static linking with libpthread while using pthread_cond_timeout() fails

[Mike Frysinger <vapier at gentoo dot org>]

trying to link something simple like:
$ cat test.c
main(){pthread_cond_timeout();}
$ gcc -static test.c -lpthread
/usr/lib/gcc/x86_64-pc-linux-gnu/4.2.2/../../../../lib64/libpthread.a(pthread_cond_timedwait.o): 
In function `pthread_cond_timedwait':
(.text+0xa7): undefined reference to `__vdso_clock_gettime'
collect2: ld returned 1 exit status

if static linking isnt going to be supported in glibc and in fact has known 
bugs, then why are static archives built up/installed at all ?
-mike

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