configure: warn if GCC 4.2 is being used
authorGanesh Ajjanagadde <gajjanagadde@gmail.com>
Wed, 26 Aug 2015 13:36:25 +0000 (09:36 -0400)
committerCarl Eugen Hoyos <cehoyos@ag.or.at>
Thu, 27 Aug 2015 14:56:34 +0000 (16:56 +0200)
The wiki, Ticket1464, and Ticket3970 warn about the usage of GCC 4.2.
This fixes Ticket3970.

Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>

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