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-rw-r--r--src/_cffi_src/openssl/src/osrandom_engine.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/_cffi_src/openssl/src/osrandom_engine.h b/src/_cffi_src/openssl/src/osrandom_engine.h
index c400ea3e..077046d9 100644
--- a/src/_cffi_src/openssl/src/osrandom_engine.h
+++ b/src/_cffi_src/openssl/src/osrandom_engine.h
@@ -13,6 +13,9 @@
#ifdef __APPLE__
#include <sys/random.h>
+ /* To support weak linking we need to declare this as a weak import even if
+ * it's not present in sys/random (e.g. macOS < 10.12). */
+ extern int getentropy(void *buffer, size_t size) __attribute((weak_import));
#endif
#ifdef __linux__