Add Meson build system support

[lgrahl]

Adds Meson build system support. Tested with:

• Linux x64 (Arch, Ubuntu Trusty/Xenial/Bionic)
• Linux ARMv6 and ARMv7 (cross-compiled)
• Mac OS X Xcode 9.4 and Xcode 10.1
• Android API level 28 (cross-compiled)
• Windows x86 and x64 (cross-compiled via MinGW)
• Windows x86 and x64

[lgrahl]

Updated the previous post with my build results.

[tuexen]

@lgrahl MinGW support has been added by @weinrank . Can you check if your Meson build works on MinGW. It might be necessary to add something like 111e0ca to work around a gcc issue on Windows.

Let me know when you think this is ready to merge.

[lgrahl]

Will rebase and test again. 👍

[tuexen]

Will rebase and test again. 👍

Great, thanks.

[lgrahl]

Updated. Results are here (122-136), here and here.

This should be good to merge now. A couple of notes:

• Android builds only work with meson configure -Dsctp_build_programs=false since it does not support pthread_cancel. And there are a few warnings but nothing that raises any eyebrows.
• When building with MinGW, inet_pton was not available. I have resolved this by defining _WIN32_WINNT=0x601. You may want to copy this to the CMake and autotools variants.
• Building with MSVC on Windows only works with meson configure -Dsctp_build_programs=false or meson configure --default-library=static since usrsctp currently does not explicitly export symbols.

You can also take (and extend) my CI files of the meson-ci branch if you want to. I'd imagine continuous integration would greatly help in maintaining support for all platforms.

[tuexen]

Updated. Results are here (122-136), here and here.

This should be good to merge now. A couple of notes:

Merged. Thanks for providing it.

• Android builds only work with meson configure -Dsctp_build_programs=false since it does not support pthread_cancel. And there are a few warnings but nothing that raises any eyebrows.

OK. The test programs are not really intended to be used on Android. So this is acceptable.

• When building with MinGW, inet_pton was not available. I have resolved this by defining _WIN32_WINNT=0x601. You may want to copy this to the CMake and autotools variants.

@weinrank Do you observe the same problem? Why does defining _WIN32_WINNT=0x601 makes a difference? According to MSDN, the function is supported on Windows 8.1 and Vista. That doesn't fit to using 0x601, which is according to MSDN _WIN32_WINNT_WIN7.

• Building with MSVC on Windows only works with meson configure -Dsctp_build_programs=false or meson configure --default-library=static since usrsctp currently does not explicitly export symbols.

@weinrank Is this need on Windows? Should we do that?

You can also take (and extend) my CI files of the meson-ci branch if you want to. I'd imagine continuous integration would greatly help in maintaining support for all platforms.

@weinrank Any interest?