>>> rt-tests 2.7 Extracting
xzcat /home/buildroot/instance-0/dl/rt-tests/rt-tests-2.7.tar.xz | /home/buildroot/instance-0/output-1/host/bin/tar --strip-components=1 -C /home/buildroot/instance-0/output-1/build/rt-tests-2.7   -xf -
>>> rt-tests 2.7 Patching

Applying 0001-Fix-a-build-issue-with-uClibc-ng.patch using patch: 
patching file src/cyclictest/cyclictest.c
Hunk #1 FAILED at 58.
1 out of 1 hunk FAILED -- saving rejects to file src/cyclictest/cyclictest.c.rej
make: *** [package/pkg-generic.mk:241: /home/buildroot/instance-0/output-1/build/rt-tests-2.7/.stamp_patched] Error 1
make: Leaving directory '/home/buildroot/instance-0/buildroot'