Elide export symbol if we're not building libasync as a .ko.

The only time we need to build libasync as a .ko is if we want
to share the same instance of the code amongst other .ko's, for
example. Not needed right now (can just statically link the whole
library).

fast-ipc-module @ 532a1c49

-Subproject commit 2cef3d068d3ed2da556d775f8571f5c2c6b67d63
+Subproject commit 532a1c497be328260fd4f4c32e97e9bd1ab6ec2d

src/common/awe_mapper.c

@@ -23,6 +23,11 @@
 #include <lcd_config/post_hook.h>
 #endif
 
+#ifndef LINUX_KERNEL_MODULE
+#undef EXPORT_SYMBOL
+#define EXPORT_SYMBOL(x)
+#endif
+
 /*
  * NOTE: This implementation right now is just a ring buffer.
  * In the future, we probably want to change this to something

src/common/thc.c

@@ -51,6 +51,11 @@
 #undef DEBUG_STACK
 #endif
 
+#ifndef LINUX_KERNEL_MODULE
+#undef EXPORT_SYMBOL
+#define EXPORT_SYMBOL(x)
+#endif
+
 #ifdef linux
 #include <pthread.h>
 #endif

src/common/thc_ipc.c

@@ -12,6 +12,11 @@
 #include <lcd_config/post_hook.h>
 #endif
 
+#ifndef LINUX_KERNEL_MODULE
+#undef EXPORT_SYMBOL
+#define EXPORT_SYMBOL(x)
+#endif
+
 //assumes msg is a valid received message
 static int thc_recv_predicate(struct fipc_message* msg, void* data)
 {

src/common/thcsync.c

@@ -19,6 +19,11 @@
 #include <lcd_config/post_hook.h>
 #endif
 
+#ifndef LINUX_KERNEL_MODULE
+#undef EXPORT_SYMBOL
+#define EXPORT_SYMBOL(x)
+#endif
+
 #define NOT_REACHED assert(0 && "Not reached")
 #ifdef LINUX_KERNEL
 #define DEBUGPRINTF printk

src/include/thc.h

@@ -15,7 +15,6 @@
 #else
 #include <stdint.h>
 #include <stdlib.h>
-#define EXPORT_SYMBOL(x)
 #endif
 
 #ifndef BARRELFISH