Wrap LIBCXXABI_USE_LLVM_UNWINDER with defined().

This commit fixes -Wundef by replacing:

    #if !LIBCXXABI_USE_LLVM_UNWINDER

with:

    #if !defined(LIBCXXABI_USE_LLVM_UNWINDER)

llvm-svn: 280251

diff --git a/libcxxabi/src/cxa_personality.cpp b/libcxxabi/src/cxa_personality.cpp
index 85b6df2..0b75a1c 100644 (file)
--- a/libcxxabi/src/cxa_personality.cpp
+++ b/libcxxabi/src/cxa_personality.cpp
@@ -1035,7 +1035,7 @@ static _Unwind_Reason_Code continue_unwind(_Unwind_Exception* unwind_exception,
 }
 
 // ARM register names
-#if !LIBCXXABI_USE_LLVM_UNWINDER
+#if !defined(LIBCXXABI_USE_LLVM_UNWINDER)
 static const uint32_t REG_UCB = 12;  // Register to save _Unwind_Control_Block
 #endif
 static const uint32_t REG_SP = 13;
@@ -1071,7 +1071,7 @@ __gxx_personality_v0(_Unwind_State state,
     bool native_exception = (unwind_exception->exception_class & get_vendor_and_language) ==
                             (kOurExceptionClass & get_vendor_and_language);
 
-#if !LIBCXXABI_USE_LLVM_UNWINDER
+#if !defined(LIBCXXABI_USE_LLVM_UNWINDER)
     // Copy the address of _Unwind_Control_Block to r12 so that
     // _Unwind_GetLanguageSpecificData() and _Unwind_GetRegionStart() can
     // return correct address.