zturner added a comment.

In https://reviews.llvm.org/D30991#702966, @zturner wrote:

> In https://reviews.llvm.org/D30991#702965, @thakis wrote:
>
> > When you say "cross-compiling", you mean targeting Windows while running on 
> > non-Windows, right? How do dlls get loaded there at all?
> >
> > Also, when does clang invoke link.exe? Normally on Windows the linker is 
> > invoked directly, no through the compiler driver. Are you using clang.exe 
> > instead of clang-cl.exe?
>
>
> I think he means "targeting x86 using an x64 toolchain", but yes, some 
> clarification would be helpful.  Also, which DLLs (specifically) are we 
> talking about?


A quick side-by-side comparison of two directories shows that the following 
files are missing from the x64_x86 cross compiler folder but are present in the 
x64_x64 folder:

atlprov.dll
CppCoreCheck.dll
d3dcompiler_47.dll
EspXEngine.dll
ExperimentalCppCoreCheck.dll
LocalESPC.dll
msobj140.dll
mspdb140.dll
mspdbcore.dll
mspdbst.dll
mspft140.dll
msvcdis140.dll
pgort140.dll

I then set up a cross compilation build environment using vcvarsall and the 
first two entries of my path are (in order):

  C:\Program Files (x86)\Microsoft Visual 
Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\bin\HostX64\x86
  C:\Program Files (x86)\Microsoft Visual 
Studio\2017\Professional\VC\Tools\MSVC\14.10.25017\bin\HostX64\x64

So it looks like this matches up with what he's saying.


https://reviews.llvm.org/D30991



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