Debian official build system

I don't see anything obvious in MTR that could cause the difference between MySQL and MariaDB, the fragments of code that do the check for socket path length are identical.
If you could apply (temporarily!) the patch below, we might gather more information about what is going on. The patch itself cannot fix anything, it just adds more logging.

=== modified file 'mysql-test/lib/My/Platform.pm'

--- mysql-test/lib/My/Platform.pm	2011-06-30 15:37:13 +0000

+++ mysql-test/lib/My/Platform.pm	2014-02-20 10:51:00 +0000

@@ -120,6 +120,16 @@

   my $len = length($path) - length($tmpdir) - 1;

   my $testfile = $tmpdir . "/" . "x" x ($len  > 0 ? $len : 1);

   my $sock;

+  print("Trying to create socket with name $testfile\n");

+  if (-e $testfile) {

+    print("...but $testfile already exists\n");

+    if (-d $testfile) {

+      print("...and $testfile is a directory\n");

+    }

+    if (! -w $testfile) {

+      print("...and $testfile is not writable\n");

+    }

+  }

   eval {

     $sock= new IO::Socket::UNIX

       (

@@ -128,10 +138,10 @@

       );

     $truncated= 1; # Be negatvie

-    die "Could not create UNIX domain socket: $!"

+    print("Could not create socket\n") && die "Could not create UNIX domain socket: $!"

       unless defined $sock;

-    die "UNIX domain socket path was truncated"

+    print("Socket path was truncated to ".$sock->hostpath()."\n") && die "UNIX domain socket path was truncated"

       unless ($testfile eq $sock->hostpath());

     $truncated= 0; # Yes, it worked!

The reason of the failure is the debian bug
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=670722
A simple script using hostpath() reproduces it on kFreeBSD.

I couldn't understand why it passes with MySQL in the official build system. I cloned the git tree from git://git.debian.org/git/pkg-mysql/mysql-5.5.git, and they fail exact same way. Possibly during installation of dependencies some experimental package which fixes the bug is pulled, but it's just a guess. it's hard for me to reproduce the entire process, because apparently it uses some closed repositories (and besides currently i can't use unstable for kFreeBSD at all, it complains about hash sum mismatch at least on two different mirrors). In any case, it is a hypothetical question because the real solution is to get the upstream bug fixed.

This is still valid for 5.5.38:
https://buildd.debian.org/status/fetch.php?pkg=mariadb-5.5&arch=kfreebsd-amd64&ver=5.5.38-1&stamp=1405681151
https://buildd.debian.org/status/fetch.php?pkg=mariadb-5.5&arch=kfreebsd-i386&ver=5.5.38-1&stamp=1405684324

MySQL in Debian does however build (https://buildd.debian.org/status/package.php?p=mysql-5.5) on this architecture and I think we should get to the same level.

This MTR issue is now fixed with this patch http://anonscm.debian.org/cgit/pkg-mysql/mariadb-5.5.git/commit/?id=7a4997284b903cb281f9107a781fa2bf16ff7ac2 and verified in build log at https://buildd.debian.org/status/fetch.php?pkg=mariadb-5.5&arch=kfreebsd-amd64&ver=5.5.39-1&stamp=1407788422

However, MariaDB does not yet fully build on kfreebsd due to another error (auth_socket.so missing) but for that I'll open another issue.

Please copy the patch to MariaDB trunk and release the fix in upstream 5.5.40.