Generate the test configuration even when LIBCXX_INCLUDE_TESTS=OFF.

This patch changes the CMake configuration so that it always
generates the test/lit.site.cfg file, even when testing is disabled.

This allows users to test libc++ without requiring them to have
a full LLVM checkout on their machine.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@296685 91177308-0d34-0410-b5e6-96231b3b80d8

CMakeLists.txt

@@ -19,7 +19,6 @@ set(CMAKE_MODULE_PATH
   ${CMAKE_MODULE_PATH}
   )
 
-
 if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
   project(libcxx CXX C)
 
@@ -600,10 +599,15 @@ add_subdirectory(lib)
 if (LIBCXX_INCLUDE_BENCHMARKS)
   add_subdirectory(benchmarks)
 endif()
+
+# Create the lit.site.cfg file even when LIBCXX_INCLUDE_TESTS is OFF or
+# LLVM_FOUND is OFF. This allows users to run the tests manually using
+# LIT without requiring a full LLVM checkout.
+add_subdirectory(test)
 if (LIBCXX_INCLUDE_TESTS)
-  add_subdirectory(test)
   add_subdirectory(lib/abi)
 endif()
+
 if (LIBCXX_INCLUDE_DOCS)
   add_subdirectory(docs)
 endif()

test/CMakeLists.txt

@@ -1,5 +1,3 @@
-include(AddLLVM) # for add_lit_testsuite
-
 macro(pythonize_bool var)
   if (${var})
     set(${var} True)
@@ -66,12 +64,15 @@ if (LIBCXX_BUILD_EXTERNAL_THREAD_LIBRARY)
   list(APPEND LIBCXX_TEST_DEPS cxx_external_threads)
 endif()
 
-add_lit_testsuite(check-cxx
-  "Running libcxx tests"
-  ${CMAKE_CURRENT_BINARY_DIR}
-  DEPENDS cxx ${LIBCXX_TEST_DEPS})
+if (LIBCXX_INCLUDE_TESTS)
+  include(AddLLVM) # for add_lit_testsuite
+  add_lit_testsuite(check-cxx
+    "Running libcxx tests"
+    ${CMAKE_CURRENT_BINARY_DIR}
+    DEPENDS cxx ${LIBCXX_TEST_DEPS})
 
-add_custom_target(check-libcxx DEPENDS check-cxx)
+  add_custom_target(check-libcxx DEPENDS check-cxx)
+endif()
 
 if (LIBCXX_GENERATE_COVERAGE)
   include(CodeCoverage)