m5: Expose m5 pseudo-instructions to C/C++ via a static library

Updated the util/m5/Makefile.arm so that m5op_arm.S is used to create
a static library - libm5.a. Allowing users to insert m5
psuedo-instructions into their applications for fine-grained
checkpointing, switching cpus or dumping statistics. e.g.

#include <m5op.h>

void foo(){
	...
	m5_reset_stats(<delay>,<period>)
	m5_work_begin(<workid>,<threadid>);
	...
	m5_work_end(<workid>,<threadid>);
	m5_dump_stats(<delay>,<period>);
}

1 files changed, 13 insertions, 4 deletions

diff --git a/util/m5/Makefile.thumb b/util/m5/Makefile.thumb
index 9848f5d93..5e34e77af 100644
--- a/util/m5/Makefile.thumb
+++ b/util/m5/Makefile.thumb
@@ -47,12 +47,17 @@ endif
 CC=$(CROSS_COMPILE)gcc
 AS=$(CROSS_COMPILE)as
 LD=$(CROSS_COMPILE)ld
+AR=$(CROSS_COMPILE)ar
 
 #CFLAGS=-O2 -march=armv7 -mthumb 
 CFLAGS=-O2 -mthumb 
-OBJS=m5.o m5op_arm.o
+LDFLAGS=-L. -lm5
 
-all: m5
+OBJS=m5.o
+LIB_OBJS=m5op_arm.o
+
+
+all: libm5.a m5
 
 %.o: %.S
 	$(CC) $(CFLAGS) -o $@ -c $<
@@ -61,7 +66,11 @@ all: m5
 	$(CC)  $(CFLAGS) -o $@ -c $<
 
 m5: $(OBJS)
-	$(CC) -o $@ -march=armv7 -mthumb $(OBJS)
+	$(CC) -o $@ -march=armv7 -mthumb $(OBJS) $(LDFLAGS)
+
+libm5.a: $(LIB_OBJS)
+	$(AR) rcs $@ $<
+
 
 clean:
-	rm -f *.o m5
+	rm -f *.o m5 libm5.a