From: Ian Lance Taylor <ian@gcc.gnu.org>
Date: Wed, 14 Jun 2017 13:50:53 +0000 (+0000)
Subject: go/build: use GCCGOTOOLDIR to find gccgo tools
X-Git-Tag: basepoints/gcc-9~6638
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=b205ec303fc93ba64c0991f64a44e7773f68c38a;p=thirdparty%2Fgcc.git

go/build: use GCCGOTOOLDIR to find gccgo tools

    Add the environment variable GCCGOTOOLDIR to permit overriding the default
    directory where tools like cgo are found when building with gccgo.

    This will be used by the cmd/go tests in a future CL.

    Reviewed-on: https://go-review.googlesource.com/45694

From-SVN: r249196
---

diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index 21bf5f28f221..b73c3e1d88ac 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-6d1d558109b5f5e53b31cc3325485dbb9f06d430
+a790c5fec06ced726c7f0f597186883ce61d0a45
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/libgo/go/cmd/go/alldocs.go b/libgo/go/cmd/go/alldocs.go
index 3d5dd2b39725..f946bf6105f0 100644
--- a/libgo/go/cmd/go/alldocs.go
+++ b/libgo/go/cmd/go/alldocs.go
@@ -1143,6 +1143,9 @@
 // 		Defined by Git. A colon-separated list of schemes that are allowed to be used
 // 		with git fetch/clone. If set, any scheme not explicitly mentioned will be
 // 		considered insecure by 'go get'.
+//	GCCGOTOOLDIR
+//		If set, where to find gccgo tools, such as cgo.
+//		The default is based on how gccgo was configured.
 //
 //
 // Import path syntax
diff --git a/libgo/go/cmd/go/help.go b/libgo/go/cmd/go/help.go
index 0c663ad463f6..6b7422c95c60 100644
--- a/libgo/go/cmd/go/help.go
+++ b/libgo/go/cmd/go/help.go
@@ -508,6 +508,9 @@ Special-purpose environment variables:
 		Defined by Git. A colon-separated list of schemes that are allowed to be used
 		with git fetch/clone. If set, any scheme not explicitly mentioned will be
 		considered insecure by 'go get'.
+	GCCGOTOOLDIR
+		If set, where to find gccgo tools, such as cgo.
+		The default is based on how gccgo was configured.
 	`,
 }
 
diff --git a/libgo/go/go/build/build.go b/libgo/go/go/build/build.go
index 4e1b29fecd99..cce5d482adab 100644
--- a/libgo/go/go/build/build.go
+++ b/libgo/go/go/build/build.go
@@ -1549,7 +1549,7 @@ func init() {
 
 func getToolDir() string {
 	if runtime.Compiler == "gccgo" {
-		return runtime.GCCGOTOOLDIR
+		return envOr("GCCGOTOOLDIR", runtime.GCCGOTOOLDIR)
 	} else {
 		return filepath.Join(runtime.GOROOT(), "pkg/tool/"+runtime.GOOS+"_"+runtime.GOARCH)
 	}