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author | Ulrich Drepper <drepper@redhat.com> | 1996-12-08 08:01:13 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 1996-12-08 08:01:13 +0000 |
commit | f65fd747b440ae2d8a7481ecc50e668c5e4d0cc9 (patch) | |
tree | f64c3eeda0e9acc58b96c28ca852a014c822047f /manual/intro.texi | |
parent | 42054ddb496798d9b936490cf0050f6619f86bc1 (diff) | |
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update from main archive 961207cvs/libc-961208
Sun Dec 8 06:56:49 1996 Ulrich Drepper <drepper@cygnus.com>
* io/getwd.c: Use PATH_MAX not LOCAL_PATH_MAX. Fix typo in
comment.
* stdlib/canonicalize.c: Correct bugs in last change.
Patch by HJ Lu.
* libio/Makefile (routines): Remove ioprims.
(aux): Remove cleanup.
Add IO_DEBUG option for .o files.
* libio/cleanups.c: Removed.
* libio/ioprims.c: Removed.
* libio/filedoalloc.c: More updates from libg++-2.8b5.
* libio/fileops.c: Likewise.
* libio/genops.c: Likewise.
* libio/iolibio.h: Likewise.
* libio/iopopen.c: Likewise.
* libio/iovsprintf.c: Likewise.
* libio/iovsscanf.c: Likewise.
* libio/libio.h: Likewise.
* libio/libioP.h: Likewise.
* libio/memstream.c: Likewise.
* libio/strfile.h: Likewise.
* libio/vasprintf.c: Likewise.
* libio/vsnprintf.c: Likewise.
* libio/stdio.h: Define P_tmpdir only is __USE_SVID.
* manual/arith.texi: Change references to ANSI C to ISO C.
* manual/conf.texi: Likewise.
* manual/creature.texi: Likewise.
* manual/ctype.texi: Likewise.
* manual/errno.texi: Likewise.
* manual/filesys.texi: Likewise.
* manual/intro.texi. Likewise.
* manual/io.texi: Likewise.
* manual/lang.texi: Likewise.
* manual/libc.texinfo: Likewise.
* manual/locale.texi: Likewise.
* manual/maint.texi: Likewise.
* manual/mbyte.texi: Likewise.
* manual/memory.texi: Likewise.
* manual/process.texi: Likewise.
* manual/process.texi: Likewise.
* manual/search.texi: Likewise.
* manual/setjmp.texi: Likewise.
* manual/signal.texi: Likewise.
* manual/startup.texi: Likewise.
* manual/stdio.texi: Likewise.
* manual/string.texi: Likewise.
* manual/time.texi: Likewise.
* manual/locale.texi: Remove description of LC_RESPONSE and add
LC_MESSAGES.
* Makefile (subdirs): Change malloc in $(malloc).
* config.make.in: Add variable malloc which is initialized from
@malloc@.
* configure.in: Add new option --enable-new-malloc to use new
malloc. This is the default on Linux.
* sysdeps/unix/sysv/linux/configure.in: Define malloc to new-malloc
by default.
* new-malloc/Makefile: New file. Improved malloc implementation.
* new-malloc/malloc.c: Likewise.
* new-malloc/malloc.h: Likewise.
* new-malloc/mallocbug.c: Likewise.
* new-malloc/obstack.c: Likewise.
* new-malloc/obstack.h: Likewise.
* new-malloc/thread-m.h: Likewise.
* time/Makefile: Compile ap.c with NO_MCHECK flag for now.
* time/ap.c: Don't call mcheck if NO_MCHECK is defined.
* resolv/Makefile: Add rule to rebuiild libresolv.so when libc.so
changed.
* stdio/feof.c: Update copyright.
* stdio/stdio.h: Add field for lock to FILE structure.
Add cast to *MAGIC constants to prevent warnings.
* stdio-common/bug7.c: Correct test. Stream must not be closed
twice.
* stdlib/Makefile (routines): Add secure-getenv.
