Update configure.ac

[traveller42]

Changed configure.ac to use subdir-objects

[traveller42]

This suppresses many warnings in my environment.

[traveller42]

Updating the m4 macros to the latest versions resulted in a clean run through configure on my Ubuntu 15.04 system.

[traveller42]

I think this completes the changes needed for the autotools to properly handle the multiarch Boost libraries and related pthreads support.

For the pthreads, I used the approach suggested in this message from the autoconf archive maintainers list.

This works correctly on my Ubuntu 15.04 system with no additional steps and no errors.
./setup_build.sh
cd build/opt
make

The specific changes should use whatever flags are created by the AX_PTHREAD macro. This should cover several build environments.

[mmueller65]

Thanks for Fuego patches. I have some questions.

• I updated to the most recent m4 macros, very similar to your 2nd patch. See -r 2022.
• Regarding adding subdir-objects, is it a matter of your personal preference, or does it break your build to not have it? Which system is this on? Note that our recommended way is to use separate build directories for each type of build, such as opt or dbg. See the setup-build.sh script to help with that.
• Regarding pthread, I believe this is already handled correctly by the current ax_boost_thread.m4 version. For your build, do you need both ax_pthread.m4 and ax_boost_thread.m4 ?

Martin

[traveller42]

I was reading commentary online looking for general responses to the errors I was seeing. The system was running Ubuntu 15.04 at the time. I'm now on 15.10 for that system and planning to upgrade to 16.04 soon. I have a 16.04 environment I can use, so I can look at that first.

The main system (currently on 15.10) has an AMD FX-8120 and 16 GB RAM. The other system is an old laptop with an Intel Core 2 Duo and 4 GB RAM. Both are running on 64-bit versions of Ubuntu.

With respect to opt and dbg, my goal was a clean build of the engine for testing. Once I had a clean build, I had what I needed for my project.

I'll need to check the current tip to see what I still need. After the other changes, I may not need anything.

[foosly]

hi,
current ax_boost_thread.m4 breaks my build with gcc 8.2.1 on linux because LD_FLAGS does not integrate "-pthread". Upgrading to m4 macros used in https://github.com/facebook/redex works for me.