Change default CMake version, Ubuntu 14.04 -

as far i've understood, need use @ least cmake 3.1 in order use c++11. ubuntu 14.04 comes 2.8.x.

i followed guide suggesting 1 should install cmake /opt, have cmake installed /opt/cmake-3.2.1-linux-x86_64 , added /opt/cmake-3.2.1-linux-x86_64/bin path (as first element) in .bashrc.

if try apt-get remove cmake process wants remove not cmake ros (so yes, i've stopped ubuntu: upgrading software (cmake) - version disambiguation (local compile), conclude couldn't use answers)

result of cmake --version:

cmake version 3.2.1 

setting minimum required version 3.1 , running catkin_make in same terminal yields:

cmake 3.1 or higher required.  running version 2.8.12.2 

how can make catkin use new (/correct) version of cmake?

two things going on here:

1. according catkin_make file, isn't copying shell environment python subprocess 'cmake' invocation.

catkin_make:

... if args.no_color:     run_command(cmd, build_path) else:     run_command_colorized(cmd, build_path) 

builder.py:

def run_command(cmd, cwd, quiet=false, colorize=false, add_env=none):     ...     env = none     if add_env:         env = copy.copy(os.environ)         env.update(add_env)     try:         proc = subprocess.popen(             cmd, cwd=cwd, shell=false,             stdout=stdout_pipe, stderr=stderr_pipe,             env=env         ) 

you can modify appropriate lines in catkin_make script pass empty dictionary add_env, , should attempt copy environment spawned sub process:

if args.no_color:     run_command(cmd, build_path, add_env={}) else:     run_command_colorized(cmd, build_path, add_env={}) 

this should modify path , let find appropriate cmake version, i'm not sure alone solves original question, leading to...

2. if attempting use c++11 when building catkin, add -std=c++11 compiler flag cmake_cxx_flags:

catkin_make --cmake-flags "-dcmake_cxx_flags=\${cmake_cxx_flags};-std=c++11"

or modify cmakelists.txt: set(cmake_cxx_flags "${cmake_cxx_flags} -std=c++11")