mkdir -p $llvmCore_phase1_objdir
mkdir -p $llvmCore_phase1_installdir
mkdir -p $llvmCore_phase2_objdir
mkdir -p $llvmCore_phase2_installdir
mkdir -p $llvmCore_phase1_objdir
mkdir -p $llvmCore_phase1_installdir
mkdir -p $llvmCore_phase2_objdir
mkdir -p $llvmCore_phase2_installdir