* configure.in (LIMITS_INC_SRCDIR): New variable.
* configure.target (LIMITSH): New variable.
* porting.texi: Discuss numeric limits.
* config/cpu/generic/bits/limits.h: New file.
* config/cpu/i386/bits/limits.h: New file.
* include/Makefile.am: Install bits/limits.h.
* include/bits/c++config: Include bits/limits.h.
From-SVN: r44877
+2001-08-13 Mark Mitchell <mark@codesourcery.com>
+
+ * configure.in (LIMITS_INC_SRCDIR): New variable.
+ * configure.target (LIMITSH): New variable.
+ * porting.texi: Discuss numeric limits.
+ * config/cpu/generic/bits/limits.h: New file.
+ * config/cpu/i386/bits/limits.h: New file.
+ * include/Makefile.am: Install bits/limits.h.
+ * include/bits/c++config: Include bits/limits.h.
+
2001-08-13 H.J. Lu (hjl@gnu.org)
* testsuite/lib/libstdc++-v3-dg.exp (libstdc++-v3-copy-files):
LIBSUPCXX_INCLUDES = @LIBSUPCXX_INCLUDES@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
--- /dev/null
+// Copyright (C) 2001 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library 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 library 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 library; see the file COPYING. If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction. Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License. This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+#ifndef _GLIBCPP_CPU_LIMITS
+#define _GLIBCPP_CPU_LIMITS 1
+
+// Nothing is defined in the generic file. In that way, we fall back
+// on the defaults in std_limits.h.
+
+// If you need to override these defaults, you can either use a
+// CPU-specific version (in which case you must modify
+// configure.target) or you must add the overrides to your
+// os_defines.h. In general, if all systems for your CPU use the
+// same values, it is best to use a cpu-specific configuration file.
+
+#endif
--- /dev/null
+// Copyright (C) 2001 Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library. This library 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 library 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 library; see the file COPYING. If not, write to the Free
+// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
+// USA.
+
+// As a special exception, you may use this file as part of a free software
+// library without restriction. Specifically, if other files instantiate
+// templates or use macros or inline functions from this file, or you compile
+// this file and link it with other files to produce an executable, this
+// file does not by itself cause the resulting executable to be covered by
+// the GNU General Public License. This exception does not however
+// invalidate any other reasons why the executable file might be covered by
+// the GNU General Public License.
+
+#ifndef _GLIBCPP_CPU_LIMITS
+#define _GLIBCPP_CPU_LIMITS 1
+
+#define __glibcpp_long_double_bits 80
+
+#endif
# Propagate the target-specific source directories through the build chain.
OS_INC_SRCDIR=$os_include_dir/bits
ATOMICITY_INC_SRCDIR=$ATOMICITYH/bits
+LIMITS_INC_SRCDIR=$LIMITSH/bits
+
glibcpp_prefixdir=${prefix}
echo $ac_n "checking for interface version number""... $ac_c" 1>&6
-echo "configure:19241: checking for interface version number" >&5
+echo "configure:19243: checking for interface version number" >&5
libstdcxx_interface=$INTERFACE
echo "$ac_t""$libstdcxx_interface" 1>&6
# Process the option --with-gxx-include-dir=<path to include-files directory>
echo $ac_n "checking for --with-gxx-include-dir""... $ac_c" 1>&6
-echo "configure:19247: checking for --with-gxx-include-dir" >&5
+echo "configure:19249: checking for --with-gxx-include-dir" >&5
# Check whether --with-gxx-include-dir or --without-gxx-include-dir was given.
if test "${with_gxx_include_dir+set}" = set; then
withval="$with_gxx_include_dir"
# Process the option "--enable-version-specific-runtime-libs"
echo $ac_n "checking for --enable-version-specific-runtime-libs""... $ac_c" 1>&6
-echo "configure:19271: checking for --enable-version-specific-runtime-libs" >&5
+echo "configure:19273: checking for --enable-version-specific-runtime-libs" >&5
# Check whether --enable-version-specific-runtime-libs or --disable-version-specific-runtime-libs was given.
if test "${enable_version_specific_runtime_libs+set}" = set; then
enableval="$enable_version_specific_runtime_libs"
fi
echo $ac_n "checking for install location""... $ac_c" 1>&6
-echo "configure:19312: checking for install location" >&5
+echo "configure:19314: checking for install location" >&5
echo "$ac_t""$gxx_include_dir" 1>&6
s%@WERROR@%$WERROR%g
s%@OS_INC_SRCDIR@%$OS_INC_SRCDIR%g
s%@ATOMICITY_INC_SRCDIR@%$ATOMICITY_INC_SRCDIR%g
+s%@LIMITS_INC_SRCDIR@%$LIMITS_INC_SRCDIR%g
s%@GLIBCPP_IS_CROSS_COMPILING@%$GLIBCPP_IS_CROSS_COMPILING%g
s%@CANADIAN_TRUE@%$CANADIAN_TRUE%g
s%@CANADIAN_FALSE@%$CANADIAN_FALSE%g
# Propagate the target-specific source directories through the build chain.
OS_INC_SRCDIR=$os_include_dir/bits
ATOMICITY_INC_SRCDIR=$ATOMICITYH/bits
+LIMITS_INC_SRCDIR=$LIMITSH/bits
AC_SUBST(OS_INC_SRCDIR)
AC_SUBST(ATOMICITY_INC_SRCDIR)
+AC_SUBST(LIMITS_INC_SRCDIR)
# Set up cross-compile flags
AC_SUBST(GLIBCPP_IS_CROSS_COMPILING)
ATOMICITYH=$cpu_include_dir
;;
esac
+
+# Set LIMITSH to the directory where the configuration-dependent
+# limits.h can be found.
