diff --git a/clang/cmake/caches/Fuchsia-stage2.cmake b/clang/cmake/caches/Fuchsia-stage2.cmake
--- a/clang/cmake/caches/Fuchsia-stage2.cmake
+++ b/clang/cmake/caches/Fuchsia-stage2.cmake
@@ -23,6 +23,8 @@
 set(LLVM_INCLUDE_EXAMPLES OFF CACHE BOOL "")
 set(LLVM_STATIC_LINK_CXX_STDLIB ON CACHE BOOL "")
 set(LLVM_USE_RELATIVE_PATHS_IN_FILES ON CACHE BOOL "")
+set(LLDB_ENABLE_CURSES OFF CACHE BOOL "")
+set(LLDB_ENABLE_LIBEDIT OFF CACHE BOOL "")
 
 if(WIN32)
   set(LLVM_USE_CRT_RELEASE "MT" CACHE STRING "")
diff --git a/clang/cmake/caches/Fuchsia.cmake b/clang/cmake/caches/Fuchsia.cmake
--- a/clang/cmake/caches/Fuchsia.cmake
+++ b/clang/cmake/caches/Fuchsia.cmake
@@ -4,7 +4,7 @@
 
 set(PACKAGE_VENDOR Fuchsia CACHE STRING "")
 
-set(LLVM_ENABLE_PROJECTS "bolt;clang;clang-tools-extra;lld;llvm;polly" CACHE STRING "")
+set(_FUCHSIA_ENABLE_PROJECTS "bolt;clang;clang-tools-extra;lld;llvm;polly")
 
 set(LLVM_ENABLE_DIA_SDK OFF CACHE BOOL "")
 set(LLVM_ENABLE_LIBEDIT OFF CACHE BOOL "")
@@ -17,6 +17,8 @@
 set(LLVM_INCLUDE_DOCS OFF CACHE BOOL "")
 set(LLVM_INCLUDE_EXAMPLES OFF CACHE BOOL "")
 set(LLVM_USE_RELATIVE_PATHS_IN_FILES ON CACHE BOOL "")
+set(LLDB_ENABLE_CURSES OFF CACHE BOOL "")
+set(LLDB_ENABLE_LIBEDIT OFF CACHE BOOL "")
 
 # Passthrough stage1 flags to stage1.
 set(_FUCHSIA_BOOTSTRAP_PASSTHROUGH
@@ -30,6 +32,9 @@
   LLVM_ENABLE_CURL
   CURL_ROOT
   OpenSSL_ROOT
+  FUCHSIA_ENABLE_LLDB
+  LLDB_ENABLE_CURSES
+  LLDB_ENABLE_LIBEDIT
   CMAKE_FIND_PACKAGE_PREFER_CONFIG
   CMAKE_SYSROOT
   CMAKE_MODULE_LINKER_FLAGS
@@ -157,6 +162,12 @@
   install-distribution-toolchain
   clang CACHE STRING "")
 
+set(FUCHSIA_ENABLE_LLDB OFF CACHE BOOL "Enable LLDB")
+if(FUCHSIA_ENABLE_LLDB)
+  list(APPEND _FUCHSIA_ENABLE_PROJECTS lldb)
+endif()
+set(LLVM_ENABLE_PROJECTS ${_FUCHSIA_ENABLE_PROJECTS} CACHE STRING "")
+
 get_cmake_property(variableNames VARIABLES)
 foreach(variableName ${variableNames})
   if(variableName MATCHES "^STAGE2_")