update OpenAL-Soft to 1.24.3.

libs/openal-soft/common/opthelpers.h

@@ -28,6 +28,24 @@
 #define NOINLINE
 #endif
 
+#if defined(__MINGW32__) && defined(__i386__)
+/* 32-bit MinGW targets have a bug where __STDCPP_DEFAULT_NEW_ALIGNMENT__
+ * reports 16, despite the default operator new calling standard malloc which
+ * only guarantees 8-byte alignment. As a result, structs that need and specify
+ * 16-byte alignment only get 8-byte alignment. Explicitly specifying 32-byte
+ * alignment forces the over-aligned operator new to be called, giving the
+ * correct (if larger than necessary) alignment.
+ *
+ * Technically this bug affects 32-bit GCC more generally, but typically only
+ * with fairly old glibc versions as newer versions do guarantee the 16-byte
+ * alignment as specified. MinGW is reliant on msvcrt.dll's malloc however,
+ * which can't be updated to give that guarantee.
+ */
+#define SIMDALIGN alignas(32)
+#else
+#define SIMDALIGN
+#endif
+
 /* Unlike the likely attribute, ASSUME requires the condition to be true or
  * else it invokes undefined behavior. It's essentially an assert without
  * actually checking the condition at run-time, allowing for stronger
@@ -56,6 +74,12 @@
 #define UNLIKELY
 #endif
 
+#if !defined(_WIN32) && HAS_ATTRIBUTE(gnu::visibility)
+#define DECL_HIDDEN [[gnu::visibility("hidden")]]
+#else
+#define DECL_HIDDEN
+#endif
+
 namespace al {
 
 template<typename T>