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#serial 1 -*- autoconf -*-
dnl FIXME
AC_DEFUN(jm_SYS_OFF_T_PRINTF_FORMAT,
[dnl
AC_REQUIRE([AC_TYPE_OFF_T])
AC_CHECK_HEADERS(string.h stdlinb.h)
AC_CACHE_CHECK([for printf format that works with type off_t],
jm_cv_sys_off_t_printf_format,
[
jm_cv_sys_off_t_printf_format=undef
for jm_fmt in '' L ll q; do
jm_OFF_T_FORMAT="$jm_fmt"
export jm_OFF_T_FORMAT
AC_TRY_RUN([
# include <sys/types.h>
# include <stdio.h>
# if HAVE_STDLIB_H
# include <stdlib.h>
# endif
# if HAVE_STRING_H
# include <string.h>
# endif
int
main()
{
static off_t x[] = {1, 255, 65535, 99999999};
char buf[50], fmt[50];
/* this should be one of these values: "", "L", "ll", "q" */
char *f = getenv ("jm_OFF_T_FORMAT");
sprintf (fmt, "%%%sd %%%sx %%%sx %%%sd", f, f, f, f);
sprintf (buf, fmt, x[0], x[1], x[2], x[3]);
exit (strcmp (buf, "1 ff ffff 99999999"));
}
], jm_cv_sys_off_t_printf_format=$jm_fmt; break
, dnl didn't work
dnl Cross compiling -- you lose. Specify it via the cache.
)
done
# Die if none of the above worked.
# FIXME: If this failure become a problem that we can't work around,
# an alternative would be to arrange not to build od.
if test "$jm_cv_sys_off_t_printf_format" = undef; then
AC_MSG_ERROR(dnl
[couldn't find a printf format that works with the type, off_t])
fi
])
AC_DEFINE_UNQUOTED(OFF_T_PRINTF_FORMAT_STRING,
"$jm_cv_sys_off_t_printf_format",
[printf format string for type off_t, without the `%'])
])
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