+Return-Path: <info-gcc-request@prep.ai.mit.edu>
+Date: 11 Sep 90 14:07:21 GMT
+From: news@operations.dccs.upenn.edu (USENET News System)
+Organization: University of Pennsylvania
+Subject: Building gcc 1.37.1 with Vax C
+References: <9009102236.AA15872@wubios.wustl.edu>
+Sender: info-gcc-request@prep.ai.mit.edu
+To: info-gcc@prep.ai.mit.edu
+
+during it; hopefully they'll come in handy.
+
+ To build the new gcc-cpp and gcc-cc1 that come with Gnu C
+version 1.37.1 with Vax C and NOT a previous version of gcc,
+do the following:
+
+I - Building gcc-cpp
+
+ A - Modify cccp.c
+
+ 1 - Replace
+
+ #include <sys/types.h>
+ #include <sys/stat.h>
+
+ with
+
+ #ifndef VMS
+ #include <sys/types.h>
+ #include <sys/stat.h>
+ #else
+ #include <types.h>
+ #include <stat.h>
+ #endif
+
+[It is claimed that
+ $ define sys sys$library
+ will solve the same problem without source changes.]
+
+ 2 - In the VMS-specific section (has perror.h etc in it),
+add the following:
+
+ #include <descrip.h> /* for dsc$descriptor_s */
+ #include <string.h> /* for strchr & strrchr */
+ #define index strchr
+ #define rindex strrchr
+
+ 3 - You have to replace all occurences of:
+
+ extern char *index(), *rindex();
+
+ as well as any where they're separated (e.g. extern char *index()
+ by itself or extern char *rindex() by itself), with the following:
+
+ #ifndef VMS
+ extern char *index(); /* or whatever was here */
+ #endif
+
+ There's a total of three: one in main(), one in do_include(), and
+ one in hack_vms_include_specification().
+
+ B - You have to have alloca.mar for cccp.c; it was distributed
+ with vmsgcc1.34; it's also in the bison distribution. (both 1.03
+ and 1.06)
+
+ C - After you've compiled alloca.mar (MACRO ALLOCA.MAR), follow
+ the instructions at the top of MAKE-CC1.COM (namely, change the
+ CC := line to say cc/noopt instead of gcc, take the
+ cc1_options="-mpcc-alignment" part out of the CFLAGS line, and change
+ the LIBS line to say:
+
+ $ LIBS := alloca,sys$share:vaxcrtl/libr
+
+ D - Since it doesn't come with the distribution, you have
+ to generate cexp_tab.c yourself, either with bison on either
+ a Vax or a Unix box, or yacc in Unix. (@make below will die if you
+ don't have bison on your Vax or don't have this file)
+
+ E - Type:
+
+ @make
+
+ and watch it hum. It should go through okay; it'll die on the LINK
+line, but don't worry about it.
+
+ F - Now link the whole thing with:
+
+ link /nomap/exe=gcc-cpp cccp,cexp,version,alloca,-
+ sys$share:vaxcrtl/libr
+
+ G - You should be screaming for joy right now; if you're not, then
+give up on life. <snicker>
+
+
+II - Building gcc-cc1
+
+ A - Change MAKE-CC1.COM to contain the line:
+
+ $ libs :== sys$share:vaxcrtl/libr,alloca
+
+Yep, you have to have alloca.obj here too.
+
+ B - Modify toplev.c:
+
+ 1 - Replace
+
+ #include <sys/types.h>
+ #include <sys/stat.h>
+
+ with
+
+ #ifndef VMS
+ #include <sys/types.h>
+ #include <sys/stat.h>
+ #else
+ #include <types.h>
+ #include <stat.h>
+ #endif
+
+(You'll see this again.)
+
+ 2 - Do:
+
+Repl: rtx_equal_function_value_matters
+With: rtx_equ_func_value_matters
+Num: once
+
+ This is cuz you can't have a name over 31 chars with the
+Vax C compiler; and yep you guessed it this is over that
+limit. You're gonna be doing this a few more times.
