Builds on macOS (but crashes)

CMakeLists.txt

@@ -12,7 +12,7 @@ endif()
 if(GPU_RUNTIME STREQUAL "CUDA")
     set(CMAKE_CUDA_ARCHITECTURES 70 75)
     find_package(CUDAToolkit)
-    if (CUDAToolkit-NOTFOUND)
+    if (NOT CUDAToolkit_FOUND)
         message(WARNING "CUDA toolkit not found, building with CPU support only")
         set(GPU_RUNTIME "CPU")
     endif()

README.md

@@ -104,6 +104,28 @@ Optional: Edit cuda target (only if required) before `cmake --build .`
 C:/path_to/OpenSplat/build/gsplat.vcxproj
 for example: arch=compute_75,code=sm_75
 
+### macOS
+
+Support for macOS is very experimental.
+
+If you're using [brew], you can install OpenCV by running:
+
+```bash
+brew install opencv
+```
+
+Then run:
+
+```
+git clone https://github.com/pierotofy/OpenSplat OpenSplat
+cd OpenSplat
+mkdir build && cd build
+cmake -DCMAKE_PREFIX_PATH=/path/to/libtorch/ .. && make -j$(nproc)
+./opensplat
+```
+
+:warning: You will probably get a *libc10.dylib can’t be opened because apple cannot check it for malicious software* error message on first run. Open System Settings and go to Privacy & Security and find the "Allow" button. You might need to repeat this several times until all torch libraries are loaded.
+
 ## Docker Build
 
 ### CUDA

rasterize_gaussians.cpp

@@ -1,6 +1,8 @@
 #include "rasterize_gaussians.hpp"
 #include "gsplat.hpp"
 
+#if defined(USE_HIP) || defined(USE_CUDA)
+
 std::tuple<torch::Tensor,
         torch::Tensor,
         torch::Tensor,
@@ -34,8 +36,6 @@ std::tuple<torch::Tensor,
     return std::make_tuple(isectIds, gaussianIds, isectIdsSorted, gaussianIdsSorted, tileBins);
 }
 
-#if defined(USE_HIP) || defined(USE_CUDA)
-
 torch::Tensor RasterizeGaussians::forward(AutogradContext *ctx, 
             torch::Tensor xys,
             torch::Tensor depths,

rasterize_gaussians.hpp

@@ -6,6 +6,8 @@
 
 using namespace torch::autograd;
 
+#if defined(USE_HIP) || defined(USE_CUDA)
+
 std::tuple<torch::Tensor,
         torch::Tensor,
         torch::Tensor,
@@ -17,7 +19,6 @@ std::tuple<torch::Tensor,
                                             torch::Tensor cumTilesHit,
                                             TileBounds tileBounds);
 
-#if defined(USE_HIP) || defined(USE_CUDA)
 
 class RasterizeGaussians : public Function<RasterizeGaussians>{
 public: