[Kernel] include finsh.h file in rtthread.h when RT_USING_FINSH enable

include/rtthread.h

@@ -563,6 +563,10 @@ void rt_assert_set_hook(void (*hook)(const char *ex, const char *func, rt_size_t
 void rt_assert_handler(const char *ex, const char *func, rt_size_t line);
 #endif /* RT_DEBUG */
 
+#ifdef RT_USING_FINSH
+#include <finsh.h>
+#endif
+
 /**@}*/
 
 #ifdef __cplusplus

tools/building.py

@@ -141,7 +141,7 @@ def PrepareBuilding(env, root_directory, has_libcpu=False, remove_components = [
         env['LIBDIRPREFIX'] = '--userlibpath '
 
     if rtconfig.PLATFORM == 'gcc':
-        if env['LINKFLAGS'].find('nano.specs'):
+        if str(env['LINKFLAGS']).find('nano.specs'):
             env.AppendUnique(CPPDEFINES = ['_REENT_SMALL'])
 
     # patch for win32 spawn