Debug Yocto

Upon executing

bitbake image-full-galileo

Many things could happen.... But you use Debian and follow the steps I suggested, the errors should be in the following category.

Error on bitbake's logic

This happens only once for me, and is due to network instability. For example, bitbake cannot fetch certain package A (see Error during do_fetch), and other package B depends on A. Instead outputting error message "error in A's do_fetch procedure", it output error on B, because B doesn't have all its required packages.

Solution: Re-execute bitbake image-full-galileo and things might get back to normal.

Error during do_configure and do_compile

For some reason, building tasks may fail.

Solution: Re-execute bitbake image-full-galileo and things might get back to normal.

Error during do_fetch

You may see something like task 3874 failed (meta-oe/meta-oe/recipes-support/opencv_s.4.3.bb, do_fetch) This means bitbake cannot fetch the required package. Perhaps because your internet is down or unstable, or because the repository is really dead.

Solution: Re-execute bitbake image-full-galileo and see if the error persists. Find out the recipe corresponds to the failure (in the error message), which is opencv_s.4.3.bb in this case. Try to find a repository for the given package and provide the SRC_URI field with a valid link to that repository. For example, I found another repository http://pkgs.fedoraproject.org/repo/pkgs/opencv/OpenCV-2.4.3.tar.bz2/c0a5af4ff9d0d540684c0bf00ef35dbe/OpenCv-2.4.3.tar.bz2, so I changed the value of SRC_URI to that link.

Sometimes there is another check in the .bb file about the repository's check sum. Simply update SRC_URI[md5sum] or SRC_URI[sha256sum] to the new repository's checksum.