[docs] Mention LLVM_ENABLE_MODULES.

diff --git a/llvm/docs/CMake.rst b/llvm/docs/CMake.rst
index f96e34f..da13726 100644 (file)
--- a/llvm/docs/CMake.rst
+++ b/llvm/docs/CMake.rst
@@ -306,6 +306,9 @@ LLVM-specific variables
   scenario where a manual override may be desirable is when using Visual Studio
   2017's CMake integration, which would not be detected as an IDE otherwise.
 
+**LLVM_ENABLE_MODULES**
+  Compile with C++ modules enabled.
+
 **LLVM_ENABLE_PIC**:BOOL
   Add the ``-fPIC`` flag to the compiler command-line, if the compiler supports
   this flag. Some systems, like Windows, do not need this flag. Defaults to ON.