Fix Audio Buffering GUI setting not available for the FAudio backend

[Oschowa]

Also update FAudio to 19.10

[Nekotekina]

Well, it seems not compatible with Ubuntu 18.04 out of the box because it only has SDL 2.0.8 or something yet needs 2.0.9 to build. Probably need to add SDL version check in CMakeLists.txt.

[Oschowa]

Where do you see the failures, and do they only happen because of the update to faudio 19.10? It looks like the Travis bot succeeded?

[RipleyTom]

You may want to add
ignore = dirty

To the faudio submodule in .gitmodules so that it tracks only commit and not individual files.

[Nekotekina]

@Oschowa Travis didn't include FAudio I believe. AppImage doens't have FAudio.
Error happens on master, compiling FAudio_platform_sdl2.c
#pragma message("Please update to SDL 2.0.9 ASAP!")

[Nekotekina]

diff --git a/3rdparty/CMakeLists.txt b/3rdparty/CMakeLists.txt
index 5de99ee24..6dfd7d21a 100644
--- a/3rdparty/CMakeLists.txt
+++ b/3rdparty/CMakeLists.txt
@@ -342,7 +342,9 @@ set(FAUDIO_TARGET 3rdparty_dummy_lib)
 if(USE_FAUDIO)
        # FAudio depends on SDL2
        pkg_check_modules(SDL2 sdl2)
-       if(SDL2_FOUND)
+       if (NOT SDL2_FOUND OR SDL2_VERSION VERSION_LESS 2.0.9)
+               message("-- RPCS3: FAudio requires SDL 2.0.9 or newer.")
+       else()
                add_subdirectory(FAudio EXCLUDE_FROM_ALL)
                target_compile_definitions(FAudio INTERFACE -DHAVE_FAUDIO)
                set(FAUDIO_TARGET FAudio)

[Oschowa]

Made the changes, but i'm curious why travis would skip building the backend.
Although i guess it would be pointless anyways if it doesn't have SDL >= 2.0.9.