Index: lib/asan/tests/CMakeLists.txt
===================================================================
--- lib/asan/tests/CMakeLists.txt
+++ lib/asan/tests/CMakeLists.txt
@@ -50,6 +50,11 @@
 
 # Unit tests require libstdc++.
 set(ASAN_UNITTEST_COMMON_LINKFLAGS -lstdc++)
+# x86_64 FreeBSD 9.2 additionally requires libc++ to build the tests.
+if(CMAKE_SYSTEM MATCHES "FreeBSD-9.2-RELEASE")
+  list(APPEND ASAN_UNITTEST_COMMON_LINKFLAGS "-lc++")
+endif()
+
 # Unit tests on Mac depend on Foundation.
 if(APPLE)
   list(APPEND ASAN_UNITTEST_COMMON_LINKFLAGS -framework Foundation)
Index: lib/sanitizer_common/tests/CMakeLists.txt
===================================================================
--- lib/sanitizer_common/tests/CMakeLists.txt
+++ lib/sanitizer_common/tests/CMakeLists.txt
@@ -45,6 +45,10 @@
   -lstdc++)
 append_if(COMPILER_RT_HAS_LIBDL -ldl SANITIZER_TEST_LINK_FLAGS_COMMON)
 append_if(COMPILER_RT_HAS_LIBPTHREAD -lpthread SANITIZER_TEST_LINK_FLAGS_COMMON)
+# x86_64 FreeBSD 9.2 additionally requires libc++ to build the tests.
+if(CMAKE_SYSTEM MATCHES "FreeBSD-9.2-RELEASE")
+  list(APPEND SANITIZER_TEST_LINK_FLAGS_COMMON "-lc++")
+endif()
 
 include_directories(..)
 include_directories(../..)