SCons appears to build the same section multiple times

Question

When building, SCons appears to build a .os, then a .a, and then add the -fPIC to build a .so. Is there some way to trim down this build time?

Does SCons run in parallel like "make -j"?

Answer 1

SCons does support parallel builds using the -j/--jobs option.

In your example, you cannot build those three items - the .os, the .a and the .so in parallel. First, the .c or .cpp file has to be compiled to an .os, then the .os is compiled into a .a, then the .a is linked into the .so. That's basic compiler and linker processing.