[src/trunk]: src/usr.bin/xlint/lint1 teach lint __attribute__((__unused__))

[christos <christos%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/a89f6d778849
branches:  trunk
changeset: 820052:a89f6d778849
user:      christos <christos%NetBSD.org@localhost>
date:      Tue Dec 27 21:52:35 2016 +0000

description:
teach lint __attribute__((__unused__))

diffstat:

 usr.bin/xlint/lint1/cgram.y    |   8 +++++---
 usr.bin/xlint/lint1/decl.c     |  11 +++++++++--
 usr.bin/xlint/lint1/externs1.h |   3 ++-
 usr.bin/xlint/lint1/lint1.h    |   3 ++-
 4 files changed, 18 insertions(+), 7 deletions(-)

diffs (103 lines):

diff -r 74494a811b7c -r a89f6d778849 usr.bin/xlint/lint1/cgram.y
--- a/usr.bin/xlint/lint1/cgram.y       Tue Dec 27 21:52:01 2016 +0000
+++ b/usr.bin/xlint/lint1/cgram.y       Tue Dec 27 21:52:35 2016 +0000
@@ -1,5 +1,5 @@
 %{
-/* $NetBSD: cgram.y,v 1.81 2016/11/05 01:09:30 christos Exp $ */
+/* $NetBSD: cgram.y,v 1.82 2016/12/27 21:52:35 christos Exp $ */
 
 /*
  * Copyright (c) 1996 Christopher G. Demetriou.  All Rights Reserved.
@@ -35,7 +35,7 @@
 
 #include <sys/cdefs.h>
 #if defined(__RCSID) && !defined(lint)
-__RCSID("$NetBSD: cgram.y,v 1.81 2016/11/05 01:09:30 christos Exp $");
+__RCSID("$NetBSD: cgram.y,v 1.82 2016/12/27 21:52:35 christos Exp $");
 #endif
 
 #include <stdlib.h>
@@ -516,7 +516,9 @@
        | T_AT_GNU_INLINE
        | T_AT_FORMAT T_LPARN type_attribute_format_type T_COMMA
            constant T_COMMA constant T_RPARN
-       | T_AT_UNUSED
+       | T_AT_UNUSED {
+               addused();
+       }
        | T_AT_WEAK
        | T_AT_VISIBILITY T_LPARN constant T_RPARN
        | T_QUAL {
diff -r 74494a811b7c -r a89f6d778849 usr.bin/xlint/lint1/decl.c
--- a/usr.bin/xlint/lint1/decl.c        Tue Dec 27 21:52:01 2016 +0000
+++ b/usr.bin/xlint/lint1/decl.c        Tue Dec 27 21:52:35 2016 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: decl.c,v 1.66 2016/11/03 22:08:30 kamil Exp $ */
+/* $NetBSD: decl.c,v 1.67 2016/12/27 21:52:35 christos Exp $ */
 
 /*
  * Copyright (c) 1996 Christopher G. Demetriou.  All Rights Reserved.
@@ -38,7 +38,7 @@
 
 #include <sys/cdefs.h>
 #if defined(__RCSID) && !defined(lint)
-__RCSID("$NetBSD: decl.c,v 1.66 2016/11/03 22:08:30 kamil Exp $");
+__RCSID("$NetBSD: decl.c,v 1.67 2016/12/27 21:52:35 christos Exp $");
 #endif
 
 #include <sys/param.h>
@@ -537,6 +537,12 @@
                setpackedsize(dcs->d_type);
 }
 
+void
+addused(void)
+{
+       dcs->d_used = 1;
+}
+
 /*
  * Remember a qualifier which is part of the declaration specifiers
  * (and not the declarator) in the top element of the declaration stack.
@@ -2365,6 +2371,7 @@
        if (sym->s_type->t_tspec != VOID)
                (void)length(sym->s_type, sym->s_name);
 
+       sym->s_used = dcs->d_used;
        setsflg(sym);
 
        return (sym);
diff -r 74494a811b7c -r a89f6d778849 usr.bin/xlint/lint1/externs1.h
--- a/usr.bin/xlint/lint1/externs1.h    Tue Dec 27 21:52:01 2016 +0000
+++ b/usr.bin/xlint/lint1/externs1.h    Tue Dec 27 21:52:35 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: externs1.h,v 1.33 2016/12/24 17:43:45 christos Exp $   */
+/*     $NetBSD: externs1.h,v 1.34 2016/12/27 21:52:35 christos Exp $   */
 
 /*
  * Copyright (c) 1994, 1995 Jochen Pohl
@@ -145,6 +145,7 @@
 extern void    addtype(type_t *);
 extern void    addqual(tqual_t);
 extern void    addpacked(void);
+extern void    addused(void);
 extern void    pushdecl(scl_t);
 extern void    popdecl(void);
 extern void    setasm(void);
diff -r 74494a811b7c -r a89f6d778849 usr.bin/xlint/lint1/lint1.h
--- a/usr.bin/xlint/lint1/lint1.h       Tue Dec 27 21:52:01 2016 +0000
+++ b/usr.bin/xlint/lint1/lint1.h       Tue Dec 27 21:52:35 2016 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: lint1.h,v 1.29 2014/07/20 23:00:49 dholland Exp $ */
+/* $NetBSD: lint1.h,v 1.30 2016/12/27 21:52:35 christos Exp $ */
 
 /*
  * Copyright (c) 1996 Christopher G. Demetriou.  All Rights Reserved.
@@ -344,6 +344,7 @@
        u_int   d_notyp : 1;    /* set if no type specifier was present */
        u_int   d_asm : 1;      /* set if d_ctx == AUTO and asm() present */
        u_int   d_ispacked : 1; /* packed */
+       u_int   d_used : 1;     /* used */
        type_t  *d_tagtyp;      /* tag during member declaration */
        sym_t   *d_fargs;       /* list of arguments during function def. */
        pos_t   d_fdpos;        /* position of function definition */