glibc/manual/maint.texi

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@node Maintenance, Contributors, Installation, Top
Update. 1998-07-10 18:14 -0400 Zack Weinberg <zack@rabi.phys.columbia.edu> * manual/Makefile: Overhauled. Generate libc.texinfo from the chapter files. Exorcise the chapters, chapters-incl mess. Support inserting doc chapters from add-on modules. (chapters): New variable. (add-chapters): New variable. (appendices): New variable. (libc.texinfo): New target. (clean): Fix bugs. (realclean): Fix bugs. * manual/texis.awk: New file. * manual/libc-texinfo.sh: New file. * manual/libc-texinfo.in: New file. * manual/conf.texi (top @node): Remove next pointer. * manual/lang.texi (top @node): Remove prev pointer. * manual/job.texi (top @node): Add explicit pointers. * manual/message.texi (top @node): Add explicit pointers. * manual/nss.texi (top @node): Add explicit pointers. * manual/process.texi (top @node): Add explicit pointers. * manual/startup.texi (top @node): Add explicit pointers. * manual/terminal.texi (top @node): Add explicit pointers. * manual/users.texi (top @node): Add explicit pointers. * manual/arith.texi: Add %MENU% tag. * manual/conf.texi: Add %MENU% tag. * manual/contrib.texi: Add %MENU% tag. * manual/ctype.texi: Add %MENU% tag. * manual/errno.texi: Add %MENU% tag. * manual/filesys.texi: Add %MENU% tag. * manual/header.texi: Add %MENU% tag. * manual/install.texi: Add %MENU% tag. * manual/intro.texi: Add %MENU% tag. * manual/io.texi: Add %MENU% tag. * manual/job.texi: Add %MENU% tag. * manual/lang.texi: Add %MENU% tag. * manual/llio.texi: Add %MENU% tag. * manual/locale.texi: Add %MENU% tag. * manual/maint.texi: Add %MENU% tag. * manual/math.texi: Add %MENU% tag. * manual/mbyte.texi: Add %MENU% tag. * manual/memory.texi: Add %MENU% tag. * manual/message.texi: Add %MENU% tag. * manual/nss.texi: Add %MENU% tag. * manual/pattern.texi: Add %MENU% tag. * manual/pipe.texi: Add %MENU% tag. * manual/process.texi: Add %MENU% tag. * manual/search.texi: Add %MENU% tag. * manual/setjmp.texi: Add %MENU% tag. * manual/signal.texi: Add %MENU% tag. * manual/socket.texi: Add %MENU% tag. * manual/startup.texi: Add %MENU% tag. * manual/stdio.texi: Add %MENU% tag. * manual/string.texi: Add %MENU% tag. * manual/sysinfo.texi: Add %MENU% tag. * manual/terminal.texi: Add %MENU% tag. * manual/time.texi: Add %MENU% tag. * manual/users.texi: Add %MENU% tag. 1998-07-13 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/i386/dl-procinfo.h (x86_cap_flags): Update. 1998-07-11 Andreas Jaeger <aj@arthur.rhein-neckar.de> * sysdeps/unix/sysv/linux/recvmsg.c (__libc_recvmsg): Use ANSI style declaration to avoid warning. * sysdeps/unix/sysv/linux/sendmsg.c (__libc_sendmsg): Likewise. 1998-07-04 Mark Kettenis <kettenis@phys.uva.nl> * elf/rtld.c (process_dl_debug): Add missing continue. 1998-07-12 Mark Kettenis <kettenis@phys.uva.nl> * elf/rtld.c (_dl_skip_args): Make global because the Hurd startup code needs it. 1998-07-10 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * Makeconfig ($(common-objpfx)sysd-dirs): Write out definition of sysd-dirs-done. * Makerules: Don't generate version maps too early. ($(common-objpfx)sysd-versions): Force regeneration if the list of subdirs has changed. 1998-07-10 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/dlfcn.h (DL_CALL_FCT): Use portable comma expression. 1998-07-11 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * iconv/gconv_db.c (gen_steps): Always set *handle and *nsteps. * iconv/gconv_dl.c (__gconv_find_shlib): Correct use of tfind return value. 1998-07-12 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/dl-open.c (dl_open_worker): New function. (_dl_open): Call it to do the actual work while catching errors. * elf/dl-close.c (_dl_close): Only call termination function if the initialisation function was called. 1998-07-13 Ulrich Drepper <drepper@cygnus.com> * libio/libioP.h (_IO_cleanup_registration_needed): Use __PMT. Reported by Felix von Leitner <leitner@amdiv.de>. 1998-07-13 10:28 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/rtld.c (process_dl_debug): Add missing continue. 1998-06-23 Mark Kettenis <kettenis@phys.uva.nl>
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@c %MENU% How to enhance and port the GNU C Library
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@appendix Library Maintenance
@menu
* Source Layout:: How to add new functions or header files
to the GNU C library.
* Porting:: How to port the GNU C library to
a new machine or operating system.
@end menu
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@node Source Layout
@appendixsec Adding New Functions
The process of building the library is driven by the makefiles, which
make heavy use of special features of GNU @code{make}. The makefiles
are very complex, and you probably don't want to try to understand them.
But what they do is fairly straightforward, and only requires that you
define a few variables in the right places.
The library sources are divided into subdirectories, grouped by topic.
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The @file{string} subdirectory has all the string-manipulation
functions, @file{math} has all the mathematical functions, etc.
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Each subdirectory contains a simple makefile, called @file{Makefile},
which defines a few @code{make} variables and then includes the global
makefile @file{Rules} with a line like:
@smallexample
include ../Rules
@end smallexample
@noindent
The basic variables that a subdirectory makefile defines are:
@table @code
@item subdir
The name of the subdirectory, for example @file{stdio}.
This variable @strong{must} be defined.
@item headers
The names of the header files in this section of the library,
such as @file{stdio.h}.
@item routines
@itemx aux
The names of the modules (source files) in this section of the library.
These should be simple names, such as @samp{strlen} (rather than
complete file names, such as @file{strlen.c}). Use @code{routines} for
modules that define functions in the library, and @code{aux} for
auxiliary modules containing things like data definitions. But the
values of @code{routines} and @code{aux} are just concatenated, so there
really is no practical difference.@refill
@item tests
The names of test programs for this section of the library. These
should be simple names, such as @samp{tester} (rather than complete file
names, such as @file{tester.c}). @w{@samp{make tests}} will build and
run all the test programs. If a test program needs input, put the test
data in a file called @file{@var{test-program}.input}; it will be given to
the test program on its standard input. If a test program wants to be
run with arguments, put the arguments (all on a single line) in a file
called @file{@var{test-program}.args}. Test programs should exit with
zero status when the test passes, and nonzero status when the test
indicates a bug in the library or error in building.
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@item others
The names of ``other'' programs associated with this section of the
library. These are programs which are not tests per se, but are other
small programs included with the library. They are built by
@w{@samp{make others}}.@refill
@item install-lib
@itemx install-data
@itemx install
Files to be installed by @w{@samp{make install}}. Files listed in
@samp{install-lib} are installed in the directory specified by
@samp{libdir} in @file{configparms} or @file{Makeconfig}
(@pxref{Installation}). Files listed in @code{install-data} are
installed in the directory specified by @samp{datadir} in
@file{configparms} or @file{Makeconfig}. Files listed in @code{install}
are installed in the directory specified by @samp{bindir} in
@file{configparms} or @file{Makeconfig}.@refill
@item distribute
Other files from this subdirectory which should be put into a
distribution tar file. You need not list here the makefile itself or
the source and header files listed in the other standard variables.
Only define @code{distribute} if there are files used in an unusual way
that should go into the distribution.
@item generated
Files which are generated by @file{Makefile} in this subdirectory.
These files will be removed by @w{@samp{make clean}}, and they will
never go into a distribution.
@item extra-objs
Extra object files which are built by @file{Makefile} in this
subdirectory. This should be a list of file names like @file{foo.o};
the files will actually be found in whatever directory object files are
being built in. These files will be removed by @w{@samp{make clean}}.
This variable is used for secondary object files needed to build
@code{others} or @code{tests}.
@end table
@node Porting
@appendixsec Porting the GNU C Library
The GNU C library is written to be easily portable to a variety of
machines and operating systems. Machine- and operating system-dependent
functions are well separated to make it easy to add implementations for
new machines or operating systems. This section describes the layout of
the library source tree and explains the mechanisms used to select
machine-dependent code to use.
All the machine-dependent and operating system-dependent files in the
library are in the subdirectory @file{sysdeps} under the top-level
library source directory. This directory contains a hierarchy of
subdirectories (@pxref{Hierarchy Conventions}).
Each subdirectory of @file{sysdeps} contains source files for a
particular machine or operating system, or for a class of machine or
operating system (for example, systems by a particular vendor, or all
machines that use IEEE 754 floating-point format). A configuration
specifies an ordered list of these subdirectories. Each subdirectory
implicitly appends its parent directory to the list. For example,
specifying the list @file{unix/bsd/vax} is equivalent to specifying the
list @file{unix/bsd/vax unix/bsd unix}. A subdirectory can also specify
that it implies other subdirectories which are not directly above it in
the directory hierarchy. If the file @file{Implies} exists in a
subdirectory, it lists other subdirectories of @file{sysdeps} which are
appended to the list, appearing after the subdirectory containing the
@file{Implies} file. Lines in an @file{Implies} file that begin with a
@samp{#} character are ignored as comments. For example,
@file{unix/bsd/Implies} contains:@refill
@smallexample
# BSD has Internet-related things.
unix/inet
@end smallexample
@noindent
and @file{unix/Implies} contains:
@need 300
@smallexample
posix
@end smallexample
@noindent
So the final list is @file{unix/bsd/vax unix/bsd unix/inet unix posix}.
