Add the Clang specific -Wmissing-variable-declarations to WARNS=6.

This compiler flag enforces that that people either mark variables
static or use an external declarations for the variable, similar to how
-Wmissing-prototypes works for functions.

Due to the fact that Yacc/Lex generate code that cannot trivially be
changed to not warn because of this (lots of yy* variables), add a
NO_WMISSING_VARIABLE_DECLARATIONS that can be used to turn off this
specific compiler warning.

Announced on:	toolchain@

6 files changed, 11 insertions, 0 deletions

diff --git a/usr.sbin/auditdistd/Makefile b/usr.sbin/auditdistd/Makefile
index 468290b..ee18bca 100644
--- a/usr.sbin/auditdistd/Makefile
+++ b/usr.sbin/auditdistd/Makefile
@@ -10,6 +10,7 @@ OPENBSMDIR=${.CURDIR}/../../contrib/openbsm
 CFLAGS+=-I${OPENBSMDIR} -I${OPENBSMDIR}/bin/auditdistd
 
 NO_WFORMAT=
+NO_WMISSING_VARIABLE_DECLARATIONS=
 
 PROG=	auditdistd
 SRCS=	auditdistd.c
diff --git a/usr.sbin/bluetooth/bthidd/Makefile b/usr.sbin/bluetooth/bthidd/Makefile
index dd0754d..fe6ef33 100644
--- a/usr.sbin/bluetooth/bthidd/Makefile
+++ b/usr.sbin/bluetooth/bthidd/Makefile
@@ -13,4 +13,6 @@ DEBUG_FLAGS=	-g
 DPADD=          ${LIBBLUETOOTH} ${LIBUSBHID}
 LDADD=		-lbluetooth -lusbhid
 
+NO_WMISSING_VARIABLE_DECLARATIONS=
+
 .include <bsd.prog.mk>
diff --git a/usr.sbin/bsnmpd/modules/Makefile.inc b/usr.sbin/bsnmpd/modules/Makefile.inc
index b5dad56..357b441 100644
--- a/usr.sbin/bsnmpd/modules/Makefile.inc
+++ b/usr.sbin/bsnmpd/modules/Makefile.inc
@@ -6,4 +6,6 @@ MANFILTER=	sed -e 's%@MODPATH@%${LIBDIR}/%g'		\
 		    -e 's%@DEFPATH@%${DEFSDIR}/%g'		\
 		    -e 's%@MIBSPATH@%${BMIBSDIR}/%g'
 
+NO_WMISSING_VARIABLE_DECLARATIONS=
+
 .include "../Makefile.inc"
diff --git a/usr.sbin/config/Makefile b/usr.sbin/config/Makefile
index 6faf847..6561989 100644
--- a/usr.sbin/config/Makefile
+++ b/usr.sbin/config/Makefile
@@ -11,6 +11,8 @@ kernconf.c: kernconf.tmpl
 
 CFLAGS+= -I. -I${.CURDIR}
 
+NO_WMISSING_VARIABLE_DECLARATIONS=
+
 DPADD=	${LIBL} ${LIBSBUF}
 LDADD=	-ll -lsbuf
 
diff --git a/usr.sbin/fifolog/lib/Makefile b/usr.sbin/fifolog/lib/Makefile
index c10126f..fc8e6d2 100644
--- a/usr.sbin/fifolog/lib/Makefile
+++ b/usr.sbin/fifolog/lib/Makefile
@@ -8,4 +8,6 @@ SRCS+=	getdate.y
 
 CFLAGS+= -I${.CURDIR}
 
+NO_WMISSING_VARIABLE_DECLARATIONS=
+
 .include <bsd.lib.mk>
diff --git a/usr.sbin/jail/Makefile b/usr.sbin/jail/Makefile
index 00d7ff5..fb36def 100644
--- a/usr.sbin/jail/Makefile
+++ b/usr.sbin/jail/Makefile
@@ -9,6 +9,8 @@ SRCS=	jail.c command.c config.c state.c jailp.h jaillex.l jailparse.y y.tab.h
 DPADD=	${LIBJAIL} ${LIBKVM} ${LIBUTIL} ${LIBL}
 LDADD=	-ljail -lkvm -lutil -ll
 
+NO_WMISSING_VARIABLE_DECLARATIONS=
+
 YFLAGS+=-v
 CFLAGS+=-I. -I${.CURDIR}