Solaris 10 nanosleep link failure

[Jim Meyering]

FYI, building latest coreutils on Solaris 10,
I get this failure:

    CCLD     sort
  Undefined                       first referenced
   symbol                             in file
  nanosleep                           ../lib/libcoreutils.a(xnanosleep.o)
  ld: fatal: Symbol referencing errors. No output written to sort
  collect2: ld returned 1 exit status
  make[3]: *** [sort] Error 1

I'll look into it tomorrow if no one beats me to it ;-)