libdecnumber/configure.ac

   1 # configure.ac for libdecnumber                 -*- Autoconf -*-
   2 # Process this file with autoconf to generate a configuration script.
   3
   4 # Copyright 2005, 2006, 2009 Free Software Foundation, Inc.
   5
   6 # This file is part of GCC.
   7
   8 # GCC is free software; you can redistribute it and/or modify it under
   9 # the terms of the GNU General Public License as published by the Free
  10 # Software Foundation; either version 3, or (at your option) any
  11 # later #version.
  12
  13 # GCC is distributed in the hope that it will be useful, but WITHOUT
  14 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15 # or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  16 # License #for more details.
  17
  18 # You should have received a copy of the GNU General Public License
  19 # along with GCC; see the file COPYING3.  If not see
  20 # <http://www.gnu.org/licenses/>.
  21
  22 AC_PREREQ(2.64)
  23 AC_INIT(libdecnumber, [ ], gcc-bugs@gcc.gnu.org, libdecnumber)
  24 AC_CONFIG_SRCDIR(decNumber.h)
  25 AC_CONFIG_MACRO_DIR(../config)
  26
  27 # Checks for programs.
  28 AC_PROG_MAKE_SET
  29 AC_PROG_CC
  30 AC_PROG_RANLIB
  31
  32 MISSING=`cd $ac_aux_dir && ${PWDCMD-pwd}`/missing
  33 AC_CHECK_PROGS([ACLOCAL], [aclocal], [$MISSING aclocal])
  34 AC_CHECK_PROGS([AUTOCONF], [autoconf], [$MISSING autoconf])
  35 AC_CHECK_PROGS([AUTOHEADER], [autoheader], [$MISSING autoheader])
  36
  37 # Figure out what compiler warnings we can enable.
  38 # See config/warnings.m4 for details.
  39
  40 ACX_PROG_CC_WARNING_OPTS([-W -Wall -Wwrite-strings -Wstrict-prototypes \
  41                           -Wmissing-prototypes -Wold-style-definition \
  42                           -Wmissing-format-attribute -Wcast-qual])
  43 ACX_PROG_CC_WARNING_ALMOST_PEDANTIC([-Wno-long-long])
  44
  45 # Only enable with --enable-werror-always until existing warnings are
  46 # corrected.
  47 ACX_PROG_CC_WARNINGS_ARE_ERRORS([manual])
  48
  49 # Checks for header files.
  50 AC_CHECK_HEADERS(ctype.h stddef.h string.h stdio.h)
  51 GCC_HEADER_STDINT(gstdint.h)
  52
  53 # Checks for typedefs, structures, and compiler characteristics.
  54 AC_C_CONST
  55 AC_TYPE_OFF_T
  56 AC_CHECK_SIZEOF(int)
  57 AC_CHECK_SIZEOF(long)
  58
  59 # Checks for library functions.
  60 AC_HEADER_STDC
  61
  62 AC_ARG_ENABLE(maintainer-mode,
  63 [  --enable-maintainer-mode enable rules only needed by maintainers],,
  64 enable_maintainer_mode=no)
  65
  66 if test "x$enable_maintainer_mode" = xno; then
  67   MAINT='#'
  68 else
  69   MAINT=
  70 fi
  71 AC_SUBST(MAINT)
  72
  73 AC_CANONICAL_TARGET
  74
  75 # Default decimal format
  76 # If you change the defaults here, be sure to change them in the GCC directory also
  77 AC_MSG_CHECKING([for decimal floating point])
  78 AC_ARG_ENABLE(decimal-float,
  79 [  --enable-decimal-float={no,yes,bid,dpd}
  80                         enable decimal float extension to C.  Selecting 'bid'
  81                         or 'dpd' choses which decimal floating point format
  82                         to use],
  83 [
  84   case $enable_decimal_float in
  85     yes | no | bid | dpd) ;;
  86     *) AC_MSG_ERROR(['$enable_decimal_float' is an invalid value for --enable-decimal-float.
  87 Valid choices are 'yes', 'bid', 'dpd', and 'no'.]) ;;
  88   esac
  89 ],
  90 [
  91   case $target in
  92     powerpc*-*-linux* | i?86*-*-linux* | x86_64*-*-linux*)
  93       enable_decimal_float=yes
  94       ;;
  95     *)
  96       enable_decimal_float=no
  97       ;;
  98   esac
  99 ])
 100
 101 # x86's use BID format instead of DPD
 102 # In theory --enable-decimal-float=no should not compile anything
 103 # For the sake of simplicity, just use the default format in this directory
 104 if test x$enable_decimal_float = xyes -o x$enable_decimal_float = xno; then
 105   case $target in
 106     i?86*-*-linux* | x86_64*-*-linux*)
 107       enable_decimal_float=bid
 108       ;;
 109     *)
 110       enable_decimal_float=dpd
 111       ;;
 112   esac
 113 fi
 114
 115 # If BID is being used, additional objects should be linked in.
 116 if test x$enable_decimal_float = xbid; then
 117   ADDITIONAL_OBJS="$ADDITIONAL_OBJS \$(bid_OBJS)"
 118 else
 119   ADDITIONAL_OBJS=
 120 fi
 121
 122 AC_MSG_RESULT($enable_decimal_float)
 123 AC_SUBST(enable_decimal_float)
 124 AC_SUBST(ADDITIONAL_OBJS)
 125
 126 AC_C_BIGENDIAN
 127
 128 # Output.
 129
 130 AC_CONFIG_HEADERS(config.h:config.in, [echo timestamp > stamp-h1])
 131 AC_CONFIG_FILES(Makefile)
 132 AC_OUTPUT