3 files changed, 19 insertions, 0 deletions
diff --git a/Lisp/libobjcl.lisp b/Lisp/libobjcl.lisp
index a726db8..752dcf4 100644
--- a/Lisp/libobjcl.lisp
+++ b/Lisp/libobjcl.lisp
@@ -83,6 +83,8 @@
 
 (defcfun ("objcl_get_runtime_type" %objcl-get-runtime-type) :string)
 
+(defcfun ("objcl_objc2_p" %objcl-objc2-p) :int)
+
 (defcfun ("objcl_sizeof_type" %objcl-sizeof-type) :long
   (typespec :string))
 
@@ -678,3 +680,6 @@ separating parts by hyphens works nicely in all of the `:INVERT`,
             runtime)
     (cond ((string= runtime "GNU") :gnu)
           ((string= runtime "NeXT") :next))))
+
+(defun objc-2.0-runtime-p ()
+  (not (zerop (%objcl-objc2-p))))
diff --git a/Objective-C/libobjcl.h b/Objective-C/libobjcl.h
index e5a70f1..9008c9e 100644
--- a/Objective-C/libobjcl.h
+++ b/Objective-C/libobjcl.h
@@ -104,6 +104,9 @@ objcl_get_no (void);
 const char *
 objcl_get_runtime_type (void);
 
+int
+objcl_objc2_p (void);
+
 long
 objcl_sizeof_type (const char *typespec);
 
diff --git a/Objective-C/libobjcl.m b/Objective-C/libobjcl.m
index 58baf67..3fc2300 100644
--- a/Objective-C/libobjcl.m
+++ b/Objective-C/libobjcl.m
@@ -331,6 +331,17 @@ objcl_get_runtime_type (void)
 }
 
 
+int
+objcl_objc2_p (void)
+{
+#ifdef __OBJC2__
+  return 1;
+#else
+  return 0;
+#endif
+}
+
+
 long
 objcl_sizeof_type (const char *typespec)
 {