Robert P. J. DAY says:
According to Mike Frysinger, this patch was removed from Gentoo in the
2.3.x series and didn't seem to cause any adverse effects. So toss it
from the patch directories for glibc 2.5 and up.
7 prompt "C-library to use:"
13 select LIBC_SUPPORT_NPTL
14 select LIBC_SUPPORT_LINUXTHREADS
19 select LIBC_SUPPORT_LINUXTHREADS
28 default "glibc" if LIBC_GLIBC
29 default "uClibc" if LIBC_UCLIBC
31 config LIBC_SUPPORT_NPTL
35 config LIBC_SUPPORT_LINUXTHREADS
40 source config/libc_glibc.in
44 source config/libc_uClibc.in