grep-3.0 FAILS on Make phase

[rennes]

Hello,
I've opened a new ticket to report a new error in 'grep' package on Hurd 
(version 3.0 and 2.28).

https://debbugs.gnu.org/cgi/bugreport.cgi?bug=25821


/-------------------------------------------------------------/
 CC       localcharset.o
  CC       glthread/lock.o
glthread/lock.c: In function 'glthread_rwlock_init_for_glibc':
glthread/lock.c:53:3: warning: implicit declaration of function
'pthread_rwlockattr_setkind_np' [-Wimplicit-function-declaration]
   err = pthread_rwlockattr_setkind_np (&attributes,
   ^
glthread/lock.c:54:40: error:
'PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP' undeclared (first use in
this function)

PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP);
                                        ^
glthread/lock.c:54:40: note: each undeclared identifier is reported only
once for each function it appears in
Makefile:1711: recipe for target 'glthread/lock.o' failed
make[3]: *** [glthread/lock.o] Error 1
make[3]: Leaving directory '/tmp/guix-build-grep-3.0.drv-0/grep-3.0/lib'
Makefile:1478: recipe for target 'all' failed
make[2]: *** [all] Error 2
make[2]: Leaving directory '/tmp/guix-build-grep-3.0.drv-0/grep-3.0/lib'
Makefile:1291: recipe for target 'all-recursive' failed
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory '/tmp/guix-build-grep-3.0.drv-0/grep-3.0'
Makefile:1232: recipe for target 'all' failed
make: *** [all] Error 2
phase `build' failed after 5.3 seconds
/-------------------------------------------------------------/
Regards