configure : add option --enable-rusage

kernel/Makefile.build.in

@@ -1,3 +1,4 @@
+ENABLE_RUSAGE=@ENABLE_RUSAGE@
 VPATH=@abs_srcdir@
 SRC=$(VPATH)
 IHKDIR=$(IHKBASE)/$(TARGETDIR)
@@ -5,8 +6,12 @@ OBJS = init.o mem.o debug.o mikc.o listeners.o ap.o syscall.o cls.o host.o
 OBJS += process.o copy.o waitq.o futex.o timer.o plist.o fileobj.o shmobj.o
 OBJS += zeroobj.o procfs.o devobj.o sysfs.o xpmem.o rusage.o freeze.o
 DEPSRCS=$(wildcard $(SRC)/*.c)
+DOPT=
+ifeq ($(ENABLE_RUSAGE),yes)
+DOPT=-DENABLE_RUSAGE
+endif
 
-CFLAGS += -I$(SRC)/include -D__KERNEL__ -g -fno-omit-frame-pointer -fno-inline -fno-inline-small-functions
+CFLAGS += -I$(SRC)/include -D__KERNEL__ $(DOPT) -g -fno-omit-frame-pointer -fno-inline -fno-inline-small-functions
 LDFLAGS += -e arch_start
 IHKOBJ = ihk/ihk.o
 

kernel/freeze.c

@@ -5,7 +5,7 @@
 #include <cls.h>
 
 extern int nmi_mode;
-extern mod_nmi_ctx(void *, void(*)());
+extern void mod_nmi_ctx(void *, void(*)());
 extern void lapic_ack();
 extern void __freeze();
 

kernel/include/rusage.h

@@ -1,8 +1,6 @@
 #ifndef __RUSAGE_H
 #define __RUSAGE_H
 
-#define ENABLE_RUSAGE
-
 #define RUSAGE_DEFAULT_SIZE 10
 
 enum RUSAGE_MEMBER {