12365 pwritev64 can't write at offsets between [2 GiB, 4 GiB)
Portions contributed by: John Levon <john.levon@joyent.com>
Reviewed by: Patrick Mooney <patrick.mooney@joyent.com>
Reviewed by: Robert Mustacchi <rm@joyent.com>

*** 9,19 ****
  # http://www.illumos.org/license/CDDL.
  #
  
  #
  # Copyright (c) 2012, 2016 by Delphix. All rights reserved.
! # Copyright 2019 Joyent, Inc.
  #
  
  SUBDIRS_i386 = i386
  
  SUBDIRS =       \
--- 9,19 ----
  # http://www.illumos.org/license/CDDL.
  #
  
  #
  # Copyright (c) 2012, 2016 by Delphix. All rights reserved.
! # Copyright 2020 Joyent, Inc.
  #
  
  SUBDIRS_i386 = i386
  
  SUBDIRS =       \
*** 28,38 ****
                  spoof-ras \
                  stress \
                  $(SUBDIRS_$(MACH))
  
  PROGS = \
!         odirectory
  
  CPPFLAGS += -D_REENTRANT
  PROGS32 = $(PROGS:%=%.32)
  PROGS64 = $(PROGS:%=%.64)
  
--- 28,39 ----
                  spoof-ras \
                  stress \
                  $(SUBDIRS_$(MACH))
  
  PROGS = \
!         odirectory \
!         writev
  
  CPPFLAGS += -D_REENTRANT
  PROGS32 = $(PROGS:%=%.32)
  PROGS64 = $(PROGS:%=%.64)
  
*** 42,51 ****
--- 43,56 ----
          $(SCRIPTS:%=$(ROOTOPTDIR)/%)
  
  odirectory.32 :=        LDLIBS += -lsocket
  odirectory.64 :=        LDLIBS64 += -lsocket
  
+ writev.32 :=            CPPFLAGS += -D_FILE_OFFSET_BITS=64
+ writev.32 :=            CSTD = $(CSTD_GNU99)
+ writev.64 :=            CSTD = $(CSTD_GNU99)
+ 
  include $(SRC)/cmd/Makefile.cmd
  
  all     :=      TARGET = all
  install :=      TARGET = install
  clean   :=      TARGET = clean