[cfe-commits] r147466 - /cfe/trunk/lib/Headers/unwind.h

[Joerg Sonnenberger]

Author: joerg
Date: Tue Jan  3 13:22:38 2012
New Revision: 147466

URL: http://llvm.org/viewvc/llvm-project?rev=147466&view=rev
Log:
Don't depend on undefined macros being 0, there are options for the
preprocessor to warn about it.

Modified:
    cfe/trunk/lib/Headers/unwind.h

Modified: cfe/trunk/lib/Headers/unwind.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Headers/unwind.h?rev=147466&r1=147465&r2=147466&view=diff
==============================================================================
--- cfe/trunk/lib/Headers/unwind.h (original)
+++ cfe/trunk/lib/Headers/unwind.h Tue Jan  3 13:22:38 2012
@@ -23,7 +23,8 @@
 
 /* See "Data Definitions for libgcc_s" in the Linux Standard Base.*/
 
-#if __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >=  1070
+#if defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \
+    __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >=  1070
 /* Starting in OS X Lion the SDK includes a unwind.h. We should just use it. */
 #include_next <unwind.h>
 #else