[CMake] Can't build cmake 2.8.1 out of source

[Brad King]

j s wrote:
> So if I remove /opt/local/bin from my path, but use /opt/local/bin/cmake
> (Macports) to build, it will work.
> 
> The compiler found is /usr/bin/gcc when /opt/local/bin/ is not in my
> path.  In our group we typically symlink /opt/local/bin to gcc-mp-4.3,
> which may be causing the conflict.  I do know that, at least in the
> past, that cmake will use /usr/bin/c++ instead of /opt/local/bin/g++.
> 
> Attached is the file you requested.  My only guess is that either the
> compiler or other Macports tool is problematic.

The FundamentalTypes.h ends up with this:

> /* The size of fundamental types.  Types that do not exist have size 0.  */
> #define cmsys_SIZEOF_CHAR 1
> #define cmsys_SIZEOF_SHORT __SIZEOF_SHORT__
> #define cmsys_SIZEOF_INT __SIZEOF_INT__
> #define cmsys_SIZEOF_LONG __SIZEOF_LONG__
> #define cmsys_SIZEOF_LONG_LONG __SIZEOF_LONG_LONG__
> #define cmsys_SIZEOF___INT64 0
[snip]
> #if cmsys_SIZEOF_INT == 4

but the #if fails.  Somehow the compiler used to detect the
availability of macros like __SIZEOF_INT__ and the compiler
used to actually compile later are behaving differently.