Update. 1997-10-15 06:56 Ulrich Drepper <drepper@cygnus.com> * Rules: Remove ruls to magically install <subdir>.h headers. Reported by Mark Kettenis <kettenis@phys.uva.nl>. * glibcbug.in: Fix @gnu.ai.mit.edu -> @gnu.org. * version.c: Likewise. * catgets/gencat.c: Likewise. * db2/makedb.c: Likewise. * locale/programs/locale.c: Likewise. * locale/programs/localedef.c: Likewise. * libc.map: Move _IO_list_all back to GLIBC_2.0. * elf/rtld.c: Provide name of running program to _dl_new_object. * Rules: Implement shared-only-sources. * include/libc-symbols.h: Define default_symbol_version. * libio/Makefile (shared-only-sources): Define. * libio/freopen.c: Define as default version. * libio/iofopen.c: Likewise. * libio/genops.c: Define _IO_list_all here. * libio/stdfiles.c: Create linked list with public names. * libio/oldstdfiles.c: Likewise. * stdio-common/printf.c: Optimize. * stdio-common/scanf.c: Optimize. * sysdeps/generic/setfpucw.c: Include #include <...> not "...". * sysdeps/i386/i486/bits/string.h: Add optimized versions of index and rindex. 1997-10-14 Andreas Jaeger <aj@arthur.rhein-neckar.de> * manual/arith.texi: Spelling fixes. * manual/conf.texi: Likewise. * manual/creature.texi: Likewise. * manual/filesys.texi: Likewise. * manual/intro.texi: Likewise. * manual/llio.texi: Likewise. * manual/math.texi: Likewise. * manual/message.texi: Likewise. * manual/pattern.texi: Likewise. * manual/search.texi: Likewise. * manual/signal.texi: Likewise. * manual/socket.texi: Likewise. * manual/startup.texi: Likewise. * manual/stdio.texi: Likewise. * manual/string.texi: Likewise. * manual/time.texi: Likewise. * manual/users.texi: Likewise. 1997-10-13 05:25 Ulrich Drepper <drepper@cygnus.com> * sysdeps/generic/sys/mman.h: Use __ptr_t instead of __caddr_t. * sysdeps/unix/bsd/osf/sys/mman.h: Likewise. * sysdeps/unix/bsd/sun/sunos4/sys/mman.h: Likewise. * sysdeps/unix/bsd/ultrix4/sys/mman.h: Likewise. * sysdeps/unix/sysv/irix4/sys/mman.h: Likewise. * sysdeps/unix/sysv/linux/sys/mman.h: Likewise. * sysdeps/mach/hurd/mmap.c: Likewise. * sysdeps/generic/mmap.c: Likewise. * sysdeps/unix/bsd/sun/sunos4/mmap.c: Likewise. * sysdeps/mach/munmap.c: Likewise. * sysdeps/generic/munmap.c: Likewise. * sysdeps/mach/mprotect.c: Likewise. * sysdeps/generic/mprotect.c: Likewise. * sysdeps/generic/msync.c: Likewise. * sysdeps/generic/madvise.c: Likewise. * sysdeps/unix/sysv/linux/madvise.c: Include stub version from generic subdir. 1997-10-12 20:27 Zack Weinberg <zack@rabi.phys.columbia.edu> * sysdeps/stub (all files): Moved to sysdeps/generic. * all files using stub_warning: Include <stub-tag.h>. * include/stub-tag.h: New file, marks stubs in .d files. * Makerules: Look for stub-tag.h, not sysdeps/stub, when building <gnu/stubs.h>. * configure.in: Don't add sysdeps/stub to $sysnames. * sysdeps/unix/Makefile: Look for generic headers, not stub headers. * sysdeps/generic/Makefile: Likewise. * manual/maint.texi: Delete references to sysdeps/stub. * INSTALL: Rebuilt. * configure: Rebuilt.
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@file{sysdeps} has a ``special'' subdirectory called @file{generic}. It
is always implicitly appended to the list of subdirectories, so you
needn't put it in an @file{Implies} file, and you should not create any
subdirectories under it intended to be new specific categories.
@file{generic} serves two purposes. First, the makefiles do not bother
to look for a system-dependent version of a file that's not in
@file{generic}. This means that any system-dependent source file must
have an analogue in @file{generic}, even if the routines defined by that
[BZ #2510, BZ #2830, BZ #3137, BZ #3313, BZ #3426, BZ #3465, BZ #3480, BZ #3483, BZ #3493, BZ #3514, BZ #3515, BZ #3664, BZ #3673, BZ #3674] 2007-01-11 Jakub Jelinek <jakub@redhat.com> * sysdeps/i386/soft-fp/sfp-machine.h: Remove. * sysdeps/x86_64/soft-fp/sfp-machine.h: Likewise. 2007-01-10 Ulrich Drepper <drepper@redhat.com> * io/fts.c: Make sure fts_cur is always valid after return from fts_read. Patch by Miloslav Trmac <mitr@redhat.com>. 2006-10-27 Richard Sandiford <richard@codesourcery.com> * elf/elf.h (R_MIPS_GLOB_DAT): Define. (R_MIPS_NUM): Bump by 1. 2007-01-03 Jakub Jelinek <jakub@redhat.com> * posix/execvp.c: Include alloca.h. (allocate_scripts_argv): Renamed to... (scripts_argv): ... this. Don't allocate buffer here nor count arguments. (execvp): Use alloca if possible. * posix/Makefile: Add rules to build and run tst-vfork3 test. * posix/tst-vfork3.c: New test. * stdlib/Makefile (tst-strtod3-ENV): Define. 2007-01-02 Ulrich Drepper <drepper@redhat.com> * posix/getconf.c: Update copyright year. * nss/getent.c: Likewise. * iconv/iconvconfig.c: Likewise. * iconv/iconv_prog.c: Likewise. * elf/ldconfig.c: Likewise. * catgets/gencat.c: Likewise. * csu/version.c: Likewise. * elf/ldd.bash.in: Likewise. * elf/sprof.c (print_version): Likewise. * locale/programs/locale.c: Likewise. * locale/programs/localedef.c: Likewise. * nscd/nscd.c (print_version): Likewise. * debug/xtrace.sh: Likewise. * malloc/memusage.sh: Likewise. * malloc/mtrace.pl: Likewise. * debug/catchsegv.sh: Likewise. 2006-12-24 Ulrich Drepper <drepper@redhat.com> * malloc/malloc.c (sYSMALLOc): Remove some unnecessary alignment attempts. 2006-12-23 Ulrich Drepper <drepper@redhat.com> * posix/wordexp.c: Remove some unnecessary tests. 2006-12-20 SUGIOKA Toshinobu <sugioka@itonet.co.jp> * sysdeps/unix/sysv/linux/sh/bits/shm.h: New file. * nss/getXXbyYY_r.c: Include atomic.h. (INTERNAL (REENTRANT_NAME)): Write startp after start_fct, add atomic_write_barrier () in between. 2006-11-28 Jakub Jelinek <jakub@redhat.com> * elf/dl-support.c: Include dl-procinfo.h. * sysdeps/powerpc/dl-procinfo.h (PPC_PLATFORM_POWER4, PPC_PLATFORM_PPC970, PPC_PLATFORM_POWER5, PPC_PLATFORM_POWER5_PLUS, PPC_PLATFORM_POWER6, PPC_PLATFORM_CELL_BE, PPC_PLATFORM_POWER6X): Define. (_dl_string_platform): Use PPC_PLATFORM_* macros instead of hardcoded constants. * sysdeps/powerpc/dl-procinfo.c (_dl_powerpc_platform): Use PPC_PLATFORM_* macros for array designators. 2006-11-11 Steven Munroe <sjmunroe@us.ibm.com> * sysdeps/powerpc/dl-procinfo.c (_dl_powerpc_cap_flags): Add 3 new cap names to the beginning. (_dl_powerpc_platforms): Add "power6x". * sysdeps/powerpc/dl-procinfo.h (_DL_HWCAP_FIRST): Decrease. (HWCAP_IMPORTANT): Add PPC_FEATURE_HAS_DFP. (_DL_PLATFORMS_COUNT): Increase. (_dl_string_platform): Handle power6x case. * sysdeps/powerpc/sysdep.h (PPC_FEATURE_PA6T, PPC_FEATURE_HAS_DFP, PPC_FEATURE_POWER6_EXT): Define. (PPC_FEATURE_POWER5, PPC_FEATURE_POWER5_PLUS): Correct Comment. [-2^31 .. 2^31) range. * sysdeps/unix/sysv/linux/bits/statvfs.h: Define ST_RELATIME. * sysdeps/unix/sysv/linux/internal_statvfs.c (__statvfs_getflags): Handle relatime mount option. 2006-12-13 Jakub Jelinek <jakub@redhat.com> * sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S: Include kernel-features.h. 2006-12-11 Ulrich Drepper <drepper@redhat.com> * stdlib/strtod_l.c (____STRTOF_INTERNAL): Parse thousand separators also if no non-zero digits found. * stdlib/Makefile (tests): Add tst-strtod3. [BZ #3664] * stdlib/strtod_l.c (____STRTOF_INTERNAL): Fix test to recognize empty parsed strings. * stdlib/Makefile (tests): Add tst-strtod2. * stdlib/tst-strtod2.c: New file. [BZ #3673] * stdlib/strtod_l.c (____STRTOF_INTERNAL): Fix exp_limit computation. * stdlib/Makefile (tests): Add tst-atof2. * stdlib/tst-atof2.c: New file. [BZ #3674] * stdlib/strtod_l.c (____STRTOF_INTERNAL): Adjust exponent value correctly if removing trailing zero of hex-float. * stdlib/Makefile (tests): Add tst-atof1. * stdlib/tst-atof1.c: New file. * misc/mntent_r.c (__hasmntopt): Check p[optlen] even when p == rest. Start searching for next comma at p rather than rest. * misc/Makefile (tests): Add tst-mntent2. * misc/tst-mntent2.c: New test. 2006-12-08 Ulrich Drepper <drepper@redhat.com> * malloc/memusage.c: Handle realloc with new size of zero and non-NULL pointer correctly. (me): Really write first record twice. (struct entry): Make format bi-arch safe. (dest): Write out more realloc statistics. * malloc/memusagestat.c (struct entry): Make format bi-arch safe. 2006-12-05 Jakub Jelinek <jakub@redhat.com> * nis/nis_subr.c (nis_getnames): Revert last change. 2006-12-03 Kaz Kojima <kkojima@rr.iij4u.or.jp> * sysdeps/unix/sysv/linux/sh/sys/io.h: Removed. 2006-11-30 H.J. Lu <hongjiu.lu@intel.com> * sysdeps/i386/i686/memcmp.S: Use jump table as the base of jump table entries. 2006-11-30 Jan Kratochvil <jan.kratochvil@redhat.com> * sysdeps/unix/sysv/linux/i386/clone.S: Provide CFI for the outermost `clone' function to ensure proper unwinding stop of gdb. * sysdeps/unix/sysv/linux/x86_64/clone.S: Likewise. 2006-12-01 Ulrich Drepper <drepper@redhat.com> * nscd/nscd.init: Remove obsolete and commented-out -S option handling. 2006-11-23 Jakub Jelinek <jakub@redhat.com> [BZ #3514] * manual/string.texi (strncmp): Fix pastos from wcscmp description. [BZ #3515] * manual/string.texi (strtok): Remove duplicate paragraph. 2006-12-01 Jan Kratochvil <jan.kratochvil@redhat.com> * sysdeps/unix/sysv/linux/x86_64/sigaction.c: Fix compatibility with libgcc not supporting `rflags' unwinding (register # >= 17). 2006-11-30 Jakub Jelinek <jakub@redhat.com> * sunrpc/svc_run.c (svc_run): Set my_pollfd to new_pollfd if realloc succeeded. 2006-11-29 Daniel Jacobowitz <dan@codesourcery.com> Jakub Jelinek <jakub@redhat.com> Jan Kratochvil <jan.kratochvil@redhat.com> * sysdeps/unix/sysv/linux/x86_64/sigaction.c (restore_rt): Add correct unwind information. * sysdeps/unix/sysv/linux/x86_64/Makefile: Provide symbols for 'restore_rt' even in the 'signal' directory. * sysdeps/unix/sysv/linux/x86_64/ucontext_i.sym: Extend the regs list. malloc crashed. Don't allocate memory unnecessarily in each loop. 2006-10-21 Jakub Jelinek <jakub@redhat.com> * resolv/mapv4v6addr.h (map_v4v6_address): Fix last change. 2006-11-20 Ulrich Drepper <drepper@redhat.com> * resolv/mapv4v6addr.h (map_v4v6_address): Optimize a bit. 2006-11-18 Bruno Haible <bruno@clisp.org> * sysdeps/unix/sysv/linux/i386/getgroups.c (__getgroups): Invoke __sysconf only after having tried to call getgroups32. 2006-11-19 Ulrich Drepper <drepper@redhat.com> * nss/nss_files/files-hosts.c (LINE_PARSER): Support IPv6-style addresses for IPv4 queries if they can be mapped. 2006-11-16 Jakub Jelinek <jakub@redhat.com> * sysdeps/x86_64/fpu/s_copysignf.S (__copysignf): Switch to .text. * sysdeps/x86_64/fpu/s_copysign.S (__copysign): Likewise. (signmask): Add .size directive. (othermask): Add .type directive. 2006-11-14 Ulrich Drepper <drepper@redhat.com> * po/nl.po: Update from translation team. * timezone/zdump.c: Redo fix for BZ #3137. 2006-11-14 Jakub Jelinek <jakub@redhat.com> * nss/nss_files/files-alias.c (get_next_alias): Set line back to first_unused after parsing :include: file. * timezone/africa: Update from tzdata2006o. * timezone/antarctica: Likewise. * timezone/asia: Likewise. * timezone/australasia: Likewise. * timezone/backward: Likewise. * timezone/europe: Likewise. * timezone/iso3166.tab: Likewise. * timezone/northamerica: Likewise. * timezone/southamerica: Likewise. * timezone/zone.tab: Likewise. * time/tzfile.c (__tzfile_read): Extend to handle new file format on machines with 64-bit time_t. * timezone/checktab.awk: Update from tzcode2006o. * timezone/ialloc.c: Likewise. * timezone/private.h: Likewise. * timezone/scheck.c: Likewise. * timezone/tzfile.h: Likewise. * timezone/tzselect.ksh: Likewise. * timezone/zdump.c: Likewise. * timezone/zic.c: Likewise. [BZ #3483] * elf/ldconfig.c (main): Call setlocale and textdomain. Patch mostly by Benno Schulenberg <bensberg@justemail.net>. [BZ #3480] * manual/argp.texi: Fix typos. * manual/charset.texi: Likewise. * manual/errno.texi: Likewise. * manual/filesys.texi: Likewise. * manual/lang.texi: Likewise. * manual/maint.texi: Likewise. * manual/memory.texi: Likewise. * manual/message.texi: Likewise. * manual/resource.texi: Likewise. * manual/search.texi: Likewise. * manual/signal.texi: Likewise. * manual/startup.texi: Likewise. * manual/stdio.texi: Likewise. * manual/sysinfo.texi: Likewise. * manual/syslog.texi: Likewise. * manual/time.texi: Likewise. Patch by Ralf Wildenhues <Ralf.Wildenhues@gmx.de>. [BZ #3465] * sunrpc/clnt_raw.c: Minimal message improvements. * sunrpc/pm_getmaps.c: Likewise. * nis/nss_nisplus/nisplus-publickey.c: Likewise. * nis/nis_print_group_entry.c: Likewise. * locale/programs/repertoire.c: Likewise. * locale/programs/charmap.c: Likewise. * malloc/memusage.sh: Likewise. * elf/dl-deps.c: Likewise. * locale/programs/ld-collate.c: Likewise. * libio/vswprintf.c: Likewise. * malloc/memusagestat.c: Likewise. * sunrpc/auth_unix.c: Likewise. * sunrpc/rpc_main.c: Likewise. * nscd/cache.c: Likewise. * locale/programs/repertoire.c: Unify output messages. * locale/programs/charmap.c: Likewise. * locale/programs/ld-ctype.c: Likewise. * locale/programs/ld-monetary.c: Likewise. * locale/programs/ld-numeric.c: Likewise. * locale/programs/ld-time.c: Likewise. * elf/ldconfig.c: Likewise. * nscd/selinux.c: Likewise. * elf/cache.c: Likewise. Patch mostly by Benno Schulenberg <bensberg@justemail.net>. 2006-11-10 Jakub Jelinek <jakub@redhat.com> * string/strxfrm_l.c (STRXFRM): Fix trailing \1 optimization if N is one bigger than return value. * string/tst-strxfrm2.c (do_test): Also test strxfrm with l1 + 1 and l1 last arguments, if buf is defined, verify the return value equals to strlen (buf) and verify no byte beyond passed length is modified. 2006-11-10 Ulrich Drepper <drepper@redhat.com> * po/sv.po: Update from translation team. * sysdeps/gnu/siglist.c (__old_sys_siglist, __old_sys_sigabbrev): Use __new_sys_siglist instead of _sys_siglist_internal as second macro argument. (_old_sys_siglist): Use declare_symbol_alias macro instead of strong_alias. 2006-11-09 Ulrich Drepper <drepper@redhat.com> [BZ #3493] * posix/unistd.h (sysconf): Remove const attribute. * sysdeps/posix/getaddrinfo.c (getaddrinfo): Fix test for temporary or deprecated addresses. Patch by Sridhar Samudrala <sri@us.ibm.com>. * string/Makefile (tests): Add tst-strxfrm2. * string/tst-strxfrm2.c: New file. 2006-10-09 Jakub Jelinek <jakub@redhat.com> * elf/dl-debug.c (_dl_debug_initialize): Check r->r_map for 0 rather than r->r_brk. * string/strxfrm_l.c (STRXFRM): Do the trailing \1 removal optimization even if needed > n. 2006-11-07 Jakub Jelinek <jakub@redhat.com> * include/libc-symbols.h (declare_symbol): Rename to... (declare_symbol_alias): ... this. Add ORIGINAL argument, imply strong_alias (ORIGINAL, SYMBOL) in asm to make sure it preceedes .size directive. * sysdeps/gnu/errlist-compat.awk: Adjust for declare_symbol_alias changes. * sysdeps/gnu/siglist.c: Likewise. 2006-11-03 Steven Munroe <sjmunroe@us.ibm.com> * sysdeps/powerpc/fpu/bits/mathinline.h [__LIBC_INTERNAL_MATH_INLINES]: Moved to ... * sysdeps/powerpc/fpu/math_private.h: ...here. New file. 2006-11-05 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/i386/sysconf.c (intel_check_word): Update handling of cache descriptor 0x49 for new models. * sysdeps/unix/sysv/linux/x86_64/sysconf.c (intel_check_word): Likewise. 2006-11-02 Ulrich Drepper <drepper@redhat.com> * configure.in: Work around ld --help change and avoid -z relro test completely if the architecture doesn't care about security. 2006-11-01 Ulrich Drepper <drepper@redhat.com> * po/sv.po: Update from translation team. 2006-10-31 Ulrich Drepper <drepper@redhat.com> * stdlib/atexit.c (atexit): Don't mark as hidden when used to generate compatibility version. 2006-10-29 Ulrich Drepper <drepper@redhat.com> * configure.in: Relax -z relro requirement a bit. * po/sv.po: Update from translation team. 2006-10-29 Jakub Jelinek <jakub@redhat.com> * elf/dl-sym.c (do_sym): Use RTLD_SINGLE_THREAD_P. * elf/dl-runtime.c (_dl_fixup, _dl_profile_fixup): Likewise. * elf/dl-close.c (_dl_close_worker): Likewise. * elf/dl-open.c (_dl_open_worker): Likewise. * sysdeps/generic/sysdep-cancel.h (RTLD_SINGLE_THREAD_P): Define. * configure.in: Require assembler support for visibility, compiler support for visibility and aliases, linker support for various -z options. * Makeconfig: Remove conditional code which now is unnecessary. * config.h.in: Likewise. * config.make.in: Likewise. * dlfcn/Makefile: Likewise. * elf/Makefile: Likewise. * elf/dl-load.c: Likewise. * elf/rtld.c: Likewise. * include/libc-symbols.h: Likewise. * include/stdio.h: Likewise. * io/Makefile: Likewise. * io/fstat.c: Likewise. * io/fstat64.c: Likewise. * io/fstatat.c: Likewise. * io/fstatat64.c: Likewise. * io/lstat.c: Likewise. * io/lstat64.c: Likewise. * io/mknod.c: Likewise. * io/mknodat.c: Likewise. * io/stat.c: Likewise. * io/stat64.c: Likewise. * libio/stdio.c: Likewise. * nscd/Makefile: Likewise. * stdlib/Makefile: Likewise. * stdlib/atexit.c: Likewise. * sysdeps/generic/ldsodefs.h: Likewise. * sysdeps/i386/dl-machine.h: Likewise. * sysdeps/i386/sysdep.h: Likewise. * sysdeps/i386/i686/memcmp.S: Likewise. * sysdeps/powerpc/powerpc32/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/i386/sigaction.c: Likewise. * sysdeps/unix/sysv/linux/x86_64/sigaction.c: Likewise. * Makerules: USE_TLS support is now default. * tls.make.c: Likewise. * csu/Versions: Likewise. * csu/libc-start.c: Likewise. * csu/libc-tls.c: Likewise. * csu/version.c: Likewise. * dlfcn/dlinfo.c: Likewise. * elf/dl-addr.c: Likewise. * elf/dl-cache.c: Likewise. * elf/dl-close.c: Likewise. * elf/dl-iteratephdr.c: Likewise. * elf/dl-load.c: Likewise. * elf/dl-lookup.c: Likewise. * elf/dl-object.c: Likewise. * elf/dl-open.c: Likewise. * elf/dl-reloc.c: Likewise. * elf/dl-support.c: Likewise. * elf/dl-sym.c: Likewise. * elf/dl-sysdep.c: Likewise. * elf/dl-tls.c: Likewise. * elf/ldconfig.c: Likewise. * elf/rtld.c: Likewise. * elf/tst-tls-dlinfo.c: Likewise. * elf/tst-tls1.c: Likewise. * elf/tst-tls10.h: Likewise. * elf/tst-tls14.c: Likewise. * elf/tst-tls2.c: Likewise. * elf/tst-tls3.c: Likewise. * elf/tst-tls4.c: Likewise. * elf/tst-tls5.c: Likewise. * elf/tst-tls6.c: Likewise. * elf/tst-tls7.c: Likewise. * elf/tst-tls8.c: Likewise. * elf/tst-tls9.c: Likewise. * elf/tst-tlsmod1.c: Likewise. * elf/tst-tlsmod13.c: Likewise. * elf/tst-tlsmod13a.c: Likewise. * elf/tst-tlsmod14a.c: Likewise. * elf/tst-tlsmod2.c: Likewise. * elf/tst-tlsmod3.c: Likewise. * elf/tst-tlsmod4.c: Likewise. * elf/tst-tlsmod5.c: Likewise. * elf/tst-tlsmod6.c: Likewise. * include/errno.h: Likewise. * include/link.h: Likewise. * include/tls.h: Likewise. * locale/global-locale.c: Likewise. * locale/localeinfo.h: Likewise. * malloc/arena.c: Likewise. * malloc/hooks.c: Likewise. * malloc/malloc.c: Likewise. * resolv/Versions: Likewise. * sysdeps/alpha/dl-machine.h: Likewise. * sysdeps/alpha/libc-tls.c: Likewise. * sysdeps/generic/ldsodefs.h: Likewise. * sysdeps/generic/tls.h: Likewise. * sysdeps/i386/dl-machine.h: Likewise. * sysdeps/ia64/dl-machine.h: Likewise. * sysdeps/ia64/libc-tls.c: Likewise. * sysdeps/mach/hurd/fork.c: Likewise. * sysdeps/mach/hurd/i386/tls.h: Likewise. * sysdeps/powerpc/powerpc32/dl-machine.c: Likwise. * sysdeps/powerpc/powerpc32/dl-machine.h: Likewise. * sysdeps/powerpc/powerpc64/dl-machine.h: Likewise. * sysdeps/s390/libc-tls.c: Likewise. * sysdeps/s390/s390-32/dl-machine.h: Likewise. * sysdeps/s390/s390-64/dl-machine.h: Likewise. * sysdeps/sh/dl-machine.h: Likewise. * sysdeps/sparc/sparc32/dl-machine.h: Likewise. * sysdeps/sparc/sparc64/dl-machine.h: Likewise. * sysdeps/x86_64/dl-machine.h: Likewise. [BZ #3426] * stdlib/stdlib.h: Adjust comment for canonicalize_file_name to reality. 