[Scons-users] SCons stays in top-level directory or not?

[Dan Pidcock]

On 8 February 2013 13:28, Gary Oberbrunner <garyo at oberbrunner.com> wrote:

> SCons works in two phases.  In the first, it reads all the SConscripts and

> builds the dependency graph.  In the second, it builds whatever is needed by

> executing the graph.  The file nodes in the graph know the full path to each

> file.

>

> In the first phase, reading the SConscripts, SCons changes into the dir of

> each SConscript (variant if that's enabled), so paths relative to the

> SConscript work (your "printing ." above).  In the second (build) phase,

> SCons stays in the top dir and executes all commands with the proper paths

> from there.

>

> SCons can be made to cd into each target's dir before executing its

> command(s), but that's not recommended because it breaks parallel builds

> since any process can only have one current dir across all threads.


Ah that makes sense - thanks.

Dan