Linking standalone NASM binary with libc
jcm at FreeBSD-uk.eu.org
Tue Aug 30 10:44:03 GMT 2005
On Tue, Aug 30, 2005 at 01:37:02PM +0300, Giorgos Keramidas wrote:
: On 2005-08-30 04:29, Jonathon McKitrick <jcm at FreeBSD-uk.eu.org> wrote:
: > I'm doing some experimentation with assembly code based on the int80h.org
: > tutorials. But since I am going to use malloc and some other functions,
: > I need to make my code link with libc rather than stand totally on its own.
: > ld -s -o foo foo.o -lc
: > leaves 'environ' and '__progname' undefined. What is the correct way to link
: > standalone asm code with needed libraries?
: That depends on what the ``standalone'' code contains. If your foo.o
: object file defines a 'main' function, then you can just use cc(1):
This is the method I've been using until now. And maybe it's the best one. I
was just wondering, though, if I want to write an app that is linked to libc,
but doesn't have 'main', and has '_start' instead, and where I want to use ld
directly rather than indirectly through cc to link.
Hoppiness is a good beer.
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