share/mk/bsd.sys.mk

   1 # $FreeBSD$
   2 #
   3 # This file contains common settings used for building FreeBSD
   4 # sources.
   5
   6 # Enable various levels of compiler warning checks.  These may be
   7 # overridden (e.g. if using a non-gcc compiler) by defining NO_WARNS.
   8
   9 # for GCC:  http://gcc.gnu.org/onlinedocs/gcc-3.0.4/gcc_3.html#IDX143
  10
  11 .if !defined(NO_WARNS) && ${CC} != "icc"
  12 . if defined(CSTD)
  13 .  if ${CSTD} == "k&r"
  14 CFLAGS          += -traditional
  15 .  elif ${CSTD} == "c89" || ${CSTD} == "c90"
  16 CFLAGS          += -std=iso9899:1990
  17 .  elif ${CSTD} == "c94" || ${CSTD} == "c95"
  18 CFLAGS          += -std=iso9899:199409
  19 .  elif ${CSTD} == "c99"
  20 CFLAGS          += -std=iso9899:1999
  21 .  else
  22 CFLAGS          += -std=${CSTD}
  23 .  endif
  24 # -pedantic is problematic because it also imposes namespace restrictions
  25 #CFLAGS         += -pedantic
  26 . endif
  27 . if defined(WARNS)
  28 .  if ${WARNS} >= 1
  29 CWARNFLAGS      +=      -Wsystem-headers
  30 .   if !defined(NO_WERROR)
  31 CWARNFLAGS      +=      -Werror
  32 .   endif
  33 .  endif
  34 .  if ${WARNS} >= 2
  35 CWARNFLAGS      +=      -Wall -Wno-format-y2k
  36 .  endif
  37 .  if ${WARNS} >= 3
  38 CWARNFLAGS      +=      -W -Wno-unused-parameter -Wstrict-prototypes\
  39                         -Wmissing-prototypes -Wpointer-arith
  40 .  endif
  41 .  if ${WARNS} >= 4
  42 CWARNFLAGS      +=      -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch\
  43                         -Wshadow -Wcast-align -Wunused-parameter
  44 .  endif
  45 # BDECFLAGS
  46 .  if ${WARNS} >= 6
  47 CWARNFLAGS      +=      -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls
  48 .  endif
  49 .  if ${WARNS} >= 2 && ${WARNS} <= 4
  50 # XXX Delete -Wuninitialized by default for now -- the compiler doesn't
  51 # XXX always get it right.
  52 CWARNFLAGS      +=      -Wno-uninitialized
  53 .  endif
  54 .  if !defined(WITH_GCC3)
  55 CWARNFLAGS      +=      -Wno-pointer-sign
  56 .  endif
  57 . endif
  58
  59 . if defined(FORMAT_AUDIT)
  60 WFORMAT         =       1
  61 . endif
  62 . if defined(WFORMAT)
  63 .  if ${WFORMAT} > 0
  64 #CWARNFLAGS     +=      -Wformat-nonliteral -Wformat-security -Wno-format-extra-args
  65 CWARNFLAGS      +=      -Wformat=2 -Wno-format-extra-args
  66 .   if !defined(NO_WERROR)
  67 CWARNFLAGS      +=      -Werror
  68 .   endif
  69 .  endif
  70 . endif
  71 .endif
  72
  73 .if defined(IGNORE_PRAGMA)
  74 CWARNFLAGS      +=      -Wno-unknown-pragmas
  75 .endif
  76
  77 .if ${MK_SSP} != "no" && ${CC} != "icc" && ${MACHINE_ARCH} != "ia64" && \
  78         ${MACHINE_ARCH} != "arm" && ${MACHINE_ARCH} != "mips"
  79 # Don't use -Wstack-protector as it breaks world with -Werror.
  80 SSP_CFLAGS      ?=      -fstack-protector
  81 CFLAGS          +=      ${SSP_CFLAGS}
  82 .endif
  83
  84 # Allow user-specified additional warning flags
  85 CFLAGS          +=      ${CWARNFLAGS}