Why do I receive errors when trying to build my model which has a diamondsystems AD/DA using xPC Target 5.2 (R2012a)?

When I try to build my model using the xpctarget.tlc system target file, I receive the following errors:

### Compiling test_data.c

cl -D_MT -MT /wd4996 /fp:precise /W3 /c /nologo /O2 /Oy- -DMODEL=test -DRT -DNUMST=2 -DTID01EQ=1 -DNCSTATES=0 -DMT=0 -DHAVESTDIO -DXPCMSVISUALC -DXPCCALLCONV=__cdecl -DUSE_RTMODEL -DERT_CORE test_data.c test_data.c

### Compiling xpc_datatype_ground.c

cl -D_MT -MT /wd4996 /fp:precise /W3 /c /nologo /O2 /Oy- -DMODEL=test -DRT -DNUMST=2 -DTID01EQ=1 -DNCSTATES=0 -DMT=0 -DHAVESTDIO -DXPCMSVISUALC -DXPCCALLCONV=__cdecl -DUSE_RTMODEL -DERT_CORE xpc_datatype_ground.c xpc_datatype_ground.c

### Compiling xpctarget.c

cl -D_MT -MT /wd4996 /fp:precise /W3 /c /nologo /O2 /Oy- -DMODEL=test -DRT -DNUMST=2 -DTID01EQ=1 -DNCSTATES=0 -DMT=0 -DHAVESTDIO -DXPCMSVISUALC -DXPCCALLCONV=__cdecl -DUSE_RTMODEL -DERT_CORE C:\PROGRA~1\MATLAB\R2012a\toolbox\rtw\targets\xpc\target\build\src\xpctarget.c xpctarget.c

### Linking ...

C:\PROGRA~1\MATLAB\R2012a\sys\perl\win32\bin\perl C:\PROGRA~1\MATLAB\R2012a\rtw\c\tools\mkvc_lnk.pl test.lnk test.obj rtGetInf.obj rtGetNaN.obj rt_logging.obj rt_logging_mmi.obj rt_matrx.obj rt_nonfinite.obj rt_printf.obj rtw_modelmap_utils.obj test_capi.obj test_data.obj xpc_datatype_ground.obj xpctarget.obj

link /NOLOGO /DLL /SUBSYSTEM:CONSOLE /DEF:xpcvcdll.def /Include:_malloc C:\PROGRA~1\MATLAB\R2012a\toolbox\rtw\targets\xpc\target\build\lib\libatlas.a C:\PROGRA~1\MATLAB\R2012a\toolbox\rtw\targets\xpc\target\build\lib\libcblas.a xpcruntime.lib @test.lnk @test_ref.rsp -out:test_xpc.dll

   Creating library test_xpc.lib and object test_xpc.exp

test.obj : error LNK2019: unresolved external symbol _addsmm16at，referenced in function _test

test.obj : error LNK2019: unresolved external symbol _dadsmm16at，referenced in function _test

test_xpc.dll : fatal error LNK1120: 2 unresolved externals

NMAKE : fatal error U1077: “"C:\Program Files\Microsoft Visual Studio 10.0\VC\BIN\link.EXE"”: return code“0x460” Stop.

The make command returned an error of 2