* stdlib/secure-getenv.c: New file. __secure_getenv function
moved to here from sysdeps/generic/getenv.c. Otherwise an
application cannot replace the getenv function in the libc.
* sysdeps/generic/getenv.c: Remove __secure_getenv function.
* sysdeps/stub/getenv.c: Remove __secure_getenv alias.
* sysdeps/mach/libc-lock.h: Define__libc_mutex_lock to __mutex_lock.
* sysdeps/posix/fdopen.c: Update copyright. Don't use EXFUN.
* time/test-tz.c: Comment fifth test out. PROBLEM.
* time/tzset.c: De-ANSI-declfy.
(__tzset): Don't increment pointer tz when no DST information is
given.
Sat Dec 7 23:47:54 1996 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/mach/libc-lock.h [_LIBC]: Add definition of
__libc_mutex_lock.
Patch by Thomas Bushnell.
* sysdeps/unix/sysv/linux/timebits.h: Load <asm/param.h> only
if __USE_MISC.
* sysdeps/unix/sysv/linux/Dist: Add llseek.c.
Sat Dec 7 12:18:56 1996 Ulrich Drepper <drepper@cygnus.com>
* time/strftime (%c format): Remove %Z from default string.
Reported by Paul Eggert
* io/getwd.c: Don't apply getcwd on user supplied buffer.
Diffstat (limited to 'manual/intro.texi')
-rw-r--r-- | manual/intro.texi | 56 |
1 files changed, 30 insertions, 26 deletions
diff --git a/manual/intro.texi b/manual/intro.texi index 382f35c039..b4cb344915 100644 --- a/manual/intro.texi +++ b/manual/intro.texi @@ -9,7 +9,7 @@ programs. @cindex library The GNU C library, described in this document, defines all of the -library functions that are specified by the ANSI C standard, as well as +library functions that are specified by the @w{ISO C} standard, as well as additional features specific to POSIX and other derivatives of the Unix operating system, and extensions specific to the GNU system. @@ -33,8 +33,8 @@ portability. This manual is written with the assumption that you are at least somewhat familiar with the C programming language and basic programming -concepts. Specifically, familiarity with ANSI standard C -(@pxref{ANSI C}), rather than ``traditional'' pre-ANSI C dialects, is +concepts. Specifically, familiarity with ISO standard C +(@pxref{ISO C}), rather than ``traditional'' pre-ISO C dialects, is assumed. The GNU C library includes several @dfn{header files}, each of which @@ -61,7 +61,7 @@ specific information about them. @cindex standards This section discusses the various standards and other sources that the -GNU C library is based upon. These sources include the ANSI C and +GNU C library is based upon. These sources include the @w{ISO C} and POSIX standards, and the System V and Berkeley Unix implementations. The primary focus of this manual is to tell you how to make effective @@ -77,44 +77,48 @@ other symbols provided by the library. This list also states which standards each function or symbol comes from. @menu -* ANSI C:: The American National Standard for the - C programming language. -* POSIX:: The IEEE 1003 standards for operating - systems. +* ISO C:: The international standard for the C + programming language. +* POSIX:: The ISO/IEC 9945 (aka IEEE 1003) standards + for operating systems. * Berkeley Unix:: BSD and SunOS. * SVID:: The System V Interface Description. @end menu -@node ANSI C, POSIX, , Standards and Portability -@subsection ANSI C -@cindex ANSI C +@node ISO C, POSIX, , Standards and Portability +@subsection ISO C +@cindex ISO C The GNU C library is compatible with the C standard adopted by the American National Standards Institute (ANSI): -@cite{American National Standard X3.159-1989---``ANSI C''}. +@cite{American National Standard X3.159-1989---``ANSI C''} and later +by the International Standardization Organizaion (ISO): +@cite{ISO/IEC 9899:1990, ``Programming languages---C''}. +We here refer to the standard as @w{ISO C} since this is the more +general standard in respect of ratification. The header files and library facilities that make up the GNU library are -a superset of those specified by the ANSI C standard.@refill +a superset of those specified by the @w{ISO C} standard.