GNU make manual 翻译( 一百一十三)

`.ONESHELL'
     If `.ONESHELL' is mentioned as a target, then when a target is
     built all lines of the recipe will be given to a single invocation
     of the shell rather than each line being invoked separately (*note
     Recipe Execution: Execution.).

`.POSIX'
     If `.POSIX' is mentioned as a target, then the makefile will be
     parsed and run in POSIX-conforming mode.  This does _not_ mean
     that only POSIX-conforming makefiles will be accepted: all advanced
     GNU `make' features are still available.  Rather, this target
     causes `make' to behave as required by POSIX in those areas where
     `make''s default behavior differs.

     In particular, if this target is mentioned then recipes will be
     invoked as if the shell had been passed the `-e' flag: the first
     failing command in a recipe will cause the recipe to fail
     immediately.

   Any defined implicit rule suffix also counts as a special target if
it appears as a target, and so does the concatenation of two suffixes,
such as `.c.o'.  These targets are suffix rules, an obsolete way of
defining implicit rules (but a way still widely used).  In principle,
any target name could be special in this way if you break it in two and
add both pieces to the suffix list.  In practice, suffixes normally
begin with `.', so these special target names also begin with `.'.
*Note Old-Fashioned Suffix Rules: Suffix Rules.