OSVERSION

[Jeffrey Bouquet]

12.0-CURRENT r332797 GENERIC amd64
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make: "/usr/ports/Mk/bsd.port.mk" line 1171: Unable to
determine OS version. Either define OSVERSION, or 
install /usr/include/sys/param.h...
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then , with param.h in place 

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port builds, pkgdb -u, and  portsdb -u all fail with: 
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line 1200: UNAME_r (12.0-CURRENT) and OSVERSION (12.0-CURRENT) do not agree
on major version number.  
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Can I set that in sh or tcsh or zsh? 
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