324 lines
14 KiB
Plaintext
324 lines
14 KiB
Plaintext
GNU C Library NEWS -- history of user-visible changes. 26 January 1995
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Copyright (C) 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
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See the end for copying conditions.
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Please send GNU C library bug reports to bug-glibc@prep.ai.mit.edu.
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Version 1.10
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* The library has changed from using GNU ld symbol aliases to using weak
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symbols where available. The ELF object file format supports weak
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symbols; GNU ld also supports weak symbols in the a.out format. (There
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is also now support for other GNU ld extensions in ELF. Use the
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`--with-elf' option to configure to indicate you have elf, and
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`--with-gnu-ld' if using GNU ld.) This changed resulted in the deletion
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of many files which contained only symbol aliases, reducing the size of
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the source and the compiled library; many other files were renamed to
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less cryptic names previously occupied by the symbol alias files.
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* The pgrp functions have been regularized, slightly incompatibly but much
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less confusingly. The core functions are now `getpgid' and `setpgid',
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which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
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argument) and BSD `setpgrp' (identical to `setpgid') functions are
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provided for compatibility. There is no longer an incompatible `getpgrp'
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with an argument declared under _BSD_SOURCE; no BSD code uses it.
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* The new header file <fts.h> and suite of functions simplify programs that
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operate on directory trees. This code comes from 4.4 BSD.
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* Converted to Autoconf version 2, so `configure' has more options.
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Run `configure --help' to see the details.
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* The resolver code has been updated from the BIND-4.9.3-BETA14 release.
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* The new function `malloc_find_object_address' finds the starting address
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of a malloc'd block, given any address within the block. This can be
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useful for debugging.
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* The new functions `strtoq' and `strtouq' parse integer values from
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strings, like `strtol' and `strtoul', but they return `long long int' and
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`unsigned long long int' values, respectively (64-bit quantities).
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* There is a new malloc debugging hook `__memalign_hook'.
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* There are new typedefs `ushort' for `unsigned short int' and `uint' for
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`unsigned int' in <sys/types.h>. These are for compatibility only and
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their use is discouraged.
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* The `-lmcheck' library to enable standard malloc debugging hooks is now
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done differently, so that it works even without GNU ld.
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Version 1.09
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* For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
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* New header file <fstab.h> and new functions `getfsspec', `getfsent' and
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friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
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* The new function `daemon' from 4.4 BSD is useful for server programs that
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want to put themselves in the background.
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* Joel Sherrill has contributed support for several standalone boards that
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run without an operating system.
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* `printf', `scanf' and friends now accept a `q' type modifier for long
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long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
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* All of the code taken from BSD (notably most of the math and networking
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routines) has been updated from the BSD 4.4-Lite release.
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* The resolver code has been updated from the BIND-4.9.3-BETA9 release.
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* The new functions `getdomainname' and `setdomainname' fetch or change the
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YP/NIS domain name. These are system calls which exist on systems which
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have YP (aka NIS).
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* The time zone data files have been updated for the latest international
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conventions.
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* The SunRPC programs `portmap' and `rpcinfo' are now installed in
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$(sbindir) (usually /usr/local/sbin) instead of $(bindir).
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Version 1.08
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* The C library now includes support for Sun RPC, from Sun's free
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RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
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are included. (There is still no support for YP.)
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* Tom Quinn has contributed a port of the C library to SGI machines running
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Irix 4 (mips-sgi-irix4).
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* The new `lockf' function is a simplified interface to the locking
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facilities of `fcntl', included for compatibility.
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* New time functions `timegm', `timelocal', and `dysize' for compatibility.
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* New header file <sys/timeb.h> and new function `ftime' for compatibility.
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* New header files <poll.h> and <sys/poll.h> and new function `poll' for
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compatibility.
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* The error message printed by `assert' for a failed assertion now includes
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the name of the program (if using GNU ld) and the name of the calling
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function (with versions of GCC that support this).
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* The `psignal' function is now declared in <signal.h>, not <stdio.h>.
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* The library now includes the <sys/mman.h> header file and memory
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management functions `mmap', `munmap', `mprotect', `msync', and
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`madvise', on systems that support those facilities.
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* The interface for `mcheck' has changed slightly: the function called to
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abort the program when an allocation inconsistency is detected now takes
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an argument that indicates the type of failure. The new function
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`mprobe' lets you request a consistency check for a particular block at
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any time (checks are normally done only when you call `free' or `realloc'
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on a block).
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* It is now possible to easily cross-compile the C library, building on one
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system a library to run on another machine and/or operating system. All
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you need to do is set the variable `HOST_CC' in `configparms' to the
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native compiler for programs to run on the machine you are building on (a
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few generator programs are used on Unix systems); set `CC' to the
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cross-compiler.
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* The new function `fexecve' (only implemented on the GNU system) executes
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a program file given a file descriptor already open on the file.
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Version 1.07
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* Brendan Kehoe has contributed most of a port to the DEC Alpha
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running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
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* You can set the variable `libprefix' in `configparms' to specify a prefix
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to be prepended to installed library files; this makes it easy to install
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the GNU C library to be linked as `-lgnuc' or whatever.
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* The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
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copies a limited number of characters from a string, and returns the
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address of the last character written.
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* You no longer need to check for whether the installed `stddef.h' is
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compatible with the GNU C library. configure now checks for you.
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* You can now define a per-stream `fileno' function to convert the
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stream's cookie into an integral file descriptor.
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* ``malloc (0)'' no longer returns a null pointer. Instead, it
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allocates zero bytes of storage, and returns a unique pointer which
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you can pass to `realloc' or `free'. The behavior is undefined if
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you dereference this pointer.
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* The C library now runs on Sony NEWS m68k machines running either
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NewsOS 3 or NewsOS 4.
