devel/cmake is confused

[John Klos <john%ziaspace.com@localhost>]

On NetBSD 7, on Amiga,

devel/cmake/work/cmake-3.5.2/Bootstrap.cmk/cmake_bootstrap.log:
cmake_bootstrap_14779_test.cxx:5:23: fatal error: iostream.h: No such file 
or directory
 # include <iostream.h>
                       ^
compilation terminated.

On NetBSD 7.99.33, on RPI3:

=> Tool dependency libtool-base>=2.2.6bnb3: found libtool-base-2.4.2nb10
=> Build dependency gcc2>=2.95.3nb7: NOT found
=> Verifying package-install for ../../lang/gcc2
=> Bootstrap dependency digest>=20010302: found digest-20121220
ERROR: This package is not available for these platforms: Darwin-*-* 
Interix-*-* *-*-x86_64 DragonFly-*-* NetBSD-[6789]*-*.
ERROR: This package has set PKG_SKIP_REASON:
ERROR: gcc2-2.95.3nb7 is not available for NetBSD-7.99.33-earmv7hf
*** Error code 1

John