[racket] 'C' module extension, expected `xxx'

Folks,

I'm having problems building a module extension, called "xxx"

I use the attached shell script to build the attached .c file, but when
the "racket" program (at the end of the shell script) is run, I get :

load-extension: expected module `xxx', but found module `xxx' in: 
[...]/compiled/native/x86_64-linux/3m/xxx_rkt.so

Everything is xxx!
What have I missed?

Help much appreciated.

Racket 5.2 (downloaded from website today) 3m linux x86_64

Thanks,

Tim

-- 
Tim Brown <tim.brown at cityc.co.uk>  | City Computing Limited            |
T: +44 20 8770 2110                | City House, Sutton Park Road      |
F: +44 20 8770 2130                | Sutton, Surrey, SM1 2AE, GB       |
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