add gobuild.

use gobuild-generated Makefile for math and os.
other makefile tweaks.
move math/main.go to test/math.go

R=r
OCL=15529
CL=15537

16 files changed, 468 insertions, 173 deletions

diff --git a/src/clean.bash b/src/clean.bash
index cba2129cf..36b0c99fb 100755
--- a/src/clean.bash
+++ b/src/clean.bash
@@ -3,16 +3,15 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-for i in lib9 libbio libmach_amd64 libregexp syscall
+for i in lib9 libbio libmach_amd64 libregexp syscall cmd runtime lib
 do
 	cd $i
-	make clean
-	cd ..
-done
-
-for i in cmd runtime lib
-do
-	cd $i
-	bash clean.bash
+	case $i in
+	cmd | lib)
+		bash clean.bash
+		;;
+	*)
+		make clean
+	esac
 	cd ..
 done
diff --git a/src/cmd/gobuild/Makefile b/src/cmd/gobuild/Makefile
new file mode 100644
index 000000000..339399033
--- /dev/null
+++ b/src/cmd/gobuild/Makefile
@@ -0,0 +1,20 @@
+# Copyright 2009 The Go Authors.  All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+include ../../Make.conf
+
+TARG=gobuild
+OFILES=\
+	gobuild.$O\
+
+$(TARG): $(OFILES)
+	$(LD) -o $(TARG) -L$(GOROOT)/lib $(OFILES) -lbio -l9
+
+clean:
+	rm -f $(OFILES) $(TARG)
+
+install: $(TARG)
+	cp $(TARG) $(BIN)/$(TARG)
+
+$(OFILES): $(HFILES)
diff --git a/src/cmd/gobuild/gobuild.c b/src/cmd/gobuild/gobuild.c
new file mode 100644
index 000000000..0fdf68e19
--- /dev/null
+++ b/src/cmd/gobuild/gobuild.c
@@ -0,0 +1,340 @@
+// Copyright 2009 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Build a collection of go programs into a single package.
+
+#include <u.h>
+#include <unistd.h>
+#include <libc.h>
+#include <bio.h>
+
+void
+usage(void)
+{
+	fprint(2, "usage: gobuild [-m] packagename *.go *.c *.s\n");
+	exits("usage");
+}
+
+int chatty;
+int devnull;	// fd of /dev/null
+int makefile;	// generate Makefile
+char *thechar;	// object character
+
+// Info about when to compile a particular file.
+typedef struct Job Job;
+struct Job
+{
+	char *name;
+	int pass;
+};
+
+// Run the command in argv.
+// Return -1 if it fails (non-zero exit status).
+// Return 0 on success.
+// Showoutput controls whether to let output from command display
+// on standard output and standard error.
+int
+run(char **argv, int showoutput)
+{
+	int pid, i;
+	Waitmsg *w;
+	vlong n0, n1;
+
+	n0 = nsec();
+	pid = fork();
+	if(pid < 0)
+		sysfatal("fork: %r");
+	if(pid == 0){
+		dup(devnull, 0);
+		if(!showoutput){
+			dup(devnull, 1);
+			dup(devnull, 2);
+		}
+		if(devnull > 2)
+			close(devnull);
+		exec(argv[0], argv);
+		fprint(2, "exec %s: %r\n", argv[0]);
+		exit(1);
+	}
+	w = waitfor(pid);
+	n1 = nsec();
+	if(w == nil)
+		sysfatal("waitfor %d: %r", pid);
+	if(chatty > 1){
+		fprint(2, "%5.3f", (n1-n0)/1.e9);
+		for(i=0; argv[i]; i++)
+			fprint(2, " %s", argv[i]);
+		if(w->msg[0])
+			fprint(2, " [%s]", w->msg);
+		fprint(2, "\n");
+	}
+	if(w->msg[0])
+		return -1;
+	return 0;
+}
+
