With this change, global variable _fltused will not be removed by LTO
Signed-off-by: Liming Gao <liming....@intel.com>
---
CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c
b/CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c
index 6e4d4a68cc..94fe341bec 100644
--- a/CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c
+++ b/CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c
@@ -2,7 +2,7 @@
Intrinsic Memory Routines Wrapper Implementation for OpenSSL-based
Cryptographic Library.
-Copyright (c) 2010 - 2018, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2010 - 2019, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
@@ -13,9 +13,15 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
typedef UINTN size_t;
+#if defined(__GNUC__) || defined(__clang__)
+ #define GLOBAL_USED __attribute__((used))
+#else
+ #define GLOBAL_USED
+#endif
+
/* OpenSSL will use floating point support, and C compiler produces the
_fltused
symbol by default. Simply define this symbol here to satisfy the linker. */
-int _fltused = 1;
+int GLOBAL_USED _fltused = 1;
/* Sets buffers to a specified character */
void * memset (void *dest, int ch, size_t count)
--
2.13.0.windows.1
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