Re: Q: outb, outw et al?

Henning P. Schmiedehausen (hps@tanstaafl.de)
23 Aug 1998 15:33:22 +0200

judson@mcs.anl.gov (Ivan R. Judson) writes:

>Cool, thanks. This is what I've assumed, however I read somewhere about
>how to make these calls not appear as undefined symbols. I've lost track
>of where that is and can't seem to find it. Do you have another similarly
>succinct example for this?

Read the man page:

man outb

This family of functions is used to do low level port
input and output. They are primarily designed for inter-
nal kernel use, but can be used from user space, given the
following information in addition to that given in outb(9)

You compile with -O or -O2 or similar. The functions are
defined as inline macros, and will not be substituted in
without optimization enabled, causing unresolved refer-
ences at link time.

You must compile with -O or -O2

Kind regards
Henning

-- 
Dipl.-Inf. (Univ.) Henning P. Schmiedehausen --             hps@tanstaafl.de
TANSTAAFL! Consulting - Unix, Internet, Security      


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