share/mk/bsd.sys.mk

   1 # $FreeBSD: src/share/mk/bsd.sys.mk,v 1.3.2.5 2002/07/03 16:59:14 des Exp $
   2 #
   3 # This file contains common settings used for building DragonFly
   4 # sources.
   5
   6 # Support handling -W flags for both host cc and target cc.
   7 .if defined(__USE_HOST_CCVER)
   8 _WCCVER=        ${HOST_CCVER}
   9 .else
  10 _WCCVER=        ${CCVER}
  11 .endif
  12
  13 CSTD?=  gnu99
  14
  15 .if ${CSTD} == "k&r"
  16 CFLAGS          += -traditional
  17 .elif ${CSTD} == "c89" || ${CSTD} == "c90"
  18 CFLAGS          += -std=iso9899:1990
  19 .elif ${CSTD} == "c94" || ${CSTD} == "c95"
  20 CFLAGS          += -std=iso9899:199409
  21 .elif ${CSTD} == "c99"
  22 CFLAGS          += -std=iso9899:1999
  23 .else
  24 CFLAGS          += -std=${CSTD}
  25 .endif
  26
  27 # Explicitly clear _cnowarnflags (should not be used in Makefiles).
  28 _cnowarnflags=
  29
  30 # Enable various levels of compiler warning checks.  These may be
  31 # overridden (e.g. if using a non-gcc compiler) by defining NO_WARNS.
  32
  33 .if !defined(NO_WARNS)
  34 . if defined(WARNS)
  35 .  if ${WARNS} >= 1
  36 CWARNFLAGS      +=      -Wmissing-include-dirs -Wsystem-headers
  37 .   if !defined(NO_WERROR) && (${_WCCVER} == "gcc47" || ${_WCCVER} == "gcc50")
  38 CWARNFLAGS      +=      -Werror
  39 .   endif
  40 .  endif
  41 .  if ${WARNS} >= 2
  42 CWARNFLAGS      +=      -Wall -Wformat-security -Winit-self
  43 _cnowarnflags   +=      -Wno-pointer-sign
  44 .  endif
  45 .  if ${WARNS} >= 3
  46 CWARNFLAGS      +=      -Wextra -Wstrict-prototypes\
  47                         -Wmissing-prototypes -Wpointer-arith\
  48                         -Wold-style-definition
  49 _cnowarnflags   +=      -Wno-unused-parameter
  50 .  endif
  51 .  if ${WARNS} >= 4
  52 CWARNFLAGS      +=      -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch\
  53                         -Wshadow -Wcast-align -Wunused-parameter
  54 .  endif
  55 .  if ${WARNS} >= 6
  56 CWARNFLAGS      +=      -Wchar-subscripts -Winline -Wnested-externs\
  57                         -Wredundant-decls
  58 .  endif
  59 .  if ${WARNS} >= 2 && ${WARNS} <= 4
  60 # XXX Delete -Wmaybe-uninitialized by default for now -- the compiler doesn't
  61 # XXX always get it right.
  62 .   if ${_WCCVER:Mgcc*}
  63 _cnowarnflags   +=      -Wno-maybe-uninitialized
  64 .   else
  65 _cnowarnflags   +=      -Wno-uninitialized
  66 .   endif
  67 .  endif
  68 # Delete -Wformat-* family that give little benefits, same for stringop.
  69 .  if ${WARNS} >= 2 && ${WARNS} <= 6 && ${_WCCVER:Mgcc8*}
  70 _cnowarnflags   +=      -Wno-format-overflow -Wno-format-truncation
  71 _cnowarnflags   +=      -Wno-stringop-truncation
  72 .  endif
  73 .  if ${WARNS} >= 1 && ${WARNS} <= 6 && ${_WCCVER:Mgcc8*}
  74 _cnowarnflags   +=      -Wno-stringop-overflow
  75 .  endif
  76 # Activate gcc47's -Wunused-but-set-variable (which is in -Wall) and
  77 # -Wunused-but-set-parameter (which is in -Wextra) only at WARNS >= 4
  78 # (which is the level when also -Wunused-parameter comes into play).
