From 5d0d6cb129f64bfaed2128d2bcc366aeee44e5ad Mon Sep 17 00:00:00 2001
From: Sergei Golubchik <sergii@pisem.net>
Date: Mon, 19 Jan 2015 16:28:58 +0100
Subject: [PATCH] MDEV-7294 MTR does not use /dev/shm with a out-of-source
 build

mtr internally does the following:
1. $default_vardir=....
2. $opt_vardir=$default_vardir unless $opt_vardir;
3. $opt_vardir=realpath $opt_vardir unless IS_WINDOWS
4. if ($opt_vardir eq $default_vardir) { .... use /dev/shm ... }

thus we have to realpath $default_datadir too, otherwise
the comparison logic might be broken
---
 mysql-test/mysql-test-run.pl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/mysql-test/mysql-test-run.pl b/mysql-test/mysql-test-run.pl
index daf9c6744da..ce07866ff9f 100755
--- a/mysql-test/mysql-test-run.pl
+++ b/mysql-test/mysql-test-run.pl
@@ -1494,6 +1494,7 @@ sub command_line_setup {
   {
     $default_vardir= "$glob_mysql_test_dir/var";
   }
+  $default_vardir = realpath $default_vardir unless IS_WINDOWS;
 
   if ( ! $opt_vardir )
   {