Mesa 4.3.2 - Configure failure

[Matthieu Bonavita]

Hello, I need to install a package,which require SDL, which himself require Mesa3.4.2.
While installing this last one, I get a :

===>  Script "configure" failed unexpectedly.
      Please report the problem to sobomax at FreeBSD.org [maintainer] and attach
      the "/usr/ports/graphics/Mesa3/work/Mesa-3.4.2/config.log" including
      the output of the failure of your make command. Also, it might be a
      good idea to provide an overview of all packages installed on your
      system (e.g. an `ls /var/db/pkg`).
*** Error code 1

Stop in /usr/ports/graphics/Mesa3.

For information,I run a FreeBSD RELEASE 5.0 - p7.
I just updated today the ports collection, same effects, with Mesa3.4.2_2...
Attached files : Packages list, Config.log

If anybody has a clue ...
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