Hi, Gals and Guys,

The Linux C library 5.4.46 is a bug-fixing release for libc 5.4.44.
There are no new features in this release. This is the last release of
libc 5.4.xx. All my machines are now running RedHat 5.1 which is based
on glibc 2, aka libc 6. Please check the glibc 2 web site for details.

http://www.gnu.org/software/libc/libc.html

I really enjoyed working on the Linux C library with all the people
over the years. Without you, Linux cannot be what it is today. Thanks
to your support, we did it. Now it is the time to move on to libc 6,
aka glibc 2. I will be working on glibc 2 as a developer, but not as
a maintainer, Ulrich has been doing a great job on maintaining glibc 2.
I will try to answer all the concerns over libc 5 vs. libc 6 as well
as the bug issuses related to libc 6.

Changes from libc 5.4.44:

1. Security fixes.
2. Malloc fix.

The public release of the new Linux C library is 6.0, aka glibc 2.0.
2 main features in glibc 2.0, are MT-safe and pthread support. With
glibc 2.0, Linux will enter an era of SMP kernel support as well as
the kernel-based pthread support. I have been running glibc 2.0 with
gcc, binutils, bin86 and XFree86 3.3.1. Everything works great. As of
glibc 2.0.6, glibc is usable for general public. People are encouraged
to try it out and send in bug report. glibc 2.0 can be found at

ftp://ftp.gnu.org/pub/gnu

and its mirror sites. It compiles right out of box for Linux and
suppors more architectures in addition to x86 and m68k. There are
new Linux packages which is based on glibc 2, aka libc 6. You
can get more information from

http://www.debian.org
http://www.redhat.com

Due to the new, improved locale, the Linux C library 5.4.46 is binary
compatible with libc 5.3.12 but not vice versa. The binaries
compiled/linked with libc.so.5.4.46 may not run with libc.so.5.3.12.
You may need to regenerate locale files for the new locale in libc
5.4.46 if you use locales other tha C/POSIX which are the defaults.

Binaries of locale and localedef are included in the binary release.
The locale sources are at

ftp://dkuug.dk/i18n/WG15-collection/locales

But if you want to really use locale, you should use glibc 2, aka
libc 6. There will be no new locale development in libc 5.

There are many security bug fixes. Please consult ChangeLog for
details. Please let me know if there are more security bugs remains.

This is the public release of the Linux C library 5.4.46. Please read
the ChangeLog for details regarding changes/bug fixes.

DISTRIBUTION SITES:

The primary FTP sites for the compiler/C library are:

*     ftp://tsx-11.mit.edu/pub/linux/packages/GCC
*     ftp://sunsite.unc.edu/pub/Linux/GCC

DISTRIBUTION FILES:

1.      libc-5.4.46.bin.tar.gz

REQUIRED. This package contains the header files for libc, shared and
static ELF libraries libc and libm, and the static ELF library libbsd.a.
The header files in libc-5.4.46.bin.tar.gz are not complete. You need to
install the kernel source tree for the system-dependent header files.

The header files are in lib-x.y.z.bin.tar.gz and libc-x.y.z.tar.gz. You
can do

# gzip -dc lib-x.y.z.bin.tar.gz | tar xvvf - usr/include

to extract the header files without the binaries files. A separate
tar file for the header files may cause unnecessary confusion.

2.      libc-5.4.46.tar.gz

Source tree for libc and header files.

3.      libc-5.4.44-5.4.46.diff.gz

Context diffs against the source tree from the previous libc release.
Please make sure the empty libc/regex/rx.h is deleted.

MISSING LIBRARIES:

The only libraries included in this package are the Linux C library, libc
and the math library, libm.

ELF versions of libraries formerly included in the libc package can be
found at the following FTP sites:

* gdbm          ftp://sunsite.unc.edu/pub/Linux/libs/db/gdbm-1.7.3-ELF.tar.gz
* db            ftp://sunsite.unc.edu/pub/Linux/libs/db/db-1.85.2.bin.tar.gz
* ncurses       ftp://ftp.tos.net/pub/linux/ncurses
* termcap       ftp://tsx-11.mit.edu/pub/linux/packages/GCC
               ftp://sunsite.unc.edu/pub/Linux/GCC

Gertjan van Wingerde ([email protected]) maintains the ELF db package.

Christopher Wiles ([email protected]) maintains the ELF gdbm and
curses.

MacGyver <[email protected]> maintains the ELF ncurses.

NOTE: I strongly suggest using ncurses to replace curses/termcap. The
current ncurses supports ELF.

