bash configure fails on missing VS tools dir

[Nir Lisker]

When trying to build JDK 11 on Windows 10 with VS Express 2013 Update 4 (as
stated in the docs - the highest supported version) the build fails:

bash configure  --with-tools-dir='C:\Program Files (x86)\Microsoft Visual
Studio 12.0\VC\bin'

...
configure: Found Visual Studio installation at /cygdrive/c/Program Files
(x86)/Microsoft Visual Studio 12.0/ using --with-tools-dir
configure: Warning: vc/bin/amd64/vcvars64.bat is missing, this is probably
Visual Studio Express. Ignoring
configure: Found Visual Studio installation at /cygdrive/c/Program Files
(x86)/ using --with-tools-dir
configure: Warning: vc/bin/amd64/vcvars64.bat is missing, this is probably
Visual Studio Express. Ignoring
configure: The path given by --with-tools-dir does not contain a valid
configure: Visual Studio installation. Please point to the VC/bin or
VC/bin/amd64
configure: directory within the Visual Studio installation
configure: error: Cannot locate a valid Visual Studio installation
configure exiting with result code 1

/Microsoft Visual Studio 12.0/VC/bin/ does not contain an /amd64 folder,
instead it has /x86_amd64. Also, vcvars64.bat is located directly under
/VC/bin.

Iv'e made another attempt using /Microsoft Visual Studio 11.0/VC/bin/ which
resulted in the same error. This folder also has vcvars64.bat directly
under it. It also contains an /amd64 folder with a couple of dlls inside.

Since I'm specifying the path to the /VC/bin dir I don't understand why
it's still complaining. What am I doing wrong?

On a related note, is it possible to update the build requirements to work
with VS 2017? OpenJFX already uses this version.

- Nir