As of release 0.2.4259-beta7, libopenmpt now also provides autotools based tarballs.

Thank you for implementing this!

I found three differences to the non-autotools version of beta7:

The example source code is installed into "share/doc/libopenmpt" instead of "share/doc/libopenmpt/examples".

The library is now a libtool library (thank you!) called libopenmpt while before I got plain "openmpt.a" (no lib). libtool is better, I just wonder why it wasn't called libopenmpt.a before.

libopenmpt_modplug.so is not installed with the autotools version.

"The library is now a libtool library (thank you!) called libopenmpt while before I got plain "openmpt.a" (no lib). libtool is better, I just wonder why it wasn't called libopenmpt.a before."

This was just a bug in the makefile. Fixed and renamed to libopenmpt.a.

"libopenmpt_modplug.so is not installed with the autotools version."

As of r4265, the Makefile now does not install libopenmpt_modplug by default either. It gets installed with a separate target now: 'make install-openmpt-modplug'.
I also added --enable-libopenmpt_modplug (which installs a libopenmpt_modplug) and --enable-libmodplug (which installs a replacement library for libmodplug (use with extreme caution, I do not consider the emulation of the libmodplug interface complete or stable; and I also do not expect to ever have a full emulation as libmodplug exposes lots of internal implementation details to applications). Both are not enabled by default as they are not required for normal libopenmpt usage, they just emulate the interface of libmodplug for applications that do not support libopenmpt directly.

Autotools-based build was broken since r4099.
Should now work again in r4376.
And our tests will now catch it if this kind of breakage should happen again in the future.

Should be all fixed and working now, in the libopenmpt 0.2-beta9 release.