(jm_AC_HEADER_INTTYPES_H): Remove; now done by autoconf.

(jm_AC_TYPE_INTMAX_T, jm_AC_TYPE_UINTMAX_T): Replace with
Use AC_CHECK_TYPE instead of merely looking for the header.

m4/inttypes.m4

@@ -2,40 +2,19 @@
 
 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
-])
+AC_PREREQ(2.52)
 
 # 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
+  AC_REQUIRE([jm_AC_TYPE_LONG_LONG])
+  AC_CHECK_TYPE(intmax_t, ,
+    [test $ac_cv_type_long_long = yes \
+       && ac_type='long long' \
+       || ac_type='long'
+     AC_DEFINE_UNQUOTED(intmax_t, $ac_type,
+       [Define to widest signed type if <inttypes.h> doesn't define.])])
 ])
 
 # Define uintmax_t to unsigned long or unsigned long long
@@ -43,14 +22,11 @@ AC_DEFUN([jm_AC_TYPE_INTMAX_T],
 
 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
+  AC_REQUIRE([jm_AC_TYPE_UNSIGNED_LONG_LONG])
+  AC_CHECK_TYPE(uintmax_t, ,
+    [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 widest unsigned type if <inttypes.h> doesn't define.])])
 ])