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Open Mash Cross Reference
mash/conf/configure.in.int64_t

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  1 dnl configure.in.int64_t --
  2 dnl
  3 dnl     autoconf rules for 64-bit integers
  4 dnl
  5 dnl Copyright (c) 2000-2002 The Regents of the University of California.
  6 dnl All rights reserved.
  7 dnl
  8 dnl Redistribution and use in source and binary forms, with or without
  9 dnl modification, are permitted provided that the following conditions are met:
 10 dnl
 11 dnl A. Redistributions of source code must retain the above copyright notice,
 12 dnl    this list of conditions and the following disclaimer.
 13 dnl B. Redistributions in binary form must reproduce the above copyright
 14 dnl    notice, this list of conditions and the following disclaimer in the
 15 dnl    documentation and/or other materials provided with the distribution.
 16 dnl C. Neither the names of the copyright holders nor the names of its
 17 dnl    contributors may be used to endorse or promote products derived from
 18 dnl    this software without specific prior written permission.
 19 dnl
 20 dnl THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS
 21 dnl IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 22 dnl THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 23 dnl PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE
 24 dnl LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 25 dnl CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 26 dnl SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 27 dnl INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 28 dnl CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 29 dnl ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 30 dnl POSSIBILITY OF SUCH DAMAGE.
 31 dnl
 32 dnl $Id: configure.in.int64_t,v 1.2 2002/02/03 03:02:48 lim Exp $
 33 
 34 dnl
 35 dnl start by looking for supporting functions
 36 dnl
 37 AC_CHECK_FUNCS(strtoq strtoll)
 38 
 39 dnl
 40 dnl int64_t seems to be what C 9x will have (in stdint.h),
 41 dnl but we're not there yet, so poke around for alternatives.
 42 dnl
 43 
 44 INT64_T_ALTERNATIVE=none
 45 HAVE_SUPPORTING_FUNC=false
 46 
 47 AC_CHECK_SIZEOF(long,0)
 48 if test $ac_cv_sizeof_long -ge 8
 49 then
 50         INT64_T_ALTERNATIVE=long
 51         AC_CHECK_FUNC(strtol)
 52 fi
 53 
 54 AC_CACHE_CHECK([for __int64_t],int64_t_HAVE___INT64_T,[
 55 AC_TRY_RUN([
 56 main() { __int64_t x; exit (sizeof(x) >= 8 ? 0 : 1); }
 57 ],
 58 int64_t_HAVE___INT64_T=yes,int64_t_HAVE___INT64_T=no,int64_t_HAVE___INT64_T=cross)])
 59 if test x"$int64_t_HAVE___INT64_T" = x"yes" -a "x$INT64_T_ALTERNATIVE" = xnone; then
 60         INT64_T_ALTERNATIVE=__int64_t
 61 fi
 62 
 63 AC_CACHE_CHECK([for long long],int64_t_HAVE_LONG_LONG,[
 64 AC_TRY_RUN([
 65 main() { long long x; exit (sizeof(x) >= 8 ? 0 : 1); }
 66 ],
 67 int64_t_HAVE_LONG_LONG=yes,int64_t_HAVE_LONG_LONG=no,int64_t_HAVE_LONG_LONG=cross)])
 68 if test x"$int64_t_HAVE_LONG_LONG" = x"yes" -a "x$INT64_T_ALTERNATIVE" = xnone; then
 69         INT64_T_ALTERNATIVE="long long"
 70 fi
 71 
 72 dnl
 73 dnl icky icky
 74 dnl
 75 dnl AC_CHECK_TYPE_UNQUOTED(TYPE, DEFAULT)
 76 AC_DEFUN(AC_CHECK_TYPE_UNQUOTED,
 77 [AC_REQUIRE([AC_HEADER_STDC])dnl
 78 AC_MSG_CHECKING(for $1)
 79 AC_CACHE_VAL(ac_cv_type_$1,
 80 [AC_EGREP_CPP(dnl
 81 changequote(<<,>>)dnl
 82 <<(^|[^a-zA-Z_0-9])$1[^a-zA-Z_0-9]>>dnl
 83 changequote([,]), [#include <sys/types.h>
 84 #if STDC_HEADERS
 85 #include <stdlib.h>
 86 #include <stddef.h>
 87 #endif], ac_cv_type_$1=yes, ac_cv_type_$1=no)])dnl
 88 AC_MSG_RESULT($ac_cv_type_$1)
 89 if test $ac_cv_type_$1 = no; then
 90   AC_DEFINE_UNQUOTED($1, $2)
 91 fi
 92 ])
 93 
 94 dnl
 95 dnl now set up int64_t
 96 dnl
 97 AC_CHECK_TYPE_UNQUOTED(int64_t,$INT64_T_ALTERNATIVE)
 98 
 99 dnl
100 dnl and broadcast our discovery
101 dnl
102 AC_MSG_CHECKING([which kind of 64-bit int to use])
103 if test $ac_cv_type_int64_t = yes -o "$INT64_T_ALTERNATIVE" != none
104 then
105         if test "$INT64_T_ALTERNATIVE" = long -o "$ac_cv_func_strtoq" = yes -o "$ac_cv_func_strtoll" = yes
106         then
107                 AC_DEFINE(HAVE_INT64)
108                 if test $ac_cv_type_int64_t = yes
109                 then
110                         AC_MSG_RESULT([int64_t])
111                 else
112                         AC_MSG_RESULT($INT64_T_ALTERNATIVE)
113                 fi
114         else
115                 AC_MSG_RESULT([missing strto 64-bit-type])
116         fi
117 else
118         AC_MSG_RESULT(none)
119 fi
120 
121 dnl
122 dnl see tclcl or ns's config.h for other STRTOI64 and STRTOI64_FMTSTR
123 dnl
124
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