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tools/missing-macros/src/m4/uintmax_t.m4

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+# uintmax_t.m4 serial 12
+dnl Copyright (C) 1997-2004, 2007-2010 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl From Paul Eggert.
+
+AC_PREREQ([2.13])
+
+# Define uintmax_t to 'unsigned long' or 'unsigned long long'
+# if it is not already defined in <stdint.h> or <inttypes.h>.
+
+AC_DEFUN([gl_AC_TYPE_UINTMAX_T],
+[
+  AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])
+  AC_REQUIRE([gl_AC_HEADER_STDINT_H])
+  if test $gl_cv_header_inttypes_h = no && test $gl_cv_header_stdint_h = no; then
+    AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT])
+    test $ac_cv_type_unsigned_long_long_int = yes \
+      && ac_type='unsigned long long' \
+      || ac_type='unsigned long'
+    AC_DEFINE_UNQUOTED([uintmax_t], [$ac_type],
+      [Define to unsigned long or unsigned long long
+       if <stdint.h> and <inttypes.h> don't define.])
+  else
+    AC_DEFINE([HAVE_UINTMAX_T], [1],
+      [Define if you have the 'uintmax_t' type in <stdint.h> or <inttypes.h>.])
+  fi
+])