initial commit, 4.5 stable

thirdparty/vhacd/patches/0002-fpermissive-fix.patch

@@ -0,0 +1,49 @@
+diff --git a/thirdparty/vhacd/inc/btScalar.h b/thirdparty/vhacd/inc/btScalar.h
+index 404bcbcfe1..db00a3c428 100644
+--- a/thirdparty/vhacd/inc/btScalar.h
++++ b/thirdparty/vhacd/inc/btScalar.h
+@@ -537,6 +537,27 @@ struct btTypedObject {
+     }
+ };
+ 
++// Cherry-picked from Bullet 2.88 to fix GH-27926
++///align a pointer to the provided alignment, upwards
++template <typename T>
++T *btAlignPointer(T *unalignedPtr, size_t alignment)
++{
++    struct btConvertPointerSizeT
++    {
++        union {
++            T *ptr;
++            size_t integer;
++        };
++    };
++    btConvertPointerSizeT converter;
++
++    const size_t bit_mask = ~(alignment - 1);
++    converter.ptr = unalignedPtr;
++    converter.integer += alignment - 1;
++    converter.integer &= bit_mask;
++    return converter.ptr;
++}
++
+ }; // namespace VHACD
+ 
+ #endif //BT_SCALAR_H
+diff --git a/thirdparty/vhacd/src/btAlignedAllocator.cpp b/thirdparty/vhacd/src/btAlignedAllocator.cpp
+index bbb8baa107..4d7f4b1b2f 100644
+--- a/thirdparty/vhacd/src/btAlignedAllocator.cpp
++++ b/thirdparty/vhacd/src/btAlignedAllocator.cpp
+@@ -70,8 +70,10 @@ static inline void* btAlignedAllocDefault(size_t size, int32_t alignment)
+ 
+     real = (char*)sAllocFunc(size + sizeof(void*) + (alignment - 1));
+     if (real) {
+-        offset = (alignment - (unsigned long)(real + sizeof(void*))) & (alignment - 1);
+-        ret = (void*)((real + sizeof(void*)) + offset);
++        // Synced with Bullet 2.88 to fix GH-27926
++        //offset = (alignment - (unsigned long)(real + sizeof(void*))) & (alignment - 1);
++        //ret = (void*)((real + sizeof(void*)) + offset);
++        ret = btAlignPointer(real + sizeof(void *), alignment);
+         *((void**)(ret)-1) = (void*)(real);
+     }
+     else {