🚀 go-pugleaf

GCC-VERSION: 2.7.2
HOST: Linux-i386 (1.2.12)
TARGET: i386-unknown-coff

CONFIGURED-AS-FOLLOWS:
${SRCDIR}/gcc-2.7.2/configure --prefix=/usr/local \
                --target=i386-unknown-coff --host=i486-unknonw-linux \
                --nfp --with-gnu-as --with-gnu-ld \
                --program-suffix=386

PATCHES-APPLIED-TO-THE-ORIGINAL-SOURCE:
The crossgcc-patch from cygnus.
The patch is available in ftp.cygnus.com:/pub/embedded/crossgcc.


PROBLEM:
Preprocessor does not define the __*_PREFIX__ macros correctly.

SAMPLE:
-%<- x.c -------------
>__USER_LABEL_PREFIX__<
>__REGISTER_PREFIX__<
>__IMMEDIATE_PREFIX__<
-%<-------------------

produces this result when compiled with `gcc386 -E x.c >x.i':

-%<- x.i -------------
# 1 "x.c"

><
><
><
-%<-------------------

The correct result should be:

-%<- x.i -------------
# 1 "x.c"

> <
> %<
> $<
-%<-------------------


MY FIX FOR THIS:
I added the following lines to `config/i386/i386-coff.h'
-%<- x.i -------------
*** i386-coff.h~	Thu Jun 15 15:45:51 1995
--- i386-coff.h	Wed Jan  1 16:19:07 1997
***************
*** 31,36 ****
--- 31,67 ----
  #undef DBX_DEBUGGING_INFO
  #define SDB_DEBUGGING_INFO
  
+ 
+ /* COFF symbols don't start with an underscore.  */
+ 
+ #undef USER_LABEL_PREFIX
+ #define USER_LABEL_PREFIX ""
+ 
+ /* Use a prefix for local labels, just to be on the save side.  */
+ 
+ #undef LOCAL_LABEL_PREFIX
+ #define LOCAL_LABEL_PREFIX "."
+ 
+ /* Use a register prefix to avoid clashes with external symbols (classic
+    example: `extern char PC;' in termcap).  */
+ 
+ #undef REGISTER_PREFIX
+ #define REGISTER_PREFIX "%"
+ 
+ /* Immediates start with a $ sign. At least for gas. */
+ 
+ #undef IMMEDIATE_PREFIX
+ #define IMMEDIATE_PREFIX "$"
+ 
+ 
+ /* In the machine description we can't use %R, because it will not be seen
+    by ASM_FPRINTF.  (Isn't that a design bug?).  */
+ 
+ #undef REGISTER_PREFIX_MD
+ #define REGISTER_PREFIX_MD "%%"
+ 
+ 
+ 
  /* Support the ctors and dtors sections for g++.  */
  
  #define CTORS_SECTION_ASM_OP	".section\t.ctors,\"x\""
-%<-------------------

Though, I'm not sure wether there are other side-effects from this
solution, and it will not cure the other i386 targets (at least my
native Linux compiler has the same problem, and does not use coff).


Stefan Althoefer

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