2006-10-27 Jakub Jelinek <jakub@redhat.com> * elf/dl-lookup.c (_dl_debug_bindings): Remove unused symbol_scope argument. (_dl_lookup_symbol_x): Adjust caller. * sysdeps/generic/ldsodefs.h (struct link_namespaces): Remove _ns_global_scope. * elf/rtld.c (dl_main): Don't initialize _ns_global_scope. * elf/dl-libc.c: Revert l_scope name changes. * elf/dl-load.c: Likewise. * elf/dl-object.c: Likewise. * elf/rtld.c: Likewise. * elf/dl-close.c (_dl_close): Likewise. * elf/dl-open.c (dl_open_worker): Likewise. If not SINGLE_THREAD_P, always use __rtld_mrlock_{change,done}. Always free old scope list here if not l_scope_mem. * elf/dl-runtime.c (_dl_fixup, _dl_profile_fixup): Revert l_scope name change. Never free scope list here. Just __rtld_mrlock_lock before the lookup and __rtld_mrlock_unlock it after the lookup. * elf/dl-sym.c: Likewise. * include/link.h (struct r_scoperec): Remove. (struct link_map): Replace l_scoperec with l_scope, l_scoperec_mem with l_scope_mem and l_scoperec_lock with l_scope_lock. 2006-10-25 Ulrich Drepper <drepper@redhat.com> * sysdeps/gnu/netinet/tcp.h: Define TCP_CONGESTION. 2006-10-18 Ulrich Drepper <drepper@redhat.com> * configure.in: Disable building profile libraries by default. 2006-10-18 Ulrich Drepper <drepper@redhat.com> * elf/dl-lookup.c (_dl_lookup_symbol_x): Add warning to _dl_lookup_symbol_x code. 2006-10-17 Jakub Jelinek <jakub@redhat.com> * elf/dl-runtime.c: Include sysdep-cancel.h. (_dl_fixup, _dl_profile_fixup): Use __rtld_mrlock_* and scoperec->nusers only if !SINGLE_THREAD_P. Use atomic_* instead of catomic_* macros. * elf/dl-sym.c: Include sysdep-cancel.h. (do_sym): Use __rtld_mrlock_* and scoperec->nusers only if !SINGLE_THREAD_P. Use atomic_* instead of catomic_* macros. * elf/dl-close.c: Include sysdep-cancel.h. (_dl_close): Use __rtld_mrlock_* and scoperec->nusers only if !SINGLE_THREAD_P. Use atomic_* instead of catomic_* macros. * elf/dl-open.c: Include sysdep-cancel.h. (dl_open_worker): Use __rtld_mrlock_* and scoperec->nusers only if !SINGLE_THREAD_P. Use atomic_* instead of catomic_* macros. 2006-10-17 Jakub Jelinek <jakub@redhat.com> [BZ #3313] * malloc/malloc.c (malloc_consolidate): Set maxfb to address of last fastbin rather than end of fastbin array. 2006-10-18 Ulrich Drepper <drepper@redhat.com> * sysdeps/i386/i486/bits/atomic.h (catomic_decrement): Use correct body macro. * sysdeps/x86_64/bits/atomic.h (__arch_c_compare_and_exchange_val_64_acq): Add missing casts. (catomic_decrement): Use correct body macro. 2006-10-17 Jakub Jelinek <jakub@redhat.com> * include/atomic.h: Add a unique prefix to all local variables in macros. * csu/tst-atomic.c (do_test): Test also catomic_* macros. 2006-10-14 Ulrich Drepper <drepper@redhat.com> * resolv/arpa/nameser.h: Document that ns_t_a6 is deprecated. [BZ #3313] * malloc/malloc.c (malloc_consolidate): Don't use get_fast_max to determine highest fast bin to consolidate, always look into all of them. (do_check_malloc_state): Only require for empty bins for large sizes in main arena. * libio/stdio.h: Add more __wur attributes. 2006-11-12 Andreas Jaeger <aj@suse.de> [BZ #2510] * manual/search.texi (Hash Search Function): Clarify. (Array Search Function): Clarify. 2006-11-12 Joseph Myers <joseph@codesourcery.com> [BZ #2830] * math/atest-exp.c (main): Cast hex value to mp_limb_t before shifting. * math/atest-exp2.c (read_mpn_hex): Likewise. * math/atest-sincos.c (main): Likewise. * sysdeps/unix/sysv/linux/syscalls.list: Add epoll_pwait. * sysdeps/unix/sysv/linux/sys/epoll.h: Declare epoll_pwait. * sysdeps/unix/sysv/linux/Versions (libc): Add epoll_pwait for version GLIBC_2.6. * Versions.def: Add GLIBC_2.6 for libc. * sysdeps/i386/i486/bits/atomic.h: Add catomic_* support. 2006-10-11 Jakub Jelinek <jakub@redhat.com> * malloc/malloc.c (_int_malloc): Remove unused any_larger variable. * nis/nis_defaults.c (__nis_default_access): Don't call getenv twice. * nis/nis_subr.c (nis_getnames): Use __secure_getenv instead of getenv. * sysdeps/generic/unsecvars.h: Add NIS_PATH. 2006-10-11 Ulrich Drepper <drepper@redhat.com> * include/atomic.c: Define catomic_* operations. * sysdeps/x86_64/bits/atomic.h: Likewise. Fix a few minor problems. * stdlib/cxa_finalize.c: Use catomic_* operations instead of atomic_*. * malloc/memusage.c: Likewise. * gmon/mcount.c: Likewise. * elf/dl-close.c: Likewise. * elf/dl-open.c: Likewise. * elf/dl-profile.c: Likewise. * elf/dl-sym.c: Likewise. * elf/dl-runtime.c: Likewise. * elf/dl-fptr.c: Likewise. * resolv/res_libc.c: Likewise. 2006-10-10 Roland McGrath <roland@frob.com> * sysdeps/mach/hurd/utimes.c: Use a union to avoid an improper cast. * sysdeps/mach/hurd/futimes.c: Likewise. * sysdeps/mach/hurd/lutimes.c: Likewise. 2006-10-09 Ulrich Drepper <drepper@redhat.com> Jakub Jelinek <jakub@redhat.com> Implement reference counting of scope records. * elf/dl-close.c (_dl_close): Remove all scopes from removed objects from the list in objects which remain. Always allocate new scope record. * elf/dl-open.c (dl_open_worker): When growing array for scopes, don't resize, allocate a new one. * elf/dl-runtime.c: Update reference counters before using a scope array. * elf/dl-sym.c: Likewise. * elf/dl-libc.c: Adjust for l_scope name change. * elf/dl-load.c: Likewise. * elf/dl-object.c: Likewise. * elf/rtld.c: Likewise. * include/link.h: Include <rtld-lowlevel.h>. Define struct r_scoperec. Replace r_scope with pointer to r_scoperec structure. Add l_scoperec_lock. * sysdeps/generic/ldsodefs.h: Include <rtld-lowlevel.h>. * sysdeps/generic/rtld-lowlevel.h: New file. * include/atomic.h: Rename atomic_and to atomic_and_val and atomic_or to atomic_or_val. Define new macros atomic_and and atomic_or which do not return values. * sysdeps/x86_64/bits/atomic.h: Define atomic_and and atomic_or. Various cleanups. * sysdeps/i386/i486/bits/atomic.h: Likewise. * po/sv.po: Update from translation team. 2006-10-07 Ulrich Drepper <drepper@redhat.com> * Versions.def: Add GLIBC_2.6 to libpthread. * include/shlib-compat.h (SHLIB_COMPAT): Expand parameters before use. (versioned_symbol): Likewise. (compat_symbol): Likewise. * po/tr.po: Update from translation team. * nis/Banner: Removed. It's been integral part forever and the author info is incomplete anyway. * libio/Banner: Likewise. 2006-10-06 Ulrich Drepper <drepper@redhat.com> * version.h (VERSION): Bump to 2.5.90 for new development tree.
2007-01-11 22:51:07 +01:00
file are not implemented on other platforms. Second, the @file{generic}
Update. 1997-10-15 06:56 Ulrich Drepper <drepper@cygnus.com> * Rules: Remove ruls to magically install <subdir>.h headers. Reported by Mark Kettenis <kettenis@phys.uva.nl>. * glibcbug.in: Fix @gnu.ai.mit.edu -> @gnu.org. * version.c: Likewise. * catgets/gencat.c: Likewise. * db2/makedb.c: Likewise. * locale/programs/locale.c: Likewise. * locale/programs/localedef.c: Likewise. * libc.map: Move _IO_list_all back to GLIBC_2.0. * elf/rtld.c: Provide name of running program to _dl_new_object. * Rules: Implement shared-only-sources. * include/libc-symbols.h: Define default_symbol_version. * libio/Makefile (shared-only-sources): Define. * libio/freopen.c: Define as default version. * libio/iofopen.c: Likewise. * libio/genops.c: Define _IO_list_all here. * libio/stdfiles.c: Create linked list with public names. * libio/oldstdfiles.c: Likewise. * stdio-common/printf.c: Optimize. * stdio-common/scanf.c: Optimize. * sysdeps/generic/setfpucw.c: Include #include <...> not "...". * sysdeps/i386/i486/bits/string.h: Add optimized versions of index and rindex. 1997-10-14 Andreas Jaeger <aj@arthur.rhein-neckar.de> * manual/arith.texi: Spelling fixes. * manual/conf.texi: Likewise. * manual/creature.texi: Likewise. * manual/filesys.texi: Likewise. * manual/intro.texi: Likewise. * manual/llio.texi: Likewise. * manual/math.texi: Likewise. * manual/message.texi: Likewise. * manual/pattern.texi: Likewise. * manual/search.texi: Likewise. * manual/signal.texi: Likewise. * manual/socket.texi: Likewise. * manual/startup.texi: Likewise. * manual/stdio.texi: Likewise. * manual/string.texi: Likewise. * manual/time.texi: Likewise. * manual/users.texi: Likewise. 1997-10-13 05:25 Ulrich Drepper <drepper@cygnus.com> * sysdeps/generic/sys/mman.h: Use __ptr_t instead of __caddr_t. * sysdeps/unix/bsd/osf/sys/mman.h: Likewise. * sysdeps/unix/bsd/sun/sunos4/sys/mman.h: Likewise. * sysdeps/unix/bsd/ultrix4/sys/mman.h: Likewise. * sysdeps/unix/sysv/irix4/sys/mman.h: Likewise. * sysdeps/unix/sysv/linux/sys/mman.h: Likewise. * sysdeps/mach/hurd/mmap.c: Likewise. * sysdeps/generic/mmap.c: Likewise. * sysdeps/unix/bsd/sun/sunos4/mmap.c: Likewise. * sysdeps/mach/munmap.c: Likewise. * sysdeps/generic/munmap.c: Likewise. * sysdeps/mach/mprotect.c: Likewise. * sysdeps/generic/mprotect.c: Likewise. * sysdeps/generic/msync.c: Likewise. * sysdeps/generic/madvise.c: Likewise. * sysdeps/unix/sysv/linux/madvise.c: Include stub version from generic subdir. 1997-10-12 20:27 Zack Weinberg <zack@rabi.phys.columbia.edu> * sysdeps/stub (all files): Moved to sysdeps/generic. * all files using stub_warning: Include <stub-tag.h>. * include/stub-tag.h: New file, marks stubs in .d files. * Makerules: Look for stub-tag.h, not sysdeps/stub, when building <gnu/stubs.h>. * configure.in: Don't add sysdeps/stub to $sysnames. * sysdeps/unix/Makefile: Look for generic headers, not stub headers. * sysdeps/generic/Makefile: Likewise. * manual/maint.texi: Delete references to sysdeps/stub. * INSTALL: Rebuilt. * configure: Rebuilt.
