add OpenBSD support (again)

[jg1uaa]

Simply add Makefile.openbsd and modified some stuffs.

The difference from Linux:

• use PortAudio as default to support sndio interface
• no CM108 GPIO support

On OpenBSD, the path to bash is /usr/local/bin/bash not /bin/bash
so dw-start.sh needs to support both paths.

[wb2osz]

The "dev" branch now contains a combination of #92 and #191 for better BSD support. Rather than adding yet another Makefile, more conditions were added to Makefile.linux to reduce future maintenance effort.

[irl]

direwolf built with the Makefile.openbsd from this PR, but the output was not decodable and it also never decoded any packets generated by my VX-8. I didn't see that the dev branch has BSD stuff, so I can try that one and see if it's any better.

[wb2osz]

Maintaining 3 different Makefiles in parallel is a maintenance headache. Adding a 4th would make things worse.

The "dev" branch now contains a combination of #92 and #191 for better BSD support. Rather than adding yet another Makefile, more conditions were added to Makefile.linux to reduce future maintenance effort.

Ideally everything could be derived from a single multi-platform recipe but I don't want to go down the autoconf road. Too many bad experiences with it.

Someone is working on using “cmake” to solve the multi-platform problem. It has some issues but it but it looks promising.
https://github.com/ra1nb0w/direwolf/tree/cmake-dev

Can you give it a try and let me know about your experience? Thanks!

[irl]

Yeah, will give it a try. I agree that adding more Makefiles is not the answer.

[wb2osz]

No longer applicable. The 'dev' branch is now using cmake.

[wb2osz]

No longer applicable. The 'dev' branch is now using cmake.

[wb2osz]

Oops. Did i accidentally hit the reopen button?
No longer applicable. The 'dev' branch is now using cmake.