In dunfell, building for an x86_64 target without multilib, one externally-built binary missed /lib64/ld-linux-x86-64.so.2, so I'm adding a symlink in a separate package using:

do_install_append_x86-64() {
    mkdir ${D}/lib64
    ln -s /lib/ld-linux-x86-64.so.2 ${D}/lib64/
}
FILES_${PN} += "/lib64/ld-linux-x86-64.so.2"


This explodes with the following:

ERROR: Error executing a python function in exec_python_func() autogenerated:

The stack trace of python calls that resulted in this exception/failure was:
File: 'exec_python_func() autogenerated', lineno: 2, function: <module>
     0001:
 *** 0002:do_package_qa(d)
     0003:
File: '/home/yann/yocto/meta-blade/meta-shadow-os/poky/meta/classes/insane.bbclass', lineno: 1044, function: do_package_qa
     1040:    warn_checks, error_checks = parse_test_matrix("QARECIPETEST")
     1041:    package_qa_recipe(warn_checks, error_checks, pn, d)
     1042:
     1043:    if 'libdir' in d.getVar("ALL_QA").split():
 *** 1044:        package_qa_check_libdir(d)
     1045:
     1046:    qa_sane = d.getVar("QA_SANE")
     1047:    if not qa_sane:
     1048:        bb.fatal("QA run found fatal errors. Please consider fixing them.")
File: '/home/yann/yocto/meta-blade/meta-shadow-os/poky/meta/classes/insane.bbclass', lineno: 275, function: package_qa_check_libdir
     0271:                    if base_libdir not in rel_path:
     0272:                        # make sure it's an actual ELF file
     0273:                        elf = oe.qa.ELFFile(full_path)
     0274:                        try:
 *** 0275:                            elf.open()
     0276:                            messages.append("%s: found library in wrong location: %s" % (package, rel_path))
     0277:                        except (oe.qa.NotELFFileError):
     0278:                            pass
     0279:                if exec_re.match(rel_path):
File: '/home/yann/yocto/meta-blade/meta-shadow-os/poky/meta/lib/oe/qa.py', lineno: 55, function: open
     0051:        if self.data:
     0052:            self.data.close()
     0053:
     0054:    def open(self):
 *** 0055:        with open(self.name, "rb") as f:
     0056:            try:
     0057:                self.data = mmap.mmap(f.fileno(), 0, access=mmap.ACCESS_READ)
     0058:            except ValueError:
     0059:                # This means the file is empty


RDEPENDS_${PN} += "glibc" will not help.

Looks like I have to avoid this with INSANE_SKIP_${PN} += "libdir"