[question] Cross-compilation with SCons and tool_requires

I am trying to setup cross-compilation with SCons where Conan provides the cross-compiler as a binary package. So, I have created a cross-compiler package which works fine with CMAKE when I add it as tool_requires and set the correct host profile.

For SCons however I am not sure how I can add the location of the cross-compiler binaries to the build environment. The SConscript_conan file does not contain anything regarding the packages installed via tool_requires. I would expect that they show up, so that I can add the BINPATH to the SCons environment. I can’t add the pakckage as normal requires because then the build and host environments don’t match anymore.

Does anyone have a suggestion what the recommend approach is for cross-compilation with SCons?

• I’ve read the CONTRIBUTING guide.

[memsharded]

Yes, for example something like:

def generate(self):
    buildenv= VirtualBuildEnv(self)
    for name, value in buildenv.vars().items():
         # save them in your desired format to a file. 
         # you can even generate a .py file with python code that activate the environment

The nice things about the new integrations:

• They explicitly differentiate between build-time and run-time environment
• They have explicit constructs for paths vs non-paths variables
• They have explicit management of clear/append/prepend/define semantics
• They are more configurable and flexible
• They also merge environment vars from the profiles [buildenv] and the dependencies self.buildenv_info (in package_info() of the dependencies)

[thesummer]

Interesting I didn’t know about this. Thanks.

If I understand it correctly, I should be able to prepare an environment file with only the few variables/paths I actually need. And the structure can be kept quite simple, so I can read it with Python standard functions. Neat.