This patch replaces the following patches:

1367, 1403

This patch has no known incompatiblities with other patches.

This patch fixes the following bugs:

440759 - missing pthread define
501560 - POSIX semaphores are incompatible across ABIs

1. Patch SG0001645 Release Note

       This release note describes patch SG0001645 to IRIX 6.2 and
       IRIX 6.3.

       This patch contains bug fixes for all platforms running IRIX
       6.2 and IRIX 6.3.

       This patch contains bug fixes for the IRIX 6.2 and IRIX 6.3
       development environment.  It replaces patches 1367 and 1403.

       This patch contains fixes for the following bugs in IRIX 6.2
       and IRIX 6.3.  Bug numbers from Silicon Graphics bug
       tracking system are included for reference.

          o Bug 501560: POSIX semaphores are not compatible across
            MIPS ABIs and across the various releases of IRIX (see
            Chapter 2 of these release notes for details).

          o Bug 440759: Update _POSIX_VERSION to conform to POSIX
            1003.1c.

       This patch release includes these subsystems:

          o patchSG0001645.eoe_hdr.lib

       Because you want to install only the patches for problems
       you have encountered, patch software is not installed by
       default.  After reading the descriptions of the bugs fixed
       in this patch (see Section 1.3), determine the patches that
       meet your specific needs.

       If, after reading Sections 1.1 and 1.2 of these release
       notes, you are unsure whether your hardware and software
       meet the requirements for installing a particular patch, run
       inst.  The inst program does not allow you to install
       patches that are incompatible with your hardware or
       software.


       Patch software is installed like any other Silicon Graphics
       software product.  Follow the instructions in your Software
       Installation Administrator's Guide to bring up the miniroot
       form of the software installation tools.

       Follow these steps to select a patch for installation:

         1.  At the Inst> prompt, type

             install patchSGxxxxxxx

             where xxxxxxx is the patch number.

         2.  Initiate the installation sequence. Type

             Inst> go

         3.  You may find that two patches have been marked as
             incompatible.  (The installation tools reject an
             installation request if an incompatibility is
             detected.)  If this occurs, you must deselect one of
             the patches.

             Inst> keep patchSGxxxxxxx

             where xxxxxxx is the patch number.

         4.  After completing the installation process, exit the
             inst program by typing

             Inst> quit

       To remove a patch, use the versions remove command as you
       would for any other software subsystem.  The removal process
       reinstates the original version of software unless you have
       specifically removed the patch history from your system.

       versions remove patchSGxxxxxxx

       where xxxxxxx is the patch number.

       To keep a patch but increase your disk space, use the
       versions removehist command to remove the patch history.

       versions removehist patchSGxxxxxxx


       where xxxxxxx is the patch number.

       2.  Patch_SG0001645_POSIX_Semaphore_Note

       This release note describes POSIX semaphore modifications in
       patch SG0001645 to IRIX 6.2 and IRIX 6.3.

       2.1  Data_Structure_Expansion

       The /usr/include/semaphore.h header file included in this
       patch extends the size of the sem_t data structure type.
       This expansion is necessary to ensure cross MIPS ABI
       compatibility, and to allow room for new features in
       subsequent releases of IRIX.

       2.2  What_Applications_Are_Affected?

       The new semaphore.h header file only affects POSIX unnamed
       semaphores; POSIX named semaphores and other classes of
       semaphore are unchanged.  The remainder of this section
       explains the impact of this patch on POSIX unnamed
       semaphores.

       Existing binaries that depend on the size of a sem_t cannot
       be mixed with binaries compiled using this patch.

       Therefore, it is recommended that all applications using
       POSIX unnamed semaphores be recompiled using the new version
       of semaphore.h supplied by this patch.  The new version will
       be shipped with all future releases of IRIX.

       Applications that cannot be recompiled with the new version
       of semaphore.h will continue to execute on IRIX, but
       compatibility is limited in the following manner:

          o POSIX unnamed semaphores or data containing them may
            not be shared between modules compiled with the
            original version of semaphore.h and modules compiled
            with the new semaphore.h (supplied by this patch and in
            future IRIX releases).

          o POSIX unnamed semaphores will remain incompatible
            across MIPS ABIs.

No Requirements Information Available.

These checksums help to provide a 'signature' for the patch inst image which can be used to authenticate other inst images. You can obtain this kind of output by running sum -r on the image (from the command line):

37746      1   patchSG0001645
46311     50   patchSG0001645.eoe_hdr
64809      3   patchSG0001645.idb

The following lists the files which get installed from each subsystem in the patch:

patchSG0001645.eoe_hdr.lib

usr/include/limits.h
usr/include/mqueue.h
usr/include/rtlock.h
usr/include/sched.h
usr/include/semaphore.h
usr/include/sys.s
usr/include/time.h
usr/include/unistd.h
usr/relnotes/patchSG0001645/TC
usr/relnotes/patchSG0001645/ch1.z
usr/relnotes/patchSG0001645/ch2.z

Download Server	File Name	Date Added	Size	Download
download.sgi.com	patchSG0001645.tar	25-Jun-1997	40 K	FTP	HTTP
download.sgi.com	patchSG0001645.tardist	25-Jun-1997	40 K	FTP	HTTP
FTP = download using FTP protocol HTTP = download using HTTP protocol = store in your basket for downloading later