10079 smatch Makefile changes for usr/src/lib

@@ -21,10 +21,11 @@
 
 #
 # Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 # Use is subject to license terms.
 #
+# Copyright (c) 2018, Joyent, Inc.
 
 SHELL=/usr/bin/ksh93
 
 LIBRARY=        libsum.a
 VERS=           .1

@@ -74,10 +75,12 @@
 CFLAGS64 += \
         $(ASTCFLAGS64)
 
 CERRWARN        += -_gcc=-Wno-parentheses
 
+SMOFF += all_func_returns
+
 # This codepath is performance-critical
 sparc_COPTFLAG=-xO5 -_cc=-xprefetch=auto,explicit
 sparcv9_COPTFLAG=-xO5 -_cc=-xprefetch=auto,explicit
 i386_COPTFLAG=-_cc=-xO5 -_cc=-xprefetch=auto,explicit
 amd64_COPTFLAG=-_cc=-xO5  -_cc=-xprefetch=auto,explicit