[lldb] Include gtest in standalone build only if LLDB_INCLUDE_TESTS

Build gtest targets when building standalone only if LLDB_INCLUDE_TESTS
is true.  Prior to this change, they were built whenever
LLVM_MAIN_SRC_DIR was available, independently whether tests themselves
would be run.

Differential Revision: https://reviews.llvm.org/D136551

Author: mgorny

lldb/CMakeLists.txt

@@ -17,6 +17,8 @@ endif()
 # Must go below project(..)
 include(GNUInstallDirs)
 
+option(LLDB_INCLUDE_TESTS "Generate build targets for the LLDB unit tests." ${LLVM_INCLUDE_TESTS})
+
 if(LLDB_BUILT_STANDALONE)
   include(LLDBStandalone)
 
@@ -129,7 +131,6 @@ if (NOT TARGET llvm_gtest)
   set(LLDB_INCLUDE_UNITTESTS OFF)
 endif()
 
-option(LLDB_INCLUDE_TESTS "Generate build targets for the LLDB unit tests." ${LLVM_INCLUDE_TESTS})
 if(LLDB_INCLUDE_TESTS)
   add_subdirectory(test)
   if (LLDB_INCLUDE_UNITTESTS)

lldb/cmake/modules/LLDBStandalone.cmake

@@ -103,16 +103,18 @@ include_directories(
   "${LLVM_INCLUDE_DIRS}"
   "${CLANG_INCLUDE_DIRS}")
 
-# Build the gtest library needed for unittests, if we have LLVM sources
-# handy.
-if (EXISTS ${LLVM_MAIN_SRC_DIR}/utils/unittest AND NOT TARGET llvm_gtest)
-  add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/unittest utils/unittest)
-endif()
-# LLVMTestingSupport library is needed for Process/gdb-remote.
-if (EXISTS ${LLVM_MAIN_SRC_DIR}/lib/Testing/Support
-    AND NOT TARGET LLVMTestingSupport)
-  add_subdirectory(${LLVM_MAIN_SRC_DIR}/lib/Testing/Support
-    lib/Testing/Support)
+if(LLDB_INCLUDE_TESTS)
+  # Build the gtest library needed for unittests, if we have LLVM sources
+  # handy.
+  if (EXISTS ${LLVM_MAIN_SRC_DIR}/utils/unittest AND NOT TARGET llvm_gtest)
+    add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/unittest utils/unittest)
+  endif()
+  # LLVMTestingSupport library is needed for Process/gdb-remote.
+  if (EXISTS ${LLVM_MAIN_SRC_DIR}/lib/Testing/Support
+      AND NOT TARGET LLVMTestingSupport)
+    add_subdirectory(${LLVM_MAIN_SRC_DIR}/lib/Testing/Support
+      lib/Testing/Support)
+  endif()
 endif()
 
 option(LLVM_USE_FOLDERS "Enable solution folders in Visual Studio. Disable for Express versions." ON)