93f6e21759
* lib/Makefile.am, lib/alloca.c, lib/alloca.in.h, lib/argp-ba.c, lib/argp-eexst.c, lib/argp-fmtstream.c, lib/argp-fmtstream.h, lib/argp-fs-xinl.c, lib/argp-help.c, lib/argp-namefrob.h, lib/argp-parse.c, lib/argp-pin.c, lib/argp-pv.c, lib/argp-pvh.c, lib/argp-xinl.c, lib/argp.h, lib/asnprintf.c, lib/basename-lgpl.c, lib/dirname-lgpl.c, lib/dirname.h, lib/dosname.h, lib/errno.in.h, lib/float+.h, lib/float.c, lib/float.in.h, lib/getopt.c, lib/getopt.in.h, lib/getopt1.c, lib/getopt_int.h, lib/gettext.h, lib/intprops.h, lib/itold.c, lib/malloc.c, lib/memchr.c, lib/memchr.valgrind, lib/mempcpy.c, lib/printf-args.c, lib/printf-args.h, lib/printf-parse.c, lib/printf-parse.h, lib/rawmemchr.c, lib/rawmemchr.valgrind, lib/size_max.h, lib/sleep.c, lib/stdalign.in.h, lib/stdbool.in.h, lib/stddef.in.h, lib/stdint.in.h, lib/stdio.in.h, lib/stdlib.in.h, lib/strcasecmp.c, lib/strchrnul.c, lib/strchrnul.valgrind, lib/strerror-override.c, lib/strerror-override.h, lib/strerror.c, lib/string.in.h, lib/strings.in.h, lib/stripslash.c, lib/strncasecmp.c, lib/strndup.c, lib/strnlen.c, lib/sys_types.in.h, lib/sysexits.in.h, lib/unistd.in.h, lib/vasnprintf.c, lib/vasnprintf.h, lib/verify.h, lib/vsnprintf.c, lib/wchar.in.h, lib/xsize.h, m4/00gnulib.m4, m4/alloca.m4, m4/argp.m4, m4/dirname.m4, m4/double-slash-root.m4, m4/errno_h.m4, m4/exponentd.m4, m4/extensions.m4, m4/float_h.m4, m4/getopt.m4, m4/gnulib-cache.m4, m4/gnulib-common.m4, m4/gnulib-comp.m4, m4/gnulib-tool.m4, m4/include_next.m4, m4/intmax_t.m4, m4/inttypes_h.m4, m4/longlong.m4, m4/malloc.m4, m4/math_h.m4, m4/memchr.m4, m4/mempcpy.m4, m4/mmap-anon.m4, m4/multiarch.m4, m4/nocrash.m4, m4/off_t.m4, m4/printf.m4, m4/rawmemchr.m4, m4/size_max.m4, m4/sleep.m4, m4/ssize_t.m4, m4/stdalign.m4, m4/stdbool.m4, m4/stddef_h.m4, m4/stdint.m4, m4/stdint_h.m4, m4/stdio_h.m4, m4/stdlib_h.m4, m4/strcase.m4, m4/strchrnul.m4, m4/strerror.m4, m4/string_h.m4, m4/strings_h.m4, m4/strndup.m4, m4/strnlen.m4, m4/sys_socket_h.m4, m4/sys_types_h.m4, m4/sysexits.m4, m4/unistd_h.m4, m4/vasnprintf.m4, m4/vsnprintf.m4, m4/warn-on-use.m4, m4/wchar_h.m4, m4/wchar_t.m4, m4/wint_t.m4, m4/xsize.m4, tools/snippet/_Noreturn.h, tools/snippet/arg-nonnull.h, tools/snippet/c++defs.h, tools/snippet/warn-on-use.h: New files from gnulib 1af55d85d9762a679b4302d5995f05ccd883e956. * configure.ac, Makefile.am: Adjust to compile gnulib. * src/bin/Makefile.am: Adjust to use gnulib. * README: Mention lib/.
79 lines
3 KiB
Text
79 lines
3 KiB
Text
# size_max.m4 serial 10
|
|
dnl Copyright (C) 2003, 2005-2006, 2008-2012 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_CACHE_CHECK([for SIZE_MAX], [gl_cv_size_max], [
|
|
gl_cv_size_max=
|
|
AC_EGREP_CPP([Found it], [
|
|
#include <limits.h>
|
|
#if HAVE_STDINT_H
|
|
#include <stdint.h>
|
|
#endif
|
|
#ifdef SIZE_MAX
|
|
Found it
|
|
#endif
|
|
], [gl_cv_size_max=yes])
|
|
if test -z "$gl_cv_size_max"; then
|
|
dnl Define it ourselves. Here we assume that the type 'size_t' is not wider
|
|
dnl than the type 'unsigned long'. Try hard to find a definition that can
|
|
dnl be used in a preprocessor #if, i.e. doesn't contain a cast.
|
|
AC_COMPUTE_INT([size_t_bits_minus_1], [sizeof (size_t) * CHAR_BIT - 1],
|
|
[#include <stddef.h>
|
|
#include <limits.h>], [size_t_bits_minus_1=])
|
|
AC_COMPUTE_INT([fits_in_uint], [sizeof (size_t) <= sizeof (unsigned int)],
|
|
[#include <stddef.h>], [fits_in_uint=])
|
|
if test -n "$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_COMPILE_IFELSE(
|
|
[AC_LANG_PROGRAM(
|
|
[[#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
|
|
gl_cv_size_max="(((1U << $size_t_bits_minus_1) - 1) * 2 + 1)"
|
|
else
|
|
gl_cv_size_max="(((1UL << $size_t_bits_minus_1) - 1) * 2 + 1)"
|
|
fi
|
|
else
|
|
dnl Shouldn't happen, but who knows...
|
|
gl_cv_size_max='((size_t)~(size_t)0)'
|
|
fi
|
|
fi
|
|
])
|
|
if test "$gl_cv_size_max" != yes; then
|
|
AC_DEFINE_UNQUOTED([SIZE_MAX], [$gl_cv_size_max],
|
|
[Define as the maximum value of type 'size_t', if the system doesn't define it.])
|
|
fi
|
|
dnl Don't redefine SIZE_MAX in config.h if config.h is re-included after
|
|
dnl <stdint.h>. Remember that the #undef in AH_VERBATIM gets replaced with
|
|
dnl #define by AC_DEFINE_UNQUOTED.
|
|
AH_VERBATIM([SIZE_MAX],
|
|
[/* Define as the maximum value of type 'size_t', if the system doesn't define
|
|
it. */
|
|
#ifndef SIZE_MAX
|
|
# undef SIZE_MAX
|
|
#endif])
|
|
])
|
|
|
|
dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
|
|
dnl Remove this when we can assume autoconf >= 2.61.
|
|
m4_ifdef([AC_COMPUTE_INT], [], [
|
|
AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
|
|
])
|