1997-10-15 07:34:02 +02:00
version of a system-dependent file is used if the makefiles do not find
a version specific to the system you're compiling for.
If it is possible to implement the routines in a @file{generic} file in
machine-independent C, using only other machine-independent functions in
the C library, then you should do so. Otherwise, make them stubs. A
@dfn{stub} function is a function which cannot be implemented on a
particular machine or operating system. Stub functions always return an
error, and set @code{errno} to @code{ENOSYS} (Function not implemented).
@xref{Error Reporting}. If you define a stub function, you must place
the statement @code{stub_warning(@var{function})}, where @var{function}
is the name of your function, after its definition; also, you must
include the file @code{<stub-tag.h>} into your file. This causes the
function to be listed in the installed @code{<gnu/stubs.h>}, and
makes GNU ld warn when the function is used.
Update. 1997-11-11 21:30 Ulrich Drepper <drepper@cygnus.com> * include/sys/stat.h: Define stat, fstat, lstat and *64 variants as macros so the the library compiles correctly even without optimization. * io/fstat.c: Undef fstat. * io/fstat64.c: Undef fstat64 * io/lstat.c: Undef lstat. * io/lstat64.c: Undef lstat64 * io/stat.c: Undef stat. * io/stat64.c: Undef stat64 * io/fts.c: Include <include/sys/stat.h> to get macro definitions. * io/ftw.c: Likewise. * io/getdirname.c: Likewise. * Makefile (install): Run test-installation.pl if possible. * db2/Makefile: Update from db-2.3.12. * db2/db.h: Likewise. * db2/db_int.h: Likewise. * db2/btree/bt_cursor.c: Likewise. * db2/btree/bt_delete.c: Likewise. * db2/btree/bt_open.c: Likewise. * db2/btree/bt_put.c: Likewise. * db2/btree/bt_rec.c: Likewise. * db2/btree/bt_recno.c: Likewise. * db2/btree/bt_search.c: Likewise. * db2/btree/bt_split.c: Likewise. * db2/btree/bt_stat.c: Likewise. * db2/btree/btree.src: Likewise. * db2/btree/btree_auto.c: Likewise. * db2/btree/bt_cursor.c: Likewise. * db2/btree/bt_delete.c: Likewise. * db2/btree/bt_open.c: Likewise. * db2/btree/bt_put.c: Likewise. * db2/btree/bt_rec.c: Likewise. * db2/btree/bt_recno.c: Likewise. * db2/btree/bt_search.c: Likewise. * db2/btree/bt_split.c: Likewise. * db2/btree/bt_stat.c: Likewise. * db2/btree/btree.src: Likewise. * db2/btree/btree_auto.c: Likewise. * db2/common/db_appinit.c: Likewise. * db2/common/db_apprec.c: Likewise. * db2/common/db_byteorder.c: Likewise. * db2/common/db_region.c: Likewise. * db2/db/db.c: Likewise * db2/db/db.src: Likewise * db2/db/db_auto.c: Likewise * db2/db/db_dispatch.c: Likewise * db2/db/db_dup.c: Likewise * db2/db/db_overflow.c: Likewise * db2/db/db_pr.c: Likewise * db2/db/db_rec.c: Likewise * db2/db/db_ret.c: Likewise * db2/db/db_thread.c: Likewise * db2/db185/db185.c: Likewise. * db2/hash/hash.c: Likewise. * db2/hash/hash.src: Likewise. * db2/hash/hash_auto.c: Likewise. * db2/hash/hash_dup.c: Likewise. * db2/hash/hash_page.c: Likewise. * db2/hash/hash_rec.c: Likewise. * db2/include/btree_auto.h: Likewise. * db2/include/btree_ext.h: Likewise. * db2/include/clib_ext.h: Likewise. * db2/include/common_ext.h: Likewise. * db2/include/db.h.src: Likewise. * db2/include/db_am.h: Likewise. * db2/include/db_auto.h: Likewise. * db2/include/db_cxx.h: Likewise. * db2/include/db_ext.h: Likewise. * db2/include/db_int.h.src: Likewise. * db2/include/hash.h: Likewise. * db2/include/hash_auto.h: Likewise. * db2/include/hash_ext.h: Likewise. * db2/include/lock.h: Likewise. * db2/include/lock_ext.h: Likewise. * db2/include/log.h: Likewise. * db2/include/log_ext.h: Likewise. * db2/include/mp.h: Likewise. * db2/include/mp_ext.h: Likewise. * db2/include/mutex_ext.h: Likewise. * db2/include/os_ext.h: Likewise. * db2/include/os_func.h: Likewise. * db2/include/txn.h: Likewise. * db2/include/txn_ext.h: Likewise. * db2/lock/lock.c: Likewise. * db2/lock/lock_deadlock.c: Likewise. * db2/log/log.c: Likewise. * db2/log/log_archive.c: Likewise. * db2/log/log_auto.c: Likewise. * db2/log/log_findckp.c: Likewise. * db2/log/log_get.c: Likewise. * db2/log/log_put.c: Likewise. * db2/log/log_rec.c: Likewise. * db2/log/log_register.c: Likewise. * db2/mp/mp_bh.c: Likewise. * db2/mp/mp_fget.c: Likewise. * db2/mp/mp_fopen.c: Likewise. * db2/mp/mp_fput.c: Likewise. * db2/mp/mp_fset.c: Likewise. * db2/mp/mp_open.c: Likewise. * db2/mp/mp_pr.c: Likewise. * db2/mp/mp_region.c: Likewise. * db2/mp/mp_sync.c: Likewise. * db2/mutex/mutex.c: Likewise. * db2/os/os_abs.c: Likewise. * db2/os/os_dir.c: Likewise. * db2/os/os_fid.c: Likewise. * db2/os/os_fsync.c: Likewise. * db2/os/os_func.c: Likewise. * db2/os/os_map.c: Likewise. * db2/os/os_oflags.c: Likewise. * db2/os/os_open.c: Likewise. * db2/os/os_rpath.c: Likewise. * db2/os/os_rw.c: Likewise. * db2/os/os_seek.c: Likewise. * db2/os/os_sleep.c: Likewise. * db2/os/os_stat.c: Likewise. * db2/os/os_unlink.c: Likewise. * db2/progs/db_deadlock/db_deadlock.c: Likewise. * db2/progs/db_dump/db_dump.c: Likewise. * db2/progs/db_load/db_load.c: Likewise. * db2/progs/db_recover/db_recover.c: Likewise. * db2/progs/db_stat/db_stat.c: Likewise. * db2/txn/txn.c: Likewise. * db2/txn/txn_auto.c: Likewise. * db2/txn/txn_rec.c: Likewise. * db2/os/db_os_abs.c: Removed. * db2/os/db_os_dir.c: Removed. * db2/os/db_os_fid.c: Removed. * db2/os/db_os_lseek.c: Removed. * db2/os/db_os_mmap.c: Removed. * db2/os/db_os_open.c: Removed. * db2/os/db_os_rw.c: Removed. * db2/os/db_os_sleep.c: Removed. * db2/os/db_os_stat.c: Removed. * db2/os/db_os_unlink.c: Removed. * libio/stdio.h (fopen): Add __restrict to parameters. * manual/process.texi (system): Describe behaviour for NULL argument. * stdio-common/printf-parse.h: Parse hh modifier. * stdio-common/vfprintf.c: Handle hh modifier. * stdio-common/vfscanf.c: Likewise. * manual/stdio.texi: Describe hh modifier for scanf/printf. * math/complex.h: Don't define _Imaginary_I, but instead _Complex_I. gcc does no yet know the `imaginary' keyword. * math/test-math.c: Add little test for know gcc bug. * math/tgmath.h: Make complex versions of log10() only available if __USE_GNU. * stdlib/test-canon.c: Fix typo. * sysdeps/generic/setenv.c: Avoid compilation warnings. Reported by Jim Meyering. * sysdeps/generic/bits/errno.h: EILSEQ is an ISO C error number. * sysdeps/mach/hurd/bits/errno.h: Likewise. * sysdeps/standalone/bits/errno.h: Likewise. * sysdeps/unix/sysv/linux/bits/errno.h: Likewise. * sysdeps/i386/i586/memcpy.S: New file. * sysdeps/i386/i586/mempcpy.S: New file. * sysdeps/i386/i586/memset.S: Fix typo. * sysdeps/posix/getcwd.c: Define HAVE_MEMPCPY for _LIBC. Add casts. * sysdeps/posix/system.c: Add comment to explain code. * sysdeps/wordsize-32/inttypes.h: Include <stddef.h> for wchar_t. Define PTRDIFF_{MIN,MAX}, SIG_ATOMIC_{MIN,MAX}, SIZE_MAX, WCHAR_{MIN,MAX}, WINT_{MIN,MAX}. Define wcstoimax, wcstoumax. * sysdeps/wordsize-64/inttypes.h: Likewise. * wcsmbs/wchar.h: Define WCHAR_{MIN,MAX} if not already defined. Declare __wcsto{l,ul,ll,ull}_internal only if not already done. * time/Makefile (routines): Add strfxtime. * time/strftime.c: Implement %F and %f format. * time/strfxtime.c: New file. * time/time.h: Define new types and symbols from ISO C 9X. * time/mktime.c: Little comment correction. 1997-11-10 Andreas Jaeger <aj@arthur.rhein-neckar.de> * sysdeps/libm-ieee754/s_sincosl.c: Fix typo. * sysdeps/libm-ieee754/s_tanl.c: Fix typo. * sysdeps/libm-ieee754/s_floorl.c: Correct typos. * sysdeps/libm-ieee754/e_remainderl.c: Replace EXTRACT_LDOUBLE_WORDS by GET_LDOUBLE_WORDS. * sysdeps/libm-ieee754/e_atan2l.c: Replace EXTRACT_LDOUBLE_WORDS by GET_LDOUBLE_WORDS. * sysdeps/libm-ieee754/s_scalbnl.c: Replace ";" by "," for correct variable declaration. * sysdeps/libm-ieee754/s_scalblnl.c: Likewise. * sysdeps/libm-ieee754/s_lrint.c (__lrint): Correct function. * math/libm-test.c (sqrt_test): Add test for sqrt (0.25). (asin_test): Add more test. 1997-11-10 23:34 Ulrich Drepper <drepper@cygnus.com> * sysdeps/libm-ieee754/e_asin.c: Add braces to make code clearer and to not confuse the poor compiler. * sysdeps/libm-ieee754/e_asinf.c: Likewise. Reported by vertex@cagent.com. 1997-11-09 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * elf/dl-lookup.c (do_lookup): Don't accept the base version if we require a specific one. * libio/oldfreopen.c: Bind old symbols to version GLIBC_2.0. * libio/oldiofopen.c: Likewise. * libio/oldstdfiles.c: Likewise. * libc.map: Export them. 1997-11-10 07:40 H.J. Lu <hjl@gnu.ai.mit.edu> * stdlib/exit.c (exit): Handle recursive calls to exit (). 1997-11-09 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/fpu/s_llrint.c: Fixed to take double argument instead of long double. * sysdeps/m68k/fpu/s_llrintf.c: New file. * sysdeps/m68k/fpu/s_llrintl.c: New file. * sysdeps/libm-ieee754/s_llrint.c: Make compilable and fix overflow condition. * sysdeps/libm-ieee754/s_llrintf.c: Fix overflow condition. * sysdeps/libm-ieee754/s_llrintl.c: Likewise. * sysdeps/libm-ieee754/s_llround.c: Likewise. * sysdeps/libm-ieee754/s_llroundf.c: Likewise. * sysdeps/libm-ieee754/s_llroundl.c: Likewise. * sysdeps/libm-ieee754/s_lrint.c: Likewise. * sysdeps/libm-ieee754/s_lrintf.c: Likewise. * sysdeps/libm-ieee754/s_lrintl.c: Likewise. * sysdeps/libm-ieee754/s_lround.c: Likewise. * sysdeps/libm-ieee754/s_lroundf.c: Likewise. * sysdeps/libm-ieee754/s_lroundl.c: Likewise. * math/libm-test.c: Test all three variants of lrint and llrint. Fix typos in lround and llround tests. Add tests for boundary cases for lrint and llround. 