diff --git a/include/qemu/host-utils.h b/include/qemu/host-utils.h
index bc743f5e32..29f3a99878 100644
--- a/include/qemu/host-utils.h
+++ b/include/qemu/host-utils.h
@@ -376,12 +376,7 @@ static inline uint64_t uabs64(int64_t v)
  */
 static inline bool sadd32_overflow(int32_t x, int32_t y, int32_t *ret)
 {
-#if __has_builtin(__builtin_add_overflow) || __GNUC__ >= 5
     return __builtin_add_overflow(x, y, ret);
-#else
-    *ret = x + y;
-    return ((*ret ^ x) & ~(x ^ y)) < 0;
-#endif
 }
 
 /**
@@ -394,12 +389,7 @@ static inline bool sadd32_overflow(int32_t x, int32_t y, int32_t *ret)
  */
 static inline bool sadd64_overflow(int64_t x, int64_t y, int64_t *ret)
 {
-#if __has_builtin(__builtin_add_overflow) || __GNUC__ >= 5
     return __builtin_add_overflow(x, y, ret);
-#else
-    *ret = x + y;
-    return ((*ret ^ x) & ~(x ^ y)) < 0;
-#endif
 }
 
 /**
@@ -412,12 +402,7 @@ static inline bool sadd64_overflow(int64_t x, int64_t y, int64_t *ret)
  */
 static inline bool uadd32_overflow(uint32_t x, uint32_t y, uint32_t *ret)
 {
-#if __has_builtin(__builtin_add_overflow) || __GNUC__ >= 5
     return __builtin_add_overflow(x, y, ret);
-#else
-    *ret = x + y;
-    return *ret < x;
-#endif
 }
 
 /**
@@ -430,12 +415,7 @@ static inline bool uadd32_overflow(uint32_t x, uint32_t y, uint32_t *ret)
  */
 static inline bool uadd64_overflow(uint64_t x, uint64_t y, uint64_t *ret)
 {
-#if __has_builtin(__builtin_add_overflow) || __GNUC__ >= 5
     return __builtin_add_overflow(x, y, ret);
-#else
-    *ret = x + y;
-    return *ret < x;
-#endif
 }
 
 /**
@@ -449,12 +429,7 @@ static inline bool uadd64_overflow(uint64_t x, uint64_t y, uint64_t *ret)
  */
 static inline bool ssub32_overflow(int32_t x, int32_t y, int32_t *ret)
 {
-#if __has_builtin(__builtin_sub_overflow) || __GNUC__ >= 5
     return __builtin_sub_overflow(x, y, ret);
-#else
-    *ret = x - y;
-    return ((*ret ^ x) & (x ^ y)) < 0;
-#endif
 }
 
 /**
@@ -468,12 +443,7 @@ static inline bool ssub32_overflow(int32_t x, int32_t y, int32_t *ret)
  */
 static inline bool ssub64_overflow(int64_t x, int64_t y, int64_t *ret)
 {
-#if __has_builtin(__builtin_sub_overflow) || __GNUC__ >= 5
     return __builtin_sub_overflow(x, y, ret);
-#else
-    *ret = x - y;
-    return ((*ret ^ x) & (x ^ y)) < 0;
-#endif
 }
 
 /**
@@ -487,12 +457,7 @@ static inline bool ssub64_overflow(int64_t x, int64_t y, int64_t *ret)
  */
 static inline bool usub32_overflow(uint32_t x, uint32_t y, uint32_t *ret)
 {
-#if __has_builtin(__builtin_sub_overflow) || __GNUC__ >= 5
     return __builtin_sub_overflow(x, y, ret);
-#else
-    *ret = x - y;
-    return x < y;
-#endif
 }
 
 /**
@@ -506,12 +471,7 @@ static inline bool usub32_overflow(uint32_t x, uint32_t y, uint32_t *ret)
  */
 static inline bool usub64_overflow(uint64_t x, uint64_t y, uint64_t *ret)
 {
-#if __has_builtin(__builtin_sub_overflow) || __GNUC__ >= 5
     return __builtin_sub_overflow(x, y, ret);
-#else
-    *ret = x - y;
-    return x < y;
-#endif
 }
 
 /**
@@ -524,13 +484,7 @@ static inline bool usub64_overflow(uint64_t x, uint64_t y, uint64_t *ret)
  */
 static inline bool smul32_overflow(int32_t x, int32_t y, int32_t *ret)
 {
-#if __has_builtin(__builtin_mul_overflow) || __GNUC__ >= 5
     return __builtin_mul_overflow(x, y, ret);
-#else
-    int64_t z = (int64_t)x * y;
-    *ret = z;
-    return *ret != z;
-#endif
 }
 
 /**
@@ -543,14 +497,7 @@ static inline bool smul32_overflow(int32_t x, int32_t y, int32_t *ret)
  */
 static inline bool smul64_overflow(int64_t x, int64_t y, int64_t *ret)
 {
-#if __has_builtin(__builtin_mul_overflow) || __GNUC__ >= 5
     return __builtin_mul_overflow(x, y, ret);
-#else
-    uint64_t hi, lo;
-    muls64(&lo, &hi, x, y);
-    *ret = lo;
-    return hi != ((int64_t)lo >> 63);
-#endif
 }
 
 /**
@@ -563,13 +510,7 @@ static inline bool smul64_overflow(int64_t x, int64_t y, int64_t *ret)
  */
 static inline bool umul32_overflow(uint32_t x, uint32_t y, uint32_t *ret)
 {
-#if __has_builtin(__builtin_mul_overflow) || __GNUC__ >= 5
     return __builtin_mul_overflow(x, y, ret);
-#else
-    uint64_t z = (uint64_t)x * y;
-    *ret = z;
-    return z > UINT32_MAX;
-#endif
 }
 
 /**
@@ -582,13 +523,7 @@ static inline bool umul32_overflow(uint32_t x, uint32_t y, uint32_t *ret)
  */
 static inline bool umul64_overflow(uint64_t x, uint64_t y, uint64_t *ret)
 {
-#if __has_builtin(__builtin_mul_overflow) || __GNUC__ >= 5
     return __builtin_mul_overflow(x, y, ret);
-#else
-    uint64_t hi;
-    mulu64(ret, &hi, x, y);
-    return hi != 0;
-#endif
 }
 
 /*