+// Build the file using the compiler cc.
+// Return -1 on error, 0 on success.
+// If show is set, print the command and the output.
+int
+buildcc(char *cc, char *file, int show)
+{
+	char *argv[3];
+
+	if(show)
+		fprint(2, "$ %s %s\n", cc, file);
+	argv[0] = cc;
+	argv[1] = file;
+	argv[2] = nil;
+	return run(argv, show);
+}
+
+// Return bool whether s ends in suffix.
+int
+suffix(char *s, char *suffix)
+{
+	int n1, n2;
+
+	n1 = strlen(s);
+	n2 = strlen(suffix);
+	if(n1>n2 && strcmp(s+n1-n2, suffix) == 0)
+		return 1;
+	return 0;
+}
+
+// Return the name of the compiler for file.
+char*
+compiler(char *file)
+{
+	static char buf[20];
+
+	if(suffix(file, ".go"))
+		snprint(buf, sizeof buf, "%sg", thechar);
+	else if(suffix(file, ".c"))
+		snprint(buf, sizeof buf, "%sc", thechar);
+	else if(suffix(file, ".s"))
+		snprint(buf, sizeof buf, "%sa", thechar);
+	else
+		sysfatal("don't know how to build %s", file);
+	return buf;
+}
+
+// Return the object name for file, replacing the
+// .c or .g or .a with .suffix.
+char*
+goobj(char *file, char *suffix)
+{
+	char *p;
+
+	p = strrchr(file, '.');
+	if(p == nil)
+		sysfatal("don't know object name for %s", file);
+	return smprint("%.*s.%s", utfnlen(file, p-file), file, suffix);
+}
+
+// Makefile preamble template.
+char preamble[] =
+	"O=%s\n"
+	"GC=$(O)g\n"
+	"CC=$(O)c -w\n"
+	"AS=$(O)a\n"
+	"AR=$(O)ar\n"
+	"\n"
+	"PKG=$(GOROOT)/pkg/%s.a\n"
+	"\n"
+	"install: $(PKG)\n"
+	"\n"
+	"nuke: clean\n"
+	"\trm -f $(PKG)\n"
+	"\n"
+	"clean:\n"
+	"\trm -f *.$O *.a\n"
+	"\n"
+	"%%.$O: %%.go\n"
+	"\t$(GC) $*.go\n"
+	"\n"
+	"%%.$O: %%.c\n"
+	"\t$(CC) $*.c\n"
+	"\n"
+	"%%.$O: %%.s\n"
+	"\t$(AS) $*.s\n"
+	"\n"
+;
+
+void
+main(int argc, char **argv)
+{
+	int i, o, p, n, pass, nar, njob, nthis, nnext, oargc;
+	char **ar, **next, **this, **tmp, *goarch, *goroot, *pkgname, *pkgpath, **oargv;
+	Job *job;
+	Biobuf bout;
+
+	oargc = argc;
+	oargv = argv;
+
+	ARGBEGIN{
+	default:
+		usage();
+	case 'm':
+		makefile = 1;
+		break;
+	case 'v':
+		chatty++;
+		break;
+	}ARGEND
+
+	if(argc < 2)
+		usage();
+
+	goarch = getenv("GOARCH");
+	if(goarch == nil)
+		sysfatal("no $GOARCH");
+	if(strcmp(goarch, "amd64") == 0)
+		thechar = "6";
+	else
+		sysfatal("unknown $GOARCH");
+
+	goroot = getenv("GOROOT");
+	if(goroot == nil)
+		sysfatal("no $GOROOT");
+
+	pkgname = argv[0];
+	if(strchr(pkgname, '.')){
+		fprint(2, "pkgname has dot\n");
+		usage();
+	}
+
+	pkgpath = smprint("%s/pkg/%s.a", goroot, pkgname);
+	unlink(pkgpath);
+	if(chatty)
+		fprint(2, "pkg %s\n", pkgpath);
+
+	if((devnull = open("/dev/null", ORDWR)) < 0)
+		sysfatal("open /dev/null: %r");
+
+	// Compile by repeated passes: build as many .6 as you can,
+	// put them all in the archive, and repeat.
+	//
+	// "this" contains the list of files to compile in this pass.
+	// "next" contains the list of files to re-try in the next pass.
