1 /* Various diagnostic subroutines for the GNU C language.
2 Copyright (C) 2000-2019 Free Software Foundation, Inc.
3 Contributed by Gabriel Dos Reis <gdr@codesourcery.com>
4
5 This file is part of GCC.
6
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
10 version.
11
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
20
21 #include "config.h"
22 #include "system.h"
23 #include "coretypes.h"
24 #include "tm.h"
25 #include "c-tree.h"
26 #include "opts.h"
27
28 /* Issue an ISO C11 pedantic warning MSGID if -pedantic outside C2X mode,
29 otherwise issue warning MSGID if -Wc11-c2X-compat is specified.
30 This function is supposed to be used for matters that are allowed in
31 ISO C2X but not supported in ISO C11, thus we explicitly don't pedwarn
32 when C2X is specified. */
33
34 bool
pedwarn_c11(location_t location,int opt,const char * gmsgid,...)35 pedwarn_c11 (location_t location, int opt, const char *gmsgid, ...)
36 {
37 diagnostic_info diagnostic;
38 va_list ap;
39 bool warned = false;
40 rich_location richloc (line_table, location);
41
42 va_start (ap, gmsgid);
43 /* If desired, issue the C11/C2X compat warning, which is more specific
44 than -pedantic. */
45 if (warn_c11_c2x_compat > 0)
46 {
47 diagnostic_set_info (&diagnostic, gmsgid, &ap, &richloc,
48 (pedantic && !flag_isoc2x)
49 ? DK_PEDWARN : DK_WARNING);
50 diagnostic.option_index = OPT_Wc11_c2x_compat;
51 warned = diagnostic_report_diagnostic (global_dc, &diagnostic);
52 }
53 /* -Wno-c11-c2x-compat suppresses even the pedwarns. */
54 else if (warn_c11_c2x_compat == 0)
55 ;
56 /* For -pedantic outside C2X, issue a pedwarn. */
57 else if (pedantic && !flag_isoc2x)
58 {
59 diagnostic_set_info (&diagnostic, gmsgid, &ap, &richloc, DK_PEDWARN);
60 diagnostic.option_index = opt;
61 warned = diagnostic_report_diagnostic (global_dc, &diagnostic);
62 }
63 va_end (ap);
64 return warned;
65 }
66
67 /* Issue an ISO C99 pedantic warning MSGID if -pedantic outside C11 mode,
68 otherwise issue warning MSGID if -Wc99-c11-compat is specified.
69 This function is supposed to be used for matters that are allowed in
70 ISO C11 but not supported in ISO C99, thus we explicitly don't pedwarn
71 when C11 is specified. */
72
73 bool
pedwarn_c99(location_t location,int opt,const char * gmsgid,...)74 pedwarn_c99 (location_t location, int opt, const char *gmsgid, ...)
75 {
76 diagnostic_info diagnostic;
77 va_list ap;
78 bool warned = false;
79 rich_location richloc (line_table, location);
80
81 va_start (ap, gmsgid);
82 /* If desired, issue the C99/C11 compat warning, which is more specific
83 than -pedantic. */
84 if (warn_c99_c11_compat > 0)
85 {
86 diagnostic_set_info (&diagnostic, gmsgid, &ap, &richloc,
87 (pedantic && !flag_isoc11)
88 ? DK_PEDWARN : DK_WARNING);
89 diagnostic.option_index = OPT_Wc99_c11_compat;
90 warned = diagnostic_report_diagnostic (global_dc, &diagnostic);
91 }
92 /* -Wno-c99-c11-compat suppresses even the pedwarns. */
93 else if (warn_c99_c11_compat == 0)
94 ;
95 /* For -pedantic outside C11, issue a pedwarn. */
96 else if (pedantic && !flag_isoc11)
97 {
98 diagnostic_set_info (&diagnostic, gmsgid, &ap, &richloc, DK_PEDWARN);
99 diagnostic.option_index = opt;
100 warned = diagnostic_report_diagnostic (global_dc, &diagnostic);
101 }
102 va_end (ap);
103 return warned;
104 }
105
106 /* Issue an ISO C90 pedantic warning MSGID if -pedantic outside C99 mode,
107 otherwise issue warning MSGID if -Wc90-c99-compat is specified, or if
108 a specific option such as -Wlong-long is specified.
109 This function is supposed to be used for matters that are allowed in
110 ISO C99 but not supported in ISO C90, thus we explicitly don't pedwarn
111 when C99 is specified. (There is no flag_c90.) */
112
113 bool
pedwarn_c90(location_t location,int opt,const char * gmsgid,...)114 pedwarn_c90 (location_t location, int opt, const char *gmsgid, ...)
115 {
116 diagnostic_info diagnostic;
117 va_list ap;
118 bool warned = false;
119 rich_location richloc (line_table, location);
120
121 va_start (ap, gmsgid);
122 /* Warnings such as -Wvla are the most specific ones. */
123 if (opt != OPT_Wpedantic)
124 {
125 int opt_var = *(int *) option_flag_var (opt, &global_options);
126 if (opt_var == 0)
127 goto out;
128 else if (opt_var > 0)
129 {
130 diagnostic_set_info (&diagnostic, gmsgid, &ap, &richloc,
131 (pedantic && !flag_isoc99)
132 ? DK_PEDWARN : DK_WARNING);
133 diagnostic.option_index = opt;
134 diagnostic_report_diagnostic (global_dc, &diagnostic);
135 warned = true;
136 goto out;
137 }
138 }
139 /* Maybe we want to issue the C90/C99 compat warning, which is more
140 specific than -pedantic. */
141 if (warn_c90_c99_compat > 0)
142 {
143 diagnostic_set_info (&diagnostic, gmsgid, &ap, &richloc,
144 (pedantic && !flag_isoc99)
145 ? DK_PEDWARN : DK_WARNING);
146 diagnostic.option_index = OPT_Wc90_c99_compat;
147 diagnostic_report_diagnostic (global_dc, &diagnostic);
148 }
149 /* -Wno-c90-c99-compat suppresses the pedwarns. */
150 else if (warn_c90_c99_compat == 0)
151 ;
152 /* For -pedantic outside C99, issue a pedwarn. */
153 else if (pedantic && !flag_isoc99)
154 {
155 diagnostic_set_info (&diagnostic, gmsgid, &ap, &richloc, DK_PEDWARN);
156 diagnostic.option_index = opt;
157 diagnostic_report_diagnostic (global_dc, &diagnostic);
158 warned = true;
159 }
160 out:
161 va_end (ap);
162 return warned;
163 }
164