build: convert src/cmd to use make directly and simplify src/make.bash

R=adg, bsiegert, rsc
CC=golang-dev
https://golang.org/cl/4221047

src/cmd/Makefile

+# Copyright 2011 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+include ../Make.inc
+
+all: install
+
+# Only build tools for current architecture, and only tools written in C.
+# The tools written in Go are managed by ../pkg/Makefile.
+DIRS=\
+	$(O)a\
+	$(O)c\
+	$(O)g\
+	$(O)l\
+	cc\
+	cov\
+	gc\
+	godefs\
+	gopack\
+	gotest\
+	nm\
+	prof\
+	
+# Clean applies to all directories, even for other architectures or 
+# written in Go.
+CLEANDIRS=\
+	$(DIRS)\
+	5a\
+	5c\
+	5g\
+	5l\
+	6a\
+	6c\
+	6g\
+	6l\
+	8a\
+	8c\
+	8g\
+	8l\
+	cgo\
+	ebnflint\
+	godoc\
+	gofmt\
+	goinstall\
+	goyacc\
+	hgpatch\
+
+install: $(patsubst %,%.install,$(DIRS))
+clean: $(patsubst %,%.clean,$(CLEANDIRS))
+
+%.install:
+	@echo
+	@echo %%%% making $* %%%%
+	@echo
+	$(MAKE) -C $* install
+
+gc.install: cc.install
+
+$(O)c.install: cc.install
+
+$(O)g.install: gc.install
+
+%.clean:
+	$(MAKE) -C $* clean
+
+echo-dirs:
+	@echo $(DIRS)

src/cmd/clean.bash

-#!/usr/bin/env bash
-# Copyright 2009 The Go Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style
-# license that can be found in the LICENSE file.
-
-gomake=gomake
-if [ "$1" == "--gomake" -a "$2" != "" ]; then
-	gomake=$2
-fi
-
-for i in cc 6l 6a 6c 8l 8a 8c 8g 5l 5a 5c 5g gc 6g gopack nm cgo cov ebnflint godefs godoc gofmt goinstall gotest goyacc hgpatch prof
-do
-	cd $i
-	$gomake clean
-	cd ..
-done

src/cmd/make.bash

-#!/usr/bin/env bash
-# Copyright 2009 The Go Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style
-# license that can be found in the LICENSE file.
-
-set -e
-
-bash clean.bash
-
-eval $(gomake --no-print-directory -f ../Make.inc go-env)
-if [ -z "$O" ]; then
-	echo 'missing $O - maybe no Make.$GOARCH?' 1>&2
-	exit 1
-fi
-
-cd ${O}l
-bash mkenam
-gomake enam.o
-cd ..
-
-# Note: commands written in Go are not listed here.
-# They are in ../pkg/Makefile so that they can be built
-# after the Go libraries on which they depend.
-for i in cc ${O}l ${O}a ${O}c gc ${O}g cov godefs gopack gotest nm prof
-do
-	echo; echo; echo %%%% making $i %%%%; echo
-	cd $i
-	gomake install
-	cd ..
-done

src/make.bash

@@ -61,24 +61,8 @@ bash "$GOROOT"/src/clean.bash
 # pkg builds libcgo and the Go programs in cmd.
 for i in lib9 libbio libmach cmd pkg
 do
-	# The ( ) here are to preserve the current directory
-	# for the next round despite the cd $i below.
-	# set -e does not apply to ( ) so we must explicitly
-	# test the exit status.
-	(
-		echo; echo; echo %%%% making $i %%%%; echo
-		cd "$GOROOT"/src/$i
-		case $i in
-		cmd)
-			bash make.bash
-			;;
-		pkg)
-			gomake install
-			;;
-		*)
-			gomake install
-		esac
-	)  || exit 1
+	echo; echo; echo %%%% making $i %%%%; echo
+	gomake -C $i install
 done
 
 # Print post-install messages.