Re: target/10743: Build error for CPP when building Cross compiler and host and target have diff character sets (i370)

Re: target/10743: Build error for CPP when building Cross compiler and host and target have diff character sets (i370)

[Dara Hazeghi]

The following reply was made to PR target/10743; it has been noted by GNATS.

From: Dara Hazeghi <dhazeghi@yahoo.com>
To: ivan@vmfacility.fr, gcc-bugs@gcc.gnu.org, gcc-gnats@gcc.gnu.org
Cc:  
Subject: Re: target/10743: Build error for CPP when building Cross compiler and host and target have diff character sets (i370)
Date: Tue, 13 May 2003 23:29:16 -0700

 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit- 
 trail&database=gcc&pr=10743
 
 Hello,
 
 looking at the "supported system" list for gcc, I see "This port is  
 very preliminary and has many known bugs.  We hope to have a  
 higher-quality port for this machine soon." Not very encouraging.  
 Still, if you want to pursue this bug, I suggest that you try out the  
 latest gcc cvs and see how it fairs. Neil Booth (our cpp maintainer)  
 has been doing a lot of work to make cpp more robust wrt character sets  
 and the like, and I suspect that if you try out mainline, and have  
 feedback to give him, he might be able to fix the issue. In any case,  
 3.2 branch is dead at this point, so you'll have to try a newer version  
 at some point anyway. Cheers,
 
 Dara
 

target/10743: Build error for CPP when building Cross compiler and host and target have diff character sets (i370)

[ivan]

>Number:         10743
>Category:       target
>Synopsis:       Build error for CPP when building Cross compiler and host and target have diff character sets (i370)
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon May 12 09:36:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Ivan Warren
>Release:        gcc 3.2.3
>Organization:
>Environment:
Host i686-linux, Target i370-ibm-mvs
>Description:
When attempting a cross compile build, cpp0 cannot be built because it is refereing to macro 'MVS_MAPCHAR' in cpplex.c which is mapped to mvs_map_char in gcc/config/i370.[ch] (which belongs in libbackend.a). Commenting out the ifdef/endif allows building the cpp, but resulting character constants are then ASCII (and not EBCDIC). My belief is that this will affect any attempt at creating a cross compiler when host and target need a backend specific character translator. I understand what I am attempting may not be supported, but this issue could affect any further attempts at building a clean cross compiler.
>How-To-Repeat:
../gcc-3.3.3/configure --target=i370-ibm-mvs --enable-languages=c
make

(note : the build errors I get on the C library are expected.. I am only interrested in the assembler output of the C compiler and do my own C Library - freestanding compiles, and my target is NOT a Un*x variant)..
>Fix:
I have no readilly available fix for this issue. The problem lies in the interdependance created by invoking MAP_CHARACTER from within cpplex.c which creates a dependance by cpplex.c for libbackend.a, while libbackend.a cannot be used on cpp0.
>Release-Note:
>Audit-Trail:
>Unformatted: