Use a single Make.conf for setting CC, etc.

This makes it easy to build with other flags
(like -ggdb) or other compilers (like cc64).

R=r
DELTA=45  (6 added, 22 deleted, 17 changed)
OCL=13790
CL=13793

src/Make.conf

+# 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.
+
+CC=cc64
+LD=cc64
+CFLAGS=-ggdb -I$(GOROOT)/include
+BIN=$(HOME)/bin
+O=o
+YFLAGS=-d

src/cmd/6a/Makefile

@@ -2,10 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-YFLAGS=-d
-CFLAGS=-I$(GOROOT)/include
-BIN=$(HOME)/bin
-O=o
+include ../../Make.conf
 
 TARG=\
 	6a\
@@ -26,7 +23,7 @@ YFILES=\
 	a.y\
 
 $(TARG): $(OFILES)
-	cc -o $(TARG) -L$(GOROOT)/lib $(OFILES) -lbio -l9
+	$(LD) -o $(TARG) -L$(GOROOT)/lib $(OFILES) -lbio -l9
 
 $(OFILES): $(HFILES)
 

src/cmd/6c/Makefile

@@ -2,9 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-CFLAGS=-I$(GOROOT)/include
-BIN=$(HOME)/bin
-O=o
+include ../../Make.conf
 
 TARG=\
 	6c\
@@ -32,7 +30,7 @@ LIB=\
 	../cc/cc.a$O
 
 $(TARG): $(OFILES) $(LIB)
-	cc -o $(TARG) -L$(GOROOT)/lib $(OFILES) $(LIB) -lbio -l9
+	$(LD) -o $(TARG) -L$(GOROOT)/lib $(OFILES) $(LIB) -lbio -l9
 
 $(OFILES): $(HFILES)
 

src/cmd/6g/Makefile

@@ -2,9 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-CFLAGS=-I$(GOROOT)/include
-BIN=$(HOME)/bin
-O=o
+include ../../Make.conf
 
 TARG=\
 	6g
@@ -27,7 +25,7 @@ LIB=\
 	../gc/gc.a$O
 
 $(TARG): $(OFILES) $(LIB)
-	cc -o $(TARG) -L$(GOROOT)/lib $(OFILES) $(LIB) -lbio -l9
+	$(LD) -o $(TARG) -L$(GOROOT)/lib $(OFILES) $(LIB) -lbio -l9
 
 $(OFILES): $(HFILES)
 

src/cmd/6l/Makefile

@@ -2,9 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-CFLAGS=-I$(GOROOT)/include
-BIN=$(HOME)/bin
-O=o
+include ../../Make.conf
 
 TARG=\
 	6l\
@@ -25,7 +23,7 @@ HFILES=\
 
 
 $(TARG): $(OFILES)
-	cc -o $(TARG) -L$(GOROOT)/lib $(OFILES) -lbio -l9
+	$(LD) -o $(TARG) -L$(GOROOT)/lib $(OFILES) -lbio -l9
 
 $(OFILES): $(HFILES)
 

src/cmd/ar/Makefile

@@ -2,9 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-CFLAGS=-I$(GOROOT)/include
-BIN=$(HOME)/bin
-O=o
+include ../../Make.conf
 
 # The directory is ar because the source is portable and general.
 # We call the binary 6ar to avoid confusion and because this binary
@@ -15,7 +13,7 @@ OFILES=\
 	ar.$O\
 
 $(TARG): $(OFILES)
-	cc -o $(TARG) -L$(GOROOT)/lib $(OFILES) -lmach_amd64 -lbio -l9
+	$(LD) -o $(TARG) -L$(GOROOT)/lib $(OFILES) -lmach_amd64 -lbio -l9
 
 clean:
 	rm -f $(OFILES) $(TARG)

src/cmd/cc/Makefile

@@ -2,10 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-YFLAGS=-d
-CFLAGS=-I$(GOROOT)/include
-BIN=$(HOME)/bin
-O=o
+include ../../Make.conf
 
 LIB=\
 	cc.a$O\

src/cmd/gc/Makefile

@@ -2,10 +2,7 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-YFLAGS=-d
-CFLAGS=-I$(GOROOT)/include
-BIN=$(HOME)/bin
-O=o
+include ../../Make.conf
 
 LIB=\
 	gc.a$O\

src/libbio/Makefile

@@ -22,8 +22,7 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
 
-CFLAGS=-I$(GOROOT)/include
-O=o
+include ../Make.conf
 
 LIB=libbio.a
 

src/libmach_amd64/Makefile

@@ -26,8 +26,7 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
 
-CFLAGS=-I$(GOROOT)/include
-O=o
+include ../Make.conf
 
 LIB=libmach_amd64.a
 OFILES=\