Various tweaks to make things run on Mac OS.

The main change is the use of pthread to implement ffork.

src/lib9/Makefile

@@ -19,7 +19,7 @@ OFILES=\
 	nrand.$O\
 	qlock.$O\
 	readn.$O\
-	rendez.$O\
+	rendez-$(SYSNAME).$O\
 	strecpy.$O\
 	sysfatal.$O\
 	tas-$(OBJTYPE).$O\
@@ -31,7 +31,7 @@ OFILES=\
 	werrstr.$O\
 
 HFILES=\
-	lib9.h\
+	$(9SRC)/include/lib9.h\
 
 include $(9SRC)/Makesyslib
 

src/lib9/argv0.c

@@ -2,3 +2,8 @@
 
 char *argv0;
 
+/*
+ * Mac OS can't deal with files that only declare data.
+ * ARGBEGIN mentions this function so that this file gets pulled in.
+ */
+void __fixargv0(void) { }

src/lib9/await.c

@@ -1,5 +1,6 @@
 #include <signal.h>
 #include <sys/types.h>
+#include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/wait.h>
 #include <sys/time.h>

src/lib9/ffork-FreeBSD.c

@@ -31,3 +31,9 @@ _spinlock(spinlock_t *lk)
 	lock((Lock*)&lk->access_lock);
 }
 
+int
+getfforkid(void)
+{
+	return getpid();
+}
+

src/lib9/ffork-Linux.c

@@ -37,3 +37,9 @@ ffork(int flags, void (*fn)(void*), void *arg)
 	return pid;
 }
 
+int
+getfforkid(void)
+{
+	return getpid();
+}
+

src/lib9/lock.c

@@ -8,12 +8,9 @@ _xtas(void *v)
 {
 	int x;
 
-_ntas++;
+	_ntas++;
 	x = _tas(v);
-	if(x == 0 || x == 0xCAFEBABE)
-		return x;
-	fprint(2, "%d: tas %p got %ux\n", getpid(), v, x);
-	abort();
+	return x;
 }
 
 int

src/lib9/sysfatal.c

@@ -14,6 +14,7 @@ sysfatal(char *fmt, ...)
 	vseprint(buf, buf+sizeof buf, fmt, arg);
 	va_end(arg);
 
+	__fixargv0();
 	fprint(2, "%s; %s\n", argv0 ? argv0 : "<prog>", buf);
 	exits("fatal");
 }