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Diffstat (limited to 'config/size_max.m4')
-rw-r--r-- | config/size_max.m4 | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/config/size_max.m4 b/config/size_max.m4 deleted file mode 100644 index 5762fc3..0000000 --- a/config/size_max.m4 +++ /dev/null @@ -1,61 +0,0 @@ -# size_max.m4 serial 2 -dnl Copyright (C) 2003 Free Software Foundation, Inc. -dnl This file is free software, distributed under the terms of the GNU -dnl General Public License. As a special exception to the GNU General -dnl Public License, this file may be distributed as part of a program -dnl that contains a configuration script generated by Autoconf, under -dnl the same distribution terms as the rest of that program. - -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 "$result"; then - dnl Define it ourselves. Here we assume that the type 'size_t' is not wider - dnl than the type 'unsigned long'. - dnl The _AC_COMPUTE_INT macro works up to LONG_MAX, since it uses 'expr', - dnl which is guaranteed to work from LONG_MIN to LONG_MAX. - _AC_COMPUTE_INT([~(size_t)0 / 10], res_hi, - [#include <stddef.h>], result=?) - _AC_COMPUTE_INT([~(size_t)0 % 10], res_lo, - [#include <stddef.h>], result=?) - _AC_COMPUTE_INT([sizeof (size_t) <= sizeof (unsigned int)], fits_in_uint, - [#include <stddef.h>], result=?) - if test "$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 - if test -z "$result"; then - if test "$fits_in_uint" = 1; then - result="$res_hi$res_lo"U - else - result="$res_hi$res_lo"UL - fi - else - dnl Shouldn't happen, but who knows... - result='~(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 -]) |