[libc++] Make sure we don't attempt to run check-cxx-abilist when libc++ doesn't...

That would make the test fail spuriously because we don't generate
an ABI list for that configuration.

diff --git a/libcxx/lib/abi/CMakeLists.txt b/libcxx/lib/abi/CMakeLists.txt
index 0fa3aac..cf7457f 100644 (file)
--- a/libcxx/lib/abi/CMakeLists.txt
+++ b/libcxx/lib/abi/CMakeLists.txt
@@ -22,7 +22,8 @@ if (EXISTS "${ABILIST_FILE}"
     AND ("${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "libcxxabi" OR
          (APPLE AND "${LIBCXX_CXX_ABI_LIBNAME}" STREQUAL "default"))
     AND NOT LIBCXX_ABI_UNSTABLE
-    AND LIBCXX_ENABLE_EXCEPTIONS)
+    AND LIBCXX_ENABLE_EXCEPTIONS
+    AND LIBCXX_ENABLE_NEW_DELETE_DEFINITIONS)
     add_custom_target(check-cxx-abilist
             ${SYMDIFF_EXE} --only-stdlib-symbols --strict ${ABILIST_FILE}
             $<TARGET_SONAME_FILE:cxx_shared>