Compiling and Linking a C-Program for a 32-bit Architecture

So I'm working through an assignment for Stanford's CS107 course and I can't get past compiling 开发者_运维问答the unfinished program (project files and the original makefile can be found on the course page, I'm working on assignment 4 RSS.)

After much research, I think the problem is I'm using gcc on a 64-bit architecture (Mac OS 10.6) and the pre-compiled library code under assn-4-rss-news-search-lib/linux is for a 32-bit architecture. I tried setting gcc to use i386 and -m36, but nothings working and I'm kind of just guessing.

So here's the output I get when I run make:

gcc  -g -Wall -std=gnu99 -Wno-unused-function    -c -o rss-news-search.o rss-news-search.c
gcc  rss-news-search.o -g -Wall -std=gnu99 -Wno-unused-function -g  -lnsl -lrssnews -L/Users/derp/Documents/OCW/CS107/Work/programming4/assn-4-rss-news-search-lib/linux -o rss-news-search
ld: library not found for -lnsl
collect2: ld returned 1 exit status
make: *** [rss-news-search] Error 1

Here's the output I get when I remove -lnsl where architecture differences are mentioned:

gcc  -g -Wall -std=gnu99 -Wno-unused-function    -c -o rss-news-search.o rss-news-search.c
gcc  rss-news-search.o -g -Wall -std=gnu99 -Wno-unused-function -g  -lrssnews -L/Users/derp/Documents/OCW/CS107/Work/programming4/assn-4-rss-news-search-lib/linux -o rss-news-search
ld: warning: in /Users/derp/Documents/OCW/CS107/Work/programming4/assn-4-rss-news-search-lib/linux/librssnews.a, file was built for unsupported file format which is not the architecture being linked (x86_64)
Undefined symbols:
    "_URLConnectionDispose", referenced from:
        _ProcessFeed in rss-news-search.o
        _ParseArticle in rss-news-search.o
    ... several more undefined symbols mentioned ...
ld: symbol(s) not found
collect2: ld returned 1 exit status
make: *** [rss-news-search] Error 1

So I'm asking for any ideas on what I could do to resolve this. I've been at it for hours tweaking settings and Google'ing around to no avail.

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In case someone like me will be looking for answer after all this time passed... Problem is easy solved by installing wubi version of 32bit Ubuntu. It works fine on 64bit system. You only need to edit makefile so it knows where to look for the libraries provided.

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• I'm pretty sure that using a precompiled library for linux on macos, whatever the bitness, won't work (well, it is probably possible to cross-compile on MacOS for Linux and perhaps possible to run Linux executable in a compatibility box on MacOS, but that's quite different than what you are trying to do).

• libnsl is a standard library on Linux (it provides some networking related functions)