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diagnostics.h revision 1.1 
      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_REGISTER \
     53   DIAGNOSTIC_IGNORE ("-Wdeprecated-register")
     54 # define DIAGNOSTIC_IGNORE_UNUSED_FUNCTION \
     55   DIAGNOSTIC_IGNORE ("-Wunused-function")
     56 # if __has_warning ("-Wenum-compare-switch")
     57 #  define DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES \
     58    DIAGNOSTIC_IGNORE ("-Wenum-compare-switch")
     59 # endif
     60 #elif defined (__GNUC__) /* GCC */
     61 
     62 # define DIAGNOSTIC_IGNORE_UNUSED_FUNCTION \
     63   DIAGNOSTIC_IGNORE ("-Wunused-function")
     64 
     65 # define DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION \
     66   DIAGNOSTIC_IGNORE ("-Wstringop-truncation")
     67 #endif
     68 
     69 #ifndef DIAGNOSTIC_IGNORE_SELF_MOVE
     70 # define DIAGNOSTIC_IGNORE_SELF_MOVE
     71 #endif
     72 
     73 #ifndef DIAGNOSTIC_IGNORE_DEPRECATED_REGISTER
     74 # define DIAGNOSTIC_IGNORE_DEPRECATED_REGISTER
     75 #endif
     76 
     77 #ifndef DIAGNOSTIC_IGNORE_UNUSED_FUNCTION
     78 # define DIAGNOSTIC_IGNORE_UNUSED_FUNCTION
     79 #endif
     80 
     81 #ifndef DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
     82 # define DIAGNOSTIC_IGNORE_SWITCH_DIFFERENT_ENUM_TYPES
     83 #endif
     84 
     85 #ifndef DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION
     86 # define DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION
     87 #endif
     88 
     89 #endif /* DIAGNOSTICS_H */
     90