[libc-commits] [PATCH] D141426: [libc] Use a prebuilt libc-hdrgen binary if available.

[Siva Chandra via Phabricator via libc-commits]

sivachandra added inline comments.


================
Comment at: libc/CMakeLists.txt:155-156
-  # We need to set up hdrgen first since other targets depend on it.
-  add_subdirectory(utils/LibcTableGenUtil)
-  add_subdirectory(utils/HdrGen)
-endif()
----------------
jhuber6 wrote:
> ```
> CMake Error at /home/jhuber/Documents/llvm/llvm-project/libc/utils/HdrGen/CMakeLists.txt:3 (add_tablegen):
>   Unknown CMake command "add_tablegen".
> ```
> This gives me the following error when I run with `-DLLVM_ENABLE_RUNTIMES=libc`. I remember adding this code to work around it.
Ah, OK. One way to fix that problem is proposed here: https://reviews.llvm.org/D141460. Essentially, libc-hdrgen is a host tool and should be built separately and not as part of the libc build. As a workaround for now, you can try building libc-hdrgen separately and then do a full build with the `LIBC_HDRGEN_EXE` option specified.

Also, can you explain why you need full-build for GPU builds? For headers?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D141426/new/

https://reviews.llvm.org/D141426