Paul Eggert wrote: > > dnl The _AC_COMPUTE_INT macro works up to LONG_MAX, since it uses > > 'expr', dnl which is guaranteed to work from LONG_MIN to LONG_MAX. > > ... > > _AC_COMPUTE_INT([~(size_t)0 / 10], res_hi, > > [#include <stddef.h>], result=?) > > _AC_COMPUTE_INT([~(size_t)0 % 10], res_lo, > > [#include <stddef.h>], result=?) > > Ouch. This is a hassle. Perhaps Autoconf should be fixed so that > _AC_COMPUTE_INT can handle values outside the range > LONG_MIN..LONG_MAX? That would be better than having to do this sort > of thing by hand all the time. (This wouldn't fix the immediate > problem of course; I'm thinking more long-term.) 'expr' is certainly the easiest auxiliary program that can be used to compute "2*x" and "(x+y)/2" for some integers x and y, but it's not the only one. You could also use 'sed' for this purpose. The only problem with 'sed' in this place is aesthetics: a 'sed' program for "y = x+1" is ca. 18 lines of code in 'sed', so I guess for "z = x+y" you'll need 50 or 100 sed statements. Bruno