--- /dev/null
+#serial 6
+
+dnl From Paul Eggert.
+
+AC_PREREQ(2.13)
+
+# Define HAVE_INTTYPES_H if <inttypes.h> exists,
+# doesn't clash with <sys/types.h>, and declares intmax_t and uintmax_t.
+
+AC_DEFUN([jm_AC_HEADER_INTTYPES_H],
+[
+ AC_CACHE_CHECK([for inttypes.h], jm_ac_cv_header_inttypes_h,
+ [AC_TRY_COMPILE(
+ [#include <sys/types.h>
+#include <inttypes.h>],
+ [intmax_t i = (intmax_t) -1; uintmax_t ui = (uintmax_t) -1;],
+ jm_ac_cv_header_inttypes_h=yes,
+ jm_ac_cv_header_inttypes_h=no)])
+ if test $jm_ac_cv_header_inttypes_h = yes; then
+ AC_DEFINE_UNQUOTED(HAVE_INTTYPES_H, 1,
+[Define if <inttypes.h> exists, doesn't clash with <sys/types.h>,
+ and declares intmax_t and uintmax_t.])
+ fi
+])
+
+# Define intmax_t to long or long long if <inttypes.h> doesn't define.
+
+AC_DEFUN([jm_AC_TYPE_INTMAX_T],
+[
+ AC_REQUIRE([jm_AC_HEADER_INTTYPES_H])
+ if test $jm_ac_cv_header_inttypes_h = no; then
+ AC_REQUIRE([jm_AC_TYPE_LONG_LONG])
+ test $ac_cv_type_long_long = yes \
+ && ac_type='long long' \
+ || ac_type='long'
+ AC_DEFINE_UNQUOTED(intmax_t, $ac_type,
+ [Define to long or long long if <inttypes.h> doesn't define.])
+ fi
+])
+
+# Define uintmax_t to unsigned long or unsigned long long
+# if <inttypes.h> doesn't define.
+
+AC_DEFUN([jm_AC_TYPE_UINTMAX_T],
+[
+ AC_REQUIRE([jm_AC_HEADER_INTTYPES_H])
+ if test $jm_ac_cv_header_inttypes_h = no; then
+ AC_REQUIRE([jm_AC_TYPE_UNSIGNED_LONG_LONG])
+ test $ac_cv_type_unsigned_long_long = yes \
+ && ac_type='unsigned long long' \
+ || ac_type='unsigned long'
+ AC_DEFINE_UNQUOTED(uintmax_t, $ac_type,
+[Define to unsigned long or unsigned long long
+ if <inttypes.h> doesn't define.])
+ fi
+])