+	// "job" contains the list of files that are done, annotated
+	//	with their pass numbers.
+	// "ar" contains the ar command line to run at the end
+	//	of the pass.
+
+	n = argc-1;
+	this = malloc(n*sizeof this[0]);
+	next = malloc(n*sizeof next[0]);
+	job = malloc(n*sizeof job[0]);
+	ar = malloc((n+4)*sizeof job[0]);
+	if(this == nil || next == nil || job == 0 || ar == 0)
+		sysfatal("malloc: %r");
+
+	// Initial "this" is the files given on the command line.
+	for(i=0; i<n; i++)
+		this[i] = argv[i+1];
+	nthis = n;
+
+	ar[0] = smprint("%sar", thechar);
+	ar[1] = "grc";
+	ar[2] = pkgpath;
+
+	njob = 0;
+
+	for(pass=0; nthis > 0; pass++){
+		nnext = 0;
+		nar = 3;
+
+		// Try to build.
+		for(i=0; i<nthis; i++){
+			if(buildcc(compiler(this[i]), this[i], 0) < 0){
+				next[nnext++] = this[i];
+			}else{
+				job[njob].pass = pass;
+				job[njob++].name = this[i];
+				ar[nar++] = goobj(this[i], thechar);
+				if(chatty == 1)
+					fprint(2, "%s ", this[i]);
+			}
+		}
+		if(nthis == nnext){	// they all failed
+			fprint(2, "cannot make progress\n");
+			for(i=0; i<nthis; i++)
+				buildcc(compiler(this[i]), this[i], 1);
+			exits("stalemate");
+		}
+		if(chatty == 1)
+			fprint(2, "\n");
+
+		// Add to archive.
+		ar[nar] = nil;
+		if(run(ar, 1) < 0)
+			sysfatal("ar: %r");
+
+		// Delete objects.
+		for(i=3; i<nar; i++)
+			unlink(ar[i]);
+
+		// Set up for next pass: next = this.
+		tmp = next;
+		next = this;
+		this = tmp;
+		nthis = nnext;
+	}
+
+	if(makefile){
+		// Write makefile.
+		Binit(&bout, 1, OWRITE);
+		Bprint(&bout, "# DO NOT EDIT.  Automatically generated by gobuild.\n");
+		o = Boffset(&bout);
+		Bprint(&bout, "#");
+		for(i=0; i<oargc; i++){
+			if(Boffset(&bout) - o > 60){
+				Bprint(&bout, "\\\n#   ");
+				o = Boffset(&bout);
+			}
+			Bprint(&bout, " %s", oargv[i]);
+		}
+		Bprint(&bout, "\n");
+		Bprint(&bout, preamble, thechar, pkgname);
+
+		// O2=\
+		//	os_file.$O\
+		//	os_time.$O\
+		//
+		p = -1;
+		for(i=0; i<n; i++){
+			if(job[i].pass != p){
+				p = job[i].pass;
+				Bprint(&bout, "\nO%d=\\\n", p+1);
+			}
+			Bprint(&bout, "\t%s\\\n", goobj(job[i].name, "$O"));
+		}
+		Bprint(&bout, "\n");
+
+		// $(PKG): a1 a2
+		Bprint(&bout, "$(PKG):");
+		for(i=0; i<pass; i++)
+			Bprint(&bout, " a%d", i+1);
+		Bprint(&bout, "\n");
+
+		// a1: $(O1)
+		//	$(AS) grc $(PKG) $(O1)
+		for(i=0; i<pass; i++){
+			Bprint(&bout, "a%d:\t$(O%d)\n", i+1, i+1);
+			Bprint(&bout, "\t$(AR) grc $(PKG) $(O%d)\n", i+1);
+		}
+		Bprint(&bout, "\n");
+
+		// $(O1): nuke
+		// $(O2): a1
+		Bprint(&bout, "$(O1): nuke\n");
+		for(i=1; i<pass; i++)
+			Bprint(&bout, "$(O%d): a%d\n", i+1, i);
+		Bprint(&bout, "\n");
+		Bterm(&bout);
+	}
+
+	exits(0);
+}
diff --git a/src/lib/clean.bash b/src/lib/clean.bash
index 0f63401c8..3ae43f4a2 100755
--- a/src/lib/clean.bash
+++ b/src/lib/clean.bash
@@ -6,7 +6,7 @@
 
