This package supports working with patch files using quilt. To regenerate the quilt series file run: ./gen-quilt-series.sh Setup environment: export QUILT_PATCHES=$PWD Setup the source: ./quilt-patch.sh Create a new patch: cd glibc-2.17-c758a686/ quilt new glibc-rh1234622.patch quilt add ports/sysdeps/unix/sysv/linux/aarch64/nptl/libpthread.abilist vi ports/sysdeps/unix/sysv/linux/aarch64/nptl/libpthread.abilist quilt refresh cd .. git add glibc-rh1234622.patch e.g. ... PatchXXXX: glibc-rh1234622.patch ... %patchXXXX -p1 ... git add glibc.spec git commit You're done!