Audio library availability is checked, and corresponding options are disabled when unavailable.

Sources/Audio/ALDevice.cpp

@@ -692,6 +692,16 @@ namespace spades {
 			
 		}
 		
+		
+		bool ALDevice::TryLoad() {
+			try {
+				al::Link();
+				return true;
+			}catch(...){
+				return false;
+			}
+		}
+		
 		ALDevice::~ALDevice() {
 			SPADES_MARK_FUNCTION();
 			

Sources/Audio/ALDevice.h

@@ -39,6 +39,8 @@ namespace spades {
 			ALDevice();
 			virtual ~ALDevice();
 			
+			static bool TryLoad();
+			
 			virtual client::IAudioChunk *RegisterSound(const char *name);
 			
 			virtual void SetGameMap(client::GameMap *);

Sources/Audio/YsrDevice.cpp

@@ -218,6 +218,18 @@ namespace spades {
 			}
 		}
 		
+		bool YsrDevice::TryLoadYsr() {
+			try {
+				if(!library){
+					library = new spades::DynamicLibrary(s_ysrDriver.CString());
+					SPLog("'%s' loaded", s_ysrDriver.CString());
+				}
+				return true;
+			}catch(...){
+				return false;
+			}
+		}
+		
 		YsrDriver::~YsrDriver() {
 			ctx.Destroy();
 		}

Sources/Audio/YsrDevice.h

@@ -56,6 +56,8 @@ namespace spades {
 		public:
 			YsrDevice();
 			
+			static bool TryLoadYsr();
+			
 			virtual client::IAudioChunk *RegisterSound(const char *name);
 			
 			virtual void SetGameMap(client::GameMap *);

Sources/Gui/StartupScreenHelper.cpp

@@ -24,6 +24,8 @@
 #include <Core/Settings.h>
 #include <algorithm>
 #include <cctype>
+#include <Audio/YsrDevice.h>
+#include <Audio/ALDevice.h>
 
 #include "../Imports/OpenGL.h" //for gpu info
 #include "../Imports/SDL.h"
@@ -84,6 +86,39 @@ namespace spades {
 		void StartupScreenHelper::ExamineSystem() {
 			SPADES_MARK_FUNCTION();
 			
+			// check audio device availability
+			// Note: this only checks whether these libraries can be loaded.
+			
+			SPLog("Checking YSR availability");
+			if(!audio::YsrDevice::TryLoadYsr()) {
+				incapableConfigs.insert
+				(std::make_pair
+				 ("s_audioDriver",
+				  [](std::string value) -> std::string {
+					  if(EqualsIgnoringCase(value, "ysr")) {
+						  return "YSR library couldn't be loaded.";
+					  }else{
+						  return std::string();
+					  }
+				  }));
+			}
+			
+			SPLog("Checking OpenAL availability");
+			if(!audio::ALDevice::TryLoad()) {
+				incapableConfigs.insert
+				(std::make_pair
+				 ("s_audioDriver",
+				  [](std::string value) -> std::string {
+					  if(EqualsIgnoringCase(value, "openal")) {
+						  return "OpenAL library couldn't be loaded.";
+					  }else{
+						  return std::string();
+					  }
+				  }));
+			}
+			
+			// FIXME: check OpenAL availability somehow
+			
 			// check GL capabilities
 			
 			SPLog("Performing ecapability query");