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Annotation of gcc/README-VMS, revision 1.1

1.1     ! root        1: Return-Path: <[email protected]>
        !             2: Date: 11 Sep 90 14:07:21 GMT
        !             3: From: [email protected]  (USENET News System)
        !             4: Organization: University of Pennsylvania
        !             5: Subject: Building gcc 1.37.1 with Vax C
        !             6: References: <[email protected]>
        !             7: Sender: [email protected]
        !             8: To: [email protected]
        !             9: 
        !            10: during it; hopefully they'll come in handy.
        !            11:  
        !            12:  To build the new gcc-cpp and gcc-cc1 that come with Gnu C
        !            13: version 1.37.1 with Vax C and NOT a previous version of gcc,
        !            14: do the following:
        !            15:  
        !            16: I - Building gcc-cpp
        !            17:  
        !            18:    A - Modify cccp.c
        !            19:  
        !            20:      1 - Replace
        !            21:  
        !            22:        #include <sys/types.h>
        !            23:        #include <sys/stat.h>
        !            24:  
        !            25:        with
        !            26:  
        !            27:        #ifndef VMS
        !            28:        #include <sys/types.h>
        !            29:        #include <sys/stat.h>
        !            30:        #else
        !            31:        #include <types.h>
        !            32:        #include <stat.h>
        !            33:        #endif
        !            34: 
        !            35: [It is claimed that
        !            36:     $ define sys sys$library
        !            37:  will solve the same problem without source changes.]
        !            38:  
        !            39:      2 - In the VMS-specific section (has perror.h etc in it),
        !            40: add the following:
        !            41:  
        !            42:        #include <descrip.h>    /* for dsc$descriptor_s */
        !            43:        #include <string.h>     /* for strchr & strrchr */
        !            44:        #define index   strchr
        !            45:        #define rindex  strrchr
        !            46:  
        !            47:      3 - You have to replace all occurences of:
        !            48:  
        !            49:        extern char *index(), *rindex();
        !            50:  
        !            51:  as well as any where they're separated (e.g. extern char *index()
        !            52:  by itself or extern char *rindex() by itself), with the following:
        !            53:  
        !            54:        #ifndef VMS
        !            55:        extern char *index();   /* or whatever was here */
        !            56:        #endif
        !            57:  
        !            58:  There's a total of three: one in main(), one in do_include(), and
        !            59:  one in hack_vms_include_specification().
        !            60:  
        !            61:    B - You have to have alloca.mar for cccp.c; it was distributed
        !            62:  with vmsgcc1.34; it's also in the bison distribution. (both 1.03
        !            63:  and 1.06)
        !            64:  
        !            65:    C - After you've compiled alloca.mar (MACRO ALLOCA.MAR), follow
        !            66:  the instructions at the top of MAKE-CC1.COM (namely, change the
        !            67:  CC := line to say cc/noopt instead of gcc, take the
        !            68:  cc1_options="-mpcc-alignment" part out of the CFLAGS line, and change
        !            69:  the LIBS line to say:
        !            70:  
        !            71:        $ LIBS :=       alloca,sys$share:vaxcrtl/libr
        !            72:  
        !            73:    D - Since it doesn't come with the distribution, you have
        !            74:  to generate cexp_tab.c yourself, either with bison on either
        !            75:  a Vax or a Unix box, or yacc in Unix. (@make below will die if you
        !            76:  don't have bison on your Vax or don't have this file)
        !            77:  
        !            78:    E - Type:
        !            79:  
        !            80:        @make
        !            81:  
        !            82:  and watch it hum. It should go through okay; it'll die on the LINK
        !            83: line, but don't worry about it.
        !            84:  
        !            85:    F - Now link the whole thing with:
        !            86:  
        !            87:        link /nomap/exe=gcc-cpp cccp,cexp,version,alloca,-
        !            88:         sys$share:vaxcrtl/libr
        !            89:  
        !            90:    G - You should be screaming for joy right now; if you're not, then
        !            91: give up on life. <snicker>
        !            92:  
        !            93:  
        !            94: II - Building gcc-cc1
        !            95:  
        !            96:    A - Change MAKE-CC1.COM to contain the line:
        !            97:  
        !            98:        $ libs :== sys$share:vaxcrtl/libr,alloca
        !            99:  
        !           100: Yep, you have to have alloca.obj here too.
        !           101:  
        !           102:    B - Modify toplev.c:
        !           103:  
        !           104:      1 - Replace
        !           105:  
        !           106:        #include <sys/types.h>
        !           107:        #include <sys/stat.h>
        !           108:  
        !           109:        with
        !           110:  
        !           111:        #ifndef VMS
        !           112:        #include <sys/types.h>
        !           113:        #include <sys/stat.h>
        !           114:        #else
        !           115:        #include <types.h>
        !           116:        #include <stat.h>
        !           117:        #endif
        !           118:  
        !           119: (You'll see this again.)