+
+ C - Modify gcc.c:
+
+ 1 - This is optional, since you never compile it (I'm
+working on that):
+
+ Replace
+
+ #include <stdio.h>
+ #include <sys/types.h>
+ #include <signal.h>
+ #include <sys/file.h>
+
+ with
+
+ #include <stdio.h>
+ #include <signal.h>
+ #ifdef VMS
+ #include <types.h>
+ #include <file.h>
+ #else
+ #include <sys/types.h>
+ #include <sys/file.h>
+ #endif
+
+ D - Modify c-parse_tab.c (if this isn't there, you'll have
+to create it with bison or yacc):
+
+Repl: expand_start_loop_continue_elsewhere
+With: expand_startloop_cont_elsewhere
+Num: twice
+
+ E - Modify tree.h:
+
+Repl: expand_start_loop_continue_elsewhere
+With: expand_startloop_cont_elsewhere
+Num: once
+
+ F - Modify stmt.c:
+
+Repl: expand_start_loop_continue_elsewhere
+With: expand_startloop_cont_elsewhere
+Num: twice
+
+Repl: current_function_returns_pcc_struct
+With: cur_func_ret_pcc_struct
+Num: nine
+
+Repl: current_function_returns_pointer
+With: cur_func_ret_ptr
+Num: 2
+
+Repl: current_function_pretend_args_size
+With: cur_func_pretend_args_size
+Num: 3
+
+ G - Modify rtanal.c:
+
+Repl: rtx_equal_function_value_matters
+With: rtx_equ_func_values_matters
+Num: twice
+
+ H - Modify output.h:
+
+Repl: current_function_returns_pcc_struct
+With: cur_func_ret_pcc_struct
+Num: once
+
+Repl: current_function_returns_pointer
+With: cur_func_ret_ptr
+Num: once
+
+Repl: current_function_pretend_args_size
+With: cur_func_pretend_args_size
+Num: once
+
+ I - Modify tree.def:
+
+ Change the line that reads:
+
+ DEFTREECODE (FILE_TYPE, "file_type", "t", 0)
+
+ to:
+
+ #ifdef VMS
+ DEFTREECODE (FILE_TYPE_GNU, "file_type", "t", 0)
+ #else
+ DEFTREECODE (FILE_TYPE, "file_type", "t", 0)
+ #endif
+
+ This is cuz FILE_TYPE is defined in stdio.h as being
+struct _iobuf *, which totally screws everything up.
+
+ J - Modify expr.c:
+
+ Change the line that reads:
+
+ if (code == FILE_TYPE)
+
+ to:
+
+ #ifdef VMS
+ if (code == FILE_TYPE_GNU)
+ #else
+ if (code == FILE_TYPE)
+ #endif
+
+ K - Modify expmed.c:
+
+ Change the line that reads:
+
+ trymode && GET_MODE_SIZE (trymode) <= maxsize;
+
+ to:
+
+ (trymode != 0) && (GET_MODE_SIZE (trymode) <= maxsize);
+
+ Enclosing the second half of the and in parenthesis may be
+overkill. By the time I thought of it it was too late to
+change it (read: I didn't feel like going back), but you
+may want to give it a try.
+
+ L - Modify symout.c:
+
+ Change the line that has #include <stddef.h> on it to:
+
+ #ifndef VMS
+ #include <stddef.h>
+ #else
+ #define NULL (void *) 0
+ #endif
+
+ M - Modify insn-emit.c:
+
+ Line #1011 (in mine) is a 376-character long line that's
+one HUGE return (it calls a function a few zillion times
+embedded upon each other). This is a tad too big for Vax C
+to chew; try cutting it down to a few lines. I made it look
+like this:
+
+rtx
+gen_casesi (operand0, operand1, operand2, operand3)
+ rtx operand0;
+ rtx operand1;
+ rtx operand2;
+ rtx operand3;
+{
+ return gen_rtx (SET, VOIDmode, pc_rtx,
+ gen_rtx (IF_THEN_ELSE, VOIDmode,
+ gen_rtx (LE, VOIDmode,
+ gen_rtx (MINUS, SImode, operand0, operand1),
+ operand2),
+ gen_rtx (PLUS, SImode,
+ gen_rtx (SIGN_EXTEND, SImode,
+ gen_rtx (MEM, HImode,
+ gen_rtx (PLUS, SImode, pc_rtx,
+ gen_rtx (MINUS, SImode, operand0, operand1)))),
+ gen_rtx (LABEL_REF, SImode, operand3)),
+ pc_rtx));
+}
+
+ Kinda smacks of lisp, no?
+
+ N - Modify final.c:
+
+ Change the line that reads:
+
+ rtx final_sequence;
+
+ to:
+
+ #ifndef VMS
+ rtx final_sequence;
+ #endif
+
+ This is cuz rtx final_sequence already appears in
+output.h, and Vax C screams when it sees this.
+
+ O - You have to have alloca(), bcopy(), bcmp(), and
+bzero(); all are in the VMS Gcc 1.34 distribution; only
+bcopy() is in the bison distribution. Since they're pretty
+short, I'm gonna include 'em here. These were sent under the
+Gnu public license.
