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-rw-r--r--compiler-rt/lib/sanitizer_common/sanitizer_printf.cc4
1 files changed, 4 insertions, 0 deletions
diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_printf.cc b/compiler-rt/lib/sanitizer_common/sanitizer_printf.cc
index fb049657116..8018131245b 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_printf.cc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_printf.cc
@@ -22,6 +22,10 @@
#include <stdio.h>
#include <stdarg.h>
+#if SANITIZER_WINDOWS && !defined(va_copy)
+# define va_copy(dst, src) ((dst) = (src))
+#endif
+
namespace __sanitizer {
StaticSpinMutex CommonSanitizerReportMutex;
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