Tensorflow 1.9 Bazel build error with Cuda on Windows - tensorflow

Question

I'm trying to compile a sample program which uses Tensorflow core, with CUDA support on Windows 10 64bit via Bazel on the following environments:
Windows 10 64 bit
CUDA Toolkit 9.0
CUDNN 9.0
Tensorflow 1.9
Bazel 0.16
I went through the configure.py successfully, I added the CUDA and the CUDNN location.
This is my Bazel BUILD file:
cc_binary(
name = "mnistpredict.dll",
srcs = ["mnist.cc", "MNIST.h"],
deps = [
"//tensorflow/core:tensorflow",
],
linkshared=1
)
I try to compile with this command:
bazel build //tensorflow/loadgraph:mnistpredict.dll
ERROR:
C:/users/laci/downloads/tensorflow-1.9.0/tensorflow/loadgraph/BUILD:1:1:
error loading package 'tensorflow/core': Encountered error while
reading extension file 'cuda/build_defs.bzl': no such package
'#local_config_cuda//cuda': Traceback (most recent call last):
File "C:/users/laci/downloads/tensorflow-1.9.0/third_party/gpus/cuda_configure.bzl",
line 1166
_create_local_cuda_repository(repository_ctx)
File "C:/users/laci/downloads/tensorflow-1.9.0/third_party/gpus/cuda_configure.bzl",
line 995, in _create_local_cuda_repository
_get_cuda_config(repository_ctx)
File "C:/users/laci/downloads/tensorflow-1.9.0/third_party/gpus/cuda_configure.bzl",
line 750, in _get_cuda_config
_cudnn_version(repository_ctx, cudnn_install_base..., ...)
File "C:/users/laci/downloads/tensorflow-1.9.0/third_party/gpus/cuda_configure.bzl",
line 466, in _cudnn_version
find_cuda_define(repository_ctx, cudnn_header_dir, "c...", ...)
File "C:/users/laci/downloads/tensorflow-1.9.0/third_party/gpus/cuda_configure.bzl",
line 422, in find_cuda_define
auto_configure_fail(("Error reading %s: %s" % (str(h...)))
File "C:/users/laci/downloads/tensorflow-1.9.0/third_party/gpus/cuda_configure.bzl",
line 210, in auto_configure_fail
fail(("\n%sCuda Configuration Error:%...)))
Cuda Configuration Error: Error reading
C:/Users/laci/Downloads/cudnn-9.0-windows10-x64-v7.1/cuda/include/cudnn.h:
java.io.IOException: ERROR:
src/main/native/windows/processes-jni.cc(239): CreateProcessW("grep"
--color=never -A1 -E "#define CUDNN_MAJOR" C:/Users/laci/Downloads/cudnn-9.0-windows10-x64-v7.1/cuda/include/cudnn.h):
The system cannot find the file specified.
and referenced by '//tensorflow/loadgraph:mnistpredict.dll' ERROR:
Analysis of target '//tensorflow/loadgraph:mnistpredict.dll' failed;
build aborted: Analysis failed INFO: Elapsed time: 1.612s INFO: 0
processes. FAILED: Build did NOT complete successfully (2 packages
loaded)
currently loading: tensorflow/core
When I try it without CUDA support, I can compile it successfully.

Answer 1

It was looking for grep.exe under %PATH% but failed. Either adding Git\bin to %PATH% or install grep for Windows will do the trick.
It had taken me several days to finally build a tensorflow-gpu 1.10 whl on Windows 7 64 bit with bazel + msys2.