1*38fd1498Szrj /* Various diagnostic subroutines for the GNU C language.
2*38fd1498Szrj Copyright (C) 2000-2018 Free Software Foundation, Inc.
3*38fd1498Szrj Contributed by Gabriel Dos Reis <gdr@codesourcery.com>
4*38fd1498Szrj
5*38fd1498Szrj This file is part of GCC.
6*38fd1498Szrj
7*38fd1498Szrj GCC is free software; you can redistribute it and/or modify it under
8*38fd1498Szrj the terms of the GNU General Public License as published by the Free
9*38fd1498Szrj Software Foundation; either version 3, or (at your option) any later
10*38fd1498Szrj version.
11*38fd1498Szrj
12*38fd1498Szrj GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13*38fd1498Szrj WARRANTY; without even the implied warranty of MERCHANTABILITY or
14*38fd1498Szrj FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15*38fd1498Szrj for more details.
16*38fd1498Szrj
17*38fd1498Szrj You should have received a copy of the GNU General Public License
18*38fd1498Szrj along with GCC; see the file COPYING3. If not see
19*38fd1498Szrj <http://www.gnu.org/licenses/>. */
20*38fd1498Szrj
21*38fd1498Szrj #include "config.h"
22*38fd1498Szrj #include "system.h"
23*38fd1498Szrj #include "coretypes.h"
24*38fd1498Szrj #include "tm.h"
25*38fd1498Szrj #include "c-tree.h"
26*38fd1498Szrj #include "opts.h"
27*38fd1498Szrj
28*38fd1498Szrj /* Issue an ISO C99 pedantic warning MSGID if -pedantic outside C11 mode,
29*38fd1498Szrj otherwise issue warning MSGID if -Wc99-c11-compat is specified.
30*38fd1498Szrj This function is supposed to be used for matters that are allowed in
31*38fd1498Szrj ISO C11 but not supported in ISO C99, thus we explicitly don't pedwarn
32*38fd1498Szrj when C11 is specified. */
33*38fd1498Szrj
34*38fd1498Szrj bool
pedwarn_c99(location_t location,int opt,const char * gmsgid,...)35*38fd1498Szrj pedwarn_c99 (location_t location, int opt, const char *gmsgid, ...)
36*38fd1498Szrj {
37*38fd1498Szrj diagnostic_info diagnostic;
38*38fd1498Szrj va_list ap;
39*38fd1498Szrj bool warned = false;
40*38fd1498Szrj rich_location richloc (line_table, location);
41*38fd1498Szrj
42*38fd1498Szrj va_start (ap, gmsgid);
43*38fd1498Szrj /* If desired, issue the C99/C11 compat warning, which is more specific
44*38fd1498Szrj than -pedantic. */
45*38fd1498Szrj if (warn_c99_c11_compat > 0)
46*38fd1498Szrj {
47*38fd1498Szrj diagnostic_set_info (&diagnostic, gmsgid, &ap, &richloc,
48*38fd1498Szrj (pedantic && !flag_isoc11)
49*38fd1498Szrj ? DK_PEDWARN : DK_WARNING);
50*38fd1498Szrj diagnostic.option_index = OPT_Wc99_c11_compat;
51*38fd1498Szrj warned = diagnostic_report_diagnostic (global_dc, &diagnostic);
52*38fd1498Szrj }
53*38fd1498Szrj /* -Wno-c99-c11-compat suppresses even the pedwarns. */
54*38fd1498Szrj else if (warn_c99_c11_compat == 0)
55*38fd1498Szrj ;
56*38fd1498Szrj /* For -pedantic outside C11, issue a pedwarn. */
57*38fd1498Szrj else if (pedantic && !flag_isoc11)
58*38fd1498Szrj {
59*38fd1498Szrj diagnostic_set_info (&diagnostic, gmsgid, &ap, &richloc, DK_PEDWARN);
60*38fd1498Szrj diagnostic.option_index = opt;
61*38fd1498Szrj warned = diagnostic_report_diagnostic (global_dc, &diagnostic);
62*38fd1498Szrj }
63*38fd1498Szrj va_end (ap);
64*38fd1498Szrj return warned;
65*38fd1498Szrj }
66*38fd1498Szrj
67*38fd1498Szrj /* Issue an ISO C90 pedantic warning MSGID if -pedantic outside C99 mode,
68*38fd1498Szrj otherwise issue warning MSGID if -Wc90-c99-compat is specified, or if
69*38fd1498Szrj a specific option such as -Wlong-long is specified.
