x64 Link Issues - Can someone please help?

[Trey Brisbane]

On Saturday, 20 April 2013 at 04:46:45 UTC, dnewbie wrote:
>> phobos64.lib(dmain2_4ac_1a5.obj) : error LNK2019: unresolved
>> external symbol _Dmain referenced in function main
>
> Please add -L/DLL to the command line.

Ahhh ok, thanks! I assumed DMD would have detected the output 
file being a DLL and sent this itself, but clearly not.

In any case, the DLL now builds fine, however one of my other 
projects in the solution is also refusing to build but for a 
different reason.
Here is it's build output:

----------------------------------------------------------------------

Building: HookLoader (Debug|x64)

Performing main compilation...

C:\Development\Tools\ResourceCompiler\rc.exe /fo 
"obj\Debug\Resources.Win32Manifest.res" 
"C:\Development\Projects\EyefinityMaximizer\HookLoader\Resources\Win32Manifest.rc"

Current dictionary: 
C:\Development\Projects\EyefinityMaximizer\HookLoader

dmd.exe -debug -gc "obj\Debug\Resources.Win32Manifest.res" 
"C:\Development\Projects\EyefinityMaximizer\EyefinityMaximizer\eyemax\WinAPI.d" 
"main.d" "HookLoader.def"  
"-IC:\Development\Compilers\D\dmd2\src\phobos" 
"-IC:\Development\Compilers\D\dmd2\src\druntime\src" 
"-odobj\Debug" 
"-ofC:\Development\Projects\EyefinityMaximizer\bin\Debug\HookLoader.x64.exe" 
-m64

HookLoader.def(1) : warning LNK4017: EXETYPE statement not 
supported for the target platform; ignored

HookLoader.def(1) : warning LNK4017: SUBSYSTEM statement not 
supported for the target platform; ignored

    Creating library 
C:\Development\Projects\EyefinityMaximizer\bin\Debug\HookLoader.x64.lib 
and object 
C:\Development\Projects\EyefinityMaximizer\bin\Debug\HookLoader.x64.exp

LINK : fatal error LNK1123: failure during conversion to COFF: 
file invalid or corrupt

--- errorlevel 1123

Exit code 1123

Build complete -- 1 error, 0 warnings

----------------------------------------------------------------------

Any ideas as to what would cause a 'failure during conversion to 
COFF'??