Question

How do you guys pass valued parameter to scons ? I went through its documentation and unfortunately it’s still unclear to me. I’ve never used it before.

Please consider this build script.

Here is code snippet from it

add_option( "boost-version", "boost version for linking(1_38)" , 1 , True , "boostVersion" )

boostVersion = GetOption( "boostVersion" )
if boostVersion is None:
    boostVersion = ""
else:
    boostVersion = "-" + boostVersion

I tried calling scons --boost-version=1.51 and tried scons --boostVersion=1.51 and none of it worked.

Answer 1

You could use arguments:

You call scons boost-version=1.51 on the commandline

Then, to fetch the value in the SConscript:

boostVersion = defaultBoostVersion
if 'boost-version' in ARGUMENTS: 
  boostVersion = ARGUMENTS["boost-version"]

or, as elmo suggested:

boostVersion = ARGUMENTS.get("boost-version", defaultBoostVersion)

The scons documentation have more information the same page also describe how to use
AddOption command that you have tried earlier. It can be used also, but arguments are (to me at least) easier to understand.