Cross Compiler Portability

[ethanmw]

On Debian 9 stretch, the gcc configure fails with this error:

checking how to run the C++ preprocessor... /lib/cpp
configure: error: in `/tmp/tmp.Ifz6SIKmzO/gcc-8.2.0-elf-objs/gcc':
configure: error: C++ preprocessor "/lib/cpp" fails sanity check
See `config.log' for more details.
Makefile:4200: recipe for target 'configure-gcc' failed
make: *** [configure-gcc] Error 1

[ethanmw]

#155

[dsmith47]

Can't comment on distro differences (yet), but I was able to get build-cross-compiler.sh on Ubuntu17 as installing the dev libs necessary.

This bug may be a wider problem of varying mileage across distros.

[dthain]

Distro differences are a real pain. It would probably be best, when addressing the compiling script, to carefully document what flavor of Linux that it succeeds or fails on.

[ethanmw]

Question as we decide on a strategy to verify certain distros: how platform-independent is the cross-compiler? That is, is it sufficient to test if the cross-compiler successfully compiles for a particular distro? My understanding is that once you have the cross-compiler working, compiling Basekernel should not be affected by the underlying distro

[dthain]

I think it is sufficient to evaluate, for a distro X, can you start on X, build the cross-compiler, then run a VM with basekernel on that same machine. I don't think there is much to be gained by attempting to compile and run on different machines.

[dthain]

If this was fixed by #155, please close it out.

[ethanmw]

It was not. #155 allowed it to compile on Mac, but it still failed Debian. Doug however reported that it runs on Ubuntu, but we have yet to check it on RHEL, which you indicated was a primary target. Debian seems like a likely wontfix, but I can check RHEL this week, add a list of distros to the wiki, and close this out.