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diff --git a/src/crc32c/src/crc32c_config.h.in b/src/crc32c/src/crc32c_config.h.in
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+++ b/src/crc32c/src/crc32c_config.h.in
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+// Copyright 2017 The CRC32C Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file. See the AUTHORS file for names of contributors.
+
+#ifndef CRC32C_CRC32C_CONFIG_H_
+#define CRC32C_CRC32C_CONFIG_H_
+
+// Define to 1 if building for a big-endian platform.
+#cmakedefine01 BYTE_ORDER_BIG_ENDIAN
+
+// Define to 1 if the compiler has the __builtin_prefetch intrinsic.
+#cmakedefine01 HAVE_BUILTIN_PREFETCH
+
+// Define to 1 if targeting X86 and the compiler has the _mm_prefetch intrinsic.
+#cmakedefine01 HAVE_MM_PREFETCH
+
+// Define to 1 if targeting X86 and the compiler has the _mm_crc32_u{8,32,64}
+// intrinsics.
+#cmakedefine01 HAVE_SSE42
+
+// Define to 1 if targeting ARM and the compiler has the __crc32c{b,h,w,d} and
+// the vmull_p64 intrinsics.
+#cmakedefine01 HAVE_ARM64_CRC32C
+
+// Define to 1 if the system libraries have the getauxval function in the
+// <sys/auxv.h> header. Should be true on Linux and Android API level 20+.
+#cmakedefine01 HAVE_STRONG_GETAUXVAL
+
+// Define to 1 if the compiler supports defining getauxval as a weak symbol.
+// Should be true for any compiler that supports __attribute__((weak)).
+#cmakedefine01 HAVE_WEAK_GETAUXVAL
+
+// Define to 1 if CRC32C tests have been built with Google Logging.
+#cmakedefine01 CRC32C_TESTS_BUILT_WITH_GLOG
+
+#endif  // CRC32C_CRC32C_CONFIG_H_