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 MK_WARNS=no.
   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 # -pedantic is problematic because it also imposes namespace restrictions
  28 #CFLAGS+=       -pedantic
  29 .if defined(WARNS)
  30 .if ${WARNS} >= 1
  31 CWARNFLAGS+=    -Wsystem-headers
  32 .if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
  33 CWARNFLAGS+=    -Werror
  34 .endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
  35 .endif # WARNS >= 1
  36 .if ${WARNS} >= 2
  37 CWARNFLAGS+=    -Wall -Wno-format-y2k
  38 .endif # WARNS >= 2
  39 .if ${WARNS} >= 3
  40 CWARNFLAGS+=    -W -Wno-unused-parameter -Wstrict-prototypes\
  41                 -Wmissing-prototypes -Wpointer-arith
  42 .endif # WARNS >= 3
  43 .if ${WARNS} >= 4
  44 CWARNFLAGS+=    -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\
  45                 -Wunused-parameter
  46 .if !defined(NO_WCAST_ALIGN) && !defined(NO_WCAST_ALIGN.${COMPILER_TYPE})
  47 CWARNFLAGS+=    -Wcast-align
  48 .endif # !NO_WCAST_ALIGN !NO_WCAST_ALIGN.${COMPILER_TYPE}
  49 .endif # WARNS >= 4
  50 # BDECFLAGS
  51 .if ${WARNS} >= 6
  52 CWARNFLAGS+=    -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\
  53                 -Wold-style-definition
  54 .if !defined(NO_WMISSING_VARIABLE_DECLARATIONS)
  55 CWARNFLAGS.clang+=      -Wmissing-variable-declarations
  56 .endif
  57 .if !defined(NO_WTHREAD_SAFETY)
  58 CWARNFLAGS.clang+=      -Wthread-safety
  59 .endif
  60 .endif # WARNS >= 6
  61 .if ${WARNS} >= 2 && ${WARNS} <= 4
  62 # XXX Delete -Wuninitialized by default for now -- the compiler doesn't
  63 # XXX always get it right.
  64 CWARNFLAGS+=    -Wno-uninitialized
  65 .endif # WARNS >=2 && WARNS <= 4
  66 CWARNFLAGS+=    -Wno-pointer-sign
  67 # Clang has more warnings enabled by default, and when using -Wall, so if WARNS
  68 # is set to low values, these have to be disabled explicitly.
  69 .if ${WARNS} <= 6
  70 CWARNFLAGS.clang+=      -Wno-empty-body -Wno-string-plus-int
  71 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30400
  72 CWARNFLAGS.clang+= -Wno-unused-const-variable
  73 .endif
  74 .endif # WARNS <= 6
  75 .if ${WARNS} <= 3
  76 CWARNFLAGS.clang+=      -Wno-tautological-compare -Wno-unused-value\
  77                 -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion
  78 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
  79 CWARNFLAGS.clang+=      -Wno-unused-local-typedef
  80 .endif
  81 .endif # WARNS <= 3
  82 .if ${WARNS} <= 2
  83 CWARNFLAGS.clang+=      -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
  84 .endif # WARNS <= 2
  85 .if ${WARNS} <= 1
  86 CWARNFLAGS.clang+=      -Wno-parentheses
  87 .endif # WARNS <= 1
  88 .if defined(NO_WARRAY_BOUNDS)
  89 CWARNFLAGS.clang+=      -Wno-array-bounds
  90 .endif # NO_WARRAY_BOUNDS
  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 ${WARNS} <= 3
 101 CWARNFLAGS.clang+=      -Wno-format-nonliteral
 102 .endif # WARNS <= 3
 103 .if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
 104 CWARNFLAGS+=    -Werror
 105 .endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
 106 .endif # WFORMAT > 0
 107 .endif # WFORMAT
 108 .if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE})
 109 CWARNFLAGS+=    -Wno-format
 110 .endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE}
 111
 112 # How to handle FreeBSD custom printf format specifiers.
 113 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
 114 FORMAT_EXTENSIONS=      -D__printf__=__freebsd_kprintf__
 115 .else
 116 FORMAT_EXTENSIONS=      -fformat-extensions
 117 .endif
 118
 119 .if defined(IGNORE_PRAGMA)
 120 CWARNFLAGS+=    -Wno-unknown-pragmas
 121 .endif # IGNORE_PRAGMA
 122
 123 # We need this conditional because many places that use it
 124 # only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}.
 125 # unconditionally, and can't easily use the CFLAGS.clang=
 126 # mechanism.
 127 .if ${COMPILER_TYPE} == "clang"
 128 CLANG_NO_IAS=    -no-integrated-as
 129 .endif
 130 CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
 131                  -mllvm -simplifycfg-dup-ret
 132 .if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700
 133 CLANG_OPT_SMALL+= -mllvm -enable-gvn=false
 134 .else
 135 CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
 136 .endif
 137 CFLAGS.clang+=   -Qunused-arguments
 138 .if ${MACHINE_CPUARCH} == "sparc64"
 139 # Don't emit .cfi directives, since we must use GNU as on sparc64, for now.
 140 CFLAGS.clang+=   -fno-dwarf2-cfi-asm
 141 .endif # SPARC64
 142 # The libc++ headers use c++11 extensions.  These are normally silenced because
 143 # they are treated as system headers, but we explicitly disable that warning
 144 # suppression when building the base system to catch bugs in our headers.
 145 # Eventually we'll want to start building the base system C++ code as C++11,
 146 # but not yet.
