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From: Felix Buenemann <atmosfear AT users DOT sourceforge DOT net>
Reply-To: Felix DOT Buenemann AT gmx DOT de
To: cygwin AT cygwin DOT com
Subject: Porting problems with assembler
Date: Tue, 7 Aug 2001 22:23:02 +0200
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Hi.

I'm currently trying to port a program that makes heavy use of assembler 
(namely mplayer -> http://mplayerhq.hu), to win32 (and OpenBSD, where I have 
the same prob).

The problem is that on Linux/ELF I use extern functionname() in C code and 
functionname in external gas asm code, but if I try to link this on win32 (or 
OpenBSD/aout) external asm functions need a preceding underscore to link 
fine, so it must be extern functionname() in C and _functionname in assembler 
source.
No one could write a preprocessor definition in the form of:
#if defined(__CYGWIN__) || defined(__OpenBSD__)
#define ASMLINK(x) x
#else
#define ASMLINK(x) _##x
#endif

and then replace all functionname in asm source with _functionname and all 
functionname() in c source with ASMLINK(funtionname)(), but this is quite 
messy and as mplayer has lot's of external libraries that need to be kept on 
sync with external development this is a sort of no way.

So my question, are there any other ways to achieve this goal, best thing 
would be some assembler/compiler/linker/whatever option to resolve it.

Thanks!

-- 
Best Regards,
   Felix

____
Ever tried? Ever failed? - Try again! Fail better!

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