Index: makedefs
--- makedefs.orig	2006-07-03 20:30:00 +0000
+++ makedefs	2006-08-03 08:03:57 +0000
@@ -117,6 +117,26 @@
   FreeBSD.5*)	SYSTYPE=FREEBSD5
 		;;
   FreeBSD.6*)	SYSTYPE=FREEBSD6
+                  case "`uname -v`" in
+                  Gentoo*) SYSTYPE=LINUX2
+                          if [ -f /usr/include/db.h ]
+                          then
+                              : we are all set
+                          elif [ -f /usr/include/db4/db.h ]
+                          then
+                              CCARGS="$CCARGS -I/usr/include/db4"
+                          else
+                              # No, we're not going to try db1 db2 db3 etc.
+                              # On a properly installed system, Postfix builds
+                              # by including <db.h> and by linking with -ldb
+                              echo "No <db.h> include file found." 1>&2
+                              echo "Install the appropriate db*-devel package first." 1>&2
+                              echo "See the RELEASE_NOTES file for more information." 1>&2
+                              exit 1
+                          fi
+                          SYSLIBS="-ldb"
+                          ;;
+                  esac
 		;;
   OpenBSD.2*)	SYSTYPE=OPENBSD2
 		;;