diff -ru mysql-4.0.20/libmysql/Makefile.shared mysql-4.0.20-patched/libmysql/Makefile.shared
--- mysql-4.0.20/libmysql/Makefile.shared	2004-05-14 02:53:25.000000000 +0200
+++ mysql-4.0.20-patched/libmysql/Makefile.shared	2004-08-12 23:16:08.000000000 +0200
@@ -78,6 +78,7 @@
 			$(target)
 DEFS =			-DDEFAULT_CHARSET_HOME="\"$(MYSQLBASEdir)\"" \
 			-DDATADIR="\"$(MYSQLDATAdir)\"" \
+			-DSYSCONFDIR="\"$(sysconfdir)\"" \
 			-DSHAREDIR="\"$(MYSQLSHAREdir)\"" $(target_defs)
 
 # The automatic dependencies miss this
diff -ru mysql-4.0.20/mysys/Makefile.am mysql-4.0.20-patched/mysys/Makefile.am
--- mysql-4.0.20/mysys/Makefile.am	2004-05-14 02:53:28.000000000 +0200
+++ mysql-4.0.20-patched/mysys/Makefile.am	2004-08-12 23:15:46.000000000 +0200
@@ -64,6 +64,7 @@
 EXTRA_PROGRAMS =	
 DEFS =			-DDEFAULT_BASEDIR=\"$(prefix)\" \
 			-DDATADIR="\"$(MYSQLDATAdir)\"" \
+			-DSYSCONFDIR="\"$(sysconfdir)\"" \
 			-DDEFAULT_CHARSET_HOME="\"$(MYSQLBASEdir)\"" \
 			-DSHAREDIR="\"$(MYSQLSHAREdir)\"" \
                         @DEFS@
diff -ru mysql-4.0.20/mysys/default.c mysql-4.0.20-patched/mysys/default.c
--- mysql-4.0.20/mysys/default.c	2004-05-14 02:53:19.000000000 +0200
+++ mysql-4.0.20-patched/mysys/default.c	2004-08-12 23:15:39.000000000 +0200
@@ -50,8 +50,8 @@
 #else
 "/etc/",
 #endif
-#ifdef DATADIR
-DATADIR,
+#ifdef SYSCONFDIR
+SYSCONFDIR,
 #endif
 "",					/* Place for defaults_extra_dir */
 #if !defined(__WIN__) && !defined(__NETWARE__)