include/diagnostics.h

   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 */