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@@ -72,6 +72,10 @@
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#endif
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#endif
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#endif /* WIN32_VC */
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#endif /* WIN32_VC */
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+#ifndef __has_builtin
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+#define __has_builtin(x) 0
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+#endif
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+
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// Use NODEFAULT to optimize a switch() stmt to tell MSVC to automatically go
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// Use NODEFAULT to optimize a switch() stmt to tell MSVC to automatically go
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// to the final untested case after it has failed all the other cases (i.e.
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// to the final untested case after it has failed all the other cases (i.e.
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// 'assume at least one of the cases is always true')
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// 'assume at least one of the cases is always true')
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@@ -79,7 +83,7 @@
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#define NODEFAULT default: assert(0); break;
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#define NODEFAULT default: assert(0); break;
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#elif defined(_MSC_VER)
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#elif defined(_MSC_VER)
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#define NODEFAULT default: __assume(0); // special VC keyword
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#define NODEFAULT default: __assume(0); // special VC keyword
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-#elif __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) || (defined(__has_builtin) && __has_builtin(__builtin_unreachable))
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+#elif __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 5) || __has_builtin(__builtin_unreachable)
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#define NODEFAULT default: __builtin_unreachable();
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#define NODEFAULT default: __builtin_unreachable();
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#else
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#else
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#define NODEFAULT
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#define NODEFAULT
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