autoconf cleanups.

[apps/madmutt.git] / m4 / size_max.m4

diff --git a/m4/size_max.m4 b/m4/size_max.m4
deleted file mode 100644 (file)
index 029e471..0000000
--- a/m4/size_max.m4
+++ /dev/null
@@ -1,60 +0,0 @@
-# size_max.m4 serial 4
-dnl Copyright (C) 2003, 2005-2006 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 Bruno Haible.
-
-AC_DEFUN([gl_SIZE_MAX],
-[
-  AC_CHECK_HEADERS(stdint.h)
-  dnl First test whether the system already has SIZE_MAX.
-  AC_MSG_CHECKING([for SIZE_MAX])
-  result=
-  AC_EGREP_CPP([Found it], [
-#include <limits.h>
-#if HAVE_STDINT_H
-#include <stdint.h>
-#endif
-#ifdef SIZE_MAX
-Found it
-#endif
-], result=yes)
-  if test -z "$result"; then
-    dnl Define it ourselves. Here we assume that the type 'size_t' is not wider
-    dnl than the type 'unsigned long'. Try hard to find a definition that can
-    dnl be used in a preprocessor #if, i.e. doesn't contain a cast.
-    _AC_COMPUTE_INT([sizeof (size_t) * CHAR_BIT - 1], size_t_bits_minus_1,
-      [#include <stddef.h>
-#include <limits.h>], size_t_bits_minus_1=)
-    _AC_COMPUTE_INT([sizeof (size_t) <= sizeof (unsigned int)], fits_in_uint,
-      [#include <stddef.h>], fits_in_uint=)
-    if test -n "$size_t_bits_minus_1" && test -n "$fits_in_uint"; then
-      if test $fits_in_uint = 1; then
-        dnl Even though SIZE_MAX fits in an unsigned int, it must be of type
-        dnl 'unsigned long' if the type 'size_t' is the same as 'unsigned long'.
-        AC_TRY_COMPILE([#include <stddef.h>
-          extern size_t foo;
-          extern unsigned long foo;
-          ], [], fits_in_uint=0)
-      fi
-      dnl We cannot use 'expr' to simplify this expression, because 'expr'
-      dnl works only with 'long' integers in the host environment, while we
-      dnl might be cross-compiling from a 32-bit platform to a 64-bit platform.
-      if test $fits_in_uint = 1; then
-        result="(((1U << $size_t_bits_minus_1) - 1) * 2 + 1)"
-      else
-        result="(((1UL << $size_t_bits_minus_1) - 1) * 2 + 1)"
-      fi
-    else
-      dnl Shouldn't happen, but who knows...
-      result='((size_t)~(size_t)0)'
-    fi
-  fi
-  AC_MSG_RESULT([$result])
-  if test "$result" != yes; then
-    AC_DEFINE_UNQUOTED([SIZE_MAX], [$result],
-      [Define as the maximum value of type 'size_t', if the system doesn't define it.])
-  fi
-])