From 9f3c078ea9fa32e0e1819225c89a1c97b89d5b5f Mon Sep 17 00:00:00 2001
From: Mark Mitchell <mark@codesourcery.com>
Date: Mon, 13 Aug 2001 22:26:11 +0000
Subject: [PATCH] configure.in (LIMITS_INC_SRCDIR): New variable.
* 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
---
libstdc++-v3/ChangeLog | 10 +++++
libstdc++-v3/Makefile.in | 1 +
libstdc++-v3/config/cpu/generic/bits/limits.h | 40 +++++++++++++++++++
libstdc++-v3/config/cpu/i386/bits/limits.h | 33 +++++++++++++++
libstdc++-v3/configure | 11 +++--
libstdc++-v3/configure.in | 2 +
libstdc++-v3/configure.target | 13 ++++++
libstdc++-v3/include/Makefile.am | 5 ++-
libstdc++-v3/include/Makefile.in | 3 +-
libstdc++-v3/include/bits/c++config | 2 +
libstdc++-v3/intl/Makefile.in | 1 +
libstdc++-v3/libio/Makefile.in | 1 +
libstdc++-v3/libmath/Makefile.in | 1 +
libstdc++-v3/libsupc++/Makefile.in | 1 +
libstdc++-v3/po/Makefile.in | 1 +
libstdc++-v3/porting.texi | 26 ++++++++++++
libstdc++-v3/src/Makefile.in | 1 +
libstdc++-v3/testsuite/Makefile.in | 1 +
18 files changed, 146 insertions(+), 7 deletions(-)
create mode 100644 libstdc++-v3/config/cpu/generic/bits/limits.h
create mode 100644 libstdc++-v3/config/cpu/i386/bits/limits.h
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 437ecf686f2d..e6b532cbe756 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,13 @@
+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):
diff --git a/libstdc++-v3/Makefile.in b/libstdc++-v3/Makefile.in
index 152173de00f6..4525bd43d71a 100644
--- a/libstdc++-v3/Makefile.in
+++ b/libstdc++-v3/Makefile.in
@@ -105,6 +105,7 @@ LIBMATH_INCLUDES = @LIBMATH_INCLUDES@
LIBSUPCXX_INCLUDES = @LIBSUPCXX_INCLUDES@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
diff --git a/libstdc++-v3/config/cpu/generic/bits/limits.h b/libstdc++-v3/config/cpu/generic/bits/limits.h
new file mode 100644
index 000000000000..8fa5a82145f6
--- /dev/null
+++ b/libstdc++-v3/config/cpu/generic/bits/limits.h
@@ -0,0 +1,40 @@
+// 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
diff --git a/libstdc++-v3/config/cpu/i386/bits/limits.h b/libstdc++-v3/config/cpu/i386/bits/limits.h
new file mode 100644
index 000000000000..be304e2d8055
--- /dev/null
+++ b/libstdc++-v3/config/cpu/i386/bits/limits.h
@@ -0,0 +1,33 @@
+// 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
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 0d5aa0632675..d3196168b1b5 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -19156,6 +19156,8 @@ fi
# 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=$LIMITSH/bits
+
@@ -19237,13 +19239,13 @@ glibcpp_toolexeclibdir=no
glibcpp_prefixdir=${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="$with_gxx_include_dir"
