[llvm] [cmake] Move FindLibcCommonUtils to shared cmake, to fix standalone builds (PR #131586)

[Michał Górny via llvm-commits]

https://github.com/mgorny created https://github.com/llvm/llvm-project/pull/131586

Move `FindLibcCommonUtils` from LLVM's CMake module directory to the shared top-level CMake directory, as the module is intended to be used from within the source tree rather than the installed LLVM version. This fixes standalone offload builds after #131205.

>From b4e629fcb4c5f68522ef53c17fb7d512cd4da9a2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20G=C3=B3rny?= <mgorny at gentoo.org>
Date: Mon, 17 Mar 2025 09:37:02 +0100
Subject: [PATCH] [cmake] Move FindLibcCommonUtils to shared cmake, to fix
 standalone builds

Move `FindLibcCommonUtils` from LLVM's CMake module directory
to the shared top-level CMake directory, as the module is intended to be
used from within the source tree rather than the installed LLVM version.
This fixes standalone offload builds after #131205.
---
 {llvm/cmake/modules => cmake/Modules}/FindLibcCommonUtils.cmake | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
 rename {llvm/cmake/modules => cmake/Modules}/FindLibcCommonUtils.cmake (94%)

diff --git a/llvm/cmake/modules/FindLibcCommonUtils.cmake b/cmake/Modules/FindLibcCommonUtils.cmake
similarity index 94%
rename from llvm/cmake/modules/FindLibcCommonUtils.cmake
rename to cmake/Modules/FindLibcCommonUtils.cmake
index 0e65fdff7c34b..95426c51a6041 100644
--- a/llvm/cmake/modules/FindLibcCommonUtils.cmake
+++ b/cmake/Modules/FindLibcCommonUtils.cmake
@@ -7,7 +7,7 @@
 #===--------------------------------------------------------------------===//
 
 if(NOT TARGET llvm-libc-common-utilities)
-  set(libc_path ${CMAKE_CURRENT_LIST_DIR}/../../../libc)
+  set(libc_path ${CMAKE_CURRENT_LIST_DIR}/../../libc)
   if (EXISTS ${libc_path} AND IS_DIRECTORY ${libc_path})
     add_library(llvm-libc-common-utilities INTERFACE)
     # TODO: Reorganize the libc shared section so that it can be included without