From 66a45dae3af140662e17ef85c2e6fe40270a2553 Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Mon, 22 Feb 2021 17:54:01 -0800
Subject: [PATCH] Revert "cmd/go: make sure CC and CXX are absolute"

OE uses CC/CXX values which consists of cmpiler and options together,
secondly, the environment is canned so this check add little value to OE
based builds

Fixes go-runtime build issues

go install: CXX environment variable is relative; must be absolute path: powerpc64le-yoe-linux-musl-g++ -mlittle-endian -mhard-float -m64 -mabi=elfv2 -mcpu=power9 -fstack-protector-strong -O2 -D_FORTIFY_SOURCE=2 -Wformat -Wformat-security -Werror=format-security --sysroot=/mnt/b/yoe/master/build/tmp/work/ppc64p9le-yoe-linux-musl/go/1.16-r0/recipe-sysroot

This reverts commit aa161e799df7e1eba99d2be10271e76b6f758142.

Upstream-Status: Inappropriate [OE-Specific]
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
 src/cmd/go/internal/envcmd/env.go        |  5 -----
 src/cmd/go/internal/work/init.go         |  6 ------
 src/cmd/go/testdata/script/env_write.txt | 24 ------------------------
 3 files changed, 35 deletions(-)

diff --git a/src/cmd/go/internal/envcmd/env.go b/src/cmd/go/internal/envcmd/env.go
index ff6f0d8..43b94e7 100644
--- a/src/cmd/go/internal/envcmd/env.go
+++ b/src/cmd/go/internal/envcmd/env.go
@@ -457,11 +457,6 @@ func checkEnvWrite(key, val string) error {
 		if !filepath.IsAbs(val) && val != "" {
 			return fmt.Errorf("GOPATH entry is relative; must be absolute path: %q", val)
 		}
-	// Make sure CC and CXX are absolute paths
-	case "CC", "CXX", "GOMODCACHE":
-		if !filepath.IsAbs(val) && val != "" && val != filepath.Base(val) {
-			return fmt.Errorf("%s entry is relative; must be absolute path: %q", key, val)
-		}
 	}
 
 	if !utf8.ValidString(val) {
diff --git a/src/cmd/go/internal/work/init.go b/src/cmd/go/internal/work/init.go
index 37a3e2d..316b0cf 100644
--- a/src/cmd/go/internal/work/init.go
+++ b/src/cmd/go/internal/work/init.go
@@ -39,12 +39,6 @@ func BuildInit() {
 		cfg.BuildPkgdir = p
 	}
 
-	// Make sure CC and CXX are absolute paths
-	for _, key := range []string{"CC", "CXX"} {
-		if path := cfg.Getenv(key); !filepath.IsAbs(path) && path != "" && path != filepath.Base(path) {
-			base.Fatalf("go %s: %s environment variable is relative; must be absolute path: %s\n", flag.Args()[0], key, path)
-		}
-	}
 }
 
 func instrumentInit() {
diff --git a/src/cmd/go/testdata/script/env_write.txt b/src/cmd/go/testdata/script/env_write.txt
index b5e9739..566c876 100644
--- a/src/cmd/go/testdata/script/env_write.txt
+++ b/src/cmd/go/testdata/script/env_write.txt
@@ -129,30 +129,6 @@ go env -w GOTMPDIR=
 go env GOTMPDIR
 stdout ^$
 
-# go env -w rejects relative CC values
-[!windows] go env -w CC=/usr/bin/clang
-go env -w CC=clang
-[!windows] ! go env -w CC=./clang
-[!windows] ! go env -w CC=bin/clang
-[!windows] stderr 'go env -w: CC entry is relative; must be absolute path'
-
-[windows] go env -w CC=$WORK\bin\clang
-[windows] ! go env -w CC=.\clang
-[windows] ! go env -w CC=bin\clang
-[windows] stderr 'go env -w: CC entry is relative; must be absolute path'
-
-# go env -w rejects relative CXX values
-[!windows] go env -w CC=/usr/bin/cpp
-go env -w CXX=cpp
-[!windows] ! go env -w CXX=./cpp
-[!windows] ! go env -w CXX=bin/cpp
-[!windows] stderr 'go env -w: CXX entry is relative; must be absolute path'
-
-[windows] go env -w CXX=$WORK\bin\cpp
-[windows] ! go env -w CXX=.\cpp
-[windows] ! go env -w CXX=bin\cpp
-[windows] stderr 'go env -w: CXX entry is relative; must be absolute path'
-
 # go env -w/-u checks validity of GOOS/ARCH combinations
 env GOOS=
 env GOARCH=
-- 
2.20.1