1. Copy mod_mysql_accesslog.c into the src directory.

2. Apply the autotools patch:

patch -p1 < lighttpd-1.4.33.patch

3. Run the following command to regenerate configure script:
./autogen.sh

4. Run the following commands in the base directory of lighttpd:

./configure --with-mysql ...
make clean
make
make install

5. Create the database table

CREATE TABLE accesslog (
  remote_host int(10) unsigned,
  remote_user varchar(2048),
  timestamp int(10) unsigned,
  request_line varchar(2048),
  status smallint(5) unsigned,
  bytes_body int(10) unsigned,
  header varchar(2048),
  environment varchar(2048),
  filename varchar(2048),
  request_protocol enum('VERSION_1_0','VERSION_1_1'),
  request_method enum('GET','POST','HEAD','OPTIONS','PROPFIND','MKCOL','PUT','DELETE','COPY','MOVE','PROPPATCH','REPORT','CHECKOUT','CHECKIN','VERSION_CONTROL','UNCHECKOUT','MKACTIVITY','MERGE','LOCK','UNLOCK','LABEL','CONNECT'),
  server_port smallint(5) unsigned,
  query_string varchar(2048),
  time_used smallint(5) unsigned,
  url varchar(2048),
  server_name varchar(2048),
  http_host varchar(2048),
  keep_alive tinyint(3) unsigned,
  bytes_in int(10) unsigned,
  bytes_out int(10) unsigned,
  response_header varchar(2048)
)

5. Apply the following configuration to your lighttpd.conf

# MySQL Accesslog authentification
mysql-accesslog.user = "peter"
mysql-accesslog.pass = "secret"

# MySQL database
mysql-accesslog.data = "pipe"
# MySQL socket or host
mysql-accesslog.sock = "/tmp/mysql.sock"
#mysql-accesslog.host = "192.168.10.100"

# MySQL query to be executed
mysql-accesslog.query = "INSERT INTO accesslog SET remote_host=%h, timestamp=%t, status=%s, header=%{User-Agent}i, query_string=%q, url=%U"