Error loading VISA framework into MATLAB (MacOS)

I am trying to load VISA (Mach-O executable) into MATLAB and I get the following errors. Another question on this community has answered how to deal with some of the errors but my main error is with compiling the thunkfile.

loadlibrary('/Library/Frameworks/VISA.framework/VISA','/Library/Frameworks/VISA.framework/Headers/visa.h','includepath','/Library/Frameworks/VISA.framework/Headers','mfilename','visaprototype.m')

 Warning: Warnings messages were produced while parsing.  Check the functions you intend to use for correctness.  Warning text
    can be viewed using:
     [notfound,warnings]=loadlibrary(...) 
    > In loadlibrary 
    Error loading library intermediate output follows.
    The actual error is at the end of this output.
    *********

    Failed to parse type 'union { char *__mbstate8; long long _mbstateL ; } __mbstate_t' original input 'union { char __mbstate8 [ 128 ]; long long _mbstateL ; } __mbstate_t'
    Found on line 86 of input from line 79 of file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/i386/_types.h    
    Type '__mbstate_t' was not found.  Defaulting to type error.

    Found on line 88 of input from line 81 of file /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk/usr/include/i386/_types.h
    Error parsing argument for function viQueryf function may be invalid.
    *********
    Error using loadlibrary
    Building VISA_thunk_maci64 failed.  Compiler output is:
    /usr/bin/xcrun -sdk macosx10.12 clang -I"/Library/Frameworks/VISA.framework/Headers"
    -I"/Applications/MATLAB_R2016b.app/extern/include" -fno-common -arch x86_64 -mmacosx-version-min=10.9 -fexceptions -isysroot
    /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.12.sdk
    -I"/Users/mathewsTHI/Documents/MATLAB" -I"/Library/Frameworks/VISA.framework/Headers" "VISA_thunk_maci64.c" -o
    "VISA_thunk_maci64.dylib" -bundle
    VISA_thunk_maci64.c:321:4: error: array type 'ViVAList' (aka '__builtin_va_list') is not assignable
            p2=*(ViVAList const *)callstack;
            ~~^
    VISA_thunk_maci64.c:339:4: error: array type 'ViVAList' (aka '__builtin_va_list') is not assignable
            p3=*(ViVAList const *)callstack;
            ~~^
    2 errors generated.

I know the VISA library is working because I am able to use it using Xcode. From the documentation on load library I understand that a thunk file is created for compatibility with a 64 bit architecture. However, the VISA library has two different architectures I can use. Will forcing load library to look at one architecture help? If so, how do I go about doing it?