[Scons-users] Build obj only if not everything is up to date

[Roman Karlstetter]

Hi,

I have the following problem:

I have a version.cpp file which makes use of __DATE__ and __TIME__ macros to indicate when the build was performed. I can use the AlwaysBuild functionality of scons to always build the respective object. However, this has the (expected) implication that the final binary always gets rebuilt, because version.obj always has changed.

It would be better for us to only rebuild the "version.obj" if there are changes to other dependencies that force a rebuild of the binary (or to version.cpp, of course), such that when nothing in the directory has changed, nothing is rebuilt. Is something like that possible at all with scons?

Thanks in advance and kind regards,
Roman