Add guard for old clangs

mborland · mborland · commit faf121b48c75 · 2026-06-23T16:13:19.000-04:00
diff --git a/include/boost/safe_numbers/detail/signed_integer_basis.hpp b/include/boost/safe_numbers/detail/signed_integer_basis.hpp
@@ -1462,6 +1462,9 @@ BOOST_SAFE_NUMBERS_HOST_DEVICE constexpr auto signed_underflow_mul_msg() noexcep
         return "Underflow detected in i128 multiplication";
     }
 }
+#if BOOST_SAFE_NUMBERS_HAS_BUILTIN(__builtin_mul_overflow) && defined(BOOST_SAFE_NUMBERS_DETAIL_INT128_HAS_INT128) && (!defined(__clang__) || __clang_major__ >= 14)
+#  define BOOST_SAFE_NUMBERS_HAS_INT128_SIGNED_INTRIN_MUL
+#endif
 
 #if BOOST_SAFE_NUMBERS_HAS_BUILTIN(__builtin_mul_overflow)
 
@@ -1476,7 +1479,7 @@ auto signed_intrin_mul(const T lhs, const T rhs, T& result) -> signed_overflow_s
     return signed_overflow_status::no_error;
 }
 
-#ifdef BOOST_SAFE_NUMBERS_DETAIL_INT128_HAS_INT128
+#ifdef BOOST_SAFE_NUMBERS_HAS_INT128_SIGNED_INTRIN_MUL
 
 inline auto signed_intrin_mul(const int128::int128_t lhs, const int128::int128_t rhs, int128::int128_t& result) -> signed_overflow_status
 {
@@ -1492,7 +1495,7 @@ inline auto signed_intrin_mul(const int128::int128_t lhs, const int128::int128_t
     return signed_overflow_status::no_error;
 }
 
-#endif // BOOST_SAFE_NUMBERS_DETAIL_INT128_HAS_INT128
+#endif // BOOST_SAFE_NUMBERS_HAS_INT128_SIGNED_INTRIN_MUL
 
 #elif defined(BOOST_SAFENUMBERS_HAS_WINDOWS_X64_INTRIN) || defined(BOOST_SAFENUMBERS_HAS_WINDOWS_X86_INTRIN)
 

Original file line number	Diff line number	Diff line change
`@@ -1462,6 +1462,9 @@ BOOST_SAFE_NUMBERS_HOST_DEVICE constexpr auto signed_underflow_mul_msg() noexcep`
`1462`	`1462`	`return "Underflow detected in i128 multiplication";`
`1463`	`1463`	`}`
`1464`	`1464`	`}`
	`1465`	`+#if BOOST_SAFE_NUMBERS_HAS_BUILTIN(__builtin_mul_overflow) && defined(BOOST_SAFE_NUMBERS_DETAIL_INT128_HAS_INT128) && (!defined(__clang__) \|\| __clang_major__ >= 14)`
	`1466`	`+# define BOOST_SAFE_NUMBERS_HAS_INT128_SIGNED_INTRIN_MUL`
	`1467`	`+#endif`
`1465`	`1468`
`1466`	`1469`	`#if BOOST_SAFE_NUMBERS_HAS_BUILTIN(__builtin_mul_overflow)`
`1467`	`1470`
`@@ -1476,7 +1479,7 @@ auto signed_intrin_mul(const T lhs, const T rhs, T& result) -> signed_overflow_s`
`1476`	`1479`	`return signed_overflow_status::no_error;`
`1477`	`1480`	`}`
`1478`	`1481`
`1479`		`-#ifdef BOOST_SAFE_NUMBERS_DETAIL_INT128_HAS_INT128`
	`1482`	`+#ifdef BOOST_SAFE_NUMBERS_HAS_INT128_SIGNED_INTRIN_MUL`
`1480`	`1483`
`1481`	`1484`	`inline auto signed_intrin_mul(const int128::int128_t lhs, const int128::int128_t rhs, int128::int128_t& result) -> signed_overflow_status`
`1482`	`1485`	`{`
`@@ -1492,7 +1495,7 @@ inline auto signed_intrin_mul(const int128::int128_t lhs, const int128::int128_t`
`1492`	`1495`	`return signed_overflow_status::no_error;`
`1493`	`1496`	`}`
`1494`	`1497`
`1495`		`-#endif // BOOST_SAFE_NUMBERS_DETAIL_INT128_HAS_INT128`
	`1498`	`+#endif // BOOST_SAFE_NUMBERS_HAS_INT128_SIGNED_INTRIN_MUL`
`1496`	`1499`
`1497`	`1500`	`#elif defined(BOOST_SAFENUMBERS_HAS_WINDOWS_X64_INTRIN) \|\| defined(BOOST_SAFENUMBERS_HAS_WINDOWS_X86_INTRIN)`
`1498`	`1501`