        !           120:  
        !           121:      2 - Do:
        !           122:  
        !           123: Repl:  rtx_equal_function_value_matters
        !           124: With:  rtx_equ_func_value_matters
        !           125: Num:   once
        !           126:  
        !           127:  This is cuz you can't have a name over 31 chars with the
        !           128: Vax C compiler; and yep you guessed it this is over that
        !           129: limit. You're gonna be doing this a few more times.
        !           130:  
        !           131:    C - Modify gcc.c:
        !           132:  
        !           133:      1 - This is optional, since you never compile it (I'm
        !           134: working on that):
        !           135:  
        !           136:        Replace
        !           137:  
        !           138:        #include <stdio.h>
        !           139:        #include <sys/types.h>
        !           140:        #include <signal.h>
        !           141:        #include <sys/file.h>
        !           142:  
        !           143:        with
        !           144:  
        !           145:        #include <stdio.h>
        !           146:        #include <signal.h>
        !           147:        #ifdef VMS
        !           148:        #include <types.h>
        !           149:        #include <file.h>
        !           150:        #else
        !           151:        #include <sys/types.h>
        !           152:        #include <sys/file.h>
        !           153:        #endif
        !           154:  
        !           155:    D - Modify c-parse_tab.c (if this isn't there, you'll have
        !           156: to create it with bison or yacc):
        !           157:  
        !           158: Repl:  expand_start_loop_continue_elsewhere
        !           159: With:  expand_startloop_cont_elsewhere
        !           160: Num:   twice
        !           161:  
        !           162:    E - Modify tree.h:
        !           163:  
        !           164: Repl:  expand_start_loop_continue_elsewhere
        !           165: With:  expand_startloop_cont_elsewhere
        !           166: Num:   once
        !           167:  
        !           168:    F - Modify stmt.c:
        !           169:  
        !           170: Repl:  expand_start_loop_continue_elsewhere
        !           171: With:  expand_startloop_cont_elsewhere
        !           172: Num:   twice
        !           173:  
        !           174: Repl:  current_function_returns_pcc_struct
        !           175: With:  cur_func_ret_pcc_struct
        !           176: Num:   nine
        !           177:  
        !           178: Repl:  current_function_returns_pointer
        !           179: With:  cur_func_ret_ptr
        !           180: Num:   2
        !           181:  
        !           182: Repl:  current_function_pretend_args_size
        !           183: With:  cur_func_pretend_args_size
        !           184: Num:   3
        !           185:  
        !           186:    G - Modify rtanal.c:
        !           187:  
        !           188: Repl:  rtx_equal_function_value_matters
        !           189: With:  rtx_equ_func_values_matters
        !           190: Num:   twice
        !           191:  
        !           192:    H - Modify output.h:
        !           193:  
        !           194: Repl:  current_function_returns_pcc_struct
        !           195: With:  cur_func_ret_pcc_struct
        !           196: Num:   once
        !           197:  
        !           198: Repl:  current_function_returns_pointer
        !           199: With:  cur_func_ret_ptr
        !           200: Num:   once
        !           201:  
        !           202: Repl:  current_function_pretend_args_size
        !           203: With:  cur_func_pretend_args_size
        !           204: Num:   once
        !           205:  
        !           206:    I - Modify tree.def:
        !           207:  
        !           208:  Change the line that reads:
        !           209:  
        !           210:        DEFTREECODE (FILE_TYPE, "file_type", "t", 0)
        !           211:  
        !           212:  to:
        !           213:  
        !           214:        #ifdef VMS
        !           215:        DEFTREECODE (FILE_TYPE_GNU, "file_type", "t", 0)
        !           216:        #else
        !           217:        DEFTREECODE (FILE_TYPE, "file_type", "t", 0)
        !           218:        #endif
        !           219:  
        !           220:  This is cuz FILE_TYPE is defined in stdio.h as being
        !           221: struct _iobuf *, which totally screws everything up.
        !           222:  
        !           223:    J - Modify expr.c:
        !           224:  
        !           225:  Change the line that reads:
        !           226:  
        !           227:        if (code == FILE_TYPE)
        !           228:  
        !           229:  to:
        !           230:  
        !           231:        #ifdef VMS
        !           232:        if (code == FILE_TYPE_GNU)
        !           233:        #else
        !           234:        if (code == FILE_TYPE)
        !           235:        #endif
        !           236:  
        !           237:    K - Modify expmed.c:
        !           238:  
        !           239:  Change the line that reads:
        !           240:  
        !           241:  trymode && GET_MODE_SIZE (trymode) <= maxsize;
        !           242:  
        !           243:  to:
        !           244:  
        !           245:  (trymode != 0) && (GET_MODE_SIZE (trymode) <= maxsize);
        !           246:  
        !           247:  Enclosing the second half of the and in parenthesis may be
        !           248: overkill. By the time I thought of it it was too late to
        !           249: change it (read: I didn't feel like going back), but you
        !           250: may want to give it a try.
