WIP call vendor/configure and vendor/make to create libzmq.a

[AxelNennker]

Signed-off-by: Axel Nennker axel.nennker@telekom.de

I suggest to call zeromq's autogen.sh && configure && make to build libzmq.a

How to use this:

• clone the repository
  git clone --recursive https://github.com/AxelNennker/zeromq-src-rs
• cd
  cd zeromq-src-rs
• Install Android Studio if you haven't
  Please see https://developer.android.com/studio/
• set environment (on Ubuntu)

export HOST_TAG=linux-x86_64
export NDK=$HOME/Android/Sdk/ndk-bundle

• call cargo build
  ANDROID_API=28 PATH=$NDK/toolchains/llvm/prebuilt/linux-x86_64/bin:$PATH CC=$NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android28-clang CXX=$NDK/toolchains/llvm/prebuilt/linux-x86_64/bin/aarch64-linux-android28-clang++ cargo build --target=aarch64-linux-android
• the resulting library is in vendor/src/.libs/libzmq.a

Possible improvements:

• copy vendor code to OUT_DIR/vendor before configuring and building so that cargo clean removes everything built
• tell crate using this crate where the new static library is

[jean-airoldie]

Hi Axel,

Could you explain to me what problem using cmake causes that using make directly would solve?

From what I recall you were unable to cross-compile for android using cmake. Why not open an issue for that?

[AxelNennker]

Added WIP to the title of this PR.
I will follow openssl-rs's example and copy the source_dir to OUT_DIR
https://github.com/alexcrichton/openssl-src-rs/blob/master/src/lib.rs#L80
This way it gets removed when cargo clean is called.

Also integrate with testcrate again following openssl_rs's example.

[AxelNennker]

I now build from the testcrate to see who the src-crate is used.

Sub-problem is now that the cloned git submodule is not on the stable branch and the configure script is complaining about that.

--- stderr
configure: WARNING: You are building an unreleased version of 0MQ and asciidoc or xmlto are not installed.

Is that something you could change for the git submodule?

[jean-airoldie]

Yes the master branch uses a unreleased version for zmq. The latest_release branch tracks the lastest zmq stable release.

[AxelNennker]

I suggest to add the stable branch here as a submodule like described here.
https://stackoverflow.com/questions/1777854/how-can-i-specify-a-branch-tag-when-adding-a-git-submodule
Maybe even a fixed version (which would be needed to be updated from time to time)

[jean-airoldie]

Currently latest_release tracks the stable branch. However the stable branch is not a fixed version.

I'm not sure I understand your previous comment.

[AxelNennker]

I think that the submodule should be 'stable' not master.

cd zeromq-src-rs/vendor
git checkout stable
cd ..
git add zeromq-src-rs
git commit -m "moved src directory vendor to stable"
git push

This way the submodule directory 'vendor' contains the branch 'stable' when zeromq-src-rs is checked out.

[jean-airoldie]

The master branch mirrors libzmq's master branch. It is a preview branch.

The lastest_release mirros follows libzmq's lastest_release branch. This is a the stable branch.

Do you mean that you think either of these branches should be renamed?