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From:	"Christophe BARIBAUD" <cbaribau AT jnjfr DOT jnj DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Compiling and linking ASM and C++ files.
Date:	Fri, 1 Feb 2002 09:53:38 +0100
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Try
extern "C" void start();
to avoid C++ mangling

"Joel Saunders" <jbs30000 AT aol DOT com> a écrit dans le message news:
74ee5cc121b560fecbc3a4278528749b DOT 62691 AT mygate DOT mailgate DOT org...
> I've made projects before where I've successfully compiled and linked
> togeather multiple C++ files.  So I decided to try to do the same with
> one C++ file and an ASM file.  I was searching for examples of ASM files
> that used .intel_syntax and pretty much found only one.  So I used that
> example for my ASM file (.s file) and then made a C++ file that called
> the routine in the .s file.  The routine in the .s file doesn't work,
> but that's not important.  All I want to know, is why I get the errors
> I'm getting when Rhide goes to link the files togeather.  First I'll
> show .s file, then the .cpp file, and then the error.  Thanks in advance
> for your help.
> global _start
> .intel_syntax noprefix
>
> .section .text
> _start:
>
> mov eax, 4
> mov ebx, 1
> mov ecx, offset msg
> mov edx, msg_len
> int 0x80;
>
> xor eax, eax
> inc eax
> int 0x80
>
> .section .data
> msg: .ascii "Hello, from gas "
> msg_len = .-msg
>
> Now, the C++ Part:
> extern void start();
> main(void)
>

> start();
> return 0;
> }
>
> Now the errors:
>
> -[_]--------------------------- Message Window
> -------------------------4-[]-
> Creating: asm.exe
> Error: casmtest.o: In function `main':
> casmtest.cpp(4) Error: undefined reference to `start()'
> Error: casmtest.o(.eh_frame+0x11):casmtest.cpp: undefined reference to
> `__gxx_personality_v0'
> There were some errors
>
>
> --
> Posted via Mailgate.ORG Server - http://www.Mailgate.ORG

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