Use pre-compiled third party library as a cc_library

[Liang Zou]

Hi,

I want to use pre-compiled third party library as a cc_library rule so that my binary can depend on it.

I'm using Mac, so I installed the library with "brew install gflags". Then I created a BUILD file for the library:

package(default_visibility = ["//visibility:public"])

cc_library(

    name = "gflags",

    srcs = [

      "lib/libgflags.dylib",

    ],

    hdrs = glob(["include/**/*.h"]),

    includes = ["include"],

)

The binary can be built, but when it runs, I got the exception: 

dyld: Library not loaded: /usr/local/opt/gflags/lib/libgflags.2.2.dylib

  Referenced from: /Users/liangzou/gitreview/bazel-bin/tools/viewer/omap_viewer

  Reason: image not found

I don't think I'm using the pre-compiled dynamic library correctly. Can someone please point out what the problem is? Thanks a lot in advance.

[Paul Johnston]

Just use it as an external dependency, no need to involve homebrew.

https://github.com/gflags/gflags/blob/master/INSTALL.md#using-gflags-with-bazel

[Liang Zou]

Thank you for your reply, Paul.

I'm just using gflags as an example. I just want to know in general, how to use pre-compiled libraries from homebrew as an dependency. Or is it possible?

[Paul Johnston]

You could use new_local_repository (https://www.bazel.io/versions/master/docs/be/workspace.html#new_local_repository), or if motivated, write your own homebrew_repository rule (https://www.bazel.io/versions/master/docs/skylark/repository_rules.html).

[Liang Zou]

I don't want to use local_repository because other coworkers will need to install the library.

What I want is a http_repository, so I can upload the pre-compiled libraries to a server.

Unfortunately, my question is still unsolved.

[xiongc...@gmail.com]

if my lib is not a bazel project,i haved compiled its dynamic library,how do I use this library

在 2016年12月1日星期四 UTC+8上午4:20:19，Paul Johnston写道：

[László Csomor]

https://docs.bazel.build/versions/master/be/c-cpp.html#cc_import


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