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# ====================================================================
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#
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# compat.cdl
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#
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# Maths library compatibility related configuration data
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#
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# ====================================================================
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## ####ECOSGPLCOPYRIGHTBEGIN####
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## -------------------------------------------
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## This file is part of eCos, the Embedded Configurable Operating System.
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## Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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##
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## eCos is free software; you can redistribute it and/or modify it under
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## the terms of the GNU General Public License as published by the Free
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## Software Foundation; either version 2 or (at your option) any later
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## version.
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##
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## eCos is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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## for more details.
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##
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## You should have received a copy of the GNU General Public License
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## along with eCos; if not, write to the Free Software Foundation, Inc.,
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## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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##
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## As a special exception, if other files instantiate templates or use
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## macros or inline functions from this file, or you compile this file
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## and link it with other works to produce a work based on this file,
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## this file does not by itself cause the resulting work to be covered by
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## the GNU General Public License. However the source code for this file
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## must still be made available in accordance with section (3) of the GNU
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## General Public License v2.
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##
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## This exception does not invalidate any other reasons why a work based
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## on this file might be covered by the GNU General Public License.
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## -------------------------------------------
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## ####ECOSGPLCOPYRIGHTEND####
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# ====================================================================
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######DESCRIPTIONBEGIN####
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#
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# Author(s): jskov
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# Original data: jlarmour
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# Contributors:
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# Date: 1999-07-07
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#
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#####DESCRIPTIONEND####
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#
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# ====================================================================
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cdl_interface CYGINT_LIBM_COMPAT {
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requires 1 == CYGINT_LIBM_COMPAT
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}
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cdl_option CYGSEM_LIBM_COMPAT_IEEE_ONLY {
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display "IEEE-only"
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default_value 0
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implements CYGINT_LIBM_COMPAT
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description "
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The math library can be hard-coded to only
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behave in one compatibility mode - IEEE. This
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cannot be changed at run-time. IEEE mode is the
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most minimal of the compatibility modes, and so
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this will best help code size and speed, as well
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as omitting the code for other compatibility
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modes. If not defined, the math library can be
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set at run-time to any of the supported
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compatibility modes."
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}
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cdl_component CYGNUM_LIBM_COMPATIBILITY {
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display "Default mode"
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flavor booldata
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requires CYGPKG_LIBC
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implements CYGINT_LIBM_COMPAT
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legal_values { "POSIX" "IEEE" "XOPEN" "SVID" }
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default_value { "POSIX" }
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define CYGPKG_LIBM_COMPATIBILITY_DEFAULT
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description "
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If you want to have support for more than one
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compatibility mode settable at run-time, rather
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than hard-coded IEEE mode, this component lets
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you choose which mode should be the default."
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cdl_option CYGNUM_LIBM_COMPAT_DEFAULT {
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display "Numeric representation"
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flavor data
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calculated { \
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CYGNUM_LIBM_COMPATIBILITY == "POSIX" ? "CYGNUM_LIBM_COMPAT_POSIX" :\
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CYGNUM_LIBM_COMPATIBILITY == "IEEE" ? "CYGNUM_LIBM_COMPAT_IEEE" :\
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CYGNUM_LIBM_COMPATIBILITY == "XOPEN" ? "CYGNUM_LIBM_COMPAT_XOPEN" :\
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CYGNUM_LIBM_COMPATIBILITY == "SVID" ? "CYGNUM_LIBM_COMPAT_SVID" :\
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"" \
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}
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description "
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This option automatically defines the default compatibility
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mode for numeric representation in terms of the values used
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to set that mode at run-time."
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}
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}
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cdl_option CYGFUN_LIBM_SVID3_scalb {
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display "SVID3-style scalb()"
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default_value 1
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description "
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SVID3 defined the scalb() function as double
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scalb(double, double) rather than double
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scalb(double, int) which is used by IBM, DEC, and
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probably others. Enabling this option chooses
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the (double, double) version. Note there is a
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function double scalbn(double, int) which is
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unaffected by this choice."
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}
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cdl_option CYGSYM_LIBM_NO_XOPEN_SVID_NAMESPACE_POLLUTION {
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display "Reduce namespace pollution"
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default_value 0
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description "
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If you do not want to use either the X/Open or
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SVID3 compatibility modes, you may want to define
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this option to reduce the chance of namespace
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pollution. This is particularly likely to occur
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here as these standards define symbols with
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names that often appear in applications, such as
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exception, DOMAIN, OVERFLOW, etc. If your
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application also used these names, it may cause
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problems."
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}
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cdl_option CYGSEM_LIBM_USE_STDERR {
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display "Output to stderr for math errors"
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requires !CYGSEM_LIBM_COMPAT_IEEE_ONLY
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requires CYGPKG_LIBC_STDIO
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default_value 0
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description "
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The SVID3 standard says that error
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messages should be output on the stderr console
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output stream. This option allows this ability
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to be explicitly controlled. However, this still
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only has an effect in SVID3 compatibility mode."
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}
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