1*8975f5c5SAndroid Build Coastguard Worker# CLSPV GN Build 2*8975f5c5SAndroid Build Coastguard Worker 3*8975f5c5SAndroid Build Coastguard WorkerThe clspv official build system is CMake and as such have no GN build infra. The 4*8975f5c5SAndroid Build Coastguard Workerfiles in here enable building `clspv` using the ANGLE GN build infra. 5*8975f5c5SAndroid Build Coastguard Worker 6*8975f5c5SAndroid Build Coastguard WorkerThe top-level build file is `BUILD.gn` with all the auxiliary build files 7*8975f5c5SAndroid Build Coastguard Workerlocated in the `gn` folder. The `clspv` build is heavily dependent on the LLVM 8*8975f5c5SAndroid Build Coastguard Workerbuild. The LLVM settings and targets needed for `clspv` are captured in the 9*8975f5c5SAndroid Build Coastguard Worker`gn/llvm` location. These utilize the LLVM experimental GN build infra [1]. 10*8975f5c5SAndroid Build Coastguard Worker 11*8975f5c5SAndroid Build Coastguard Worker## Build Instructions 12*8975f5c5SAndroid Build Coastguard Worker 13*8975f5c5SAndroid Build Coastguard WorkerThe GN build in here is setup to function within the ANGLE GN build 14*8975f5c5SAndroid Build Coastguard Workerinfrastructure and as such follows the same setup as of ANGLE project. Please 15*8975f5c5SAndroid Build Coastguard Workerrefer top level ANGLE readme file. 16*8975f5c5SAndroid Build Coastguard Worker 17*8975f5c5SAndroid Build Coastguard WorkerAdd the following to `args.gn` file 18*8975f5c5SAndroid Build Coastguard Worker 19*8975f5c5SAndroid Build Coastguard Worker``` 20*8975f5c5SAndroid Build Coastguard Workerangle_enable_cl = true 21*8975f5c5SAndroid Build Coastguard Worker``` 22*8975f5c5SAndroid Build Coastguard Worker 23*8975f5c5SAndroid Build Coastguard WorkerNote: Only the `linux/x86{,_64}` and `android/arm{64}` combination of `os/cpu` 24*8975f5c5SAndroid Build Coastguard Workerare setup for now. 25*8975f5c5SAndroid Build Coastguard Worker 26*8975f5c5SAndroid Build Coastguard Worker## Updating the LLVM build targets 27*8975f5c5SAndroid Build Coastguard Worker 28*8975f5c5SAndroid Build Coastguard WorkerThe LLVM targets required for clspv are housed in the `gn/llvm` location. In the 29*8975f5c5SAndroid Build Coastguard Workercase of source files getting added/removed in the upstream LLVM, the relavant 30*8975f5c5SAndroid Build Coastguard Workertarget sources needs to be modified in `gn/llvm/sources/BUILD.gn`. 31*8975f5c5SAndroid Build Coastguard Worker 32*8975f5c5SAndroid Build Coastguard WorkerThe LLVM targets are named in the format `clspv_<llvm/clang>_<folder path 33*8975f5c5SAndroid Build Coastguard Workerslug with _>`. 34*8975f5c5SAndroid Build Coastguard Worker 35*8975f5c5SAndroid Build Coastguard WorkerFor instance `clspv_llvm_lib_frontend_offloading` refers to the LLVM 36*8975f5c5SAndroid Build Coastguard Workertarget in `third_party/llvm/src/llvm/lib/Frontend/Offloading`. The `sources` 37*8975f5c5SAndroid Build Coastguard Workerlist in from the corresponding LLVM `BUILD.gn` file, here 38*8975f5c5SAndroid Build Coastguard Worker`third_party/llvm/src/llvm/utils/gn/secondary/llvm/lib/Frontend/Offloading` can 39*8975f5c5SAndroid Build Coastguard Workerbe copied with prefix path "//$clspv_llvm_dir/llvm/lib/Frontend/Offloading/" 40*8975f5c5SAndroid Build Coastguard Workerapplied to it. 41*8975f5c5SAndroid Build Coastguard Worker 42*8975f5c5SAndroid Build Coastguard Worker## References 43*8975f5c5SAndroid Build Coastguard Worker 44*8975f5c5SAndroid Build Coastguard Worker[1]: https://github.com/llvm/llvm-project/blob/main/llvm/utils/gn/README.rst 45