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-4.2.1/gcc/Warning-Options.html
  10
  11 .include <bsd.compiler.mk>
  12
  13 # the default is gnu99 for now
  14 CSTD?=          gnu99
  15
  16 .if ${CSTD} == "k&r"
  17 CFLAGS+=        -traditional
  18 .elif ${CSTD} == "c89" || ${CSTD} == "c90"
  19 CFLAGS+=        -std=iso9899:1990
  20 .elif ${CSTD} == "c94" || ${CSTD} == "c95"
  21 CFLAGS+=        -std=iso9899:199409
  22 .elif ${CSTD} == "c99"
  23 CFLAGS+=        -std=iso9899:1999
  24 .else # CSTD
  25 CFLAGS+=        -std=${CSTD}
  26 .endif # CSTD
  27 .if !defined(NO_WARNS)
  28 # -pedantic is problematic because it also imposes namespace restrictions
  29 #CFLAGS+=       -pedantic
  30 .if defined(WARNS)
  31 .if ${WARNS} >= 1
  32 CWARNFLAGS+=    -Wsystem-headers
  33 .if !defined(NO_WERROR) && (${COMPILER_TYPE} != "clang" \
  34     || !defined(NO_WERROR.clang))
  35 CWARNFLAGS+=    -Werror
  36 .endif # !NO_WERROR && (!CLANG || !NO_WERROR.clang)
  37 .endif # WARNS >= 1
  38 .if ${WARNS} >= 2
  39 CWARNFLAGS+=    -Wall -Wno-format-y2k
  40 .endif # WARNS >= 2
  41 .if ${WARNS} >= 3
  42 CWARNFLAGS+=    -W -Wno-unused-parameter -Wstrict-prototypes\
  43                 -Wmissing-prototypes -Wpointer-arith
  44 .endif # WARNS >= 3
  45 .if ${WARNS} >= 4
  46 CWARNFLAGS+=    -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\
  47                 -Wunused-parameter
  48 .if !defined(NO_WCAST_ALIGN) && (${COMPILER_TYPE} != "clang" \
  49     || !defined(NO_WCAST_ALIGN.clang))
  50 CWARNFLAGS+=    -Wcast-align
  51 .endif # !NO_WCAST_ALIGN && (!CLANG || !NO_WCAST_ALIGN.clang)
  52 .endif # WARNS >= 4
  53 # BDECFLAGS
  54 .if ${WARNS} >= 6
  55 CWARNFLAGS+=    -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\
  56                 -Wold-style-definition
  57 .if ${COMPILER_TYPE} == "clang" && !defined(EARLY_BUILD) && \
  58     !defined(NO_WMISSING_VARIABLE_DECLARATIONS)
  59 CWARNFLAGS+=    -Wmissing-variable-declarations
  60 .endif
  61 .endif # WARNS >= 6
  62 .if ${WARNS} >= 2 && ${WARNS} <= 4
  63 # XXX Delete -Wuninitialized by default for now -- the compiler doesn't
  64 # XXX always get it right.
  65 CWARNFLAGS+=    -Wno-uninitialized
  66 .endif # WARNS >=2 && WARNS <= 4
  67 CWARNFLAGS+=    -Wno-pointer-sign
  68 # Clang has more warnings enabled by default, and when using -Wall, so if WARNS
  69 # is set to low values, these have to be disabled explicitly.
