Steps to Reproduce

1. Open x86 native Command Prompt from Visual Studio 2017.5 Community ( 15.5 )
   mkbundle call only wrong x64 bit clang.exe and x64 cl.exe
2. It compiles failed because mkbundle doesn't work for process with x86-clang and x86-cl
3. Output is "failed"

Please fix mkbundle if mono works under architecture x86 ( not using x64 ) If I use x86 native Command prompt and it calls only clang.exe from x64 and cl.exe from x64.

I hate to edit manuell with gedit ( windows ) and clang.exe from x86 to prompt and and cl.exe from x86 prompt.

PS: Why do you forget to add "zlib.lib" in mkbundle.exe if you use "-z" Did you forget? Please check mkbundle.cs where is -z -> zlib.lib in cl.exe?

Using Mono:
Mono from today github
Mono x86, 5.11.0 without boehm ( I have compiled with Cygwin x64 )

Using OS:
Only WIndows [ x ]

Thanks!