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1 # - Check if the C compiler supports a set of warning flags.
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2 # CFUNGE_CHECK_WARNING_FLAGS()
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3 #
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4 # Will use add_definitions() to add the flags if they are supported.
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5 #
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6
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7 # cfunge - A standard-conforming Befunge93/98/109 interpreter in C.
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8 # Copyright (C) 2008 Arvid Norlander <anmaster AT tele2 DOT se>
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9 #
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10 # This program is free software: you can redistribute it and/or modify
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11 # it under the terms of the GNU General Public License as published by
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12 # the Free Software Foundation, either version 3 of the License, or
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13 # (at the proxy's option) any later version. Arvid Norlander is a
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14 # proxy who can decide which future versions of the GNU General Public
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15 # License can be used.
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16 #
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17 # This program is distributed in the hope that it will be useful,
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18 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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19 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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20 # GNU General Public License for more details.
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21 #
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22 # You should have received a copy of the GNU General Public License
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23 # along with this program. If not, see <http://www.gnu.org/licenses/>.
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24
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25 include(CfungeCheckCflag)
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26
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27 macro(CFUNGE_CHECK_WARNING_FLAGS)
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28 if (CMAKE_COMPILER_IS_GNUCC)
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29 # Not all GCC versions support all of these flags.
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30 CFUNGE_CHECK_CFLAG(Wall -Wall)
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31 CFUNGE_CHECK_CFLAG(Wextra -Wextra)
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32 CFUNGE_CHECK_CFLAG(pedantic -pedantic)
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33
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34 CFUNGE_CHECK_CFLAG(Wwrite-strings -Wwrite-strings)
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35
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36 CFUNGE_CHECK_CFLAG(Wcast-align -Wcast-align)
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37 CFUNGE_CHECK_CFLAG(Wcast-qual -Wcast-qual)
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38 CFUNGE_CHECK_CFLAG(Wbad-function-cast -Wbad-function-cast)
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39
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40 CFUNGE_CHECK_CFLAG(Wstrict-prototypes -Wstrict-prototypes)
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41 CFUNGE_CHECK_CFLAG(Wmissing-prototypes -Wmissing-prototypes)
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42 CFUNGE_CHECK_CFLAG(Wmissing-declarations -Wmissing-declarations)
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43 CFUNGE_CHECK_CFLAG(Wold-style-definition -Wold-style-definition)
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44
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45 CFUNGE_CHECK_CFLAG(Wredundant-decls -Wredundant-decls)
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46 CFUNGE_CHECK_CFLAG(Wnested-externs -Wnested-externs)
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47 CFUNGE_CHECK_CFLAG(Wdeclaration-after-statement -Wdeclaration-after-statement)
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48
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49 CFUNGE_CHECK_CFLAG(Wshadow -Wshadow)
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50 CFUNGE_CHECK_CFLAG(Wundef -Wundef)
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51 CFUNGE_CHECK_CFLAG(Wpacked -Wpacked)
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52 CFUNGE_CHECK_CFLAG(Wfloat-equal -Wfloat-equal)
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53
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54 CFUNGE_CHECK_CFLAG(Wstrict-aliasing_2 -Wstrict-aliasing=2)
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55 #CFUNGE_CHECK_CFLAG(Wstrict-overflow_5 -Wstrict-overflow=5)
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56 CFUNGE_CHECK_CFLAG(Wformat_2 -Wformat=2)
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57
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58 CFUNGE_CHECK_CFLAG(Wmissing-noreturn -Wmissing-noreturn)
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59 CFUNGE_CHECK_CFLAG(Wmissing-format-attribute -Wmissing-format-attribute)
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60
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61 CFUNGE_CHECK_CFLAG(Winit-self -Winit-self)
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62 # GCC 4.1(?) or later
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63 CFUNGE_CHECK_CFLAG(Wunsafe-loop-optimizations -Wunsafe-loop-optimizations)
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64 CFUNGE_CHECK_CFLAG(Wmissing-include-dirs -Wmissing-include-dirs)
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65
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66 CFUNGE_CHECK_CFLAG(Wunused-parameter -Wunused-parameter)
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67 # These are part of -Wall in GCC 4.3, but not in some older versions.
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68 CFUNGE_CHECK_CFLAG(Wunused-function -Wunused-function)
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69 CFUNGE_CHECK_CFLAG(Wunused-label -Wunused-label)
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70 CFUNGE_CHECK_CFLAG(Wunused-value -Wunused-value)
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71 CFUNGE_CHECK_CFLAG(Wunused-variable -Wunused-variable)
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72 CFUNGE_CHECK_CFLAG(Wimplicit -Wimplicit)
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73 CFUNGE_CHECK_CFLAG(Wparentheses -Wparentheses)
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74 # Part of -pedantic in 4.3
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75 CFUNGE_CHECK_CFLAG(Wpointer-arith -Wpointer-arith)
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76
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77 # Maintainer flags. Gives lots of false positives.
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78 # add_definitions(-Wunreachable-code -fno-inline
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79 # -fno-inline-functions-called-once -fno-inline-functions
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80 # -fkeep-inline-functions -Wno-inline)
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81 # Even more false positives
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82 #add_definitions(-Wunreachable-code)
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83 # Only with this meaning in GCC 4.3 (and false positives):
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84 # -Wconversion
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85 endif (CMAKE_COMPILER_IS_GNUCC)
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86 endmacro(CFUNGE_CHECK_WARNING_FLAGS)
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