1997-11-08 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * manual/arith.texi: Misc doc fixes. * manual/ctype.texi: Likewise. * manual/pattern.texi: Likewise. * manual/terminal.texi: Likewise. 1997-11-08 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/xstatconv.c: Use struct assignment instead of memcpy to let the compiler use whatever it regards as optimal. * sysdeps/unix/sysv/linux/alpha/xstatconv.c: Likewise. 1997-11-08 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/sysv/linux/Makefile (sysdep_headers) [$(subdir)=misc]: Add sys/prctl.h. * sysdeps/unix/sysv/linux/Dist: Distribute it. 1997-11-08 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * io/ftwtest-sh: Don't use the unknown which command, instead try pwd as /bin/pwd and /usr/bin/pwd. 1997-11-08 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * manual/maint.texi (Tools for Installation): Don't recommend broken version 3.76.1 of make. (Porting): Fix wording. 1997-11-06 06:13 H.J. Lu <hjl@gnu.ai.mit.edu> * config.make.in (build-pic-default): New, defined with pic_default. * configure.in (pic_default): New, set to yes if PIC is default. * Makeconfig (CPPFLAGS-.o, CPPFLAGS-.op, CPPFLAGS-.og, CPPFLAGS-.ob): Add -DPIC if $(build-pic-default) is yes. 1997-11-09 18:15 Ulrich Drepper <drepper@cygnus.com> * Makerules (libc.so): Fix typo. * csu/Makefile (CFLAGS-initfini.s): Correctly fix moving function definition. Patch by Zack Weinberg <zack@rabi.phys.columbia.edu>. * stdlib/strtod.c: Handle numbers like 0.0e10000 correctly which produce 0.0. Reported by Joe Keane <jgk@jgk.org>. * sysdeps/libm-ieee754/s_ceill.c: Fix typos. * sysdeps/libm-ieee754/s_llrint.c: Correct code, it never worked. 1997-11-06 07:00 H.J. Lu <hjl@gnu.ai.mit.edu> * sysdeps/unix/sysv/i386/i686/time.S: Removed. 1997-11-08 14:07 Thorsten Kukuk <kukuk@vt.uni-paderborn.de> * nis/libnsl.map: Add __do_niscall2 for nis_cachemgr. * nis/nis_call.c: Set UDP resend timeout correct. * nis/nss_compat/compat-grp.c: Rewritten to make it faster. * nis/nss_compat/compat-pwd.c: Likewise. * nis/nss_compat/compat-spwd.c: Likewise. * nis/ypclnt.c: Fix UDP resend timeout, fix yp_bind/do_ypcall interaction. * inet/protocols/routed.h: Include sys/socket.h. * inet/protocols/talkd.h: Likewise. * inet/protocols/timed.h: Include rpc/types.h. * sunrpc/rpc/pmap_clnt.h: Include rpc/clnt.h. 1997-11-06 01:39 Ulrich Drepper <drepper@cygnus.com> * Makerules (libc.so): Add missing closing brace. 1997-11-05 Brendan Kehoe <brendan@lisa.cygnus.com> * libio.h (__P): Name its arg `p' instead of `params'. This was added solely to work around problems with the definition of __P in the Solaris math.h header.
1997-11-12 01:06:02 +01:00
Some rare functions are only useful on specific systems and aren't
defined at all on others; these do not appear anywhere in the
system-independent source code or makefiles (including the
@file{generic} directory), only in the system-dependent @file{Makefile}
in the specific system's subdirectory.
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If you come across a file that is in one of the main source directories
(@file{string}, @file{stdio}, etc.), and you want to write a machine- or
operating system-dependent version of it, move the file into
@file{sysdeps/generic} and write your new implementation in the
appropriate system-specific subdirectory. Note that if a file is to be
system-dependent, it @strong{must not} appear in one of the main source
directories.@refill
There are a few special files that may exist in each subdirectory of
@file{sysdeps}:
@comment Blank lines after items make the table look better.
@table @file
@item Makefile
A makefile for this machine or operating system, or class of machine or
operating system. This file is included by the library makefile
@file{Makerules}, which is used by the top-level makefile and the
subdirectory makefiles. It can change the variables set in the
including makefile or add new rules. It can use GNU @code{make}
conditional directives based on the variable @samp{subdir} (see above) to
select different sets of variables and rules for different sections of
the library. It can also set the @code{make} variable
@samp{sysdep-routines}, to specify extra modules to be included in the
library. You should use @samp{sysdep-routines} rather than adding
modules to @samp{routines} because the latter is used in determining
what to distribute for each subdirectory of the main source tree.@refill
Each makefile in a subdirectory in the ordered list of subdirectories to
be searched is included in order. Since several system-dependent
makefiles may be included, each should append to @samp{sysdep-routines}
rather than simply setting it:
@smallexample
sysdep-routines := $(sysdep-routines) foo bar
@end smallexample
@need 1000
@item Subdirs
This file contains the names of new whole subdirectories under the
top-level library source tree that should be included for this system.
These subdirectories are treated just like the system-independent
subdirectories in the library source tree, such as @file{stdio} and
@file{math}.
Use this when there are completely new sets of functions and header
files that should go into the library for the system this subdirectory
of @file{sysdeps} implements. For example,
@file{sysdeps/unix/inet/Subdirs} contains @file{inet}; the @file{inet}
directory contains various network-oriented operations which only make
sense to put in the library on systems that support the Internet.@refill
@item configure
This file is a shell script fragment to be run at configuration time.
The top-level @file{configure} script uses the shell @code{.} command to
read the @file{configure} file in each system-dependent directory
chosen, in order. The @file{configure} files are often generated from
@file{configure.in} files using Autoconf.
A system-dependent @file{configure} script will usually add things to
the shell variables @samp{DEFS} and @samp{config_vars}; see the
top-level @file{configure} script for details. The script can check for
@w{@samp{--with-@var{package}}} options that were passed to the
top-level @file{configure}. For an option
@w{@samp{--with-@var{package}=@var{value}}} @file{configure} sets the
shell variable @w{@samp{with_@var{package}}} (with any dashes in
@var{package} converted to underscores) to @var{value}; if the option is
just @w{@samp{--with-@var{package}}} (no argument), then it sets
@w{@samp{with_@var{package}}} to @samp{yes}.
@item configure.in
This file is an Autoconf input fragment to be processed into the file
@file{configure} in this subdirectory. @xref{Introduction,,,
autoconf.info, Autoconf: Generating Automatic Configuration Scripts},
for a description of Autoconf. You should write either @file{configure}
or @file{configure.in}, but not both. The first line of
@file{configure.in} should invoke the @code{m4} macro
@samp{GLIBC_PROVIDES}. This macro does several @code{AC_PROVIDE} calls
for Autoconf macros which are used by the top-level @file{configure}
script; without this, those macros might be invoked again unnecessarily
by Autoconf.
@end table
That is the general system for how system-dependencies are isolated.
@iftex
The next section explains how to decide what directories in
@file{sysdeps} to use. @ref{Porting to Unix}, has some tips on porting
the library to Unix variants.
@end iftex
@menu
* Hierarchy Conventions:: The layout of the @file{sysdeps} hierarchy.
* Porting to Unix:: Porting the library to an average
Unix-like system.
@end menu
@node Hierarchy Conventions
@appendixsubsec Layout of the @file{sysdeps} Directory Hierarchy
A GNU configuration name has three parts: the CPU type, the
manufacturer's name, and the operating system. @file{configure} uses
these to pick the list of system-dependent directories to look for. If
the @samp{--nfp} option is @emph{not} passed to @file{configure}, the
directory @file{@var{machine}/fpu} is also used. The operating system
often has a @dfn{base operating system}; for example, if the operating
system is @samp{Linux}, the base operating system is @samp{unix/sysv}.
1995-02-18 02:27:10 +01:00
The algorithm used to pick the list of directories is simple:
@file{configure} makes a list of the base operating system,
manufacturer, CPU type, and operating system, in that order. It then
concatenates all these together with slashes in between, to produce a
directory name; for example, the configuration @w{@samp{i686-linux-gnu}}
results in @file{unix/sysv/linux/i386/i686}. @file{configure} then
1995-02-18 02:27:10 +01:00
tries removing each element of the list in turn, so
@file{unix/sysv/linux} and @file{unix/sysv} are also tried, among others.
