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#serial 4
# autoconf tests required for use of xstrtoumax.c
AC_DEFUN([jm_AC_PREREQ_XSTRTOUMAX],
[
AC_REQUIRE([jm_AC_TYPE_UINTMAX_T])
AC_REQUIRE([jm_AC_HEADER_INTTYPES_H])
AC_REQUIRE([jm_AC_TYPE_UNSIGNED_LONG_LONG])
AC_CHECK_DECLS([strtoul, strtoull])
AC_CHECK_HEADERS(limits.h 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], [#include <inttypes.h>
#ifdef strtoumax
inttypes_h_defines_strtoumax
#endif],
jm_cv_func_strtoumax_macro=yes,
jm_cv_func_strtoumax_macro=no))
if test "$jm_cv_func_strtoumax_macro" != yes; then
AC_REPLACE_FUNCS(strtoumax)
fi
dnl We don't need (and can't compile) the replacement strtoull
dnl unless the type `unsigned long long' exists.
dnl Also, only the replacement strtoumax invokes strtoull,
dnl so we need the replacement strtoull only if strtoumax does not exist.
case "$ac_cv_type_unsigned_long_long,$jm_cv_func_strtoumax_macro,$ac_cv_func_strtoumax" in
yes,no,no)
AC_REPLACE_FUNCS(strtoull strtol)
;;
esac
case "$jm_cv_func_strtoumax_macro,$ac_cv_func_strtoumax" in
no,no)
AC_REPLACE_FUNCS(strtoul strtol)
;;
esac
])
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