10079 smatch Makefile changes for usr/src/lib

*** 20,29 ****
--- 20,30 ----
  #
  
  #
  # Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
  #
+ # Copyright (c) 2018, Joyent, Inc.
  
  SRCS = $(OBJECTS:%.o=../common/%.c)
  CSTD = $(CSTD_GNU99)
  CPPFLAGS += -I../common -I. -D_REENTRANT
  $(NOT_RELEASE_BUILD)CPPFLAGS += -DDEBUG
*** 31,40 ****
--- 32,43 ----
  
  CERRWARN += -_gcc=-Wno-type-limits
  CERRWARN += -_gcc=-Wno-uninitialized
  CERRWARN += -_gcc=-Wno-unused-label
  
+ SMOFF += all_func_returns
+ 
  ROOTLIBDIR = $(ROOTSCSILIBDIR)
  ROOTLIBDIR64 = $(ROOTSCSILIBDIR)/$(MACH64)
  
  DYNFLAGS32 += -R$(SCSILIBDIR)
  DYNFLAGS64 += -R$(SCSILIBDIR)/$(MACH64)