Hi All, While on the same row on osx note I have been trying to get row(at least the basic packages listed to be working) on my newly installed Lion. I am installing electric based on the instructions here http://www.ros.org/wiki/electric/Installation/OSX Here is the error message [rosbuild] Building package rosconsole [rosbuild] Cached build flags older than manifests; calling rospack to get flags [rosbuild] Including /Users/makokal/ros/ros_comm/clients/roslisp/cmake/roslisp.cmake [rosbuild] Including /Users/makokal/ros/ros_comm/clients/rospy/cmake/rospy.cmake [rosbuild] Including /Users/makokal/ros/ros_comm/clients/cpp/roscpp/cmake/roscpp.cmake -- Configuring done -- Generating done -- Build files have been written to: /Users/makokal/ros/ros_comm/tools/rosconsole/build cd build && make -l2 Scanning dependencies of target rospack_genmsg_libexe [ 0%] Built target rospack_genmsg_libexe Scanning dependencies of target rosbuild_precompile [ 0%] Built target rosbuild_precompile Scanning dependencies of target rosconsole [ 50%] Building CXX object CMakeFiles/rosconsole.dir/src/rosconsole/rosconsole.o /Users/makokal/ros/ros_comm/tools/rosconsole/src/rosconsole/rosconsole.cpp:686: internal compiler error: Segmentation fault: 11 Please submit a full bug report, with preprocessed source if appropriate. See for instructions. make[3]: *** [CMakeFiles/rosconsole.dir/src/rosconsole/rosconsole.o] Error 1 make[2]: *** [CMakeFiles/rosconsole.dir/all] Error 2 make[1]: *** [all] Error 2 I am having gcc4.2 which come from apple by default. I have also installed gcc44 from macports but that didn't change anything. I also followed a question on the same on answers.org(http://answers.ros.org/question/1653/compiler-segmantion-fault-durint-ros-installation), but there is not significant update on the same. I would appreciate ideas regards, billy