[Nasm-users] Re: [Nasm-devel] 2 Problems: (Strange Linking Problem) && (Strange Syntatx Error)

[H. P. A. <hp...@zy...>]

H. Peter Anvin wrote:
> anonymous coward wrote:
> 
>>> 1: *Strage Linking Problem*
>>
>> I'm not a Linux/GCC expert. But in the first case
>> your code becomes start(), whereas in the second
> 
> 
> _start() actually; ELF doesn't use an extra underscore.
> 

N.B. For those that may not be familiar: some ABIs use a convention to 
preface C-language identifiers with underscores (_), in order to make 
identifiers generated by the compiler invisible to C.  That would, 
however, make the dlsym() function awkward to use; instead ELF leaves C 
identifiers as-is, and identifiers that are supposed to be invisible to 
C instead contain a dot (.) somewhere.

It is, however, common on ELF systems for FORTRAN symbols to be lower 
case and contain a *trailing* underscore, for example the FORTRAN 
subroutine "BLUTTAN" would become "bluttan_" on a typical ELF system, 
and would frequently be callable from C as bluttan_().

	-hpa