[libc] [llvm] [do not submit] testing purposes only (PR #145984)

[Amy Huang via llvm-commits]

https://github.com/amykhuang updated https://github.com/llvm/llvm-project/pull/145984

>From a33284e81faa15c07c82bd009a50bd3139475f66 Mon Sep 17 00:00:00 2001
From: Amy Huang <akhuang at google.com>
Date: Thu, 26 Jun 2025 15:41:32 -0700
Subject: [PATCH] [do not submit] testing purposes only

---
 .github/workflows/libc-fullbuild-tests.yml     | 2 +-
 .github/workflows/libc-overlay-tests.yml       | 2 +-
 libc/CMakeLists.txt                            | 2 ++
 libc/cmake/modules/LLVMLibCArchitectures.cmake | 1 +
 4 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/libc-fullbuild-tests.yml b/.github/workflows/libc-fullbuild-tests.yml
index 24d75f58d45e0..c4b195dd82cab 100644
--- a/.github/workflows/libc-fullbuild-tests.yml
+++ b/.github/workflows/libc-fullbuild-tests.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        build_type: [Debug, Release, MinSizeRel]
+        # build_type: [Debug, Release, MinSizeRel]
         include:
           - os: ubuntu-24.04
             ccache-variant: sccache
diff --git a/.github/workflows/libc-overlay-tests.yml b/.github/workflows/libc-overlay-tests.yml
index da82d8d9fe8ab..c6da39dd4c3a1 100644
--- a/.github/workflows/libc-overlay-tests.yml
+++ b/.github/workflows/libc-overlay-tests.yml
@@ -16,7 +16,7 @@ jobs:
       # Set fail-fast to false to ensure that feedback is delivered for all matrix combinations.
       fail-fast: false
       matrix:
-        build_type: [Debug, Release, MinSizeRel]
+        # build_type: [Debug, Release, MinSizeRel]
         include:
           # TODO: add linux gcc when it is fixed
           - os: ubuntu-24.04
diff --git a/libc/CMakeLists.txt b/libc/CMakeLists.txt
index 507b3aa88babf..9197281e73099 100644
--- a/libc/CMakeLists.txt
+++ b/libc/CMakeLists.txt
@@ -1,6 +1,8 @@
 cmake_minimum_required(VERSION 3.20.0)
 set(LLVM_SUBPROJECT_TITLE "libc")
 
+# nothing change
+
 if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
   message(FATAL_ERROR "Builds rooted in the libc directory are not supported. "
     "Builds should be rooted in the runtimes directory instead. "
diff --git a/libc/cmake/modules/LLVMLibCArchitectures.cmake b/libc/cmake/modules/LLVMLibCArchitectures.cmake
index c94a407d974df..74186f156a44b 100644
--- a/libc/cmake/modules/LLVMLibCArchitectures.cmake
+++ b/libc/cmake/modules/LLVMLibCArchitectures.cmake
@@ -187,6 +187,7 @@ elseif(LIBC_TARGET_OS STREQUAL "darwin")
   set(LIBC_TARGET_OS_IS_DARWIN TRUE)
 elseif(LIBC_TARGET_OS STREQUAL "windows")
   set(LIBC_TARGET_OS_IS_WINDOWS TRUE)
+  message(FATAL_ERROR "hello world")
 elseif(LIBC_TARGET_OS STREQUAL "gpu")
   set(LIBC_TARGET_OS_IS_GPU TRUE)
 elseif(LIBC_TARGET_OS STREQUAL "uefi")