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, 7 insertions, 0 deletions

diff --git a/util/m5/m5op.h b/util/m5/m5op.h
index 4e1d0b638..9e693258e 100644
--- a/util/m5/m5op.h
+++ b/util/m5/m5op.h
@@ -32,6 +32,10 @@
 #ifndef __M5OP_H__
 #define __M5OP_H__
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #include <stdint.h>
 
 void arm(uint64_t address);
@@ -79,4 +83,7 @@ uint64_t m5a_getid(void);
 #define M5_AN_FL_LINK   0x10
 #define M5_AN_FL_RESET  0x20
 
+#ifdef __cplusplus
+}
+#endif
 #endif // __M5OP_H__