Creation of the NO_SSP build knob

[Rui Paulo]

On Thu, Sep 04, 2008 at 02:46:53PM +0200, Jeremie Le Hen wrote:
> Hello,
> 
> There is currently a knob to enable/disable SSP: WITH_SSP or
> WITHOUT_SSP.  WITH_SSP is the default on -CURRENT, so no one had to put
> WITH_SSP= in src.conf(5).  This has hidden the following bug so far:
> 
> When buildworld is run with WITH_SSP= on command-line or in src.conf(5),
> it fails immediately with the following message, because the toolchain
> is built with WITHOUT_SSP:
> 
> % "/usr/src/share/mk/bsd.own.mk", line 365: WITH_SSP and WITHOUT_SSP can't both be set.
> 
> My leaning is to create an additional knob NO_SSP, much like
> NO_CPU_CFLAGS, that could be set internally.  However I'm not sure it
> complies with the src.conf(5) policy.  Any objection to the patch below?

We already have something like that.
WITHOUT_SENDMAIL= is expanded to MK_SENDMAIL=no.

You may want to do the same for SSP and keep the convention of the
variable names.