[libc-commits] [libc] [libc] Enable `-Wunused` and clean up found instances (PR #96949)

[via libc-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-libc

Author: Rajveer Singh Bharadwaj (Rajveer100)

<details>
<summary>Changes</summary>

Resolves #<!-- -->96689

Updates `compile_options` in the `LLVMLibCObjectRules` CMake script.

---
Full diff: https://github.com/llvm/llvm-project/pull/96949.diff


1 Files Affected:

- (modified) libc/cmake/modules/LLVMLibCObjectRules.cmake (+5) 


``````````diff
diff --git a/libc/cmake/modules/LLVMLibCObjectRules.cmake b/libc/cmake/modules/LLVMLibCObjectRules.cmake
index 134c5143d6d61..c53548a1294e4 100644
--- a/libc/cmake/modules/LLVMLibCObjectRules.cmake
+++ b/libc/cmake/modules/LLVMLibCObjectRules.cmake
@@ -50,6 +50,8 @@ function(create_object_library fq_target_name)
   _get_common_compile_options(compile_options "${ADD_OBJECT_FLAGS}")
   list(APPEND compile_options ${ADD_OBJECT_COMPILE_OPTIONS})
 
+  list(APPEND compile_options -Wunused)
+
   add_library(
     ${fq_target_name}
     EXCLUDE_FROM_ALL
@@ -251,6 +253,9 @@ function(create_entrypoint_object fq_target_name)
   endif()
 
   _get_common_compile_options(common_compile_options "${ADD_ENTRYPOINT_OBJ_FLAGS}")
+
+  list(APPEND common_compile_options -Wunused)
+
   list(APPEND common_compile_options ${ADD_ENTRYPOINT_OBJ_COMPILE_OPTIONS})
   get_fq_deps_list(fq_deps_list ${ADD_ENTRYPOINT_OBJ_DEPENDS})
   set(full_deps_list ${fq_deps_list} libc.src.__support.common)

``````````

</details>


https://github.com/llvm/llvm-project/pull/96949