configure.ac issue

[Ken McDonell <kenj@xxxxxxxxxxxxxxxx>]

./configure: line 3943: test: too many arguments
./configure: line 3971: test: too many arguments
./configure: line 4011: test: too many arguments

lines like this ... in configure.ac are not syntactically correct, 
expecially when $cc_is_gcc appears to be undefined.
        test $cc_is_gcc -a "x$enable_ssp" != xno

Not sure where this worked, but probably needs guidance from Nathan as 
to the intent.