[llvm] [PATCH] offload-tunnel-cmake with proper escape (PR #161552)

[via llvm-commits]

https://github.com/hjagasiaAMD updated https://github.com/llvm/llvm-project/pull/161552

>From e55f43c721cf3b0efd726aea260b3adb48fa84b9 Mon Sep 17 00:00:00 2001
From: hjagasiaAMD <harsha.jagasia at amd.com>
Date: Wed, 1 Oct 2025 10:36:35 -0500
Subject: [PATCH] [PATCH] offload-tunnel-cmake with proper escape

---
 llvm/runtimes/CMakeLists.txt | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/llvm/runtimes/CMakeLists.txt b/llvm/runtimes/CMakeLists.txt
index 86cfd0285aa84..7317116afe276 100644
--- a/llvm/runtimes/CMakeLists.txt
+++ b/llvm/runtimes/CMakeLists.txt
@@ -507,10 +507,14 @@ if(build_runtimes)
   endif()
 
   # Forward user-provived system configuration to runtimes for requirement introspection.
-  # CMAKE_PREFIX_PATH is the search path for CMake packages.
+  # CMAKE_PREFIX_PATH is the search path for CMake packages. In order to pass through
+  # the command line interface, the CMake semicolon separator needs to be replaced
+  # with $<SEMICOLON>
   if(CMAKE_PREFIX_PATH)
-    list(APPEND extra_cmake_args "-DCMAKE_PREFIX_PATH=${CMAKE_PREFIX_PATH}")
+    string(JOIN "$<SEMICOLON>" escaped_cmake_prefix_path ${CMAKE_PREFIX_PATH})
+    list(APPEND extra_cmake_args "-DCMAKE_PREFIX_PATH=${escaped_cmake_prefix_path}")
   endif()
+
   # CMAKE_PROGRAM_PATH is the search path for executables such as python.
   if(CMAKE_PROGRAM_PATH)
     list(APPEND extra_cmake_args "-DCMAKE_PROGRAM_PATH=${CMAKE_PROGRAM_PATH}")