VHDL 2008, DSP Builder and Quartus 10

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Or, if you want to make VHDL-2008 your default VHDL version for all your VHDL files, you can add the following line in your QSF:

set_global_assignment -name VHDL_INPUT_VERSION VHDL_2008

This can also be done in the GUI:

Assignments > Settings > Analysis & Synthesis Settings > VHDL Input

and choose "VHDL 2008" under VHDL Version.

However, do note that not all VHDL-2008 features have been implemented.

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this looks good for a Quartus II project, but i'm not sure that'll help in HDL Import in DSP Builder