 rm -f $GOROOT/pkg/*
 
-for i in os math
+for i in os math net time
 do
 	cd $i
 	make nuke
diff --git a/src/lib/make.bash b/src/lib/make.bash
index 5714954fa..6277c93f8 100755
--- a/src/lib/make.bash
+++ b/src/lib/make.bash
@@ -6,8 +6,6 @@
 
 set -e
 
-echo; echo; echo %%%% making lib %%%%; echo
-
 for i in os math
 do
 	echo; echo; echo %%%% making lib/$i %%%%; echo
diff --git a/src/lib/math/Makefile b/src/lib/math/Makefile
index f66cc4161..c792a8eb1 100644
--- a/src/lib/math/Makefile
+++ b/src/lib/math/Makefile
@@ -2,51 +2,72 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
-CFLAGS=
+# DO NOT EDIT.  Automatically generated by gobuild.
+# gobuild -m math asin.go atan.go atan2.go exp.go fabs.go floor.go\
+#    fmod.go hypot.go log.go pow.go pow10.go sin.go sinh.go sqrt.go\
+#    tan.go tanh.go
 O=6
-CC=$(O)c
-AS=$(O)a
 GC=$(O)g
+CC=$(O)c -w
+AS=$(O)a
+AR=$(O)ar
 
-# TODO(r): building directly in the target makes internal dependencies self-consistent.
-# need to address this a better way.
 PKG=$(GOROOT)/pkg/math.a
 
-O1=\
-	atan.$O fabs.$O floor.$O fmod.$O hypot.$O log.$O pow10.$O sin.$O sqrt.$O tan.$O
-O2=\
-	asin.$O atan2.$O exp.$O
-O3=\
-	pow.$O sinh.$O
-O4=\
-	tanh.$O
-
 install: $(PKG)
 
-$(PKG): a1 a2 a3 a4
+nuke: clean
+	rm -f $(PKG)
+
+clean:
+	rm -f *.$O *.a
+
+%.$O: %.go
+	$(GC) $*.go
 
-a1: $(O1)
-	$(O)ar grc $(PKG) $(O1)
+%.$O: %.c
+	$(CC) $*.c
 
-a2: $(O2)
-	$(O)ar grc $(PKG) $(O2)
+%.$O: %.s
+	$(AS) $*.s
 
-a3: $(O3)
-	$(O)ar grc $(PKG) $(O3)
 
-a4: $(O4)
-	$(O)ar grc $(PKG) $(O4)
+O1=\
+	atan.$O\
+	fabs.$O\
+	floor.$O\
+	fmod.$O\
+	hypot.$O\
+	log.$O\
+	pow10.$O\
+	sin.$O\
+	sqrt.$O\
+	tan.$O\
+
+O2=\
+	asin.$O\
+	atan2.$O\
+	exp.$O\
+
+O3=\
+	pow.$O\
+	sinh.$O\
+
+O4=\
+	tanh.$O\
+
+$(PKG): a1 a2 a3 a4
+a1:	$(O1)
+	$(AR) grc $(PKG) $(O1)
+a2:	$(O2)
+	$(AR) grc $(PKG) $(O2)
+a3:	$(O3)
+	$(AR) grc $(PKG) $(O3)
+a4:	$(O4)
+	$(AR) grc $(PKG) $(O4)
 
 $(O1): nuke
 $(O2): a1
 $(O3): a2
 $(O4): a3
 
-nuke:
-	rm -f *.$(O) *.a $(PKG)
-
-clean:
-	rm -f *.$(O) *.a
-
-%.$O:	%.go
-	$(GC) $<
diff --git a/src/lib/math/clean.bash b/src/lib/math/clean.bash
deleted file mode 100644
index 9028ac2a3..000000000
--- a/src/lib/math/clean.bash
+++ /dev/null
@@ -1,7 +0,0 @@
-# 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.
-
-#!/bin/bash
-
-make nuke
diff --git a/src/lib/math/make.bash b/src/lib/math/make.bash
deleted file mode 100644
index 66062b3fa..000000000
--- a/src/lib/math/make.bash
+++ /dev/null
@@ -1,11 +0,0 @@
-# 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.
-
-#!/bin/bash
-
-set -e
-
-make install
-
-# old way: bash g1 && cp math.a $GOROOT/pkg/math.a
diff --git a/src/lib/math/math.go b/src/lib/math/math.go
deleted file mode 100644
index 9e6be9527..000000000
--- a/src/lib/math/math.go
+++ /dev/null
@@ -1,48 +0,0 @@
-// 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.
-
-package math
-
-import
-(
-	math	"asin"
-	math	"atan"
-	math	"atan2"
-	math	"exp"
-	math	"fabs"
-	math	"floor"
-	math	"fmod"
-	math	"hypot"
-	math	"log"
-	math	"pow"
-	math	"pow10"
-	math	"sin"
-	math	"sinh"
-	math	"sqrt"
-	math	"sys"
-	math	"tan"
-	math	"tanh"
-)
-
-export
-(
-	asin, acos
-	atan
-	atan2
-	exp
-	fabs
-	floor, ceil
-	fmod
-	hypot
-	log, log10
-	pow
-	pow10
-	sin, cos
-	sinh, cosh
-	sqrt
-	modf, frexp, ldexp
-	NaN, isInf, Inf
-	tan
-	tanh
-)
diff --git a/src/lib/os/Makefile b/src/lib/os/Makefile
index 130f62c86..e0ad76988 100644
--- a/src/lib/os/Makefile
+++ b/src/lib/os/Makefile
@@ -2,35 +2,47 @@
 # Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
+# DO NOT EDIT.  Automatically generated by gobuild.
+# gobuild -m os os_error.go os_file.go os_time.go
 O=6
 GC=$(O)g
+CC=$(O)c -w
+AS=$(O)a
+AR=$(O)ar
 
