can't write to /var/folders

[Robert Broome]

I broke my install. :(
I use gfortran installed via macports. I am currently at gcc46, with gcc45 installed to support fortran-netcdf.

When I try to compile a simple program (which has compiled on this machine several days ago), I get:
gfortran -o sorttest sorttest.f95
f951: fatal error: can’t open /var/folders/p8/s7gtynwj7_x___mlswzr7sp80000gn/T//ccnZNOg5.s for writing: Permission denied
compilation terminated.

I don't know the implications of:

/T//filename 
I don't see how one even creates that.


Obviously there is a permission problem. 
/var/folders/p8 is owned by root.
drwxr-xr-x  5 rbroome  staff  170 Dec 25 20:53 s7gtynwj7_x___mlswzr7sp80000gn/p8   is owned by user (me).
directory p8 contains:
drwxr-xr-x  2 rbroome  staff   68 Dec 25 20:53 0   (this is a numeric 0, not a text O)
drwx------  8 rbroome  staff  272 Dec 25 21:00 C
drwx------  8 rbroome  staff  272 Dec 25 20:55 T

the contents of T is:
ll  /var/folders/p8/s7gtynwj7_x___mlswzr7sp80000gn/T/
total 8
drwx------@ 2 rbroome  staff   68 Dec 25 20:47 Cleanup At Startup
drwx------@ 3 rbroome  staff  102 Dec 25 20:56 com.apple.TextEdit
drwx------@ 3 rbroome  staff  102 Dec 25 20:53 com.apple.mail
-rw-------  1 rbroome  staff   59 Dec 25 20:23 xcrun_db

Can anyone give me a suggestion on what to do to solve this compile error?

thanks
rbroome