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<H2><A NAME="SECTION00041000000000000000">
Requirements</A>
</H2>
The following elements are required to compile ClamAV:
<UL>
<LI>zlib and zlib-devel packages
</LI>
<LI>gcc compiler suite (tested with 2.9x, 3.x and 4.x series)
<BR> <SPAN CLASS="textbf">If you are compiling with higher optimization levels
than the default one (-O2 for gcc), be aware that there
have been reports of misoptimizations. The build system of ClamAV
only checks for bugs affecting the default settings, it is your
responsibility to check that your compiler version doesn't
have any bugs.</SPAN>
</LI>
</UL>
The following packages are optional but <SPAN CLASS="textbf">highly recommended</SPAN>:
<UL>
<LI>bzip2 and bzip2-devel library
</LI>
<LI>GNU MP 3
<BR>
It's very important to install the GMP package because it allows
<code>freshclam</code> to verify the digital signatures of the virus
databases and scripted updates. If freshclam was compiled without GMP
support it will display "SECURITY WARNING: NO SUPPORT FOR DIGITAL
SIGNATURES" on every update. You can download GNU MP at
<TT><A NAME="tex2html6"
HREF="http://www.swox.com/gmp/">http://www.swox.com/gmp/</A></TT>
<BR>
A note for Solaris/SPARC users: you must set the <SPAN CLASS="textit">ABI</SPAN> system
variable to 32 (e.g. <code>setenv ABI 32</code>) before running the
configuration script of GMP.
</LI>
<LI><code>check</code> unit testing framework <A NAME="tex2html7"
HREF="footnode.html#foot756"><SUP><SPAN CLASS="arabic">3</SPAN></SUP></A>.
</LI>
</UL>
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<ADDRESS>
Tomasz Kojm
2008-10-30
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