おぉ、Apache 2.2 系列では
今の read.cgi は、そのままではコンパイルできないっぽい。

gcc -c read.c -I`apxs -q INCLUDEDIR` -O2 -Wall -funsigned-char -fPIC -DSNOWMAN -o read.o
In file included from read.c:1:
read.h:11:22: apr_date.h: No such file or directory
read.h:12:25: apr_file_io.h: No such file or directory
read.h:13:21: apr_lib.h: No such file or directory
read.h:14:25: apr_strings.h: No such file or directory
read.h:15:24: apr_tables.h: No such file or directory
read.h:16:22: apr_time.h: No such file or directory
read.h:20:22: apr_want.h: No such file or directory