$ cd snort-2.4.3
$ patch -p1 < ../snort-2.4.3-clamonly.diff
$ find . -name \*.rej
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$ libtoolize -f && aclocal -I ./m4 && autoheader && automake && autoconf
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$ ./configure --help | grep -i clam
  --enable-clamav          Enable the clamav preprocessor
  --with-clamav-includes=DIR   clamav include directory
  --with-clamav-defdir=DIR   clamav virusdefinitions directory
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preprocessor clamav: ports all !22 !443 !993 !995
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preprocessor clamav: toclientonly
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preprocessor clamav: action-reset
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preprocessor clamav: dbdir /opt/clamav/share, dbreload-time 86400
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preprocessor clamav: file-descriptor-mode, descriptor-temp-dir /var/tmp/clamav
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# mount -t tmpfs tmpfs /var/tmp/clamav -o size=256M
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tmpmfs="YES"
tmpsize="256m"
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$ nc -l 65535 < clam.cab
