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-rw-r--r--m4/size_max.m460
1 files changed, 0 insertions, 60 deletions
diff --git a/m4/size_max.m4 b/m4/size_max.m4
deleted file mode 100644
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--- 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
-])