        !           251:  
        !           252:    L - Modify symout.c:
        !           253:  
        !           254:  Change the line that has #include <stddef.h> on it to:
        !           255:  
        !           256:        #ifndef VMS
        !           257:        #include <stddef.h>
        !           258:        #else
        !           259:        #define NULL    (void *) 0
        !           260:        #endif
        !           261:  
        !           262:    M - Modify insn-emit.c:
        !           263:  
        !           264:  Line #1011 (in mine) is a 376-character long line that's
        !           265: one HUGE return (it calls a function a few zillion times
        !           266: embedded upon each other). This is a tad too big for Vax C
        !           267: to chew; try cutting it down to a few lines. I made it look
        !           268: like this:
        !           269:  
        !           270: rtx
        !           271: gen_casesi (operand0, operand1, operand2, operand3)
        !           272:      rtx operand0;
        !           273:      rtx operand1;
        !           274:      rtx operand2;
        !           275:      rtx operand3;
        !           276: {
        !           277:   return gen_rtx (SET, VOIDmode, pc_rtx,
        !           278:    gen_rtx (IF_THEN_ELSE, VOIDmode,
        !           279:     gen_rtx (LE, VOIDmode,
        !           280:      gen_rtx (MINUS, SImode, operand0, operand1),
        !           281:     operand2),
        !           282:     gen_rtx (PLUS, SImode,
        !           283:      gen_rtx (SIGN_EXTEND, SImode,
        !           284:       gen_rtx (MEM, HImode,
        !           285:        gen_rtx (PLUS, SImode, pc_rtx,
        !           286:         gen_rtx (MINUS, SImode, operand0, operand1)))),
        !           287:      gen_rtx (LABEL_REF, SImode, operand3)),
        !           288:    pc_rtx));
        !           289: }
        !           290:  
        !           291:  Kinda smacks of lisp, no?
        !           292:  
        !           293:    N - Modify final.c:
        !           294:  
        !           295:  Change the line that reads:
        !           296:  
        !           297:        rtx final_sequence;
        !           298:  
        !           299:  to:
        !           300:  
        !           301:        #ifndef VMS
        !           302:        rtx final_sequence;
        !           303:        #endif
        !           304:  
        !           305:  This is cuz rtx final_sequence already appears in
        !           306: output.h, and Vax C screams when it sees this.
        !           307:  
        !           308:    O - You have to have alloca(), bcopy(), bcmp(), and
        !           309: bzero(); all are in the VMS Gcc 1.34 distribution; only
        !           310: bcopy() is in the bison distribution. Since they're pretty
        !           311: short, I'm gonna include 'em here. These were sent under the
        !           312: Gnu public license.
        !           313:  
        !           314:  alloca.mar:
        !           315:  
        !           316:         .PSECT  $CODE,LONG,PIC,REL,SHR,EXE,RD,NOWRT
        !           317:         .ENTRY  ALLOCA,^M<>
        !           318:         SUBL2   4(AP),SP
        !           319:         MOVL    16(FP),R1
        !           320:         MOVQ    8(FP),AP
        !           321:         BICL2   #3,SP
        !           322:         ADDL2   #28,SP
        !           323:         MOVL    SP,R0
        !           324:         JMP     (R1)
        !           325:  
        !           326:         .END
        !           327:  
        !           328:  bcopy.mar:
        !           329:  
        !           330:         .PSECT  $CODE,LONG,PIC,REL,SHR,EXE,RD,NOWRT
        !           331:        ; bcopy(from, to, size)
        !           332:         .ENTRY  BCOPY,^M<R2,R3,R4,R5,R6>
        !           333:         MOVL    4(AP),R1
        !           334:         MOVL    8(AP),R3
        !           335:         MOVL    12(AP),R6
        !           336:         CMPL    R1,R3
        !           337:         BGTR    2$              ; NORMAL FORWARD CASE
        !           338:         BLSS    3$              ; OVERLAPPING, MUST DO BACKWARDS
        !           339:         RET                     ; EQUAL, NOTHING TO DO
        !           340: 1$:    SUBL2   R0,R6
        !           341:         MOVC3   R0,(R1),(R3)
        !           342: 2$:    MOVZWL  #65535,R0
        !           343:         CMPL    R6,R0
        !           344:         BGTR    1$
        !           345:         MOVC3   R6,(R1),(R3)
        !           346:         RET
        !           347: 3$:    ADDL2   R6,R1
        !           348:         ADDL2   R6,R3
        !           349:         MOVZWL  #65535,R0
        !           350:         BRW     5$
        !           351: 4$:    SUBL2   R0,R6
