make -> mk

remove clumsy stack hack.
fix exec.
fix nthreads maintenance.
fix threadexitsall not to kill self.
add sun support.

src/libthread/mkfile

@@ -0,0 +1,52 @@
+PLAN9=../..
+<$PLAN9/src/mkhdr
+
+LIB=libthread.a
+
+OFILES=\
+	$OBJTYPE.$O\
+	asm-$SYSNAME-$OBJTYPE.$O\
+	channel.$O\
+	chanprint.$O\
+	create.$O\
+	debug.$O\
+	exec-unix.$O\
+	exit.$O\
+	getpid.$O\
+	id.$O\
+	iocall.$O\
+	ioclose.$O\
+	ioopen.$O\
+	ioproc.$O\
+	ioread.$O\
+	ioreadn.$O\
+	iowrite.$O\
+	kill.$O\
+	lib.$O\
+	main.$O\
+	memset.$O\
+	memsetd.$O\
+	note.$O\
+	proctab.$O\
+	ref.$O\
+	rendez.$O\
+	sched.$O\
+
+HFILES=\
+	$PLAN9/include/thread.h\
+	label.h\
+	threadimpl.h\
+
+<$PLAN9/src/mksyslib
+
+tprimes: tprimes.$O $PLAN9/lib/$LIB
+	$LD -o tprimes tprimes.$O $LDFLAGS -lthread -l9 -lfmt -lutf
+
+texec: texec.$O $PLAN9/lib/$LIB
+	$LD -o texec texec.$O $LDFLAGS -lthread -l9 -lfmt -lutf
+
+trend: trend.$O $PLAN9/lib/$LIB
+	$LD -o trend trend.$O $LDFLAGS -lthread -l9 -lfmt -lutf
+
+CLEANFILES=$CLEANFILES tprimes texec
+