lib9: enable on Plan 9

This change depends on CL 57170052.

LGTM=rsc
R=rsc, bradfitz
CC=golang-codereviews
https://golang.org/cl/60840049

.hgignore

@@ -25,6 +25,7 @@ build.out
 test.out
 doc/tmpltohtml
 doc/articles/wiki/*.bin
+include/plan9/libc_plan9.h
 misc/cgo/life/run.out
 misc/cgo/stdio/run.out
 misc/cgo/testso/main

include/plan9/errno.h

+// Copyright 2014 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.
+
+int errno;
+
+#define ERANGE 1001

include/plan9/fmt.h

+// Copyright 2014 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 "../fmt.h"
+
+#pragma	varargck	argpos	fmtprint	2
+#pragma	varargck	argpos	fprint		2
+#pragma	varargck	argpos	print		1
+#pragma	varargck	argpos	runeseprint	3
+#pragma	varargck	argpos	runesmprint	1
+#pragma	varargck	argpos	runesnprint	3
+#pragma	varargck	argpos	runesprint	2
+#pragma	varargck	argpos	seprint		3
+#pragma	varargck	argpos	smprint		1
+#pragma	varargck	argpos	snprint		3
+#pragma	varargck	argpos	sprint		2
+
+#pragma	varargck	type	"lld"	vlong
+#pragma	varargck	type	"llo"	vlong
+#pragma	varargck	type	"llx"	vlong
+#pragma	varargck	type	"llb"	vlong
+#pragma	varargck	type	"lld"	uvlong
+#pragma	varargck	type	"llo"	uvlong
+#pragma	varargck	type	"llx"	uvlong
+#pragma	varargck	type	"llb"	uvlong
+#pragma	varargck	type	"ld"	long
+#pragma	varargck	type	"lo"	long
+#pragma	varargck	type	"lx"	long
+#pragma	varargck	type	"lb"	long
+#pragma	varargck	type	"ld"	ulong
+#pragma	varargck	type	"lo"	ulong
+#pragma	varargck	type	"lx"	ulong
+#pragma	varargck	type	"lb"	ulong
+#pragma	varargck	type	"d"	int
+#pragma	varargck	type	"o"	int
+#pragma	varargck	type	"x"	int
+#pragma	varargck	type	"c"	int
+#pragma	varargck	type	"C"	int
+#pragma	varargck	type	"b"	int
+#pragma	varargck	type	"d"	uint
+#pragma	varargck	type	"x"	uint
+#pragma	varargck	type	"c"	uint
+#pragma	varargck	type	"C"	uint
+#pragma	varargck	type	"b"	uint
+#pragma	varargck	type	"f"	double
+#pragma	varargck	type	"e"	double
+#pragma	varargck	type	"g"	double
+#pragma	varargck	type	"s"	char*
+#pragma	varargck	type	"q"	char*
+#pragma	varargck	type	"S"	Rune*
+#pragma	varargck	type	"Q"	Rune*
+#pragma	varargck	type	"r"	void
+#pragma	varargck	type	"%"	void
+#pragma	varargck	type	"n"	int*
+#pragma	varargck	type	"p"	uintptr
+#pragma	varargck	type	"p"	void*
+#pragma	varargck	flag	','
+#pragma	varargck	flag	' '
+#pragma	varargck	flag	'h'
+#pragma	varargck	type	"<"	void*
+#pragma	varargck	type	"["	void*
+#pragma	varargck	type	"H"	void*
+#pragma	varargck	type	"lH"	void*

include/plan9/libc.h

@@ -2,8 +2,10 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-#include "/sys/include/libc.h"
 #include "/sys/include/ctype.h"
+#include "fmt.h"
+#include "utf.h"
+#include "libc_plan9.h"
 
 char*	getgoos(void);
 char*	getgoarch(void);
@@ -26,3 +28,6 @@ void	flagprint(int);
 // The libraries use size_t to avoid -Wconversion warnings from GCC
 // when calling standard library functions like memcpy.
 typedef unsigned long size_t;
+
+// math.h
+#define HUGE_VAL 1.79769313486231e+308

include/plan9/mklibc.rc

+#!/bin/rc
+
+pattern='/umuldiv/d
+	/UTFmax/d
+	/Runesync/d
+	/Runeself/d
+	/Runeerror/d
+	/Runemax/d
+	/rune routines/,/^\/\*/d
+	/print routines/,/^\/\*/d
+	/error string for/,/^\/\*/d'
+
+sed -e $pattern /sys/include/libc.h

include/plan9/stdarg.h

+// Copyright 2014 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/plan9/utf.h

+// Copyright 2014 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 "../utf.h"

src/cmd/dist/build.c

@@ -968,13 +968,15 @@ install(char *dir)
 					vadd(&compile, "-m64");
 				else if(streq(gohostarch, "386"))
 					vadd(&compile, "-m32");
-				if(streq(dir, "lib9"))
-					vadd(&compile, "-DPLAN9PORT");
 	
 				vadd(&compile, "-I");
 				vadd(&compile, bpathf(&b, "%s/include", goroot));
 			}
 