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* The new `syscall' function is a system-dependent primitive function
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for invoking system calls. It has the canonical behavior on Unix
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systems, including unreliable return values for some calls (such as
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`pipe', `fork' and `getppid').
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* The error code `EWOULDBLOCK' is now obsolete; it is always defined
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to `EAGAIN', which is the preferred name. On systems whose kernels
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use two distinct codes, the C library now translates EWOULDBLOCK to
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EAGAIN in every system call function.
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Version 1.06
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* The GNU C Library Reference Manual is now distributed with the library.
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`make dvi' will produce a DVI file of the printed manual.
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`make info' will produce Info files that you can read on line using C-h i
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in Emacs or the `info' program.
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Please send comments on the manual to bug-glibc-manual@prep.ai.mit.edu.
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* The library now supports SVR4 on i386s (i386-unknown-sysv4).
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* Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
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* Jason Merrill has contributed a port to the Sequent Symmetry running
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Dynix version 3 (i386-sequent-dynix).
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* The library has been ported to i386s running SCO 3.2.4 (also known as SCO
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ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
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* New function `memory_warnings' lets you arrange to get warnings when
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malloc is running out of memory to allocate, like Emacs gives you.
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* The C library now contains the relocating allocator used in Emacs 19 for
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its editing buffers. This allocator (ralloc) minimizes allocation
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overhead and fragmentation by moving allocated regions around whenever it
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needs to. You always refer to a ralloc'd region with a "handle" (a
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pointer to a pointer--an object of type `void **').
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* There is a new `printf' format: `%m' gives you the string corresponding
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to the error code in `errno'.
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* In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
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or `%[' conversion, but instead of filling in a fixed-sized buffer you
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pass, the `a' modifier says to fill in a `char **' you pass with a
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malloc'd string.
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* The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
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`FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
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name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
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* `mkstemp' is a traditional Unix function to atomically create and open a
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uniquely-named temporary file.
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Version 1.05
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* The standard location for the file that says what the local timezone is
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has changed again. It is now `/usr/local/etc/localtime' (or more
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precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
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* The distribution no longer contains any files with names longer than 14
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characters.
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* `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
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These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
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* New functions `ttyslot' and `syslog' from 4.4 BSD.
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Version 1.04
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* The configuration process has changed quite a bit. The `configure'
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script is now used just like the configuration scripts for other GNU
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packages. The `sysdeps' directory hierarchy is much rearranged.
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The file `INSTALL' explains the new scheme in detail.
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* The header files no longer need to be processed into ANSI C and
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traditional C versions. There is just one set of files to install, and
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it will work with ANSI or old C compilers (including `gcc -traditional').
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* Brendan Kehoe and Ian Lance Taylor have ported the library to the
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MIPS DECStation running Ultrix 4.
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* The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
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Tom Quinn contributed the initial code. The GNU C library can NOT yet be
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made itself into a shared library.
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* Yet further improved support for the i386, running 4.3 BSD-like systems
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(such as Mach 3 with the Unix single-server), or System V.
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* New function `strncasecmp' to do case-insensitive string comparison
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with limited length.
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* New function `strsep' is a reentrant alternative to `strtok'.
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* New functions `scandir' and `alphasort' for searching directories.
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* New function `setenv' is a better interface to `putenv'.
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* Ian Lance Taylor has contributed an implementation of the SVID `ftw'
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function for traversing a directory tree.
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* The GNU obstack package is now also part of the C library.
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The new function `open_obstack_stream' creates a stdio stream that
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writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
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formatted output directly to an obstack.
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* Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
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cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
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* `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
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* The new functions `strfry' and `memfrob' do mysterious and wonderful
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things to your strings.
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* There are some new test programs: test-fseek, testmb, and testrand.
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* Some work has been done to begin porting the library to 4.4 BSD and Linux.
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These ports are not finished, but are a good starting place for really
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supporting those systems.
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* `/etc/localtime' is now the standard location for the file that says what
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the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
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This follows the general principle that `/etc' is the place for all local
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configuration files.
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* The C library header files now use `extern "C"' when used by the C++
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compiler, so the C library should now work with C++ code.
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* The header file <bstring.h> is gone. <string.h> now declares bcopy,
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bcmp, bzero, and ffs.
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* Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
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function which uses the `merge sort' algorithm, and is said to be
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significantly faster than the old GNU `qsort' function. Merge sort is
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now the standard `qsort' function. The new algorithm can require a lot
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of temporary storage; so, the old sorting function is called when the
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required storage is not available.
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* The C library now includes Michael Glad's Ultra Fast Crypt, which
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provides the Unix `crypt' function, plus some other entry points.
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Because of the United States export restriction on DES implementations,
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we are distributing this code separately from the rest of the C library.
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There is an extra distribution tar file just for crypt; it is called
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`glibc-VERSION-crypt.tar.Z', e.g. `glibc-1.04-crypt.tar.Z'. You can just
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unpack the crypt distribution along with the rest of the C library and
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build; you can also build the library without getting crypt. Users
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outside the USA can get the crypt distribution via anonymous FTP from
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ftp.uni-c.dk [129.142.6.74], or another archive site outside the U.S.
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* The code and header files taken from 4.4 BSD have been updated with the
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latest files released from Berkeley.
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----------------------------------------------------------------------
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Copyright information:
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Copyright (C) 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
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Permission is granted to anyone to make or distribute verbatim copies
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of this document as received, in any medium, provided that the
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copyright notice and this permission notice are preserved,
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thus giving the recipient permission to redistribute in turn.
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Permission is granted to distribute modified versions
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of this document, or of portions of it,
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under the above conditions, provided also that they
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carry prominent notices stating who last changed them.
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Local variables:
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version-control: never
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end:
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