tool dist list'.
+var cgoEnabled = map[string]bool{
+```
+
+Now let's try bootstrapping again.
+
+```
+$ GOOS=linux GOARCH=ppc ./bootstrap.bash 
+../../go-linux-ppc-bootstrap already exists; remove before continuing
+```
+
+Ok, let's clean that up and try again.
+
+```
+$ rm -rf ../../go-linux-ppc-bootstrap
+$ GOOS=linux GOARCH=ppc ./bootstrap.bash 
+Building packages and commands for host, linux/amd64.
+Building packages and commands for target, linux/ppc.
+go tool compile: exit status 2
+compile: unknown architecture "ppc"
+go tool dist: FAILED: /home/cell/github/pepaslabs/go-linux-ppc-bootstrap/pkg/tool/linux_amd64/go_bootstrap install -gcflags=all= -ldflags=all= std cmd: exit status 1
+```
+
+Ok, perhaps I first need to bootstrap `go` for my own platform (with updated `cgoEnabled` map),
+and then use that to build `go` for `linux/ppc`.
+
diff --git a/src/cmd/dist/build.go b/src/cmd/dist/build.go
index 76036bf99248dc..18a0490b499ce3 100644
--- a/src/cmd/dist/build.go
+++ b/src/cmd/dist/build.go
@@ -1539,6 +1539,7 @@ var cgoEnabled = map[string]bool{
 	"linux/amd64":     true,
 	"linux/arm":       true,
 	"linux/arm64":     true,
+	"linux/ppc":       true,
 	"linux/ppc64":     false,
 	"linux/ppc64le":   true,
 	"linux/mips":      true,