diff --git a/compiler-rt/CMakeLists.txt b/compiler-rt/CMakeLists.txt
--- a/compiler-rt/CMakeLists.txt
+++ b/compiler-rt/CMakeLists.txt
@@ -482,6 +482,15 @@
   set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} /IGNORE:4221")
 endif()
 
+if(${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+  set(CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> -X32_64 qc <TARGET> <LINK_FLAGS> <OBJECTS>")
+  set(CMAKE_CXX_ARCHIVE_CREATE "<CMAKE_AR> -X32_64 qc <TARGET> <LINK_FLAGS> <OBJECTS>")
+  set(CMAKE_C_ARCHIVE_APPEND "<CMAKE_AR> -X32_64 q <TARGET> <LINK_FLAGS> <OBJECTS>")
+  set(CMAKE_CXX_ARCHIVE_APPEND "<CMAKE_AR> -X32_64 q <TARGET> <LINK_FLAGS> <OBJECTS>")
+  set(CMAKE_C_ARCHIVE_FINISH "<CMAKE_RANLIB> -X32_64 <TARGET>")
+  set(CMAKE_CXX_ARCHIVE_FINISH "<CMAKE_RANLIB> -X32_64 <TARGET>")
+endif()
+
 add_subdirectory(include)
 
 option(COMPILER_RT_USE_LIBCXX
diff --git a/compiler-rt/lib/builtins/CMakeLists.txt b/compiler-rt/lib/builtins/CMakeLists.txt
--- a/compiler-rt/lib/builtins/CMakeLists.txt
+++ b/compiler-rt/lib/builtins/CMakeLists.txt
@@ -24,6 +24,15 @@
     include(UseLibtool)
   endif()
   include(AddCompilerRT)
+
+  if(${CMAKE_SYSTEM_NAME} MATCHES "AIX")
+    set(CMAKE_C_ARCHIVE_CREATE "<CMAKE_AR> -X32_64 qc <TARGET> <LINK_FLAGS> <OBJECTS>")
+    set(CMAKE_CXX_ARCHIVE_CREATE "<CMAKE_AR> -X32_64 qc <TARGET> <LINK_FLAGS> <OBJECTS>")
+    set(CMAKE_C_ARCHIVE_APPEND "<CMAKE_AR> -X32_64 q <TARGET> <LINK_FLAGS> <OBJECTS>")
+    set(CMAKE_CXX_ARCHIVE_APPEND "<CMAKE_AR> -X32_64 q <TARGET> <LINK_FLAGS> <OBJECTS>")
+    set(CMAKE_C_ARCHIVE_FINISH "<CMAKE_RANLIB> -X32_64 <TARGET>")
+    set(CMAKE_CXX_ARCHIVE_FINISH "<CMAKE_RANLIB> -X32_64 <TARGET>")
+  endif()
 endif()
 
 if (COMPILER_RT_STANDALONE_BUILD)