 PKG=$(GOROOT)/pkg/os.a
 
+install: $(PKG)
+
+nuke: clean
+	rm -f $(PKG)
+
+clean:
+	rm -f *.$O *.a
+
+%.$O: %.go
+	$(GC) $*.go
+
+%.$O: %.c
+	$(CC) $*.c
+
+%.$O: %.s
+	$(AS) $*.s
+
+
 O1=\
-	os_error.$O
+	os_error.$O\
+
 O2=\
 	os_file.$O\
 	os_time.$O\
 
-install: nuke $(PKG)
-
 $(PKG): a1 a2
-
-a1: 	$(O1)
-	$(O)ar grc $(PKG) $(O1)
-
-a2: 	$(O2)
-	$(O)ar grc $(PKG) $(O2)
+a1:	$(O1)
+	$(AR) grc $(PKG) $(O1)
+a2:	$(O2)
+	$(AR) grc $(PKG) $(O2)
 
 $(O1): nuke
 $(O2): a1
 
-nuke:
-	rm -f *.$(O) *.a $(PKG)
-
-clean:
-	rm -f *.$(O) *.a
-
-%.$O:	%.go
-	$(GC) $<
diff --git a/src/libbio/Makefile b/src/libbio/Makefile
index 02eaaa684..9123d03bd 100644
--- a/src/libbio/Makefile
+++ b/src/libbio/Makefile
@@ -61,3 +61,5 @@ y.tab.c: $(YFILES)
 clean:
 	rm -f $(OFILES) *.6 6.out $(LIB)
 
+nuke: clean
+	rm -f $(GOROOT)/lib/$(LIB)
diff --git a/src/libmach_amd64/Makefile b/src/libmach_amd64/Makefile
index 66ed283b8..de564a03b 100644
--- a/src/libmach_amd64/Makefile
+++ b/src/libmach_amd64/Makefile
@@ -82,4 +82,8 @@ $(LIB): $(OFILES)
 $(OFILES): $(HFILES)
 
 clean:
-	rm -f $(OFILES) $(LIB)
+	rm -f *.$O $(LIB)
+
+nuke: clean
+	rm -f $(GOROOT)/lib/$(LIB)
+
diff --git a/src/make.bash b/src/make.bash
index b36d515a8..037457fb8 100755
--- a/src/make.bash
+++ b/src/make.bash
@@ -8,32 +8,17 @@ export MAKEFLAGS=-j4
 
 bash clean.bash
 
-for i in lib9 libbio libmach_amd64 libregexp
-do
-	cd $i
-	make install
-	cd ..
-done
-
-for i in cmd runtime
-do
-	cd $i
-	bash make.bash
-	cd ..
-done
-
-# do these after go compiler and runtime are built
-for i in syscall
+for i in lib9 libbio libmach_amd64 libregexp cmd runtime syscall lib
 do
 	echo; echo; echo %%%% making $i %%%%; echo
 	cd $i
-	make install
+	case $i in
+	cmd | lib)
+		bash make.bash
+		;;
+	*)
+		make install
+	esac
 	cd ..
 done
 
-for i in lib
-do
-	cd $i
-	bash make.bash
-	cd ..
-done
diff --git a/src/runtime/clean.bash b/src/runtime/clean.bash
deleted file mode 100644
index a64198096..000000000
--- a/src/runtime/clean.bash
+++ /dev/null
@@ -1,11 +0,0 @@
-# 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 -ex
-
-for GOOS in linux darwin
-do
-	make nuke
-done
-
diff --git a/src/runtime/make.bash b/src/runtime/make.bash
deleted file mode 100644
index 8fa8691d9..000000000
--- a/src/runtime/make.bash
+++ /dev/null
@@ -1,9 +0,0 @@
-# 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 -ex
-
-make clean
-make install
-
diff --git a/src/lib/math/main.go b/test/math.go
index bc27e4e5d..e24421e88 100644
--- a/src/lib/math/main.go
+++ b/test/math.go
@@ -1,4 +1,4 @@
-// Copyright 2009 The Go Authors.  All rights reserved.
+// 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.
 
@@ -30,7 +30,7 @@ func	ck(a,b float64);
 func
 main()
 {
-	for i:=0; i<length; i=i+1 {
+	for i:=0; i<length; i++ {
 		f := vf[i];
 
 		ck(asin[i], math.asin(f/10));
@@ -66,7 +66,7 @@ ck(a,b float64)
 	}
 
 	if d > e {
-		panic a, " ", b, "\n";
+		panic(a, " ", b, "\n");
 	}
 }