dosbox @ 0.74-6 Build fails with XCode 6.1 (with patch)

[NF6X (Mark J. Blair)]

After upgrading to Yosemite and XCode 6.1, dosbox failed to build with the following output:

...emulators/dosbox% sudo port install dosbox
Warning: All compilers are either blacklisted or unavailable; defaulting to first fallback option
--->  Computing dependencies for dosbox
[...]
--->  Configuring dosbox
Warning: All compilers are either blacklisted or unavailable; defaulting to first fallback option
[...repeated many times...]
--->  Building dosbox
Error: org.macports.build for port dosbox returned: command execution failed
Please see the log file for port dosbox for details:
    /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_emulators_dosbox/dosbox/main.log
[...]
Error: Processing of port dosbox failed

Log file included several instances of errors similar to this one:

:info:build ./core_dyn_x86/../../fpu/fpu_instructions_x86.h:1165:2: error: ambiguous instructions require an explicit suffix (could be 'filds', or 'fildl')

Applying the fpu.diff patch provided in ticket 40789 (attached for convenience) and removing the clang blacklist statement from the Portfile (new patch attached) allowed a clean build.

[NF6X (Mark J. Blair)]

Patch from ticket 40789

[NF6X (Mark J. Blair)]

Patch for Portfile to fix build problem