Octave requires approximately 125MB of disk storage to unpack and compile from source (significantly less if you don't compile with debugging symbols or create shared libraries). Once installed, Octave requires approximately 65MB of disk space (again, considerably less if you don't build shared libraries or the binaries and libraries do not include debugging symbols).
To compile Octave, you will need a recent version of GNU Make. You will also need g++ 2.7.2 or later. Version 2.8.0 or egcs 1.0.x should work. Later versions may work, but C++ is still evolving, so don't be too surprised if you run into some trouble.
It is no longer necessary to have libg++, but you do need to have the GNU implementation of libstdc++. If you are using g++ 2.7.2, libstdc++ is distributed along with libg++, but for later versions, libstdc++ is distributed separately. For egcs, libstdc++ is included with the compiler distribution.
<em>You must have gnu make to compile octave</em>. Octave's Makefiles use features of GNU Make that are not present in other versions of make. GNU Make is very portable and easy to install.
Currently, Octave can only be compiled with the GNU C++ compiler. It would be nice to make it possible to compile Octave with other C++ compilers, but the maintainers do not have sufficient time to devote to this. If you are interested in working to make Octave portable to other compilers, please contact email@example.com.
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