Change the way that the POSIX threads draft revision is determined from the user's perspective.  Instead of using AC_CHECK_LIB() to check for pthread_kill(), we now use AC_TRY_LINK() and use whatever library was added to $LIBS when checking to see if the pthreads library is installed. This eliminates duplicated code and makes the user-readable output more informative.
Change the way that the POSIX threads draft revision is determined from
the user's perspective.  Instead of using AC_CHECK_LIB() to check for
pthread_kill(), we now use AC_TRY_LINK() and use whatever library was
added to $LIBS when checking to see if the pthreads library is installed.
This eliminates duplicated code and makes the user-readable output more
informative.


git-svn-id: 769d22dfa2d22aad706b9a451492fb87c0735f19@278 08b38cba-cd3b-11de-854e-f91c5b6e4272

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