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Subject: Re: Issues using DJGPP with Rust
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Le lundi 27 avril 2020 21:02:22 UTC+2, nona DOT  DOT  DOT  AT gmail DOT com a écrit :
> On Monday, April 27, 2020 at 1:33:59 PM UTC-4, Sébastien GUILLAUME wrote:
> > Hi, nice idea.
> > I have read your conversation in github. 
> > Can you post here the result of the file command applied to files you try to link?
> > Remember that djgpp use coff format, which is different from PE for Windows and different to elf to.
> > PE is descendent of coff, they have some common parts. Weird functions address can come from here.
> 
> I ran it on one of the object files for my program and this is what I got.
> 
> dos32-dcb1f62a4632e187.dos32.frqh9yy0-cgu.0.rcgu.o: Intel 80386 COFF object file,
> not stripped, 4 sections, symbol offset=0x234, 15 symbols

wich compiler made this files ?

I don't know how to switch to nightly rust, gentoo doesn't give rustup package, so I can't build the rust part.

This is what I gave when I try to compile startup.c with this command line :
$ i586-pc-msdosdjgpp-gcc -c startup.c -o startup.o
$ file startup.o
startup.o: Intel 80386 COFF object file, no line number info, not stripped, 5 sections, symbol offset=0x19c, 16 symbols 
$ i586-pc-msdosdjgpp-strings -tx startup.o
     14 .text
     3c .data
     64 .bss
     8c .comment
    11c GCC: (GNU) 7.2.0
    19c .file
    1ae startup.c
    1c0 .text
    1e4 .data
    208 .bss
    22c .comment
    274 _main
    298 _exit
    2c0 .eh_frame
    2ca .eh_frame
    2d4 ___djgpp_nearptr_enable
    2ec _rust_main

We can see that we have different number of section and symbols. It can be something interesting.

What do you have with your tools?

To realise my test, I used : 
- GNU Binutils 2.29
- GCC 7.2.0
- file-5.37
- rustc 1.41.1
- cargo 1.41.0