Created attachment 6341 [details] busybox config Dynamically linked busybox: # ./busybox whoami root # ./busybox groups root bin daemon sys adm disk wheel floppy tape video Statically linked busybox: # ./busybox whoami whoami: unknown uid 0 # ./busybox groups 0groups: unknown ID 0 1groups: unknown ID 1 2groups: unknown ID 2 3groups: unknown ID 3 4groups: unknown ID 4 6groups: unknown ID 6 10groups: unknown ID 10 11groups: unknown ID 11 26groups: unknown ID 26 27groups: unknown ID 27 ... And many other applets, which use text uid/gid names (for example login cannot find user, etc) glibc 2.21, gcc 4.9.3 tried compiling busybox with gcc -O0 with same error.
*** Bug 8711 has been marked as a duplicate of this bug. ***
I'm sorry, this is glibc-releated bug BZ-17250, and fix is available : https://www.sourceware.org/ml/libc-alpha/2015-08/msg00091.html