Windows编译mediapipe,C++之细节

mediapipe版本0.8.6

bazel版本，4.1.0

打开cmd，切换到mediapipe-0.8.6目录下，输入下面命令测试hello world

bazel build -c opt --define MEDIAPIPE_DISABLE_GPU=1 --action_env PYTHON_BIN_PATH="D:\\software\\major\\anaconda3\\python.exe" mediapipe/examples/desktop/hello_world

会弹出如下错误

Error: file '@bazel_tools//tools/cpp:toolchain_utils.bzl' does not contain symbol 'use_cpp_toolchain' (did you mean 'find_cpp_toolchain'?)

参考博客：
mediapipe bazel 编译问题_十橙的博客-CSDN博客

把

http_archive(
    name = "rules_cc",
    strip_prefix = "rules_cc-main",
    urls = ["https://github.com/bazelbuild/rules_cc/archive/main.zip"],
)

改为

_RULES_CC_GIT_COMMIT = "f95239adde29680236afa22b4abaf1d04234f61a"
http_archive(
    name = "rules_cc",
    strip_prefix = "rules_cc-%s" % _RULES_CC_GIT_COMMIT,
    urls = ["https://github.com/bazelbuild/rules_cc/archive/%s.tar.gz" % _RULES_CC_GIT_COMMIT],
)

之后，hello world编译成功

然后尝试编译

bazel build -c opt --define MEDIAPIPE_DISABLE_GPU=1 --action_env PYTHON_BIN_PATH="D:\\software\\major\\anaconda3\\python.exe" mediapipe/examples/desktop/iris_tracking:iris_tracking_cpu
set GLOG_logtostderr=1

出现下面错误

Error:mediapipe-0.8.6/third_party/BUILD:186:6: //third_party:opencv_binary depends on @windows_opencv//:opencv in repository @windows_opencv which failed to fetch. no such package '@windows_opencv//': The repository's path is "C:\opencv\build"

这是因为没有指定opencv3.4.10的路径，在WORKSPACE中指定opencv3.4.10的路径，如下所示

new_local_repository(
    name = "windows_opencv",
    build_file = "@//third_party:opencv_windows.BUILD",
    path = "D:\\software\\major\\opencv_3.4.10\\build",
)

再次编译，编译成功。

mediapipe0.8.6好像对bazel的版本有要求，试了bazel5.2.0和bazel3.7.2都不太行，根据搜索提示改为了bazel4.1.0，然后就成功了。