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-rw-r--r--clang/lib/Headers/opencl-c-base.h11
1 files changed, 10 insertions, 1 deletions
diff --git a/clang/lib/Headers/opencl-c-base.h b/clang/lib/Headers/opencl-c-base.h
index 2b7f504..6206a34 100644
--- a/clang/lib/Headers/opencl-c-base.h
+++ b/clang/lib/Headers/opencl-c-base.h
@@ -697,7 +697,16 @@ template <typename _Tp> struct __remove_address_space<__constant _Tp> {
#if defined(__OPENCL_CPP_VERSION__) || (__OPENCL_C_VERSION__ >= CL_VERSION_1_2)
// OpenCL v1.2 s6.12.13, v2.0 s6.13.13 - printf
-int printf(__constant const char* st, ...) __attribute__((format(printf, 1, 2)));
+#ifdef __OPENCL_CPP_VERSION__
+#define CLINKAGE extern "C"
+#else
+#define CLINKAGE
+#endif
+
+CLINKAGE int printf(__constant const char *st, ...)
+ __attribute__((format(printf, 1, 2)));
+
+#undef CLINKAGE
#endif
#ifdef cl_intel_device_side_avc_motion_estimation