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21 lines
930 B
C
21 lines
930 B
C
--- v8/include/v8config.h.orig 2021-11-13 11:05:57 UTC
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+++ v8/include/v8config.h
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@@ -293,7 +293,18 @@ path. Add it with -I<path> to the command line
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# define V8_HAS_CPP_ATTRIBUTE_NODISCARD (V8_HAS_CPP_ATTRIBUTE(nodiscard))
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+// Work around Clang bug present in 9.0.1, at least.
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+//
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+// Clang stores alignment as a 32-bit unsigned integer, but V8 only uses
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+// V8_ASSUME_ALIGNED() for a 4GB (2^32) alignment
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+// (kPtrComprIsolateRootAlignment). As such, the alignment overflows and
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+// becomes zero, triggering an internal Clang assertion that alignment must not
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+// be zero.
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+#if 0
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# define V8_HAS_BUILTIN_ASSUME_ALIGNED (__has_builtin(__builtin_assume_aligned))
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+#else
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+# define V8_HAS_BUILTIN_ASSUME_ALIGNED 0
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+#endif
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# define V8_HAS_BUILTIN_BSWAP16 (__has_builtin(__builtin_bswap16))
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# define V8_HAS_BUILTIN_BSWAP32 (__has_builtin(__builtin_bswap32))
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# define V8_HAS_BUILTIN_BSWAP64 (__has_builtin(__builtin_bswap64))
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