Fix cyclic dependency between libserver.a and libbox.a

Spent couple hours to figure it out.

src/box/lua/call.h

@@ -49,6 +49,9 @@ boxffi_select(struct port *port, uint32_t space_id, uint32_t index_id,
 char *
 lbox_encode_tuple_on_gc(struct lua_State *L, int idx, size_t *p_len);
 
+void
+box_lua_init(struct lua_State *L);
+
 #if defined(__cplusplus)
 } /* extern "C" */
 

src/lua/init.c

@@ -58,14 +58,6 @@
 #include <readline/readline.h>
 #include <readline/history.h>
 
-/**
- * This is a callback used by tarantool_lua_init() to open
- * module-specific libraries into given Lua state.
- *
- * No return value, panics if error.
- */
-extern void box_lua_init(struct lua_State *L);
-
 /**
  * The single Lua state of the transaction processor (tx) thread.
  */
@@ -430,8 +422,6 @@ tarantool_lua_init(const char *tarantool_bin, int argc, char **argv)
 	luaopen_tarantool(L);
 	lua_pop(L, 1);
 
-	box_lua_init(L);
-
 	lua_newtable(L);
 	lua_pushinteger(L, -1);
 	lua_pushstring(L, tarantool_bin);

src/lua/init.h

@@ -41,6 +41,8 @@ struct lua_State;
 struct luaL_Reg;
 extern bool start_loop;
 
+extern struct lua_State *tarantool_L;
+
 /**
  * Create an instance of Lua interpreter and load it with
  * Tarantool modules.  Creates a Lua state, imports global

src/main.cc

@@ -71,6 +71,7 @@
 #include <readline/history.h>
 #include "title.h"
 #include <libutil.h>
+#include "box/lua/call.h" /* box_lua_init() */
 
 static pid_t master_pid = getpid();
 static struct pidfh *pid_file_handle;
@@ -630,6 +631,7 @@ main(int argc, char **argv)
 	coeio_init();
 	signal_init();
 	tarantool_lua_init(tarantool_bin, main_argc, main_argv);
+	box_lua_init(tarantool_L);
 
 	/* main core cleanup routine */
 	atexit(tarantool_free);