configure error after GCC update

[Ayush Tomar]

Hi,

I updated GCC from 4.7 to 4.9. Since then configure is failing with this
error:

checking if -lm is required for maths functions... configure: error: Failed
to link a C++ program using <cmath>
configure failed

Could someone tell what might be going wrong here and how to fix it?

Regards,
Ayush
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