Add support for building LLVM on FreeBSD 9.2

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205847 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index f007b37dc30de99e719f6014c8285fc5489bb31a..197caf9355bfca35c5b2bbfc4ba6287bbefa2faf 100755 (executable)
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -17,6 +17,11 @@ if( UNIX AND NOT BEOS )
   # Used by check_symbol_exists:
   set(CMAKE_REQUIRED_LIBRARIES m)
 endif()
+# x86_64 FreeBSD 9.2 requires libcxxrt to be specified explicitly.
+if( CMAKE_SYSTEM MATCHES "FreeBSD-9.2-RELEASE" AND
+    CMAKE_SIZEOF_VOID_P EQUAL 8 )
+  list(APPEND CMAKE_REQUIRED_LIBRARIES "cxxrt")
+endif()
 
 # Helper macros and functions
 macro(add_cxx_include result files)