# compute LLONG_MIN and LLONG_MAX if we don't know them.

if test -z "$have_llong_max"; then

	AC_MSG_CHECKING([for max value of long long])

	AC_RUN_IFELSE(

		[AC_LANG_SOURCE([[

#include <stdio.h>

/* Why is this so damn hard? */

#ifdef __GNUC__

# undef __GNUC__

#endif

#define __USE_ISOC99

#include <limits.h>

#define DATA "conftest.llminmax"

int main(void) {

	FILE *f;

	long long i, llmin, llmax = 0;

	if((f = fopen(DATA,"w")) == NULL)

		exit(1);

#if defined(LLONG_MIN) && defined(LLONG_MAX)

	fprintf(stderr, "Using system header for LLONG_MIN and LLONG_MAX\n");

	llmin = LLONG_MIN;

	llmax = LLONG_MAX;

#else

	fprintf(stderr, "Calculating  LLONG_MIN and LLONG_MAX\n");

	/* This will work on one's complement and two's complement */

	for (i = 1; i > llmax; i <<= 1, i++)

		llmax = i;

	llmin = llmax + 1LL;	/* wrap */

#endif

	/* Sanity check */

	if (llmin + 1 < llmin || llmin - 1 < llmin || llmax + 1 > llmax

	    || llmax - 1 > llmax) {

		fprintf(f, "unknown unknown\n");

		exit(2);

	}

	if (fprintf(f ,"%lld %lld", llmin, llmax) < 0)

		exit(3);

	exit(0);

}

		]])],

		[

			llong_min=`$AWK '{print $1}' conftest.llminmax`

			llong_max=`$AWK '{print $2}' conftest.llminmax`

			# snprintf on some Tru64s doesn't understand "%lld"

			case "$host" in

			alpha-dec-osf*)

				if test "x$ac_cv_sizeof_long_long_int" = "x8" &&

				  "x$llong_min" = "xld"; then

					llong_min="-9223372036854775808"

					llong_max="9223372036854775807"

				fi

				;;

			esac

			AC_MSG_RESULT($llong_max)

			AC_DEFINE_UNQUOTED(LLONG_MAX, [${llong_max}LL],

			    [max value of long long calculated by configure])

			AC_MSG_CHECKING([for min value of long long])

			AC_MSG_RESULT($llong_min)

			AC_DEFINE_UNQUOTED(LLONG_MIN, [${llong_min}LL],

			    [min value of long long calculated by configure])

		],

		[

			AC_MSG_RESULT(not found)

		],

		[

			AC_MSG_WARN([cross compiling: not checking])

		]

	)

fi