CrossWorks for MSP430 compiler support for Complex Numbers?

In Crossworks for MSP430 v3.1 it looks like you can find complex.h in the following default Windows install path:

C:/Program Files (x86)/Rowley Associates Limited/CrossWorks for MSP430 3.1/include\complex.h

I attempted to use it in a simple c file like below but got some compile errors which indicate that it doesn't recognize the _Complex type or the complex constant suffix "i".  Is there complex number support?  (or perhaps I'm not implementing it correctly?)

main.c

After running across a post from Paul Curtis at the bottom of the thread below indicating back in 2004 that he's work on supporting complex numbers in the MSP430 compiler, I was curious if there was any update on CrossWorks for MSP430 compiler support for _Complex and _Imag types?

https://www.embeddedrelated.com/showthread/msp430/8125-2.php