70*38fd1498Szrj This function is supposed to be used for matters that are allowed in
71*38fd1498Szrj ISO C99 but not supported in ISO C90, thus we explicitly don't pedwarn
72*38fd1498Szrj when C99 is specified. (There is no flag_c90.) */
73*38fd1498Szrj
74*38fd1498Szrj bool
pedwarn_c90(location_t location,int opt,const char * gmsgid,...)75*38fd1498Szrj pedwarn_c90 (location_t location, int opt, const char *gmsgid, ...)
76*38fd1498Szrj {
77*38fd1498Szrj diagnostic_info diagnostic;
78*38fd1498Szrj va_list ap;
79*38fd1498Szrj bool warned = false;
80*38fd1498Szrj rich_location richloc (line_table, location);
81*38fd1498Szrj
82*38fd1498Szrj va_start (ap, gmsgid);
83*38fd1498Szrj /* Warnings such as -Wvla are the most specific ones. */
84*38fd1498Szrj if (opt != OPT_Wpedantic)
85*38fd1498Szrj {
86*38fd1498Szrj int opt_var = *(int *) option_flag_var (opt, &global_options);
87*38fd1498Szrj if (opt_var == 0)
88*38fd1498Szrj goto out;
89*38fd1498Szrj else if (opt_var > 0)
90*38fd1498Szrj {
91*38fd1498Szrj diagnostic_set_info (&diagnostic, gmsgid, &ap, &richloc,
92*38fd1498Szrj (pedantic && !flag_isoc99)
93*38fd1498Szrj ? DK_PEDWARN : DK_WARNING);
94*38fd1498Szrj diagnostic.option_index = opt;
95*38fd1498Szrj diagnostic_report_diagnostic (global_dc, &diagnostic);
96*38fd1498Szrj warned = true;
97*38fd1498Szrj goto out;
98*38fd1498Szrj }
99*38fd1498Szrj }
100*38fd1498Szrj /* Maybe we want to issue the C90/C99 compat warning, which is more
101*38fd1498Szrj specific than -pedantic. */
102*38fd1498Szrj if (warn_c90_c99_compat > 0)
103*38fd1498Szrj {
104*38fd1498Szrj diagnostic_set_info (&diagnostic, gmsgid, &ap, &richloc,
105*38fd1498Szrj (pedantic && !flag_isoc99)
106*38fd1498Szrj ? DK_PEDWARN : DK_WARNING);
107*38fd1498Szrj diagnostic.option_index = OPT_Wc90_c99_compat;
108*38fd1498Szrj diagnostic_report_diagnostic (global_dc, &diagnostic);
109*38fd1498Szrj }
110*38fd1498Szrj /* -Wno-c90-c99-compat suppresses the pedwarns. */
111*38fd1498Szrj else if (warn_c90_c99_compat == 0)
112*38fd1498Szrj ;
113*38fd1498Szrj /* For -pedantic outside C99, issue a pedwarn. */
114*38fd1498Szrj else if (pedantic && !flag_isoc99)
115*38fd1498Szrj {
116*38fd1498Szrj diagnostic_set_info (&diagnostic, gmsgid, &ap, &richloc, DK_PEDWARN);
117*38fd1498Szrj diagnostic.option_index = opt;
118*38fd1498Szrj diagnostic_report_diagnostic (global_dc, &diagnostic);
119*38fd1498Szrj warned = true;
120*38fd1498Szrj }
121*38fd1498Szrj out:
122*38fd1498Szrj va_end (ap);
123*38fd1498Szrj return warned;
124*38fd1498Szrj }
125