Enable Discord integration for Mac and Linux.

[hrydgard]

Fixes part of #11303

[unknownbrackets]

gcc: error trying to exec 'cc1obj': execvp: No such file or directory

That's odd. Maybe per StackOverflow this is some Travis issue?

For Mac:

/Users/travis/build/hrydgard/ppsspp/ext/discord-rpc/src/discord_register_osx.m:4:9: fatal error: 'AppKit/AppKit.h' file not found #import <AppKit/AppKit.h>

Maybe we're missing a framework?

-[Unknown]

[ExperiBass]

theres an apple downloads page, maybe this would help? https://developer.apple.com/download/more/?name=
I see the appkit thing, and that made me think of this page.

[unknownbrackets]

Actually, the issue is that we're using it on iOS for the AppKit thing - doesn't look like discord-rpc is compatible with iOS.

The Linux error is because it's trying to compile the Objective-C file:

gcc: error trying to exec 'cc1obj': execvp: No such file or directory
make[2]: *** [ext/discord-rpc-build/CMakeFiles/discord-rpc.dir/__/discord-rpc/src/discord_register_osx.m.o] Error 1
make[2]: *** Waiting for unfinished jobs....

So it seems like we just need to exclude the osx file on Linux and iOS?

-[Unknown]

[hrydgard]

Oh, oops. Should be pretty easy to fix both issues, will do soon

[hrydgard]

Surprise, it built! I'll merge tomorrow when all the buildbot lights should be green.

[ExperiBass]

The lights are green! XD