AC_DEFUN(jm_AC_PREREQ_XSTRTOUMAX,
[
AC_REQUIRE([jm_AC_HEADER_INTTYPES_H])
AC_REQUIRE([jm_AC_TYPE_UNSIGNED_LONG_LONG])
AC_CHECK_HEADERS(stdlib.h)
AC_CACHE_CHECK([whether <inttypes.h> defines strtoumax as a macro],
jm_cv_func_strtoumax_macro,
AC_EGREP_CPP([inttypes_h_defines_strtoumax], [ inttypes_h_defines_strtoumax
jm_cv_func_strtoumax_macro=yes,
jm_cv_func_strtoumax_macro=no))
if test "$jm_cv_func_strtoumax_macro" != yes; then
AC_REPLACE_FUNCS(strtoumax)
fi
case "$ac_cv_type_unsigned_long_long,$jm_cv_func_strtoumax_macro,$ac_cv_func_strtoumax" in
yes,no,no)
AC_REPLACE_FUNCS(strtoull)
;;
esac
])