| Issue |
124860
|
| Summary |
[libc][cmake] Deprecate LLVM_LIBC_* cmake flags and replacing them with LIBC_* flags.
|
| Labels |
libc
|
| Assignees |
|
| Reporter |
lntue
|
Currently, in LLVM libc's cmake build system, both styles of flags, `LLVM_LIBC_<flag>` and `LIBC_<flag>` are being used.
We would like to deprecate all `LLVM_LIBC_<flag>`-style in favor of `LIBC_<flag>`-style. Our plan is as follow:
For LLVM 21:
- [ ] Create `LIBC_<flag>` variant of the current `LLVM_LIBC_<flag>`
- [ ] Error out if both `LLVM_LIBC_<flag>` and `LIBC_<flag>` are set
- [ ] If only `LLVM_LIBC_<flag>` is set, warn that `LLVM_LIBC_<flag>` will be deprecated in LLVM 22, use `LIBC_<flag>` instead; and set`LIBC_<flag>` to be the same as `LLVM_LIBC_<flag>`.
- [ ] Migrate all usages of `LLVM_LIBC_<flag>` in llvm-project repo to `LIBC_<flag>`.
- [ ] Migrate all usages of `LLVM_LIBC_<flag>` in llvm-zorg repo to `LIBC_<flag>`.
- [ ] Migrate all usages of `LLVM_LIBC_<flag>` in the remaining bots to `LIBC_<flag>`.
- [ ] (Optional) Create a tracking issue for LLVM 22 and close this issue, considering the work for this issue in LLVM 21 is completed.
For LLVM 22:
- [ ] Remove all the extra logic related to `LLVM_LIBC_<flag>` in the cmake build system.
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