Index: lib/CMakeLists.txt
===================================================================
--- lib/CMakeLists.txt
+++ lib/CMakeLists.txt
@@ -7,7 +7,8 @@
   list(APPEND LIBCXX_SOURCES ${LIBCXX_WIN32_SOURCES})
 elseif("${CMAKE_SYSTEM_NAME}" STREQUAL "SunOS")
   file(GLOB LIBCXX_SOLARIS_SOURCES ../src/support/solaris/*.c)
-  list(APPEND LIBCXX_SOURCES ${LIBCXX_SOLARIS_SOURCES})
+  add_library(libcxx_solaris_compat STATIC ${LIBCXX_SOLARIS_SOURCES})
+  add_library_flags(libcxx_solaris_compat)
 endif()
 
 # Add all the headers to the project for IDEs.