[libc-commits] [libc] [libc] Fail fast when building standalone (PR #119426)

[Carlo Cabrera via libc-commits]

================
@@ -1,6 +1,12 @@
 cmake_minimum_required(VERSION 3.20.0)
 set(LLVM_SUBPROJECT_TITLE "libc")
 
+if(CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
+  message(FATAL_ERROR "Builds rooted in the libc directory are not supported. "
----------------
carlocab wrote:

Seems nicer to me to error out, but I'm open to changing this to a warning instead.

https://github.com/llvm/llvm-project/pull/119426