How it works

The nb2 program is used to run the user's compiler, or make, or a compilation script, or any other program that would be used to compile the user's program. So for instance, instead of typing

f77 program.f -llapack -lblas
the user would type
nb2 f77 program.f -llapack -lblas
Or instead of typing
make program
the user would type
nb2 make program
nb2 then runs the supplied command in an altered environment, which has its PATH variable modified to have a directory prepended to it. That directory contains shims which have the same name as compilers and linkers that nb2 needs to intercept.

Whenever one of those compilers or linkers is invoked - either directly from nb2, by make, or by some other compilation tool, the shim is run instead of the real compiler. The shim then parses the compiler's arguments looking for names of libraries that need to be linked in. If those libraries are not installed on the system, the shim then downloads them, verifies their signatures, and extracts them into an empty directory. Finally the real compiler or linker is then run with a modified argument list that causes the newly-downloaded libraries to be linked in along with the user's program and any native libraries that are used.

For more information, see the NetBuild documentation.

Jan 16 2017 Contact: Admin Login