<linux/overflow.h>: Don't use __has_builtin().
GCC only added support for __has_builtin in GCC 10. However, all supported versions of GCC and clang include these builtins so just use them unconditionally. This fixes the build with GCC 9. Reviewed by: manu, hselasky, imp Differential Revision: https://reviews.freebsd.org/D31942
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@ -34,18 +34,9 @@
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#include <sys/stdint.h>
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#include <sys/types.h>
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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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#if __has_builtin(__builtin_add_overflow)
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#define check_add_overflow(a, b, c) \
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__builtin_add_overflow(a, b, c)
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#else
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#error "Compiler does not support __builtin_add_overflow"
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#endif
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#if __has_builtin(__builtin_mul_overflow)
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#define check_mul_overflow(a, b, c) \
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__builtin_mul_overflow(a, b, c)
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@ -58,8 +49,5 @@ array_size(size_t x, size_t y)
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retval = SIZE_MAX;
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return (retval);
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}
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#else
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#error "Compiler does not support __builtin_mul_overflow"
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#endif
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#endif /* __LINUX_OVERFLOW_H__ */
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