Can't build with latest Dawn

[stackotter]

Context

I downloaded and successfully built Dawn (commit 2aa0042b). And then attempted to build swift-webgpu (commit 18cb045) using the following command:

swift build -c release \
-Xcc -I../dawn/src/include \
-Xcc -I../dawn/out/Release/gen/src/include \
-Xlinker -L../dawn/out/Release \
-Xlinker -rpath -Xlinker ../dawn/out/Release

The build failed. I am on Xcode version 13.2 and macOS version 12.0.1

Log output

/Users/rohanvanklinken/Desktop/Projects/Swift/WebGPU/dawn/out/Release/gen/src/include/dawn/dawn_proc_table.h:8:16: error: 'DawnProcTable' has different definitions in different modules; definition in module 'CDawnProc' is here
typedef struct DawnProcTable {
               ^
/Users/rohanvanklinken/Desktop/Projects/Swift/WebGPU/dawn/out/Release/gen/src/include/dawn/dawn_proc_table.h:8:16: note: definition in module 'CDawnNative' is here
typedef struct DawnProcTable {
               ^
[1/8] Compiling DawnNative DawnNative.swift

[henrybetts]

Something strange is going on here, possibly even a clang bug. I am able to reproduce the same error occasionally by clearing the build folder and rebuilding, but not all of the time. I may need to dive deeper into clang modules at some point to understand what is happening.

For now though, c1f91b2 seems to fix this for me. Let me know otherwise.

[stackotter]

Thanks, that fixed it! I look forward to playing around with this a bit, it looks cool.