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Annotation of gcc/README.RS6000, revision 1.1.1.7

1.1.1.7 ! root        1:                     AIX 3.1 and 3.2 assembler problems
        !             2: 
1.1.1.5   root        3: Specifying the -g flag to GCC on the RS/6000 requires upgrading the
1.1.1.6   root        4: standard AIX assembler distributed with AIX 3.1 and versions of AIX
                      5: 3.2 earlier than 3.2.4 with a replacement that is available from IBM.
                      6: Note that Makefile.in specifies the -g when compiling libgcc2.c.
1.1.1.5   root        7: 
1.1.1.7 ! root        8: You can test for the presence of a fixed assembler by entering the following:
1.1.1.5   root        9:                % as -u < /dev/null
                     10: If the command exits normally, the assembler fix already is installed.
                     11: If the assembler complains that "-u" is an unknown flag, you need to order
                     12: the fix.
1.1       root       13: 
1.1.1.6   root       14: If you are running AIX 3.1 (lslpp -h bos.obj output reports
                     15: 03.01.0005.XXXX where the 0005 can be any higher number and the XXXX
                     16: can be any value), call IBM Support at 800-237-5511 and ask for
                     17: shipment of AIX/6000 fix PTF U403044 for APAR IX22829 (.extern foo
                     18: conflicts with defining foo).
                     19: 
                     20: If you are running AIX 3.2 but not 3.2.4 or later (lslpp -h bos.obj
                     21: output reports 03.02.0000.0000), a newer update to the assembler fix
                     22: is available.  Ask for shipment of AIX/6000 fix PTF U416277 for
                     23: IX32992 (.global prevents detection of duplicate symbol).
                     24: 
                     25: If you are running AIX 3.2.4 or later, you already have the new
                     26: assembler.
1.1.1.5   root       27: 
1.1.1.7 ! root       28: Any customer can order and get the replacement assembler, and install it on
        !            29: one or more machines.  It is available on diskette from IBM Customer Support
        !            30: and from the IBM Internet fix anonymous ftp server (FixDist) at
        !            31: aix.boulder.ibm.com (198.17.57.66).
        !            32: 
        !            33: If you contact IBM Customer Support, they may also ask you for your customer
        !            34: number.  If you do not know it, you will still be able to get the fix, but
        !            35: you will have to be persistent.  IBM has corresponding support organizations
        !            36: outside of North America.  Call your IBM branch office and ask them to put
        !            37: you in touch with the department that handles fixes for AIX/6000.  If that
        !            38: doesn't work, ask for the department that handles software defect support
        !            39: for AIX/6000 and ask for the APAR fix.
        !            40: 
        !            41: 
        !            42:                              AIX NLS problems
1.1.1.3   root       43: 
1.1.1.5   root       44: AIX on the RS/6000 provides support (NLS) for environments outside of
                     45: the United States.  Compilers and assemblers use NLS to support
                     46: locale-specific representations of various objects including
                     47: floating-point numbers ("." vs "," for separating decimal fractions).
                     48: There have been problems reported where the library linked with GCC does
                     49: not produce the same floating-point formats that the assembler accepts.
                     50: If you have this problem, set the LANG environment variable to "C" or
                     51: "En_US".
1.1.1.6   root       52: 
1.1.1.7 ! root       53: 
        !            54:                         AIX 3.2.5 XLC-1.3 problems
        !            55: 
        !            56: XLC version 1.3.0.0 distributed with AIX 3.2.5 will miscompile jump.c when
        !            57: building the stage1 compiler during the bootstrap process.  This will cause
        !            58: GCC to crash and the bootstrap to fail later while compiling libgcc2.c.  XLC
        !            59: version 1.3.0.1 or later fixes this problem.  XLC-1.3.0.19 also cannot
        !            60: bootstrap GCC so please avoid that release as well.  You can obtain
        !            61: XLC-1.3.0.24 by requesting PTF 432238 from IBM, or just ask for the latest
        !            62: release of XLC-1.3.
        !            63: 
        !            64: There also have been reports of problems bootstrapping GCC with some older
        !            65: releases of xlc-1.2.1, including xlc-1.2.1.8.  Newer releases of xlc-1.2.1
        !            66: do not exhibit this problem: xlc-1.2.1.28 is known to bootstrap properly.
        !            67: 
        !            68: 
        !            69:                        AIX 3.2 common-mode support
        !            70: 
        !            71: AIX common-mode providing transparent support of both the POWER and PowerPC
        !            72: architectures is usable in AIX 3.2.3 and above but an export file and
        !            73: support for hidden export via libc.a will not exist until AIX 4.1.  libgcc.a
        !            74: also must be compiled in common-mode.  Note that executables generated for
        !            75: the POWER (RIOS1 and RSC) architecture will run directly on systems using
        !            76: the MPC601 chip.  Common-mode only improves the performance of a single
        !            77: executable run on both POWER and PowerPC architecture platforms by not using
        !            78: POWER- or PowerPC-specific instructions and eliminating the need to trap to
        !            79: emulation (for POWER instructions run on PowerPC).
        !            80: 
        !            81: To link a common-mode application prior to AIX 4.1 and run it on a system at
        !            82: AIX level 3.2.3 or above, use the text between the "<>" as an export file
        !            83: (e.g. milli.exp)
        !            84: 
        !            85: <><><><><><><><><><><>
        !            86: #!
        !            87: __mulh          0x3100
        !            88: __mull          0x3180
        !            89: __divss         0x3200
        !            90: __divus         0x3280
        !            91: __quoss         0x3300
        !            92: __quous         0x3380
        !            93: <><><><><><><><><><><>
        !            94: 
        !            95: and then link with -Wl,-bI:milli.exp.

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