Index: lldb/trunk/tools/debugserver/source/MacOSX/CMakeLists.txt
===================================================================
--- lldb/trunk/tools/debugserver/source/MacOSX/CMakeLists.txt
+++ lldb/trunk/tools/debugserver/source/MacOSX/CMakeLists.txt
@@ -66,13 +66,23 @@
   OUTPUT_STRIP_TRAILING_WHITESPACE
   OUTPUT_VARIABLE CODESIGN_ALLOCATE
   )
-add_custom_command(TARGET debugserver
-  POST_BUILD
-  # --entitlements option removed, as it causes errors when debugging.
-  #was: COMMAND CODESIGN_ALLOCATE=${CODESIGN_ALLOCATE} codesign --entitlements ${CMAKE_CURRENT_SOURCE_DIR}/../debugserver-entitlements.plist --force --sign ${CODESIGN_IDENTITY} debugserver
-  COMMAND ${CMAKE_COMMAND} -E env CODESIGN_ALLOCATE=${CODESIGN_ALLOCATE} codesign --force --sign ${CODESIGN_IDENTITY} debugserver
-  WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/bin
+# Older cmake versions don't support "-E env".
+if (${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION} LESS 3.2)
+  add_custom_command(TARGET debugserver
+    POST_BUILD
+    # Note: --entitlements option removed, as it causes errors when debugging.
+    # was: COMMAND CODESIGN_ALLOCATE=${CODESIGN_ALLOCATE} codesign --entitlements ${CMAKE_CURRENT_SOURCE_DIR}/../debugserver-entitlements.plist --force --sign ${CODESIGN_IDENTITY} debugserver
+    COMMAND CODESIGN_ALLOCATE=${CODESIGN_ALLOCATE} codesign --force --sign ${CODESIGN_IDENTITY} debugserver
+    WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/bin
+  )
+else()
+  add_custom_command(TARGET debugserver
+    POST_BUILD
+    # Note: --entitlements option removed (see comment above).
+    COMMAND ${CMAKE_COMMAND} -E env CODESIGN_ALLOCATE=${CODESIGN_ALLOCATE} codesign --force --sign ${CODESIGN_IDENTITY} debugserver
+    WORKING_DIRECTORY ${CMAKE_BINARY_DIR}/bin
   )
+endif()
 
 install(TARGETS debugserver
   RUNTIME DESTINATION bin