1995-02-18 02:27:10 +01:00
Since the precise version number of the operating system is often not
important, and it would be very inconvenient, for example, to have
identical @file{irix6.2} and @file{irix6.3} directories,
1995-02-18 02:27:10 +01:00
@file{configure} tries successively less specific operating system names
by removing trailing suffixes starting with a period.
As an example, here is the complete list of directories that would be
tried for the configuration @w{@samp{i686-linux-gnu}} (with the
@file{crypt} and @file{linuxthreads} add-on):
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@smallexample
sysdeps/i386/elf
crypt/sysdeps/unix
linuxthreads/sysdeps/unix/sysv/linux
linuxthreads/sysdeps/pthread
linuxthreads/sysdeps/unix/sysv
linuxthreads/sysdeps/unix
linuxthreads/sysdeps/i386/i686
linuxthreads/sysdeps/i386
linuxthreads/sysdeps/pthread/no-cmpxchg
sysdeps/unix/sysv/linux/i386
sysdeps/unix/sysv/linux
sysdeps/gnu
sysdeps/unix/common
sysdeps/unix/mman
sysdeps/unix/inet
sysdeps/unix/sysv/i386/i686
sysdeps/unix/sysv/i386
sysdeps/unix/sysv
sysdeps/unix/i386
sysdeps/unix
sysdeps/posix
sysdeps/i386/i686
sysdeps/i386/i486
sysdeps/libm-i387/i686
sysdeps/i386/fpu
sysdeps/libm-i387
sysdeps/i386
sysdeps/wordsize-32
sysdeps/ieee754
sysdeps/libm-ieee754
sysdeps/generic
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@end smallexample
Different machine architectures are conventionally subdirectories at the
top level of the @file{sysdeps} directory tree. For example,
@w{@file{sysdeps/sparc}} and @w{@file{sysdeps/m68k}}. These contain
files specific to those machine architectures, but not specific to any
particular operating system. There might be subdirectories for
specializations of those architectures, such as
@w{@file{sysdeps/m68k/68020}}. Code which is specific to the
floating-point coprocessor used with a particular machine should go in
@w{@file{sysdeps/@var{machine}/fpu}}.
There are a few directories at the top level of the @file{sysdeps}
hierarchy that are not for particular machine architectures.
@table @file
@item generic
Update. 1997-10-15 06:56 Ulrich Drepper <drepper@cygnus.com> * Rules: Remove ruls to magically install <subdir>.h headers. Reported by Mark Kettenis <kettenis@phys.uva.nl>. * glibcbug.in: Fix @gnu.ai.mit.edu -> @gnu.org. * version.c: Likewise. * catgets/gencat.c: Likewise. * db2/makedb.c: Likewise. * locale/programs/locale.c: Likewise. * locale/programs/localedef.c: Likewise. * libc.map: Move _IO_list_all back to GLIBC_2.0. * elf/rtld.c: Provide name of running program to _dl_new_object. * Rules: Implement shared-only-sources. * include/libc-symbols.h: Define default_symbol_version. * libio/Makefile (shared-only-sources): Define. * libio/freopen.c: Define as default version. * libio/iofopen.c: Likewise. * libio/genops.c: Define _IO_list_all here. * libio/stdfiles.c: Create linked list with public names. * libio/oldstdfiles.c: Likewise. * stdio-common/printf.c: Optimize. * stdio-common/scanf.c: Optimize. * sysdeps/generic/setfpucw.c: Include #include <...> not "...". * sysdeps/i386/i486/bits/string.h: Add optimized versions of index and rindex. 1997-10-14 Andreas Jaeger <aj@arthur.rhein-neckar.de> * manual/arith.texi: Spelling fixes. * manual/conf.texi: Likewise. * manual/creature.texi: Likewise. * manual/filesys.texi: Likewise. * manual/intro.texi: Likewise. * manual/llio.texi: Likewise. * manual/math.texi: Likewise. * manual/message.texi: Likewise. * manual/pattern.texi: Likewise. * manual/search.texi: Likewise. * manual/signal.texi: Likewise. * manual/socket.texi: Likewise. * manual/startup.texi: Likewise. * manual/stdio.texi: Likewise. * manual/string.texi: Likewise. * manual/time.texi: Likewise. * manual/users.texi: Likewise. 1997-10-13 05:25 Ulrich Drepper <drepper@cygnus.com> * sysdeps/generic/sys/mman.h: Use __ptr_t instead of __caddr_t. * sysdeps/unix/bsd/osf/sys/mman.h: Likewise. * sysdeps/unix/bsd/sun/sunos4/sys/mman.h: Likewise. * sysdeps/unix/bsd/ultrix4/sys/mman.h: Likewise. * sysdeps/unix/sysv/irix4/sys/mman.h: Likewise. * sysdeps/unix/sysv/linux/sys/mman.h: Likewise. * sysdeps/mach/hurd/mmap.c: Likewise. * sysdeps/generic/mmap.c: Likewise. * sysdeps/unix/bsd/sun/sunos4/mmap.c: Likewise. * sysdeps/mach/munmap.c: Likewise. * sysdeps/generic/munmap.c: Likewise. * sysdeps/mach/mprotect.c: Likewise. * sysdeps/generic/mprotect.c: Likewise. * sysdeps/generic/msync.c: Likewise. * sysdeps/generic/madvise.c: Likewise. * sysdeps/unix/sysv/linux/madvise.c: Include stub version from generic subdir. 1997-10-12 20:27 Zack Weinberg <zack@rabi.phys.columbia.edu> * sysdeps/stub (all files): Moved to sysdeps/generic. * all files using stub_warning: Include <stub-tag.h>. * include/stub-tag.h: New file, marks stubs in .d files. * Makerules: Look for stub-tag.h, not sysdeps/stub, when building <gnu/stubs.h>. * configure.in: Don't add sysdeps/stub to $sysnames. * sysdeps/unix/Makefile: Look for generic headers, not stub headers. * sysdeps/generic/Makefile: Likewise. * manual/maint.texi: Delete references to sysdeps/stub. * INSTALL: Rebuilt. * configure: Rebuilt.
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As described above (@pxref{Porting}), this is the subdirectory
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that every configuration implicitly uses after all others.
@item ieee754
This directory is for code using the IEEE 754 floating-point format,
where the C type @code{float} is IEEE 754 single-precision format, and
@code{double} is IEEE 754 double-precision format. Usually this
directory is referred to in the @file{Implies} file in a machine
architecture-specific directory, such as @file{m68k/Implies}.
@item libm-ieee754
This directory contains an implementation of a mathematical library
usable on platforms which use @w{IEEE 754} conformant floating-point
arithmetic.
@item libm-i387
This is a special case. Ideally the code should be in
@file{sysdeps/i386/fpu} but for various reasons it is kept aside.
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@item posix
This directory contains implementations of things in the library in
terms of @sc{POSIX.1} functions. This includes some of the @sc{POSIX.1}
functions themselves. Of course, @sc{POSIX.1} cannot be completely
implemented in terms of itself, so a configuration using just
@file{posix} cannot be complete.
@item unix
This is the directory for Unix-like things. @xref{Porting to Unix}.
@file{unix} implies @file{posix}. There are some special-purpose
subdirectories of @file{unix}:
@table @file
@item unix/common
This directory is for things common to both BSD and System V release 4.
Both @file{unix/bsd} and @file{unix/sysv/sysv4} imply @file{unix/common}.
@item unix/inet
This directory is for @code{socket} and related functions on Unix systems.
@file{unix/inet/Subdirs} enables the @file{inet} top-level subdirectory.
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@file{unix/common} implies @file{unix/inet}.
@end table
@item mach
This is the directory for things based on the Mach microkernel from CMU
(including the GNU operating system). Other basic operating systems
(VMS, for example) would have their own directories at the top level of
the @file{sysdeps} hierarchy, parallel to @file{unix} and @file{mach}.
@end table
@node Porting to Unix
@appendixsubsec Porting the GNU C Library to Unix Systems
Most Unix systems are fundamentally very similar. There are variations
between different machines, and variations in what facilities are
provided by the kernel. But the interface to the operating system
facilities is, for the most part, pretty uniform and simple.
The code for Unix systems is in the directory @file{unix}, at the top
level of the @file{sysdeps} hierarchy. This directory contains
subdirectories (and subdirectory trees) for various Unix variants.
