[Cmake] Problems finding programs on FreeBSD

[Richard Wackerbarth]

I have two questions :

(1) Which "make" should we find?

         It appears that present code prefers the GNU make to any native 
system make.
         Is this intentional?   If so, we need to add "gnumake" to the 
list of possible names.

         Personally, I would prefer to see the choice of  "make" prefer 
the native make and
         have the option for the project to request/demand the GNU 
version.

(2) Tcl has problems on "stock" FreeBSD installs.

        FreeBSD has chosen to install tclsh under a name like "tclsh8.3"
        However, they also install a stub program under the name "tclsh" 
which does not
        actually run the tcl shell, but issued a warning informing the 
user where he might
        find the desired command.

        Personally, I don't link that behavior and modify the install on 
my system so that "tclsh"
        is a link to the current version. But that is not "out of the 
box" (package install) behavior.

        Would it be bad to test for the named versions "tclsh8.4", 
"tcl84", etc. first and check for
        "tclsh" last?  Or would it be better to actually run a trivial 
test program to see if the shell
       actually works?

If there is some consensus, I'll be happy to develop patches to 
implement these behaviors.

Richard