+
+ alloca.mar:
+
+ .PSECT $CODE,LONG,PIC,REL,SHR,EXE,RD,NOWRT
+ .ENTRY ALLOCA,^M<>
+ SUBL2 4(AP),SP
+ MOVL 16(FP),R1
+ MOVQ 8(FP),AP
+ BICL2 #3,SP
+ ADDL2 #28,SP
+ MOVL SP,R0
+ JMP (R1)
+
+ .END
+
+ bcopy.mar:
+
+ .PSECT $CODE,LONG,PIC,REL,SHR,EXE,RD,NOWRT
+ ; bcopy(from, to, size)
+ .ENTRY BCOPY,^M<R2,R3,R4,R5,R6>
+ MOVL 4(AP),R1
+ MOVL 8(AP),R3
+ MOVL 12(AP),R6
+ CMPL R1,R3
+ BGTR 2$ ; NORMAL FORWARD CASE
+ BLSS 3$ ; OVERLAPPING, MUST DO BACKWARDS
+ RET ; EQUAL, NOTHING TO DO
+1$: SUBL2 R0,R6
+ MOVC3 R0,(R1),(R3)
+2$: MOVZWL #65535,R0
+ CMPL R6,R0
+ BGTR 1$
+ MOVC3 R6,(R1),(R3)
+ RET
+3$: ADDL2 R6,R1
+ ADDL2 R6,R3
+ MOVZWL #65535,R0
+ BRW 5$
+4$: SUBL2 R0,R6
+ SUBL2 R0,R1
+ SUBL2 R0,R3
+ MOVC3 R0,(R1),(R3)
+ MOVZWL #65535,R0
+ SUBL2 R0,R1
+ SUBL2 R0,R3
+5$: CMPL R6,R0
+ BGTR 4$
+ SUBL2 R6,R1
+ SUBL2 R6,R3
+ MOVC3 R6,(R1),(R3)
+
+ RET
+
+ .END
+
+ bcmp.mar:
+
+ .PSECT $CODE,LONG,PIC,REL,SHR,EXE,RD,NOWRT
+ ; bcmp(s1, s2, n)
+ .ENTRY BCMP,^M<R2,R3,R4,R5>
+ MOVL 4(AP),R1
+ MOVL 8(AP),R3
+ MOVL 12(AP),R4
+1$: MOVZWL #65535,R0
+ CMPL R4,R0
+ BLEQ 2$
+ SUBL2 R0,R4
+ CMPC3 R0,(R1),(R3)
+ BEQL 1$
+ ADDL2 R4,R0
+ RET
+2$: CMPC3 R4,(R1),(R3)
+ RET
+
+ .END
+
+
+ bzero.mar:
+
+ .PSECT $CODE,LONG,PIC,REL,SHR,EXE,RD,NOWRT
+ ; bzero(ptr, size)
+ .ENTRY BZERO,^M<R2,R3,R4,R5>
+ MOVL 4(AP),R3
+ BRB 2$
+1$: SUBL2 R0,8(AP)
+ MOVC5 #0,(R3),#0,R0,(R3)
+2$: MOVZWL #65535,R0
+ CMPL 8(AP),R0
+ BGTR 1$
+ MOVC5 #0,(R3),#0,8(AP),(R3)
+ RET
+
+ .END
+
+ P - On the last lines (where it's got all of the link shit),
+change it so it reads:
+
+ ...blahblahblah...
+ ...blahblah,insn-extract,insn-output,obstack,-
+ integrate,caller-save,-
+ bcopy,bcmp,bzero
+ $!
+
+ So now it'll link the bcopy, bcmp, and bzero routines in.
+
+ Q - You should be screaming for joy right now; if you're
+not, then give up on life again. Hey, I don't get paid for my humor.
+
+ R - Finally, you have to use old versions of:
+
+ GCC.EXE GCC-AS.EXE
+ GCC.COM GCC.CLD
+ GCCLIB.OLB
+
+ to make the package work properly. I've only been able to make the
+ new preprocessors make properly; since it wasn't even in the make
+ files that came with it, I don't think gcc.exe 1.37.1 was intended
+ to be built for the Vax .. we'll see.
+
+ In case you're wondering, I could never get vmsgcc134 to work properly;
+that's why I did this with Vax C.
+
+ Good luck! This only worked under 5.3-1 (and the latest version of
+Vax C...3.0? 3.1?), and isn't guaranteed in any way shape or form. If
+you have stumbling blocks and think I may have come upon it during all
+of this, feel free to mail me at kehoe@scotty.dccs.upenn.edu.
+
+--
+Brendan Kehoe | Soon: brendan@cs.widener.edu
+For now: kehoe@scotty.dccs.upenn.edu | Or: bkehoe@widener.bitnet
+ Last resort: brendan.kehoe@cyber.widener.edu
+Brendan Kehoe | Soon: brendan@cs.widener.edu
+For now: kehoe@scotty.dccs.upenn.edu | Or: bkehoe@widener.bitnet
+Last resort: brendan.kehoe@cyber.widener.edu
+
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