To check the prerequisites for Kaldi, first run

extras/check_dependencies.sh

and see if there are any system-level installations you need to do. Check the

output carefully. There are some things that will make your life a lot easier

if you fix them at this stage. If your system default C++ compiler is not

supported, you can do the check with another compiler by setting the CXX

environment variable, e.g.

CXX=g++-4.8 extras/check_dependencies.sh

Then run

make

which by default will install ATLAS headers, OpenFst, SCTK and sph2pipe.

OpenFst requires a relatively recent C++ compiler with C++11 support, e.g.

g++ >= 4.7, Apple clang >= 5.0 or LLVM clang >= 3.3. If your system default

compiler does not have adequate support for C++11, you can specify a C++11

compliant compiler as a command argument, e.g.

make CXX=g++-4.8

If you have multiple CPUs and want to speed things up, you can do a parallel

build by supplying the "-j" option to make, e.g. to use 4 CPUs

make -j 4

In extras/, there are also various scripts to install extra bits and pieces that

are used by individual example scripts. If an example script needs you to run

one of those scripts, it will tell you what to do.