  70 .if ${COMPILER_TYPE} == "clang" && !defined(EARLY_BUILD)
  71 .if ${WARNS} <= 6
  72 CWARNFLAGS+=    -Wno-empty-body -Wno-string-plus-int
  73 .if ${COMPILER_VERSION} > 30300
  74 CWARNFLAGS+=    -Wno-unused-const-variable
  75 .endif
  76 .endif # WARNS <= 6
  77 .if ${WARNS} <= 3
  78 CWARNFLAGS+=    -Wno-tautological-compare -Wno-unused-value\
  79                 -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion
  80 .endif # WARNS <= 3
  81 .if ${WARNS} <= 2
  82 CWARNFLAGS+=    -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
  83 .endif # WARNS <= 2
  84 .if ${WARNS} <= 1
  85 CWARNFLAGS+=    -Wno-parentheses
  86 .endif # WARNS <= 1
  87 .if defined(NO_WARRAY_BOUNDS)
  88 CWARNFLAGS+=    -Wno-array-bounds
  89 .endif # NO_WARRAY_BOUNDS
  90 .endif # CLANG
  91 .endif # WARNS
  92
  93 .if defined(FORMAT_AUDIT)
  94 WFORMAT=        1
  95 .endif # FORMAT_AUDIT
  96 .if defined(WFORMAT)
  97 .if ${WFORMAT} > 0
  98 #CWARNFLAGS+=   -Wformat-nonliteral -Wformat-security -Wno-format-extra-args
  99 CWARNFLAGS+=    -Wformat=2 -Wno-format-extra-args
 100 .if ${COMPILER_TYPE} == "clang" && !defined(EARLY_BUILD)
 101 .if ${WARNS} <= 3
 102 CWARNFLAGS+=    -Wno-format-nonliteral
 103 .endif # WARNS <= 3
 104 .endif # CLANG
 105 .if !defined(NO_WERROR) && (${COMPILER_TYPE} != "clang" \
 106     || !defined(NO_WERROR.clang))
 107 CWARNFLAGS+=    -Werror
 108 .endif # !NO_WERROR && (!CLANG || !NO_WERROR.clang)
 109 .endif # WFORMAT > 0
 110 .endif # WFORMAT
 111 .if defined(NO_WFORMAT) || (${COMPILER_TYPE} == "clang" && defined(NO_WFORMAT.clang))
 112 CWARNFLAGS+=    -Wno-format
 113 .endif # NO_WFORMAT || (CLANG && NO_WFORMAT.clang)
 114 .endif # !NO_WARNS
 115
 116 .if defined(IGNORE_PRAGMA)
 117 CWARNFLAGS+=    -Wno-unknown-pragmas
 118 .endif # IGNORE_PRAGMA
 119
 120 .if !defined(EARLY_BUILD)
 121 .if ${COMPILER_TYPE} == "clang"
 122 CLANG_NO_IAS=    -no-integrated-as
 123 CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
 124                  -mllvm -enable-load-pre=false -mllvm -simplifycfg-dup-ret
 125 CFLAGS+=         -Qunused-arguments
 126 .if ${MACHINE_CPUARCH} == "sparc64"
 127 # Don't emit .cfi directives, since we must use GNU as on sparc64, for now.
 128 CFLAGS+=         -fno-dwarf2-cfi-asm
 129 .endif # SPARC64
 130 # The libc++ headers use c++11 extensions.  These are normally silenced because
 131 # they are treated as system headers, but we explicitly disable that warning
 132 # suppression when building the base system to catch bugs in our headers.
 133 # Eventually we'll want to start building the base system C++ code as C++11,
 134 # but not yet.
 135 CXXFLAGS+=       -Wno-c++11-extensions
 136 CFLAGS+=         ${CFLAGS.clang}
 137 CXXFLAGS+=       ${CXXFLAGS.clang}
 138 .else # !CLANG
 139 GCC_MS_EXTENSIONS= -fms-extensions
 140 CFLAGS+=         ${CFLAGS.gcc}
 141 CXXFLAGS+=       ${CXXFLAGS.gcc}
 142 .endif # CLANG
 143 .endif # !EARLY_BUILD
 144
 145 .if ${MK_SSP} != "no" && ${MACHINE_CPUARCH} != "ia64" && \
 146     ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
 147 # Don't use -Wstack-protector as it breaks world with -Werror.
 148 SSP_CFLAGS?=    -fstack-protector
 149 CFLAGS+=        ${SSP_CFLAGS}
 150 .endif # SSP && !IA64 && !ARM && !MIPS
 151
 152 # Allow user-specified additional warning flags
 153 CFLAGS+=        ${CWARNFLAGS}
 154
 155
 156 # Tell bmake not to mistake standard targets for things to be searched for
 157 # or expect to ever be up-to-date.
 158 PHONY_NOTMAIN = afterdepend afterinstall all beforedepend beforeinstall \
 159                 beforelinking build build-tools buildfiles buildincludes \
 160                 checkdpadd clean cleandepend cleandir cleanobj configure \
 161                 depend dependall distclean distribute exe extract \
 162                 html includes install installfiles installincludes lint \
 163                 obj objlink objs objwarn realall realdepend \
 164                 realinstall regress subdir-all subdir-depend subdir-install \
 165                 tags whereobj
 166
 167 .if defined(PORTNAME)
 168 PHONY_NOTMAIN+= fetch patch
 169 .endif
 170
 171 .PHONY: ${PHONY_NOTMAIN}
 172 .NOTMAIN: ${PHONY_NOTMAIN}