lib9, libmach, cmd/dist, go/build: add support for GOOS=solaris

This change adds solaris to the list of supported operating
systems and allows cmd/dist to be built on Solaris.

This CL has to come first because we want the tools to ignore
solaris-specific files until the whole port is integrated.

R=golang-codereviews, jsing, rsc, minux.ma
CC=golang-codereviews
https://golang.org/cl/35900045

src/cmd/dist/build.c

@@ -52,6 +52,7 @@ static char *okgoos[] = {
 	"darwin",
 	"dragonfly",
 	"linux",
+	"solaris",
 	"freebsd",
 	"netbsd",
 	"openbsd",

src/cmd/dist/unix.c

@@ -24,6 +24,7 @@
 #include <errno.h>
 #include <stdarg.h>
 #include <setjmp.h>
+#include <signal.h>
 
 // bprintf replaces the buffer with the result of the printf formatting
 // and returns a pointer to the NUL-terminated buffer contents.
@@ -686,6 +687,14 @@ main(int argc, char **argv)
 	gohostos = "openbsd";
 #elif defined(__NetBSD__)
 	gohostos = "netbsd";
+#elif defined(__sun) && defined(__SVR4)
+	gohostos = "solaris";
+	// Even on 64-bit platform, solaris uname -m prints i86pc.
+	run(&b, nil, 0, "isainfo", "-n", nil);
+	if(contains(bstr(&b), "amd64"))
+		gohostarch = "amd64";
+	if(contains(bstr(&b), "i386"))
+		gohostarch = "386";
 #else
 	fatal("unknown operating system");
 #endif

src/lib9/run_unix.c

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin dragonfly freebsd linux netbsd openbsd
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
 
 #include <u.h>
 #include <errno.h>

src/lib9/tempdir_unix.c

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin dragonfly freebsd linux netbsd openbsd
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris
 
 #include <u.h>
 #include <dirent.h>

src/libmach/solaris.c

@@ -0,0 +1,56 @@
+// This is stubbed out for the moment. Will revisit when the time comes.
+#include <u.h>
+#include <libc.h>
+#include <bio.h>
+#include <mach.h>
+
+int
+ctlproc(int pid, char *msg)
+{
+	USED(pid);
+	USED(msg);
+	sysfatal("ctlproc unimplemented in Solaris");
+	return -1;
+}
+
+char*
+proctextfile(int pid)
+{
+	USED(pid);
+	sysfatal("proctextfile unimplemented in Solaris");
+	return nil;
+}
+
+char*
+procstatus(int pid)
+{
+	USED(pid);
+	sysfatal("procstatus unimplemented in Solaris");
+	return nil;
+}
+
+Map*
+attachproc(int pid, Fhdr *fp)
+{
+	USED(pid);
+	USED(fp);
+	sysfatal("attachproc unimplemented in Solaris");
+	return nil;
+}
+
+void
+detachproc(Map *m)
+{
+	USED(m);
+	sysfatal("detachproc unimplemented in Solaris");
+}
+
+int
+procthreadpids(int pid, int *p, int np)
+{
+	USED(pid);
+	USED(p);
+	USED(np);
+	sysfatal("procthreadpids unimplemented in Solaris");
+	return -1;
+}

src/pkg/go/build/deps_test.go

@@ -359,7 +359,7 @@ func allowed(pkg string) map[string]bool {
 }
 
 var bools = []bool{false, true}
-var geese = []string{"darwin", "dragonfly", "freebsd", "linux", "netbsd", "openbsd", "plan9", "windows"}
+var geese = []string{"darwin", "dragonfly", "freebsd", "linux", "netbsd", "openbsd", "plan9", "solaris", "windows"}
 var goarches = []string{"386", "amd64", "arm"}
 
 type osPkg struct {

src/pkg/go/build/syslist.go

@@ -4,5 +4,5 @@
 
 package build
 
-const goosList = "darwin dragonfly freebsd linux netbsd openbsd plan9 windows "
+const goosList = "darwin dragonfly freebsd linux netbsd openbsd plan9 solaris windows "
 const goarchList = "386 amd64 arm "