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-rw-r--r--lib/Target/CBackend/CBackend.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index cbdca3cb5c..a7c2bd5fc2 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -664,7 +664,7 @@ void CWriter::writeOperand(Value *Operand) {
static void generateCompilerSpecificCode(std::ostream& Out) {
// Alloca is hard to get, and we don't want to include stdlib.h here...
Out << "/* get a declaration for alloca */\n"
- << "#if defined(sun) || defined(__CYGWIN__)\n"
+ << "#if defined(sun) || defined(__CYGWIN__) || defined(__APPLE__)\n"
<< "extern void *__builtin_alloca(unsigned long);\n"
<< "#define alloca(x) __builtin_alloca(x)\n"
<< "#else\n"