diff options
| -rw-r--r-- | m4/uint32_t.m4 | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/m4/uint32_t.m4 b/m4/uint32_t.m4 new file mode 100644 index 000000000..b026ac7ae --- /dev/null +++ b/m4/uint32_t.m4 @@ -0,0 +1,60 @@ +# uint32_t.m4 serial 1 + +# Copyright (C) 2004 Free Software Foundation, Inc. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2, or (at your option) +# any later version. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software Foundation, +# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +# Written by Paul Eggert. + +AC_DEFUN([gl_AC_TYPE_UINT32_T], +[ + AC_CACHE_CHECK([for uint32_t], gl_cv_c_uint32_t, + [gl_cv_c_uint32_t=no + for ac_type in "uint32_t" "unsigned int" \ + "unsigned long int" "unsigned short int"; do + AC_COMPILE_IFELSE( + [AC_LANG_BOOL_COMPILE_TRY( + [AC_INCLUDES_DEFAULT], + [[(uint32_t) -1 == 4294967295U]])], + [gl_cv_c_uint32_t=$ac_type]) + test $gl_cv_c_uint32_t != no && break + done]) + case $gl_cv_c_uint32_t in + no|uint32_t) ;; + *) + AC_DEFINE_UNQUOTED(uint32_t, $gl_cv_c_uint32_t, + [Define to the type of a unsigned integer type of width exactly 32 bits + if such a type exists and the standard includes do not define it.]) + ;; + esac + + AC_CACHE_CHECK([for UINT32_MAX], gl_cv_c_uint32_max, + [AC_COMPILE_IFELSE( + [AC_LANG_BOOL_COMPILE_TRY( + [AC_INCLUDES_DEFAULT], + [[UINT32_MAX == 4294967295U]])], + [gl_cv_c_uint32_max=yes], + [gl_cv_c_uint32_max=no])]) + case $gl_cv_c_uint32_max,$gl_cv_c_uint32_t in + yes,*) ;; + *,no) ;; + *) + AC_DEFINE(UINT32_MAX, 4294967295U, + [Define to its maximum value if an unsigned integer type of width + exactly 32 bits exists and the standard includes do not define + UINT32_MAX.]) + ;; + esac +]) |