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

[Rajveer Singh Bharadwaj via libc-commits]

https://github.com/Rajveer100 created https://github.com/llvm/llvm-project/pull/96949

Resolves #96689

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

>From 699ac5b1eee977fc8bdd8e34c88492dc38968550 Mon Sep 17 00:00:00 2001
From: Rajveer <rajveer.developer at icloud.com>
Date: Thu, 27 Jun 2024 00:14:31 +0530
Subject: [PATCH] [libc] Enable `-Wunused` and clean up found instances

Resolves #96689

Updates `compile_options` in the `LLVMLibCObjectRules` CMake script.
---
 libc/cmake/modules/LLVMLibCObjectRules.cmake | 5 +++++
 1 file changed, 5 insertions(+)

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)