diff --git a/libcxx/cmake/Modules/HandleLibCXXABI.cmake b/libcxx/cmake/Modules/HandleLibCXXABI.cmake
--- a/libcxx/cmake/Modules/HandleLibCXXABI.cmake
+++ b/libcxx/cmake/Modules/HandleLibCXXABI.cmake
@@ -121,6 +121,8 @@
   if(NOT LIBCXX_CXX_ABI_INCLUDE_PATHS)
     set(LIBCXX_CXX_ABI_INCLUDE_PATHS "/usr/include/c++/v1")
   endif()
+  # libcxxrt does not provide aligned new and delete operators
+  set(LIBCXX_ENABLE_NEW_DELETE_DEFINITIONS ON)
   setup_abi_lib(
     "-DLIBCXXRT"
     "cxxrt" "cxxrt" "cxxabi.h;unwind.h;unwind-arm.h;unwind-itanium.h" ""
diff --git a/libcxx/cmake/caches/FreeBSD.cmake b/libcxx/cmake/caches/FreeBSD.cmake
new file mode 100644
--- /dev/null
+++ b/libcxx/cmake/caches/FreeBSD.cmake
@@ -0,0 +1,9 @@
+set(CMAKE_BUILD_TYPE Release CACHE STRING "")
+set(CMAKE_POSITION_INDEPENDENT_CODE ON CACHE BOOL "")
+
+set(LIBCXX_ENABLE_ASSERTIONS OFF CACHE BOOL "")
+set(LIBCXX_ABI_VERSION "1" CACHE STRING "")
+set(LIBCXX_ENABLE_STATIC ON CACHE BOOL "")
+set(LIBCXX_ENABLE_SHARED ON CACHE BOOL "")
+set(LIBCXX_CXX_ABI libcxxrt CACHE STRING "")
+set(LIBCXX_ENABLE_NEW_DELETE_DEFINITIONS ON CACHE BOOL "")