  79 .  if ${WARNS} >= 2 && ${WARNS} <= 3 && ${_WCCVER:Mgcc*}
  80 _cnowarnflags   +=      -Wno-unused-but-set-variable
  81 .  endif
  82 .  if ${WARNS} == 3 && ${_WCCVER:Mgcc*}
  83 _cnowarnflags   +=      -Wno-unused-but-set-parameter
  84 .  endif
  85 .  if ${WARNS} == 3 && (${_WCCVER:Mgcc49} || ${_WCCVER:Mgcc[5-]*})
  86 _cnowarnflags   +=      -Wno-unused-value
  87 .  endif
  88 .  if ${WARNS} == 3 && ${_WCCVER:Mgcc8*}
  89 _cnowarnflags   +=      -Wno-implicit-fallthrough
  90 .  endif
  91 .  if ${WARNS} >= 2 && ${_WCCVER:Mgcc4[789]}
  92 _cnowarnflags   +=      -Wno-error=maybe-uninitialized\
  93                         -Wno-error=uninitialized\
  94                         -Wno-error=shadow
  95 .  endif
  96 # Disable -Werror selectively for -Os and -Og compilations.  Both -Winline and
  97 # -Wmaybe-uninitialized are noisy and should be caught by standard -O and -O2.
  98 # These are still useful diagnostics while investigating compilation issues.
  99 .  if defined(WORLD_CCOPTLEVEL) && (${WORLD_CCOPTLEVEL:Mg} || ${WORLD_CCOPTLEVEL:Ms})
 100 .   if ${WARNS} >= 6
 101 CWARNFLAGS      +=      -Wno-error=inline
 102 .   endif
 103 .   if ${WARNS} >= 5 && ${_WCCVER:Mgcc*}
 104 CWARNFLAGS      +=      -Wno-error=maybe-uninitialized
 105 .   endif
 106 .  endif
 107 . endif
 108
 109 . if defined(FORMAT_AUDIT)
 110 WFORMAT         =       1
 111 . endif
 112 . if defined(WFORMAT)
 113 .  if ${WFORMAT} > 0
 114 CWARNFLAGS      +=      -Wformat=2
 115 .   if !defined(NO_WERROR) && (${_WCCVER} == "gcc47" || ${_WCCVER} == "gcc50")
 116 CWARNFLAGS      +=      -Werror
 117 .   endif
 118 .  endif
 119 . endif
 120 .endif
 121
 122 .if defined(NO_WCAST_FUNCTION_TYPE) && ${WARNS} >= 3 && ${_WCCVER:Mgcc8*}
 123 _cnowarnflags   +=      -Wno-cast-function-type
 124 .endif
 125 .if defined(NO_WARRAY_BOUNDS)
 126 _cnowarnflags   +=      -Wno-array-bounds
 127 .endif
 128 .if defined(NO_STRICT_OVERFLOW)
 129 CFLAGS          +=      -fno-strict-overflow
 130 .endif
 131 .if defined(NO_STRICT_ALIASING)
 132 CFLAGS          +=      -fno-strict-aliasing
 133 .endif
 134
 135
 136 # Add -Wno-foo flags last
 137 .if !defined(WARNS_AUDIT)
 138 CWARNFLAGS      +=      ${_cnowarnflags}
 139 .endif
 140
 141 # Allow user-specified additional warning flags
 142 CFLAGS          +=      ${CWARNFLAGS}
 143
 144 # Tell bmake not to mistake standard targets for things to be searched for
 145 # or expect to ever be up-to-date
 146 PHONY_NOTMAIN = afterdepend afterinstall all beforedepend beforeinstall \
 147         beforelinking build build-tools buildfiles buildincludes \
 148         checkdpadd clean cleandepend cleandir cleanobj configure \
 149         depend dependall distclean distribute exe extract fetch \
 150         html includes install installfiles installincludes lint \
 151         obj objlink objs objwarn patch realall realdepend \
 152         realinstall regress subdir-all subdir-depend subdir-install \
 153         tags whereobj
 154
 155 # if given PROG matches anything in the PHONY list, exclude it.
 156 .PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
 157 .NOTMAIN: ${PHONY_NOTMAIN}