Since vxworks' libc contains much of libatomic, in not-very-granular
modules, building all of libatomic doesn't work very well.
However, some expected entry points are not present in libc, so
arrange for libatomic to build only those missing bits.
for libatomic/ChangeLog
* configure.tgt: Set partial_libatomic on *-*-vxworks*.
* configure.ac (PARTIAL_VXWORKS): New AM_CONDITIONAL.
* Makefile.am (libatomic_la_SOURCES): Select few sources for
PARTIAL_VXWORKS.
* configure, Makefile.in: Rebuilt.
10360c1b0d