__builtin_mul_overflow_p  258 maint/gnulib/lib/intprops.h # define _GL_HAS_BUILTIN_OVERFLOW_P __has_builtin (__builtin_mul_overflow_p)
__builtin_mul_overflow_p  273 maint/gnulib/lib/intprops.h    __builtin_mul_overflow_p (a, b, (__typeof__ ((a) * (b))) 0)
__builtin_mul_overflow_p   50 maint/gnulib/lib/xalloc-oversized.h    __builtin_mul_overflow_p (n, s, (ptrdiff_t) 1)