Bazel use tbb as a external dependency has a “Make” Variables not defined error about tbb.BUILD

[yuandcc]

Hello, when I use bazel build my project, I had a error "ERROR: external/tbb/BUILD.bazel:11:1: in cmd attribute of genrule rule @tbb//:build_tbb: $(AR) not defined". I try the update the tbb.BUILD follow the #2, but it not work. The details is in https://stackoverflow.com/questions/64022414/ . Do you know how can I set up it work? Thanks!

[rnburn]

Try replacing it with this version

genrule(
  name = "build_tbb",
  srcs = glob(["**"]) + [
    "@local_config_cc//:toolchain",
  ],
  cmd = """
         set -e
         WORK_DIR=$$PWD
         DEST_DIR=$$PWD/$(@D)
         cd $$(dirname $(location :Makefile))

         #TBB's build needs some help to figure out what compiler it's using
         if $$CXX --version | grep clang &> /dev/null; then 
           COMPILER_OPT="compiler=clang"
         else
           COMPILER_OPT="compiler=gcc"
         fi 

         # uses extra_inc=big_iron.inc to specify that static libraries are
         # built. See https://software.intel.com/en-us/forums/intel-threading-building-blocks/topic/297792
         make tbb_build_prefix="build" \
              extra_inc=big_iron.inc \
              $$COMPILER_OPT; \

         echo cp build/build_release/*.a $$DEST_DIR
         cp build/build_release/*.a $$DEST_DIR
         cd $$WORK_DIR
  """,
  outs = [
    "libtbb.a",
    "libtbbmalloc.a",
  ]  
)

cc_library(
    name = "tbb",
    hdrs = glob([
        "include/serial/**",
        "include/tbb/**/**",
        ]),
    srcs = ["libtbb.a"],
    includes = ["include"],
    visibility = ["//visibility:public"],
)

[yuandcc]

Thank you very much, it's work!
But I still have a question, Tensorflow-2.3.0 still uses the oldest version of tbb.BUILD, but the bazel version they declared in the .bazelversion file is already 3.1.0. Do you think they need to update tbb.BUILD to the latest one you provide ?