Re: i370 port

["Paul Edwards" <mutazilah@gmail.com>]

> GCC relies on the libiberty "pex" family of routines, which are
> much more narrow in scope, and have in fact been ported to several
> non-UNIX systems, including even MS-DOS.  Providing a port of "pex"
> to MVS should be much easier that porting a full Unix "system" or
> "fork" feature.

Ok.  But I don't even have much of system() yet.

> B.t.w. if you cannot execute sub-tasks at all, how does the
> MVS GCC invoke the preprocessor (I think this was still a
> separate process in 3.2) and the core compiler (cc1) from
> the compiler driver?   Do you even have a separate compiler
> driver?

Sleight of hand.  :-)

> #ifdef SINGLE_EXECUTABLE
>   int ret_code = 0;
> #endif
2836a2853,2872
> #ifdef SINGLE_EXECUTABLE
>      {
>          int cnt = 0;
>
>          while (commands[i].argv[cnt] != NULL)
>          {
>              cnt++;
>          }
>          if (strcmp(string, "cpp0") == 0)
>          {
>              ret_code = cpp(cnt, commands[i].argv);
>              if (ret_code != 0) break;
>          }
>          else if (strcmp(string, "cc1") == 0)
>          {
>              ret_code = toplev_main(cnt, commands[i].argv);
>              if (ret_code != 0) break;
>          }
>       }
> #else
2850c2886
<
---
> #endif
2853a2890,2892
> #ifdef SINGLE_EXECUTABLE
>     return (ret_code);


BTW, here's what I am going with:

C:\devel\gcc\gcc>cvs diff -r release-3_2_3 debug.c
Index: debug.c
===================================================================
RCS file: c:\cvsroot/gcc/gcc/debug.c,v
retrieving revision 1.1.1.1
diff -r1.1.1.1 debug.c
20a21,35
> #include "output.h"
> #include "flags.h"
>
> static void
> debug_source_line (line, text)
>      unsigned int line ATTRIBUTE_UNUSED;
>      const char *text ATTRIBUTE_UNUSED;
> {
>    if (flag_debug_asm)
>    {
>        app_enable();
>        fprintf(asm_out_file, "%s %d %s\n", ASM_COMMENT_START, line, text);
>        app_disable();
>    }
> }
34c49
<   debug_nothing_int_charstar, /* source_line */
---
>   debug_source_line,  /* source_line */


Thanks again for everyone's assistance.

Just need to find out who's emitting this warning:

C:\devel\gcc\gcc>gccmvs -DUSE_MEMMGR -Os -S -ansi -pedantic-errors -DHAVE_CONFIG
_H -DIN_GCC -DPUREISO -I ../../pdos/pdpclib -I . -I config/i370 -I 
../include -d
A world.c       -g
world.c:0: warning: `-g': unknown or unsupported -g option

and it'll be a wrap.  :-)

There will be some very happy people who are currently manually
putting in __asm__ lines to get insight.  :-)

BFN.  Paul.