Fixes added for clang.

- Enum values now assigned with C-enums instead of type-safe enums.
- Atomic included at `constants.h` so it's available everywhere.
- Fixed CommitManager forward declaration.
- Added `scalarLayout` option to slang compiler.

aster/include/aster/core/constants.h

@@ -13,6 +13,8 @@
 #include <glm/glm.hpp>
 #include <glm/gtx/quaternion.hpp>
 
+#include <atomic>
+
 using c8 = char;
 using u8 = uint8_t;
 using u16 = uint16_t;

aster/include/aster/systems/device.h

@@ -272,14 +272,14 @@ struct VertexInput
 enum class ShaderType
 {
     eInvalid = 0,
-    eVertex = vk::ShaderStageFlagBits::eVertex,
+    eVertex = VK_SHADER_STAGE_VERTEX_BIT,
-    eTesselationControl = vk::ShaderStageFlagBits::eTessellationControl,
+    eTesselationControl = VK_SHADER_STAGE_TESSELLATION_CONTROL_BIT,
-    eTesselationEvaluation = vk::ShaderStageFlagBits::eTessellationEvaluation,
+    eTesselationEvaluation = VK_SHADER_STAGE_TESSELLATION_EVALUATION_BIT,
-    eGeometry = vk::ShaderStageFlagBits::eGeometry,
+    eGeometry = VK_SHADER_STAGE_GEOMETRY_BIT,
-    eFragment = vk::ShaderStageFlagBits::eFragment,
+    eFragment = VK_SHADER_STAGE_FRAGMENT_BIT,
-    eCompute = vk::ShaderStageFlagBits::eCompute,
+    eCompute = VK_SHADER_STAGE_COMPUTE_BIT,
-    eTask = vk::ShaderStageFlagBits::eTaskEXT,
+    eTask = VK_SHADER_STAGE_TASK_BIT_EXT,
-    eMesh = vk::ShaderStageFlagBits::eMeshEXT,
+    eMesh = VK_SHADER_STAGE_MESH_BIT_EXT,
     eMax,
 };
 
@@ -473,6 +473,8 @@ struct Frame
     ~Frame() = default;
 };
 
+class CommitManager;
+
 class Device final
 {
   public: // TODO: Temp

aster/src/aster/systems/device.cpp

@@ -1070,6 +1070,7 @@ systems::Device::Device(const DeviceCreateInfo &createInfo)
     std::array compilerOptions = {
         useOriginalEntrypointNames,
         bindlessSpaceIndex,
+        scalarLayout,
     };
 
     const slang::TargetDesc spirvTargetDesc = {