=== modified file 'build/percona-server.spec'
--- build/percona-server.spec	2013-06-03 01:41:20 +0000
+++ build/percona-server.spec	2013-06-05 16:06:47 +0000
@@ -555,7 +555,16 @@
 
 # ATTENTION: Parts of this are duplicated in the "triggerpostun" !
 
-mysql_datadir=%{mysqldatadir}
+# There are users who deviate from the default file system layout.
+# Check local settings to support them.
+if [ -x %{_bindir}/my_print_defaults ]
+then
+  mysql_datadir=`%{_bindir}/my_print_defaults server mysqld | grep '^--datadir=' | sed -n 's/--datadir=//p'`
+fi
+if [ -z "$mysql_datadir" ]
+then
+  mysql_datadir=%{mysqldatadir}
+fi
 # Check if we can safely upgrade.  An upgrade is only safe if it's from one
 # of our RPMs in the same version family.
 
@@ -709,7 +718,16 @@
 
 # ATTENTION: Parts of this are duplicated in the "triggerpostun" !
 
-mysql_datadir=%{mysqldatadir}
+# There are users who deviate from the default file system layout.
+# Check local settings to support them.
+if [ -x %{_bindir}/my_print_defaults ]
+then
+  mysql_datadir=`%{_bindir}/my_print_defaults server mysqld | grep '^--datadir=' | sed -n 's/--datadir=//p'`
+fi
+if [ -z "$mysql_datadir" ]
+then
+  mysql_datadir=%{mysqldatadir}
+fi
 NEW_VERSION=%{mysql_version}-%{release}
 STATUS_FILE=$mysql_datadir/RPM_UPGRADE_MARKER
 
@@ -760,7 +778,8 @@
 # ----------------------------------------------------------------------
 # Initiate databases if needed
 # ----------------------------------------------------------------------
-%{_bindir}/mysql_install_db --rpm --user=%{mysqld_user}
+%{_bindir}/mysql_install_db --rpm --user=%{mysqld_user} \
+    --datadir=$mysql_datadir
 
 # ----------------------------------------------------------------------
 # Upgrade databases if needed would go here - but it cannot be automated yet
@@ -889,7 +908,16 @@
 #   http://docs.fedoraproject.org/en-US/Fedora_Draft_Documentation/0.1/html/RPM_Guide/ch10s02.html
 # For all details of this code, see the "pre" and "post" sections.
 
-mysql_datadir=%{mysqldatadir}
+# There are users who deviate from the default file system layout.
+# Check local settings to support them.
+if [ -x %{_bindir}/my_print_defaults ]
+then
+  mysql_datadir=`%{_bindir}/my_print_defaults server mysqld | grep '^--datadir=' | sed -n 's/--datadir=//p'`
+fi
+if [ -z "$mysql_datadir" ]
+then
+  mysql_datadir=%{mysqldatadir}
+fi
 NEW_VERSION=%{mysql_version}-%{release}
 STATUS_FILE=$mysql_datadir/RPM_UPGRADE_MARKER-LAST  # Note the difference!
 STATUS_HISTORY=$mysql_datadir/RPM_UPGRADE_HISTORY