Bugzilla Bug 117619

From my searches this bug appears similar to Bug #113712, however in my case
mono and monodevelop build and run correctly.  Nant appears to build correctly
and -v revealed no build USE flags.

for dev-dotnet/nant, dev-dotnet/nini, and dev-dotnet/mysql-connector-net
builds:
CFLAGS="-O2 -march=k8 -pipe"
CHOST="x86_64-pc-linux-gnu"

mono and monodevelop were built with -O3 compiler flags.

# emerge mysql-connector-net
<snip>
 * Applying mysql-connector-net-1.0.4-assembly.patch ...                       
                [ ok ]
>>> Source unpacked.
 * Generating a signed key ...                                                 
                [ ok ]

** (/usr/share/NAnt/bin/NAnt.exe:30456): WARNING **: Missing method .ctor in
assembly /usr/share/NAnt/bin/NAnt.exe, type
System.Runtime.CompilerServices.RuntimeCompatibilityAttribute

** ERROR **: Can't find custom attr constructor image:
/usr/share/NAnt/bin/NAnt.exe mtoken: 0x0a000056
aborting...
/usr/portage/dev-dotnet/mysql-connector-net/mysql-connector-net-1.0.4.ebuild:
line 28: 30456 Aborted                 nant -t:mono-1.0

# emerge nini
<snip>
>>> Unpacking Nini-1.0.0.zip to /var/tmp/portage/nini-1.0.0-r1/work
>>> Source unpacked.

** (/usr/share/NAnt/bin/NAnt.exe:31957): WARNING **: Missing method .ctor in
assembly /usr/share/NAnt/bin/NAnt.exe, type
System.Runtime.CompilerServices.RuntimeCompatibilityAttribute

** ERROR **: Can't find custom attr constructor image:
/usr/share/NAnt/bin/NAnt.exe mtoken: 0x0a000056
aborting...
/usr/portage/dev-dotnet/nini/nini-1.0.0-r1.ebuild: line 32: 31957 Aborted      
          nant ${myconf}

*** This bug has been marked as a duplicate of 113712 ***