From 11ffde3d7e866e0a97f298f44a57966ff1f1e507 Mon Sep 17 00:00:00 2001
From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Thu, 19 Apr 2012 01:36:12 +0000
Subject: libc++: only #include <cxxabi.h> if it exists. This allows libc++ to
 build out of the box on Linux systems. If you're building against libc++abi,
 you still need to make sure it can find <cxxabi.h> so it knows not to export
 symbols which libc++abi provides.

llvm-svn: 155091
---
 libcxx/src/stdexcept.cpp | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'libcxx/src')

diff --git a/libcxx/src/stdexcept.cpp b/libcxx/src/stdexcept.cpp
index b516b0ca68b..9fa4f593137 100644
--- a/libcxx/src/stdexcept.cpp
+++ b/libcxx/src/stdexcept.cpp
@@ -15,7 +15,11 @@
 #include <cstdint>
 #include <cstddef>
 #include "system_error"
+
+// Use <cxxabi.h> to determine whether we're linking against libc++abi.
+#if __has_include(<cxxabi.h>)
 #include <cxxabi.h>
+#endif
 
 // Note:  optimize for size
 
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