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

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  1. POCompiling and Linking a C-Program for a 32-bit Architecture
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    <p>So I'm working through an assignment for Stanford's CS107 course and I can't get past compiling the unfinished program (project files and the <strong>original makefile</strong> can be <a href="http://see.stanford.edu/see/materials/icsppcs107/assignments.aspx" rel="nofollow">found on the course page</a>, I'm working on assignment 4 RSS.) </p> <p>After much research, I <em>think</em> the problem is I'm using gcc on a 64-bit architecture (Mac OS 10.6) and the pre-compiled library code under <code>assn-4-rss-news-search-lib/linux</code> 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.</p> <p>So here's the output I get when I run <code>make</code>:</p> <pre><code>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 </code></pre> <p>Here's the output I get when I remove <code>-lnsl</code> where architecture differences are mentioned:</p> <pre><code>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 </code></pre> <p>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.</p>
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    1. UStheabraham
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    1. COcan you compile c code period? Try writing hello world in c and trying to compile. I know that I've had some trouble with gcc and stdc lib on OSX so just make sure that's not it.
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      1. POCompiling and Linking a C-Program for a 32-bit Architecture
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    2. COUse `-m32` if the respective tools and backend are installed. But here the problem does not seem to be directly related to that issue from the error messages ...
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    3. COYeah, I've actually written a ton of code in C for this course, but apparently assignment 4 and 6 are trouble spots. Usually the Makefiles are provided and work fine, but they were written with Stanford's Linux/Solaris machines in mind for the real, attending students.
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