        !           352:         SUBL2   R0,R1
        !           353:         SUBL2   R0,R3
        !           354:         MOVC3   R0,(R1),(R3)
        !           355:         MOVZWL  #65535,R0
        !           356:         SUBL2   R0,R1
        !           357:         SUBL2   R0,R3
        !           358: 5$:    CMPL    R6,R0
        !           359:         BGTR    4$
        !           360:         SUBL2   R6,R1
        !           361:         SUBL2   R6,R3
        !           362:         MOVC3   R6,(R1),(R3)
        !           363:  
        !           364:        RET
        !           365:  
        !           366:         .END
        !           367:  
        !           368:  bcmp.mar:
        !           369:  
        !           370:         .PSECT  $CODE,LONG,PIC,REL,SHR,EXE,RD,NOWRT
        !           371:        ; bcmp(s1, s2, n)
        !           372:         .ENTRY  BCMP,^M<R2,R3,R4,R5>
        !           373:         MOVL    4(AP),R1
        !           374:         MOVL    8(AP),R3
        !           375:         MOVL    12(AP),R4
        !           376: 1$:    MOVZWL  #65535,R0
        !           377:         CMPL    R4,R0
        !           378:         BLEQ    2$
        !           379:         SUBL2   R0,R4
        !           380:         CMPC3   R0,(R1),(R3)
        !           381:         BEQL    1$
        !           382:         ADDL2   R4,R0
        !           383:         RET
        !           384: 2$:    CMPC3   R4,(R1),(R3)
        !           385:         RET
        !           386:  
        !           387:         .END
        !           388:  
        !           389:  
        !           390:  bzero.mar:
        !           391:  
        !           392:         .PSECT  $CODE,LONG,PIC,REL,SHR,EXE,RD,NOWRT
        !           393:        ; bzero(ptr, size)
        !           394:         .ENTRY  BZERO,^M<R2,R3,R4,R5>
        !           395:         MOVL    4(AP),R3
        !           396:         BRB     2$
        !           397: 1$:    SUBL2   R0,8(AP)
        !           398:         MOVC5   #0,(R3),#0,R0,(R3)
        !           399: 2$:    MOVZWL  #65535,R0
        !           400:         CMPL    8(AP),R0
        !           401:         BGTR    1$
        !           402:         MOVC5   #0,(R3),#0,8(AP),(R3)
        !           403:         RET
        !           404:  
        !           405:         .END
        !           406:  
        !           407:    P - On the last lines (where it's got all of the link shit),
        !           408: change it so it reads:
        !           409:  
        !           410:        ...blahblahblah...
        !           411:        ...blahblah,insn-extract,insn-output,obstack,-
        !           412:        integrate,caller-save,-
        !           413:        bcopy,bcmp,bzero
        !           414:        $!
        !           415:  
        !           416:  So now it'll link the bcopy, bcmp, and bzero routines in.
        !           417:  
        !           418:    Q - You should be screaming for joy right now; if you're
        !           419: not, then give up on life again. Hey, I don't get paid for my humor.
        !           420:  
        !           421:    R - Finally, you have to use old versions of:
        !           422:  
        !           423:                GCC.EXE         GCC-AS.EXE
        !           424:                GCC.COM         GCC.CLD
        !           425:                GCCLIB.OLB
        !           426:  
        !           427:  to make the package work properly. I've only been able to make the
        !           428:  new preprocessors make properly; since it wasn't even in the make
        !           429:  files that came with it, I don't think gcc.exe 1.37.1 was intended
        !           430:  to be built for the Vax .. we'll see.
        !           431:  
        !           432:  In case you're wondering, I could never get vmsgcc134 to work properly;
        !           433: that's why I did this with Vax C.
        !           434:  
        !           435:  Good luck! This only worked under 5.3-1 (and the latest version of
        !           436: Vax C...3.0? 3.1?), and isn't guaranteed in any way shape or form. If
        !           437: you have stumbling blocks and think I may have come upon it during all
        !           438: of this, feel free to mail me at [email protected].
        !           439:  
        !           440: --
        !           441: Brendan Kehoe | Soon: [email protected]
        !           442: For now: [email protected] | Or: [email protected]
        !           443:      Last resort: [email protected]
        !           444: Brendan Kehoe | Soon: [email protected]
        !           445: For now: [email protected] | Or: [email protected]
        !           446: Last resort: [email protected]
        !           447: 

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