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-rw-r--r--compiler-rt/lib/profile/InstrProfilingUtil.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/compiler-rt/lib/profile/InstrProfilingUtil.c b/compiler-rt/lib/profile/InstrProfilingUtil.c
index 0fae91c..a9d9df8 100644
--- a/compiler-rt/lib/profile/InstrProfilingUtil.c
+++ b/compiler-rt/lib/profile/InstrProfilingUtil.c
@@ -12,6 +12,11 @@
#include <windows.h>
#include "WindowsMMap.h"
#else
+#if defined(__linux__)
+// For fdopen(), fileno(), getpagesize(), madvise()
+#define _DEFAULT_SOURCE
+#endif
+
#include <errno.h>
#include <fcntl.h>
#include <sys/file.h>