/usr/src/lib/libc/gen/aux.c:106: error: 'AT_TIMEKEEP' undeclared

I'm trying to rebuild libc with debugging symbols.
I did:

# cd /usr/src/lib/libc
# make all install DEBUG_FLAGS='-g'

and got:

cc  -O2 -pipe  -I/usr/src/lib/libc/include -I/usr/src/lib/libc/../../include -I/
usr/src/lib/libc/ia64 -DNLS  -D__DBINTERFACE_PRIVATE -I/usr/src/lib/libc/../../c
ontrib/gdtoa -DINET6 -I/usr/src/lib/libc -I/usr/src/lib/libc/resolv -D_ACL_PRIVA
TE -DPOSIX_MISTAKE -I/usr/src/lib/libc/../../contrib/jemalloc/include -I/usr/src
/lib/libc/../../contrib/tzcode/stdtime -I/usr/src/lib/libc/stdtime -I/usr/src/li
b/libc/locale -DBROKEN_DES -DPORTMAP -DDES_BUILTIN -I/usr/src/lib/libc/rpc -DYP
-DNS_CACHING -DSYMBOL_VERSIONING -std=gnu99 -Wsystem-headers -Werror -Wall -Wno-
format-y2k -Wno-uninitialized -Wno-pointer-sign -c /usr/src/lib/libc/gen/aux.c -
o aux.o
/usr/src/lib/libc/gen/aux.c: In function 'init_aux':
/usr/src/lib/libc/gen/aux.c:106: error: 'AT_TIMEKEEP' undeclared (first use in t
his function)
/usr/src/lib/libc/gen/aux.c:106: error: (Each undeclared identifier is reported
only once
/usr/src/lib/libc/gen/aux.c:106: error: for each function it appears in.)
/usr/src/lib/libc/gen/aux.c: In function '_elf_aux_info':
/usr/src/lib/libc/gen/aux.c:171: error: 'AT_TIMEKEEP' undeclared (first use in t
his function)
*** [aux.o] Error code 1

I then did

# make clean
# make

and got the same error.

This is on 238585 ia64.

Perhaps I can't just build libc on its own?

Please advise

Thanks

Anton