include/diagnostics.h

   1 /* Copyright (C) 2017-2018 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 # define DIAGNOSTIC_IGNORE_UNUSED_FUNCTION \
  57   DIAGNOSTIC_IGNORE ("-Wunused-function")
  58 # if __has_warning ("-Wenum-compare-switch")
  59 #  define DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES \
  60    DIAGNOSTIC_IGNORE ("-Wenum-compare-switch")
  61 # endif
  62 #elif defined (__GNUC__) /* GCC */
  63
  64 # define DIAGNOSTIC_IGNORE_UNUSED_FUNCTION \
  65   DIAGNOSTIC_IGNORE ("-Wunused-function")
  66
  67 # define DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION \
  68   DIAGNOSTIC_IGNORE ("-Wstringop-truncation")
  69 #endif
  70
  71 #ifndef DIAGNOSTIC_IGNORE_SELF_MOVE
  72 # define DIAGNOSTIC_IGNORE_SELF_MOVE
  73 #endif
  74
  75 #ifndef DIAGNOSTIC_IGNORE_DEPRECATED_DECLARATIONS
  76 # define DIAGNOSTIC_IGNORE_DEPRECATED_DECLARATIONS
  77 #endif
  78
  79 #ifndef DIAGNOSTIC_IGNORE_DEPRECATED_REGISTER
  80 # define DIAGNOSTIC_IGNORE_DEPRECATED_REGISTER
  81 #endif
  82
  83 #ifndef DIAGNOSTIC_IGNORE_UNUSED_FUNCTION
  84 # define DIAGNOSTIC_IGNORE_UNUSED_FUNCTION
  85 #endif
  86
  87 #ifndef DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
  88 # define DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
  89 #endif
  90
  91 #ifndef DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION
  92 # define DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION
  93 #endif
  94
  95 #endif /* DIAGNOSTICS_H */