+			if(streq(dir, "lib9"))
+				vadd(&compile, "-DPLAN9PORT");
+
+
 			vadd(&compile, "-I");
 			vadd(&compile, bstr(&path));
 
@@ -1159,19 +1161,6 @@ shouldbuild(char *file, char *dir)
 	int i, j, ret;
 	Buf b;
 	Vec lines, fields;
-
-	// On Plan 9, most of the libraries are already present.
-	// The main exception is libmach which has been modified
-	// in various places to support Go object files.
-	if(streq(gohostos, "plan9")) {
-		if(streq(dir, "lib9")) {
-			name = lastelem(file);
-			if(streq(name, "goos.c") || streq(name, "flag.c"))
-				return 1;
-			if(!contains(name, "plan9"))
-				return 0;
-		}
-	}
 	
 	// Check file name for GOOS or GOARCH.
 	name = lastelem(file);

src/lib9/_exits.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/_exits.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/_exits.c

src/lib9/_p9dir.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/_p9dir.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/_p9dir.c

src/lib9/atoi.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/ato*.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/atoi.c

src/lib9/await.c

+// +build !plan9
 // +build !windows
 
 /*

src/lib9/cleanname.c

+// +build !plan9
+
 /*
 Inferno libkern/cleanname.c
 http://code.google.com/p/inferno-os/source/browse/libkern/cleanname.c

src/lib9/create.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/create.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/create.c

src/lib9/ctime.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build !plan9
+
 #define NOPLAN9DEFINES
 #include <u.h>
 #include <libc.h>

src/lib9/dirfstat.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/dirfstat.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/dirfstat.c

src/lib9/dirfwstat.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/dirfwstat.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/dirfwstat.c

src/lib9/dirstat.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/dirstat.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/dirstat.c

src/lib9/dirwstat.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/dirwstat.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/dirwstat.c

src/lib9/dup.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/dup.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/dup.c

src/lib9/exec.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/exec.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/exec.c

src/lib9/execl.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/execl.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/execl.c

src/lib9/exitcode.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/exitcode.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/exitcode.c

src/lib9/exits.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/_exits.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/_exits.c

src/lib9/fmtlock2.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/fmtlock2.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/fmtlock2.c

src/lib9/getenv.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/getenv.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/getenv.c

src/lib9/getwd.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/getwd.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/getwd.c

src/lib9/jmp.c

+// +build !plan9
 // +build !windows
 
 /*

src/lib9/main.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/main.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/main.c

src/lib9/nan.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/nan.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/nan.c

src/lib9/notify.c

+// +build !plan9
 // +build !windows
 
 /*

src/lib9/nulldir.c

+// +build !plan9
+
 /*
 Inferno lib9/nulldir.c
 http://code.google.com/p/inferno-os/source/browse/lib9/nulldir.c

src/lib9/open.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/open.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/open.c

src/lib9/readn.c

+// +build !plan9
+
 /*
 Inferno lib9/readn.c
 http://code.google.com/p/inferno-os/source/browse/lib9/readn.c

src/lib9/rfork.c

+// +build !plan9
 // +build !windows
 
 /*

src/lib9/run_plan9.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build plan9
+
 #include <u.h>
 #include <libc.h>
 

src/lib9/seek.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/seek.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/seek.c

src/lib9/strecpy.c

+// +build !plan9
+
 /*
 Inferno lib9/strecpy.c
 http://code.google.com/p/inferno-os/source/browse/lib9/strecpy.c

src/lib9/sysfatal.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/sysfatal.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/sysfatal.c

src/lib9/tempdir_plan9.c

@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build plan9
+
 #include <u.h>
 #include <libc.h>
 

src/lib9/time.c

+// +build !plan9
+
 /*
 Plan 9 from User Space src/lib9/time.c
 http://code.swtch.com/plan9port/src/tip/src/lib9/time.c

src/lib9/tokenize.c

+// +build !plan9
+
 /*
 Inferno lib9/tokenize.c
 http://code.google.com/p/inferno-os/source/browse/lib9/tokenize.c

src/libbio/bprint.c

@@ -67,9 +67,7 @@ Bvprint(Biobuf *bp, char *fmt, va_list arg)
 	Fmt f;
 	
 	memset(&f, 0, sizeof f);
-#ifndef PLAN9
 	fmtlocaleinit(&f, nil, nil, nil);
-#endif
 	f.stop = bp->ebuf;
 	f.to = (char*)f.stop + bp->ocount;
 	f.flush = bflush;

src/make.rc

@@ -36,6 +36,9 @@ if(! test -f run.rc){
 	exit wrongdir
 }
 
+# Generate libc_plan9.h.
+../include/plan9/mklibc.rc > ../include/plan9/libc_plan9.h
+
 # Clean old generated file that will cause problems in the build.
 rm -f ./pkg/runtime/runtime_defs.go