 147 CXXFLAGS.clang+=         -Wno-c++11-extensions
 148
 149 .if ${MK_SSP} != "no" && \
 150     ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
 151 .if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \
 152     (${COMPILER_TYPE} == "gcc" && \
 153      (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900))
 154 # Don't use -Wstack-protector as it breaks world with -Werror.
 155 SSP_CFLAGS?=    -fstack-protector-strong
 156 .else
 157 SSP_CFLAGS?=    -fstack-protector
 158 .endif
 159 CFLAGS+=        ${SSP_CFLAGS}
 160 .endif # SSP && !ARM && !MIPS
 161
 162 # Allow user-specified additional warning flags, plus compiler specific flag overrides.
 163 # Unless we've overriden this...
 164 .if ${MK_WARNS} != "no"
 165 CFLAGS+=        ${CWARNFLAGS} ${CWARNFLAGS.${COMPILER_TYPE}}
 166 .endif
 167
 168 CFLAGS+=         ${CFLAGS.${COMPILER_TYPE}}
 169 CXXFLAGS+=       ${CXXFLAGS.${COMPILER_TYPE}}
 170
 171 # Tell bmake not to mistake standard targets for things to be searched for
 172 # or expect to ever be up-to-date.
 173 PHONY_NOTMAIN = afterdepend afterinstall all beforedepend beforeinstall \
 174                 beforelinking build build-tools buildconfig buildfiles \
 175                 buildincludes checkdpadd clean cleandepend cleandir cleanobj \
 176                 configure depend dependall distclean distribute exe \
 177                 files html includes install installconfig installfiles \
 178                 installincludes lint obj objlink objs objwarn realall \
 179                 realdepend realinstall regress subdir-all subdir-depend \
 180                 subdir-install tags whereobj
 181
 182 # we don't want ${PROG} to be PHONY
 183 .PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
 184 .NOTMAIN: ${PHONY_NOTMAIN:Nall}
 185
 186 .if ${MK_STAGING} != "no"
 187 .if defined(_SKIP_BUILD) || (!make(all) && !make(clean*))
 188 _SKIP_STAGING?= yes
 189 .endif
 190 .if ${_SKIP_STAGING:Uno} == "yes"
 191 staging stage_libs stage_files stage_as stage_links stage_symlinks:
 192 .else
 193 # allow targets like beforeinstall to be leveraged
 194 DESTDIR= ${STAGE_OBJTOP}
 195
 196 .if commands(beforeinstall)
 197 .if !empty(_LIBS) || ${MK_STAGING_PROG} != "no"
 198 staging: beforeinstall
 199 .endif
 200 .endif
 201
 202 # normally only libs and includes are staged
 203 .if ${MK_STAGING_PROG} != "no"
 204 STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
 205
 206 .if !empty(PROG) || !empty(PROGS)
 207 .if defined(PROGNAME)
 208 STAGE_AS_SETS+= prog
 209 STAGE_AS_${PROG}= ${PROGNAME}
 210 stage_as.prog: ${PROG}
 211 .else
 212 STAGE_SETS+= prog
 213 stage_files.prog: ${PROG}
 214 STAGE_TARGETS+= stage_files
 215 .endif
 216 .endif
 217 .endif
 218
 219 .if !empty(_LIBS) && !defined(INTERNALLIB)
 220 .if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
 221 STAGE_SETS+= shlib
 222 STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
 223 STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
 224 stage_files.shlib: ${_LIBS:M*.so.*}
 225 .endif
 226
 227 .if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
 228 _LDSCRIPTROOT?= ${STAGE_OBJTOP}
 229 STAGE_AS_SETS+= ldscript
 230 STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
 231 stage_as.ldscript: ${SHLIB_LINK:R}.ld
 232 STAGE_DIR.ldscript = ${STAGE_LIBDIR}
 233 STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
 234 NO_SHLIB_LINKS=
 235 .endif
 236
 237 .if target(stage_files.shlib)
 238 stage_libs: ${_LIBS}
 239 .if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
 240 stage_files.shlib: ${SHLIB_NAME}.symbols
 241 .endif
 242 .else
 243 stage_libs: ${_LIBS}
 244 .endif
 245 .if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
 246 stage_libs: ${SHLIB_NAME}.symbols
 247 .endif
 248
 249 .endif
 250
 251 .if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
 252 .if !defined(NO_BEFOREBUILD_INCLUDES)
 253 stage_includes: buildincludes
 254 beforebuild: stage_includes
 255 .endif
 256 .endif
 257
 258 .for t in stage_libs stage_files stage_as
 259 .if target($t)
 260 STAGE_TARGETS+= $t
 261 .endif
 262 .endfor
 263
 264 .if !empty(STAGE_AS_SETS)
 265 STAGE_TARGETS+= stage_as
 266 .endif
 267
 268 .if !empty(_LIBS) || ${MK_STAGING_PROG} != "no"
 269
 270 .if !empty(LINKS)
 271 STAGE_TARGETS+= stage_links
 272 .if ${MAKE_VERSION} < 20131001
 273 stage_links.links: ${_LIBS} ${PROG}
 274 .endif
 275 STAGE_SETS+= links
 276 STAGE_LINKS.links= ${LINKS}
 277 .endif
 278
 279 .if !empty(SYMLINKS)
 280 STAGE_TARGETS+= stage_symlinks
 281 STAGE_SETS+= links
 282 STAGE_SYMLINKS.links= ${SYMLINKS}
 283 .endif
 284
 285 .endif
 286
 287 .include <meta.stage.mk>
 288 .endif
 289 .endif
 290