staging failing on local Portfile for GCC 4.6.1

[doug livesey]

Hi -- I've been trying to install GCC 4.6.1 from the Portfile that someone
submitted to the ticket requesting that the port be updated, here:
https://trac.macports.org/ticket/29184
I've got it to the point where it is installing, but then it fails with
this:

--->  Computing dependencies for gcc46
--->  Fetching archive for gcc46
--->  Fetching gcc46
--->  Verifying checksum(s) for gcc46
--->  Extracting gcc46
--->  Configuring gcc46
--->  Building gcc46
--->  Staging gcc46 into destroot
Error: Target org.macports.destroot returned: xinstall: Cannot stat:
/Users/douglivesey/src/ports/lang/gcc46/files/mp-gcc46, No such file or
directory
Log for gcc46 is at:
/opt/local/var/macports/logs/_Users_douglivesey_src_ports_lang_gcc46/gcc46/main.log
Error: Status 1 encountered during processing.
To report a bug, see <http://guide.macports.org/#project.tickets>

I tried creating the
directory /Users/douglivesey/src/ports/lang/gcc46/files/mp-gcc46 and running
it again, but I got this error:

--->  Computing dependencies for gcc46
--->  Fetching archive for gcc46
--->  Fetching gcc46
--->  Verifying checksum(s) for gcc46
--->  Extracting gcc46
--->  Configuring gcc46
--->  Building gcc46
--->  Staging gcc46 into destroot
Error: Target org.macports.destroot returned: xinstall: Inappropriate file
type: /Users/douglivesey/src/ports/lang/gcc46/files/mp-gcc46
Log for gcc46 is at:
/opt/local/var/macports/logs/_Users_douglivesey_src_ports_lang_gcc46/gcc46/main.log
Error: Status 1 encountered during processing.
To report a bug, see <http://guide.macports.org/#project.tickets>

Can anyone advise me on how I might try to get the Portfile to succeed right
to the end?
I've been trying all night, and am going to bed, now, but if I could get up
tomorrow with some idea of how to proceed, that would make for a lovely
start to the weekend! :)
Thanks,
   Doug.
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