@refill @pindex gcc -If you are concerned about strict adherence to the ANSI C standard, you +If you are concerned about strict adherence to the @w{ISO C} standard, you should use the @samp{-ansi} option when you compile your programs with -the GNU C compiler. This tells the compiler to define @emph{only} ANSI +the GNU C compiler. This tells the compiler to define @emph{only} ISO standard features from the library header files, unless you explicitly ask for additional features. @xref{Feature Test Macros}, for information on how to do this. -Being able to restrict the library to include only ANSI C features is -important because ANSI C puts limitations on what names can be defined +Being able to restrict the library to include only @w{ISO C} features is +important because @w{ISO C} puts limitations on what names can be defined by the library implementation, and the GNU extensions don't fit these limitations. @xref{Reserved Names}, for more information about these restrictions. This manual does not attempt to give you complete details on the -differences between ANSI C and older dialects. It gives advice on how +differences between @w{ISO C} and older dialects. It gives advice on how to write programs to work portably under multiple C dialects, but does not aim for completeness. -@node POSIX, Berkeley Unix, ANSI C, Standards and Portability +@node POSIX, Berkeley Unix, ISO C, Standards and Portability @subsection POSIX (The Portable Operating System Interface) @cindex POSIX @cindex POSIX.1 @@ -128,8 +132,8 @@ Interface for Computer Environments}. POSIX is derived mostly from various versions of the Unix operating system. The library facilities specified by the POSIX standards are a superset -of those required by ANSI C; POSIX specifies additional features for -ANSI C functions, as well as specifying new additional functions. In +of those required by @w{ISO C}; POSIX specifies additional features for +@w{ISO C} functions, as well as specifying new additional functions. In general, the additional requirements and functionality defined by the POSIX standards are aimed at providing lower-level support for a particular kind of operating system environment, rather than general @@ -139,7 +143,7 @@ system environments.@refill The GNU C library implements all of the functions specified in @cite{IEEE Std 1003.1-1990, the POSIX System Application Program Interface}, commonly referred to as POSIX.1. The primary extensions to -the ANSI C facilities specified by this standard include file system +the @w{ISO C} facilities specified by this standard include file system interface primitives (@pxref{File System Interface}), device-specific terminal control functions (@pxref{Low-Level Terminal Interface}), and process control functions (@pxref{Processes}). @@ -175,7 +179,7 @@ The GNU C library defines facilities from some versions of Unix which are not formally standardized, specifically from the 4.2 BSD, 4.3 BSD, and 4.4 BSD Unix systems (also known as @dfn{Berkeley Unix}) and from @dfn{SunOS} (a popular 4.2 BSD derivative that includes some Unix System -V functionality). These systems support most of the ANSI and POSIX +V functionality). These systems support most of the @w{ISO C} and POSIX facilities, and 4.4 BSD and newer releases of SunOS in fact support them all. The BSD facilities include symbolic links (@pxref{Symbolic Links}), the @@ -193,7 +197,7 @@ the AT&T Unix System V operating system. It is to some extent a superset of the POSIX standard (@pxref{POSIX}). The GNU C library defines some of the facilities required by the SVID -that are not also required by the ANSI or POSIX standards, for +that are not also required by the @w{ISO C} or POSIX standards, for compatibility with System V Unix and other Unix systems (such as SunOS) which include these facilities. However, many of the more obscure and less generally useful facilities required by the SVID are @@ -295,7 +299,7 @@ program needs to include multiple header files, the order in which they are included doesn't matter. @strong{Compatibility Note:} Inclusion of standard header files in any -order and any number of times works in any ANSI C implementation. +order and any number of times works in any @w{ISO C} implementation. However, this has traditionally not been the case in many older C implementations. @@ -384,7 +388,7 @@ just makes your program slower. @cindex name space The names of all library types, macros, variables and functions that -come from the ANSI C standard are reserved unconditionally; your program +come from the @w{ISO C} standard are reserved unconditionally; your program @strong{may not} redefine these names. All other library names are reserved if your program explicitly includes the header file that defines or declares them. There are several reasons for these |