diff --git a/External/SPEC/CINT2000/186.crafty/CMakeLists.txt b/External/SPEC/CINT2000/186.crafty/CMakeLists.txt
--- a/External/SPEC/CINT2000/186.crafty/CMakeLists.txt
+++ b/External/SPEC/CINT2000/186.crafty/CMakeLists.txt
@@ -26,7 +26,7 @@
   list(APPEND CPPFLAGS -DHAS_LONGLONG)
 endif()
 
-list(APPEND LDFLAGS -Wl,-zmuldefs)
+list(APPEND LDFLAGS ${LD_MULTIDEF_FLAG})
 
 set(SourceNames
   attacks.c
diff --git a/External/SPEC/CINT2000/300.twolf/CMakeLists.txt b/External/SPEC/CINT2000/300.twolf/CMakeLists.txt
--- a/External/SPEC/CINT2000/300.twolf/CMakeLists.txt
+++ b/External/SPEC/CINT2000/300.twolf/CMakeLists.txt
@@ -1,6 +1,6 @@
 list(APPEND CPPFLAGS -DHAVE_SIGNED_CHAR)
 list(APPEND LDFLAGS -lm)
-list(APPEND LDFLAGS -Wl,-zmuldefs)
+list(APPEND LDFLAGS ${LD_MULTIDEF_FLAG})
 list(APPEND CFLAGS -Wno-return-type)
 
 macro(test_input run_type)
diff --git a/External/SPEC/SpecCPU2000.cmake b/External/SPEC/SpecCPU2000.cmake
--- a/External/SPEC/SpecCPU2000.cmake
+++ b/External/SPEC/SpecCPU2000.cmake
@@ -1,4 +1,5 @@
 include(External)
+include(CheckCSourceCompiles)
 llvm_externals_find(TEST_SUITE_SPEC2000_ROOT "speccpu2000" "SPEC CPU2000")
 if(TEST_SUITE_SPEC2000_ROOT)
   # SPEC supports three "run types": ref, train and test
@@ -33,4 +34,18 @@
   function(llvm_test_data_spec_default target)
     llvm_test_data_spec(${target} data)
   endfunction()
+
+  function(check_supports_zmuldefs)
+    # Does not check whether the option has an effect.
+    # -z options are usually ignored if the particular option.
+    # Alternative option is --allow-multiple-definition
+    set(CMAKE_REQUIRED_LINK_OPTIONS "-Wl,-zmuldefs")
+    check_c_source_compiles("int main() { return 0; };" LINKER_SUPPORTS_ZMULDEFS)
+  endfunction()
+
+  check_supports_zmuldefs()
+  set(LD_MULTIDEF_FLAG)
+  if(LINKER_SUPPORTS_ZMULDEFS)
+    set(LD_MULTIDEF_FLAG "-Wl,-zmuldefs")
+  endif()
 endif()