+# THIS TABLE IS SORTED. KEEP IT THAT WAY.
+
+case "${target}" in
+ i?86-*-*)
+ LIMITSH=config/cpu/i386
+ ;;
+ *)
+ LIMITSH=config/cpu/generic
+ ;;
+esac
## Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
## USA.
-## $Id: Makefile.am,v 1.3 2001/08/10 15:47:21 gdr Exp $
+## $Id: Makefile.am,v 1.4 2001/08/10 20:44:53 ljrittle Exp $
AUTOMAKE_OPTIONS = 1.3 gnits
MAINT_CHARSET = latin1
${target_srcdir}/ctype_inline.h \
${target_srcdir}/ctype_noninline.h \
${target_srcdir}/os_defines.h \
- ${glibcpp_srcdir}/@ATOMICITY_INC_SRCDIR@/atomicity.h
+ ${glibcpp_srcdir}/@ATOMICITY_INC_SRCDIR@/atomicity.h \
+ ${glibcpp_srcdir}/@LIMITS_INC_SRCDIR@/limits.h
thread_builddir = ./${target_alias}/bits
thread_headers = \
LIBSUPCXX_INCLUDES = @LIBSUPCXX_INCLUDES@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
target_srcdir = ${glibcpp_srcdir}/@OS_INC_SRCDIR@
target_builddir = ./${target_alias}/bits
-target_headers = ${target_srcdir}/ctype_base.h ${target_srcdir}/ctype_inline.h ${target_srcdir}/ctype_noninline.h ${target_srcdir}/os_defines.h ${glibcpp_srcdir}/@ATOMICITY_INC_SRCDIR@/atomicity.h
+target_headers = ${target_srcdir}/ctype_base.h ${target_srcdir}/ctype_inline.h ${target_srcdir}/ctype_noninline.h ${target_srcdir}/os_defines.h ${glibcpp_srcdir}/@ATOMICITY_INC_SRCDIR@/atomicity.h ${glibcpp_srcdir}/@LIMITS_INC_SRCDIR@/limits.h
thread_builddir = ./${target_alias}/bits
// Pick up any OS-specific definitions.
#include <bits/os_defines.h>
+// And any CPU-specific definitions.
+#include <bits/limits.h>
// The current version of the C++ library in compressed ISO date format.
#define __GLIBCPP__ 20010813
LIBSUPCXX_INCLUDES = @LIBSUPCXX_INCLUDES@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
LIBSUPCXX_INCLUDES = @LIBSUPCXX_INCLUDES@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
LIBSUPCXX_INCLUDES = @LIBSUPCXX_INCLUDES@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
LIBMATH_INCLUDES = @LIBMATH_INCLUDES@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
LIBSUPCXX_INCLUDES = @LIBSUPCXX_INCLUDES@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
* Operating system:: Configuring for your operating system.
* Character types:: Implementing character classification.
* Thread safety:: Implementing atomic operations.
+* Numeric limits:: Implementing numeric limits.
* Libtool:: Using libtool.
* GNU Free Documentation License:: How you can copy and share this manual.
@end menu
@}
@end example
+@c ---------------------------------------------------------------------
+@c Numeric limits
+@c ---------------------------------------------------------------------
+
+@node Numeric limits
+@chapter Numeric limits
+
+The C++ library requires information about the fundamental data types,
+such as the minimum and maximum representable values of each type.
+You can define each of these values individually, but it is usually
+easiest just to indicate how many bits are used in each of the data
+types and let the library do the rest. For information about the
+macros to define, see the top of @file{include/bits/std_limits.h}.
+
+If you need to define any macros, you can do so in
+@file{os_defines.h}. However, if all operating systems for your CPU
+are likely to use the same values, you can provide a CPU-specific file
+instead so that you do not have to provide the same definitions for
+each operating system. To take that approach, create a new file
+called @file{limits.h} in your CPU configuration directory (e.g.,
+@file{config/cpu/i386/bits}) and then modify @file{configure.target}
+so that @code{LIMITSH} is set to the CPU directory (e.g.,
+@file{config/cpu/i386}). Note that @code{LIMITSH} should not include
+the @samp{bits} part of the directory name.
+
@c ---------------------------------------------------------------------
@c Libtool
@c ---------------------------------------------------------------------
LIBMATHOBJS = @LIBMATHOBJS@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
LIBSUPCXX_INCLUDES = @LIBSUPCXX_INCLUDES@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
git://gcc.gnu.org / gcc.git / commitdiff