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-rw-r--r--src/liblzma/common/memcmplen.h10
1 files changed, 10 insertions, 0 deletions
diff --git a/src/liblzma/common/memcmplen.h b/src/liblzma/common/memcmplen.h
index 5372cfa8..db3fff60 100644
--- a/src/liblzma/common/memcmplen.h
+++ b/src/liblzma/common/memcmplen.h
@@ -19,6 +19,16 @@
# include <immintrin.h>
#endif
+// Only include <intrin.h> if it is needed. The header is only needed
+// on Windows when using an MSVC compatible compiler. The Intel compiler
+// can use the intrinsics without the header file.
+#if defined(TUKLIB_FAST_UNALIGNED_ACCESS) \
+ && (defined(_MSC_VER) \
+ && defined(_M_X64) \
+ && !defined(__INTEL_COMPILER))
+# include <intrin.h>
+#endif
+
/// Find out how many equal bytes the two buffers have.
///