@@ -19267,7 +19269,7 @@ echo "$ac_t""$gxx_include_dir" 1>&6
# 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="$enable_version_specific_runtime_libs"
@@ -19308,7 +19310,7 @@ if test x"$glibcpp_toolexecdir" = x"no"; then
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""$gxx_include_dir" 1>&6
@@ -19603,6 +19605,7 @@ s%@USE_COMPLEX_LONG_DOUBLE@%$USE_COMPLEX_LONG_DOUBLE%g
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@%$CANADIAN_FALSE%g
diff --git a/libstdc++-v3/configure.in b/libstdc++-v3/configure.in
index 8a2b5364d1fd..99d013ab8a26 100644
--- a/libstdc++-v3/configure.in
+++ b/libstdc++-v3/configure.in
@@ -204,8 +204,10 @@ fi
# Propagate the target-specific source directories through the build chain.
OS_INC_SRCDIR=$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)
diff --git a/libstdc++-v3/configure.target b/libstdc++-v3/configure.target
index 5e619d039f5d..4cacb4f26d1d 100644
--- a/libstdc++-v3/configure.target
+++ b/libstdc++-v3/configure.target
@@ -122,3 +122,16 @@ case "${target}" in
ATOMICITYH=$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
diff --git a/libstdc++-v3/include/Makefile.am b/libstdc++-v3/include/Makefile.am
index f5ceb08190e6..baf3b0a61c3b 100644
--- a/libstdc++-v3/include/Makefile.am
+++ b/libstdc++-v3/include/Makefile.am
@@ -21,7 +21,7 @@
## 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
@@ -285,7 +285,8 @@ target_headers = \
${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 = \
diff --git a/libstdc++-v3/include/Makefile.in b/libstdc++-v3/include/Makefile.in
index b010d072199e..3a374cf5fa47 100644
--- a/libstdc++-v3/include/Makefile.in
+++ b/libstdc++-v3/include/Makefile.in
@@ -104,6 +104,7 @@ LIBMATH_INCLUDES = @LIBMATH_INCLUDES@
LIBSUPCXX_INCLUDES = @LIBSUPCXX_INCLUDES@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
@@ -180,7 +181,7 @@ std_headers = ${std_srcdir}/algorithm ${std_srcdir}/bitset ${std_srcdir}/com
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
diff --git a/libstdc++-v3/include/bits/c++config b/libstdc++-v3/include/bits/c++config
index 3fa61fe66377..42ce59705aad 100644
--- a/libstdc++-v3/include/bits/c++config
+++ b/libstdc++-v3/include/bits/c++config
@@ -32,6 +32,8 @@
// 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
diff --git a/libstdc++-v3/intl/Makefile.in b/libstdc++-v3/intl/Makefile.in
index fcdf38b72bfb..1724a3d033a4 100644
--- a/libstdc++-v3/intl/Makefile.in
+++ b/libstdc++-v3/intl/Makefile.in
@@ -105,6 +105,7 @@ LIBMATH_INCLUDES = @LIBMATH_INCLUDES@
LIBSUPCXX_INCLUDES = @LIBSUPCXX_INCLUDES@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
diff --git a/libstdc++-v3/libio/Makefile.in b/libstdc++-v3/libio/Makefile.in
index 2f1f6ac68a0c..4965a7b31acc 100644
--- a/libstdc++-v3/libio/Makefile.in
+++ b/libstdc++-v3/libio/Makefile.in
@@ -103,6 +103,7 @@ LIBMATH_INCLUDES = @LIBMATH_INCLUDES@
LIBSUPCXX_INCLUDES = @LIBSUPCXX_INCLUDES@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
diff --git a/libstdc++-v3/libmath/Makefile.in b/libstdc++-v3/libmath/Makefile.in
index e360eb8b3b67..b1466b8cb16d 100644
--- a/libstdc++-v3/libmath/Makefile.in
+++ b/libstdc++-v3/libmath/Makefile.in
@@ -105,6 +105,7 @@ LIBMATH_INCLUDES = @LIBMATH_INCLUDES@
LIBSUPCXX_INCLUDES = @LIBSUPCXX_INCLUDES@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
diff --git a/libstdc++-v3/libsupc++/Makefile.in b/libstdc++-v3/libsupc++/Makefile.in
index 313f179c67f7..d8cf667788a3 100644
--- a/libstdc++-v3/libsupc++/Makefile.in
+++ b/libstdc++-v3/libsupc++/Makefile.in
@@ -102,6 +102,7 @@ LIBMATHOBJS = @LIBMATHOBJS@
LIBMATH_INCLUDES = @LIBMATH_INCLUDES@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
diff --git a/libstdc++-v3/po/Makefile.in b/libstdc++-v3/po/Makefile.in
index 3a606fdb40db..9bb90b228e8a 100644
--- a/libstdc++-v3/po/Makefile.in
+++ b/libstdc++-v3/po/Makefile.in
@@ -105,6 +105,7 @@ LIBMATH_INCLUDES = @LIBMATH_INCLUDES@
LIBSUPCXX_INCLUDES = @LIBSUPCXX_INCLUDES@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
diff --git a/libstdc++-v3/porting.texi b/libstdc++-v3/porting.texi
index 87111e709b8e..9114806b63f5 100644
--- a/libstdc++-v3/porting.texi
+++ b/libstdc++-v3/porting.texi
@@ -74,6 +74,7 @@ Here are the primary steps required to port the library:
* 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
@@ -436,6 +437,31 @@ __atomic_add (_Atomic_word* __mem, int __val)
@}
@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 ---------------------------------------------------------------------
diff --git a/libstdc++-v3/src/Makefile.in b/libstdc++-v3/src/Makefile.in
index 0839375cf7af..c1b76a225b17 100644
--- a/libstdc++-v3/src/Makefile.in
+++ b/libstdc++-v3/src/Makefile.in
@@ -99,6 +99,7 @@ INTLOBJS = @INTLOBJS@
LIBMATHOBJS = @LIBMATHOBJS@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
diff --git a/libstdc++-v3/testsuite/Makefile.in b/libstdc++-v3/testsuite/Makefile.in
index 3bf801b4c74e..1d6dcce2348c 100644
--- a/libstdc++-v3/testsuite/Makefile.in
+++ b/libstdc++-v3/testsuite/Makefile.in
@@ -105,6 +105,7 @@ LIBMATH_INCLUDES = @LIBMATH_INCLUDES@
LIBSUPCXX_INCLUDES = @LIBSUPCXX_INCLUDES@
LIBSUPCXX_PICFLAGS = @LIBSUPCXX_PICFLAGS@
LIBTOOL = @LIBTOOL@
+LIMITS_INC_SRCDIR = @LIMITS_INC_SRCDIR@
LN_S = @LN_S@
MAINT = @MAINT@
MAKEINFO = @MAKEINFO@
--
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