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diagnostics.h revision 1.1.1.2 
      1 /* Copyright (C) 2017-2020 Free Software Foundation, Inc.
      2 
      3    This program is free software; you can redistribute it and/or modify
      4    it under the terms of the GNU General Public License as published by
      5    the Free Software Foundation; either version 3 of the License, or
      6    (at your option) any later version.
      7 
      8    This program is distributed in the hope that it will be useful,
      9    but WITHOUT ANY WARRANTY; without even the implied warranty of
     10    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     11    GNU General Public License for more details.
     12 
     13    You should have received a copy of the GNU General Public License
     14    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
     15 
     16 #ifndef DIAGNOSTICS_H
     17 #define DIAGNOSTICS_H
     18 
     19 /* If at all possible, fix the source rather than using these macros
     20    to silence warnings.  If you do use these macros be aware that
     21    you'll need to condition their use on particular compiler versions,
     22    which can be done for gcc using ansidecl.h's GCC_VERSION macro.
     23 
     24    gcc versions between 4.2 and 4.6 do not allow pragma control of
     25    diagnostics inside functions, giving a hard error if you try to use
     26    the finer control available with later versions.
     27    gcc prior to 4.2 warns about diagnostic push and pop.
     28 
     29    The other macros have restrictions too, for example gcc-5, gcc-6
     30    and gcc-7 warn that -Wstringop-truncation is unknown, unless you
     31    also add DIAGNOSTIC_IGNORE ("-Wpragma").  */
     32 
     33 #ifdef __GNUC__
     34 # define DIAGNOSTIC_PUSH _Pragma ("GCC diagnostic push")
     35 # define DIAGNOSTIC_POP _Pragma ("GCC diagnostic pop")
     36 
     37 /* Stringification.  */
     38 # define DIAGNOSTIC_STRINGIFY_1(x) #x
     39 # define DIAGNOSTIC_STRINGIFY(x) DIAGNOSTIC_STRINGIFY_1 (x)
     40 
     41 # define DIAGNOSTIC_IGNORE(option) \
     42   _Pragma (DIAGNOSTIC_STRINGIFY (GCC diagnostic ignored option))
     43 #else
     44 # define DIAGNOSTIC_PUSH
     45 # define DIAGNOSTIC_POP
     46 # define DIAGNOSTIC_IGNORE(option)
     47 #endif
     48 
     49 #if defined (__clang__) /* clang */
     50 
     51 # define DIAGNOSTIC_IGNORE_SELF_MOVE DIAGNOSTIC_IGNORE ("-Wself-move")
     52 # define DIAGNOSTIC_IGNORE_DEPRECATED_DECLARATIONS \
     53   DIAGNOSTIC_IGNORE ("-Wdeprecated-declarations")
     54 # define DIAGNOSTIC_IGNORE_DEPRECATED_REGISTER \
     55   DIAGNOSTIC_IGNORE ("-Wdeprecated-register")
     56 # if __has_warning ("-Wenum-compare-switch")
     57 #  define DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES \
     58    DIAGNOSTIC_IGNORE ("-Wenum-compare-switch")
     59 # endif
     60 
     61 # define DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL \
     62   DIAGNOSTIC_IGNORE ("-Wformat-nonliteral")
     63 
     64 #elif defined (__GNUC__) /* GCC */
     65 
     66 # define DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION \
     67   DIAGNOSTIC_IGNORE ("-Wstringop-truncation")
     68 
     69 # define DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL \
     70   DIAGNOSTIC_IGNORE ("-Wformat-nonliteral")
     71 
     72 #endif
     73 
     74 #ifndef DIAGNOSTIC_IGNORE_SELF_MOVE
     75 # define DIAGNOSTIC_IGNORE_SELF_MOVE
     76 #endif
     77 
     78 #ifndef DIAGNOSTIC_IGNORE_DEPRECATED_DECLARATIONS
     79 # define DIAGNOSTIC_IGNORE_DEPRECATED_DECLARATIONS
     80 #endif
     81 
     82 #ifndef DIAGNOSTIC_IGNORE_DEPRECATED_REGISTER
     83 # define DIAGNOSTIC_IGNORE_DEPRECATED_REGISTER
     84 #endif
     85 
     86 #ifndef DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
     87 # define DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
     88 #endif
     89 
     90 #ifndef DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION
     91 # define DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION
     92 #endif
     93 
     94 #ifndef DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL
     95 # define DIAGNOSTIC_IGNORE_FORMAT_NONLITERAL
     96 #endif
     97 
     98 #endif /* DIAGNOSTICS_H */
     99