SYSTEM REQUIREMENTS:

*       kernel 1.1.92 or above.  It may work with an older kernel if
       the QMAGIC format is supported. If you use the kernel 1.3.x,
       you should upgrade to 1.3.40 or above. Otherwise readv/writev
       system calls won't work right.
       To compile the MIT pthread kernel, I only builed it with
       Linux kernel source code 1.99.10. You can comment out
       pthreads in DIRS in libc/sysdeps/Makefile.
*       gcc-2.7.2.3 or above and binutils-2.8.1.0.1 or above.
*       ld.so-1.9.5 or above.  The latest version can be obtained from
       ftp://ftp.ods.com/pub/linux
*       libg++ 2.7.2.8 or above.  This is only necessary for development
       using c++.

BINARY INSTALLATION:

Ensure that /usr/include/asm and /usr/include/linux are a symlinks to
their counterparts in the kernel source tree.  For example, if your kernel
source resides within /usr/src/linux, execute:

ln -s -f /usr/src/linux/include/asm /usr/include/asm
ln -s -f /usr/src/linux/include/linux /usr/include/linux

As some programs need <linux/autoconf.h>, the following two commands may
be necessary to generate that header file:

cd /usr/src/linux
make config

Verify that /var/run/utmp and /var/log/wtmp exist.  Replace all other
occurances of utmp and wtmp (/etc/utmp, for example) with symlinks.

Assuming the libc binary tarfile is in /, and as root, execute:

cd /
rm -f /lib/libc.so /lib/libm.so
rm -f /usr/lib/libc.so /usr/lib/libm.so
rm -f /usr/include/iolibio.h /usr/include/iostdio.h
rm -f /usr/include/wcstr.h /usr/include/mbstr.h
rm -f /usr/include/ld_so_config.h /usr/include/localeinfo.h
rm -rf /usr/include/netinet /usr/include/net /usr/include/pthread
gzip -dc libc-5.4.46.bin.tar.gz | tar xvf -

SOURCE INSTALLATION:

Unpack the libc source tarfile in your source directory.  Refer to the
README for compilation instructions.

COMPATIBILITY NOTES:

If your kernel uses system call numbers 135 to 146 for unintended
purposes, this library may not work for you. One example is the kswap
kernel patch for 1.2.x uses the same system call numbers for other
uses. That breaks this library. Please compare/check <sys/syscall.h>,
<asm/unistd.h> and <linux/unistd.h>. You have to make sure those
system call numbers are consistent from libc to your kernel.

There is no support for a.out libraries in this source tree.  The latest
version of the a.out library suite is libc-4.7.5, which can be obtained
from one of the ftp sites listed below.

The structure DIR, defined in sysdeps/linux/dirstream.h, was changed in
release 5.2.0.  If you upgrade from release 5.1.4 or earlier to release
5.2.0 or later, you must reboot after installing the new libraries.  If
you compile your own library, *do not* "make install".  Instead, copy the
new libc.so* to /lib, do "ldconfig -v", reboot, then do "make install"

A dirent bug, which erroneously defined d->reclen to d->namlen if USE_GNU
was defined, has been fixed.  Unfortunately, some GNU packages depend on
this bug.  GNU make 3.xx is one of them. GNU make 3.75 or above is
fine. A patch is included here for 3.74 and below.

A back door has been added for the file descriptor in DIR.  You need to
define DIRENT_ILLEGAL_ACCESS to access the dd_fd field.  You should use
dirfd () to get the the file descriptor in DIR.  Use this at your own
risk.

A new dirent bug is fixed. The ELF nfsd should work fine.

<iostdio.h> and <iolibio.h> have been removed.

PTHREAD NOTES:

The MIT pthread library is not supported in libc 5.4.x. The new
kernel-based pthread will be in libc 6.0.

NYS NOTES:

NYS binaries are not provided this time.  NYS 0.27.4 is included in the
source tree as a compile-time option.  Please consult README.nys and other
applicable NYS documents before attempting NYS installation. I disabled
DBM for NYS. Some changes are needed to support non-builtin dbm.

INFORMATION/DOCUMENTATION:

ELF related WWW pages:

*       http://www.intac.com/~cully/elf.html
*       http://www.sjc.ox.ac.uk/users/barlow/linux-gcc.html
*       http://www.blackdown.org/elf/elf.html

ELF documentation:

*       ftp://sunsite.unc.edu/pub/Linux/GCC/elf.ps.gz
*       ftp://sunsite.unc.edu/pub/Linux/GCC/elf.latex.tar.gz
*       ftp://sunsite.unc.edu/pub/Linux/GCC/ELF.doc.tar.gz

H.J.
[email protected]
07/19/98

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