$ cd DB_File-1.807

$ vi config.in

# 1. Where is the file db.h?
#
# Change the path below to point to the directory where db.h is
# installed on your system.

INCLUDE = /opt/BerkeleyDB.4.1/include

#INCLUDE = /usr/local/BerkeleyDB/include
#INCLUDE = /usr/include

# 2. Where is libdb?
#
# Change the path below to point to the directory where libdb is
# installed on your system.

LIB = /opt/BerkeleyDB.4.1/lib

#LIB = /usr/local/BerkeleyDB/lib
#LIB = /usr/lib

3.4もあるけど，自分は変更しなかったので省略．
INCLUDE、LIBをBerkeleyDBをインストールした場所に変更する