http://root.cern.ch/drupal/content/building-root-cmake

mkdir <workdir>
cd <workdir>
cmake <srcdir> [-DCMAKE_INSTALL_PREFIX=<installdir>] [see possible options later]
make                      [or, make -j n for n core machines]
make install


-DCMAKE_BUILD_TYPE=Debug     # Other build types: Release, RelWithDebInfo, MinSizeRe
-DCMAKE_INSTALL_PREFIX=<installdir> # installation prefix
-DCMAKE_C_COMPILER=gcc       # What C compiler to use
-DCMAKE_CXX_COMPILER=c++     # What C++ compiler to use
-DCMAKE_F_COMPILER=gfortran  # What fortran compiler to use
-DCMAKE_LINKER=ld            # What linker program to use
 
-Dgnuinstall=ON|OFF          # Perform installation following the GNU guidelines
-Dfail-on-missing=ON|OFF     # Fail the configure step if a required external package is missing
-Dall=ON|OFF                 # Enable all optional components
-Dtesting=ON|OFF             # Enable testing with CTest (tests defined and environemnt prepared)
-Droottest=ON|OFF            # Include roottest tests, if roottest subdirectory exists or if it is a sibling directory
 
-Dxxxx=ON                    # Switch optional ROOT component ON (e.g. tmva, mathcode, gdml, etc.)
-Dyyyy=OFF                   # Switch optional ROOT component OFF


Xcode

Generate the Xcode project with cmake -G "Xcode" <ROOT source>. Open the generated file with the Xcode application.


Clean cache
rm CMakeCache.txt
cmake -U *

cmake --help-variable-list