The functions which are system calls in most Unix systems are
Update. 1997-09-05 03:15 Ulrich Drepper <drepper@cygnus.com> * Makefile (subdirs): Reorganize order so that nss follows add-ons. * config.make.in (LDAP): Add. * configure.in: Prepare for ldap add-on. * shlib-versions: Add version numbers for ldap NSS module. * nss/Makefile: Add rules to build ldap NSS module. * db/btree/bt_page.c (__bt_free): Update meta data information. Update db from db-2.3.6. * db2/db.h: Updated. * db2/btree/bt_close.c: Updated. * db2/btree/bt_compare.c: Updated. * db2/btree/bt_conv.c: Updated. * db2/btree/bt_cursor.c: Updated. * db2/btree/bt_delete.c: Updated. * db2/btree/bt_put.c: Updated. * db2/btree/bt_rec.c: Updated. * db2/btree/bt_recno.c: Updated. * db2/btree/bt_search.c: Updated. * db2/btree/bt_split.c: Updated. * db2/btree/bt_stat.c: Updated. * db2/common/db_appinit.c: Updated. * db2/common/db_apprec.c: Updated. * db2/common/db_byteorder.c: Updated. * db2/common/db_err.c: Updated. * db2/common/db_region.c: Updated. * db2/db/db.c: Updated. * db2/db/db_conv.c: Updated. * db2/db/db_dup.c: Updated. * db2/db/db_pr.c: Updated. * db2/db/db_ret.c: Updated. * db2/db185/db185.c: Updated. * db2/dbm/dbm.c: Updated. * db2/hash/hash_dup.c: Updated. * db2/include/db_am.h: Updated. * db2/include/db_page.h: Updated. * db2/include/mp.h: Updated. * db2/include/queue.h: Updated. * db2/log/log.c: Updated. * db2/log/log_findckp.c: Updated. * db2/log/log_get.c: Updated. * db2/log/log_rec.c: Updated. * db2/mp/mp_bh.c: Updated. * db2/mp/mp_fopen.c: Updated. * db2/mp/mp_pr.c: Updated. * db2/mp/mp_sync.c: Updated. * db2/mutex/x86.gcc: Updated. * db2/os/db_os_dir.c: Updated. * db2/os/db_os_fid.c: Updated. * db2/progs/db_archive/db_archive.c: Updated. * db2/progs/db_checkpoint/db_checkpoint.c: Updated. * db2/progs/db_deadlock/db_deadlock.c: Updated. * db2/progs/db_dump/db_dump.c: Updated. * db2/progs/db_dump185/db_dump185.c: Updated. * db2/progs/db_load/db_load.c: Updated. * db2/progs/db_printlog/db_printlog.c: Updated. * db2/progs/db_recover/db_recover.c: Updated. * db2/progs/db_stat/db_stat.c: Updated. * db2/txn/txn.c: Updated. * db2/txn/txn_rec.c: Updated. * db2/Makefile: Add rule to build db_printlog. * db2/config.h: Don't include endian.h and don't define WORDS_BIGENDIAN. Only define HAVE_ENDIAN_H. * elf/dl-open.c (_dl_open): Make thread-safe. * elf/dl-close.c (_dl_close): Likewise. * elf/dlclose.c: Pretty print. * elf/dl-version.c (make_string): Use __strdup not strdup. (find_needed): Don't use l_searchlist of _dl_loaded, use the l_next list. * elf/dl-deps.c (_dl_map_object_deps): Remove variable head. * manual/math.texi: Add note about == and != for FP values. * manual/message.texi: Mention problems with relative paths and binstextdomain. * manual/string.texi: Mark strdupa and strndupa correctly as macros. * sunrpc/Makefile (CFLAGS-xkey_prot.c): Define to prevent warnings. * sunrpc/rpc_cout.c: Avoid needless races around return value. * sysdeps/generic/stpcpy.c: Include <config.h> if wanted. Update from tzdata-1997h. * time/africa: Updated. * time/europe: Updated. * time/iso3166.tab: Updated. * time/northamerica: Updated. * time/southamerica: Updated. * time/zone.tab: Updated. 1997-09-04 13:19 Richard Henderson <rth@cygnus.com> * sysdeps/alpha/w_sqrt.S: Removed. * sysdeps/alpha/fpu/e_sqrt.c: New. Obey -mieee and -mieee-with-inexact and build a version that is as fast as possible given the constraint. 1997-08-30 Andreas Jaeger <aj@arthur.rhein-neckar.de> * manual/maint.texi: Document some defaults for configuration parameters. 1997-09-04 15:57 Ulrich Drepper <drepper@cygnus.com> * termios/cfsetspeed.c (cfsetspeed): Change return value to int. * termios/termios.h: Change prototype accordingly. Reported by Andreas Jaeger <aj@arthur.rhein-neckar.de>. 1997-07-26 14:42 H.J. Lu <hjl@gnu.ai.mit.edu> * libio/stdfiles.c (_libio_using_thunks): Define if _G_USING_THUNKS is defined. * libio/_G_config.h: Moved to ... * sysdeps/generic/_G_config.h: ...here. * sysdeps/unix/sysv/linux/_G_config.h: New, Add vtable thunks support. 1997-09-02 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/Makefile (pic-ccflag): Override it for more efficient code (together with a change in gcc). * Makeconfig (pic-ccflag): New variable. (CFLAGS-.os): Use it instead of hardcoding -fPIC. 1997-09-02 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/dl-machine.h (elf_machine_load_address): Use _dl_start instead of a local label, to avoid getting an unreadable label name. 1997-09-02 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * nss/Makefile ($(objpfx)libnss_db.so): Use $(dbobjdir) to find libdb.so. * Makeconfig (dbobjdir): Use db2. 1997-08-31 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * manual/maint.texi (Porting to Unix): Update description of the implementation of Unix system calls. (Contributors): Use real umlaut in tege's name. 1997-08-30 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/libm-ieee754/w_gamma.c: Make compilable with _IEEE_LIBM. * sysdeps/libm-ieee754/w_gammaf.c: Likewise. * sysdeps/libm-ieee754/w_gammal.c: Likewise.
1997-09-05 03:43:20 +02:00
implemented in assembly code, which is generated automatically from
specifications in files named @file{syscalls.list}. There are several
such files, one in @file{sysdeps/unix} and others in its subdirectories.
Some special system calls are implemented in files that are named with a
Update. 1997-09-05 03:15 Ulrich Drepper <drepper@cygnus.com> * Makefile (subdirs): Reorganize order so that nss follows add-ons. * config.make.in (LDAP): Add. * configure.in: Prepare for ldap add-on. * shlib-versions: Add version numbers for ldap NSS module. * nss/Makefile: Add rules to build ldap NSS module. * db/btree/bt_page.c (__bt_free): Update meta data information. Update db from db-2.3.6. * db2/db.h: Updated. * db2/btree/bt_close.c: Updated. * db2/btree/bt_compare.c: Updated. * db2/btree/bt_conv.c: Updated. * db2/btree/bt_cursor.c: Updated. * db2/btree/bt_delete.c: Updated. * db2/btree/bt_put.c: Updated. * db2/btree/bt_rec.c: Updated. * db2/btree/bt_recno.c: Updated. * db2/btree/bt_search.c: Updated. * db2/btree/bt_split.c: Updated. * db2/btree/bt_stat.c: Updated. * db2/common/db_appinit.c: Updated. * db2/common/db_apprec.c: Updated. * db2/common/db_byteorder.c: Updated. * db2/common/db_err.c: Updated. * db2/common/db_region.c: Updated. * db2/db/db.c: Updated. * db2/db/db_conv.c: Updated. * db2/db/db_dup.c: Updated. * db2/db/db_pr.c: Updated. * db2/db/db_ret.c: Updated. * db2/db185/db185.c: Updated. * db2/dbm/dbm.c: Updated. * db2/hash/hash_dup.c: Updated. * db2/include/db_am.h: Updated. * db2/include/db_page.h: Updated. * db2/include/mp.h: Updated. * db2/include/queue.h: Updated. * db2/log/log.c: Updated. * db2/log/log_findckp.c: Updated. * db2/log/log_get.c: Updated. * db2/log/log_rec.c: Updated. * db2/mp/mp_bh.c: Updated. * db2/mp/mp_fopen.c: Updated. * db2/mp/mp_pr.c: Updated. * db2/mp/mp_sync.c: Updated. * db2/mutex/x86.gcc: Updated. * db2/os/db_os_dir.c: Updated. * db2/os/db_os_fid.c: Updated. * db2/progs/db_archive/db_archive.c: Updated. * db2/progs/db_checkpoint/db_checkpoint.c: Updated. * db2/progs/db_deadlock/db_deadlock.c: Updated. * db2/progs/db_dump/db_dump.c: Updated. * db2/progs/db_dump185/db_dump185.c: Updated. * db2/progs/db_load/db_load.c: Updated. * db2/progs/db_printlog/db_printlog.c: Updated. * db2/progs/db_recover/db_recover.c: Updated. * db2/progs/db_stat/db_stat.c: Updated. * db2/txn/txn.c: Updated. * db2/txn/txn_rec.c: Updated. * db2/Makefile: Add rule to build db_printlog. * db2/config.h: Don't include endian.h and don't define WORDS_BIGENDIAN. Only define HAVE_ENDIAN_H. * elf/dl-open.c (_dl_open): Make thread-safe. * elf/dl-close.c (_dl_close): Likewise. * elf/dlclose.c: Pretty print. * elf/dl-version.c (make_string): Use __strdup not strdup. (find_needed): Don't use l_searchlist of _dl_loaded, use the l_next list. * elf/dl-deps.c (_dl_map_object_deps): Remove variable head. * manual/math.texi: Add note about == and != for FP values. * manual/message.texi: Mention problems with relative paths and binstextdomain. * manual/string.texi: Mark strdupa and strndupa correctly as macros. * sunrpc/Makefile (CFLAGS-xkey_prot.c): Define to prevent warnings. * sunrpc/rpc_cout.c: Avoid needless races around return value. * sysdeps/generic/stpcpy.c: Include <config.h> if wanted. Update from tzdata-1997h. * time/africa: Updated. * time/europe: Updated. * time/iso3166.tab: Updated. * time/northamerica: Updated. * time/southamerica: Updated. * time/zone.tab: Updated. 1997-09-04 13:19 Richard Henderson <rth@cygnus.com> * sysdeps/alpha/w_sqrt.S: Removed. * sysdeps/alpha/fpu/e_sqrt.c: New. Obey -mieee and -mieee-with-inexact and build a version that is as fast as possible given the constraint. 1997-08-30 Andreas Jaeger <aj@arthur.rhein-neckar.de> * manual/maint.texi: Document some defaults for configuration parameters. 1997-09-04 15:57 Ulrich Drepper <drepper@cygnus.com> * termios/cfsetspeed.c (cfsetspeed): Change return value to int. * termios/termios.h: Change prototype accordingly. Reported by Andreas Jaeger <aj@arthur.rhein-neckar.de>. 1997-07-26 14:42 H.J. Lu <hjl@gnu.ai.mit.edu> * libio/stdfiles.c (_libio_using_thunks): Define if _G_USING_THUNKS is defined. * libio/_G_config.h: Moved to ... * sysdeps/generic/_G_config.h: ...here. * sysdeps/unix/sysv/linux/_G_config.h: New, Add vtable thunks support. 1997-09-02 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/Makefile (pic-ccflag): Override it for more efficient code (together with a change in gcc). * Makeconfig (pic-ccflag): New variable. (CFLAGS-.os): Use it instead of hardcoding -fPIC. 1997-09-02 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/dl-machine.h (elf_machine_load_address): Use _dl_start instead of a local label, to avoid getting an unreadable label name. 1997-09-02 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * nss/Makefile ($(objpfx)libnss_db.so): Use $(dbobjdir) to find libdb.so. * Makeconfig (dbobjdir): Use db2. 1997-08-31 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * manual/maint.texi (Porting to Unix): Update description of the implementation of Unix system calls. (Contributors): Use real umlaut in tege's name. 1997-08-30 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/libm-ieee754/w_gamma.c: Make compilable with _IEEE_LIBM. * sysdeps/libm-ieee754/w_gammaf.c: Likewise. * sysdeps/libm-ieee754/w_gammal.c: Likewise.
1997-09-05 03:43:20 +02:00
suffix of @samp{.S}; for example, @file{_exit.S}. Files ending in
@samp{.S} are run through the C preprocessor before being fed to the
assembler.
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These files all use a set of macros that should be defined in
@file{sysdep.h}. The @file{sysdep.h} file in @file{sysdeps/unix}
partially defines them; a @file{sysdep.h} file in another directory must
finish defining them for the particular machine and operating system
variant. See @file{sysdeps/unix/sysdep.h} and the machine-specific
@file{sysdep.h} implementations to see what these macros are and what
they should do.@refill
The system-specific makefile for the @file{unix} directory
(@file{sysdeps/unix/Makefile}) gives rules to generate several files
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from the Unix system you are building the library on (which is assumed
to be the target system you are building the library @emph{for}). All
the generated files are put in the directory where the object files are
kept; they should not affect the source tree itself. The files
generated are @file{ioctls.h}, @file{errnos.h}, @file{sys/param.h}, and
@file{errlist.c} (for the @file{stdio} section of the library).
@ignore
@c This section might be a good idea if it is finished,
@c but there's no point including it as it stands. --rms
@c @appendixsec Compatibility with Traditional C
@c ??? This section is really short now. Want to keep it? --roland
@c It's not anymore true. glibc 2.1 cannot be used with K&R compilers.
@c --drepper
update from main archive 961207 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.
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Although the GNU C library implements the @w{ISO C} library facilities, you
@emph{can} use the GNU C library with traditional, ``pre-ISO'' C
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compilers. However, you need to be careful because the content and
organization of the GNU C library header files differs from that of
traditional C implementations. This means you may need to make changes
to your program in order to get it to compile.
@end ignore