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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) | 
					
						
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										 |  |  | <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> | 
					
						
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										 |  |  |      | 
					
						
							|  |  |  | </LI> | 
					
						
							|  |  |  | </UL> | 
					
						
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										 |  |  |     The following packages are optional but <SPAN  CLASS="textbf">highly recommended</SPAN>: | 
					
						
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										 |  |  |      | 
					
						
							|  |  |  | <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> | 
					
						
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										 |  |  | A note for Solaris/SPARC users: you must set the <SPAN  CLASS="textit">ABI</SPAN> system | 
					
						
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										 |  |  | 	variable to 32 (e.g. <code>setenv ABI 32</code>) before running the | 
					
						
							|  |  |  | 	configuration script of GMP. | 
					
						
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										 |  |  | </LI> | 
					
						
							|  |  |  | <LI><code>check</code> unit testing framework <A NAME="tex2html7" | 
					
						
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										 |  |  |   HREF="footnode.html#foot756"><SUP><SPAN CLASS="arabic">3</SPAN></SUP></A>. | 
					
						
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										 |  |  |      | 
					
						
							|  |  |  | </LI> | 
					
						
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