Make portaudio the default driver for non-Windows system, update deps

.github/actions/install_deps.sh

@@ -1,7 +1,7 @@
 case `echo $1 | cut -d '-' -f 1` in
         ubuntu)
                 sudo apt-get -qq update
-                sudo apt-get install -yq bison libpng-dev pkg-config libsdl2-dev
+                sudo apt-get install -yq bison libpng-dev pkg-config libsdl2-dev portaudio19-dev
                 (
                 cd `mktemp -d`
                 curl -L https://github.com/rednex/rgbds/archive/v0.4.0.zip > rgbds.zip
@@ -14,7 +14,7 @@ case `echo $1 | cut -d '-' -f 1` in
                 )
                 ;;
         macos)
-                brew install rgbds sdl2
+                brew install rgbds sdl2 portaudio
                 ;;
         *)
                 echo "Unsupported OS"

Makefile

@@ -37,7 +37,12 @@ endif
 VERSION := 0.12.3
 export VERSION
 CONF ?= debug
+
+ifeq ($(PLATFORM),windows32)
 SDL_AUDIO_DRIVER ?= sdl
+else
+SDL_AUDIO_DRIVER ?= portaudio
+endif
 
 BIN := build/bin
 OBJ := build/obj

README.md

@@ -37,8 +37,8 @@ SameBoy passes all of [blargg's test ROMs](http://gbdev.gg8.se/wiki/articles/Tes
 SameBoy requires the following tools and libraries to build:
  * clang
  * make
- * Cocoa port: OS X SDK and Xcode command line tools
+ * Cocoa frontend: OS X SDK and Xcode command line tools
- * SDL port: libsdl2
+ * SDL frontend: libsdl2, portaudio (Optional but recommended, set `SDL_AUDIO_DRIVER` to `sdl` to avoid)
  * [rgbds](https://github.com/bentley/rgbds/releases/), for boot ROM compilation
 
 On Windows, SameBoy also requires:
@@ -46,8 +46,8 @@ On Windows, SameBoy also requires:
  * [GnuWin](http://gnuwin32.sourceforge.net/)
  * Running vcvars32 before running make. Make sure all required tools and libraries are in %PATH% and %lib%, respectively.
 
-To compile, simply run `make`. The targets are `cocoa` (Default for macOS), `sdl` (Default for everything else), `libretro`, `bootroms` and `tester`. You may also specify `CONF=debug` (default), `CONF=release` or `CONF=native_release` to control optimization and symbols. `native_release` is faster than `release`, but is optimized to the host's CPU and therefore is not portable. You may set `BOOTROMS_DIR=...` to a directory containing precompiled `dmg_boot.bin` and `cgb_boot.bin` files, otherwise the build system will compile and use SameBoy's own boot ROMs.
+To compile, simply run `make`. The targets are `cocoa` (Default for macOS), `sdl` (Default for everything else), `libretro`, `bootroms` and `tester`. You may also specify `CONF=debug` (default), `CONF=release` or `CONF=native_release` to control optimization and symbols. `native_release` is faster than `release`, but is optimized to the host's CPU and therefore is not portable. You may set `BOOTROMS_DIR=...` to a directory containing precompiled `dmg_boot.bin` and `cgb_boot.bin` files, otherwise the build system will compile and use SameBoy's own boot ROMs. When compiling the SDL frontend, `SDL_AUDIO_DRIVER` can be set to either `sdl` or `portaudio`; the default driver is `sdl` for Windows and `portaudio` for every other platform.
 
-By default, the SDL port will look for resource files with a path relative to executable. If you are packaging SameBoy, you may wish to override this by setting the `DATA_DIR` variable during compilation to the target path of the directory containing all files (apart from the executable, that's not necessary) from the `build/bin/SDL` directory in the source tree. Make sure the variable ends with a `/` character.
+By default, the SDL frontend will look for resource files with a path relative to executable. If you are packaging SameBoy, you may wish to override this by setting the `DATA_DIR` variable during compilation to the target path of the directory containing all files (apart from the executable, that's not necessary) from the `build/bin/SDL` directory in the source tree. Make sure the variable ends with a `/` character.
 
 SameBoy was compiled and tested on macOS, Ubuntu and 32-bit Windows 7.