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 4.2.1 GCC:   http://gcc.gnu.org/onlinedocs/gcc-4.2.1/gcc/Warning-Options.html
  10 # for current GCC: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
  11 # for clang: https://clang.llvm.org/docs/DiagnosticsReference.html
  12
  13 .include <bsd.compiler.mk>
  14
  15 # the default is gnu99 for now
  16 CSTD?=          gnu99
  17
  18 .if ${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
  28 .if !empty(CXXSTD)
  29 CXXFLAGS+=      -std=${CXXSTD}
  30 .endif
  31
  32 #
  33 # Turn off -Werror for gcc 4.2.1. The compiler is on the glide path out of the
  34 # system, and any warnings specific to it are no longer relevant as there are
  35 # too many false positives.
  36 #
  37 .if ${COMPILER_VERSION} <  50000
  38 NO_WERROR.gcc=  yes
  39 .endif
  40
  41 # -pedantic is problematic because it also imposes namespace restrictions
  42 #CFLAGS+=       -pedantic
  43 .if defined(WARNS)
  44 .if ${WARNS} >= 1
  45 CWARNFLAGS+=    -Wsystem-headers
  46 .if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
  47 CWARNFLAGS+=    -Werror
  48 .endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
  49 .endif # WARNS >= 1
  50 .if ${WARNS} >= 2
  51 CWARNFLAGS+=    -Wall -Wno-format-y2k
  52 .endif # WARNS >= 2
  53 .if ${WARNS} >= 3
  54 CWARNFLAGS+=    -W -Wno-unused-parameter -Wstrict-prototypes\
  55                 -Wmissing-prototypes -Wpointer-arith
  56 .endif # WARNS >= 3
  57 .if ${WARNS} >= 4
  58 CWARNFLAGS+=    -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\
  59                 -Wunused-parameter
  60 .if !defined(NO_WCAST_ALIGN) && !defined(NO_WCAST_ALIGN.${COMPILER_TYPE})
  61 CWARNFLAGS+=    -Wcast-align
  62 .endif # !NO_WCAST_ALIGN !NO_WCAST_ALIGN.${COMPILER_TYPE}
  63 .endif # WARNS >= 4
  64 .if ${WARNS} >= 6
  65 CWARNFLAGS+=    -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\
  66                 -Wold-style-definition
  67 .if !defined(NO_WMISSING_VARIABLE_DECLARATIONS)
  68 CWARNFLAGS.clang+=      -Wmissing-variable-declarations
  69 .endif
  70 .if !defined(NO_WTHREAD_SAFETY)
  71 CWARNFLAGS.clang+=      -Wthread-safety
  72 .endif
  73 .endif # WARNS >= 6
  74 .if ${WARNS} >= 2 && ${WARNS} <= 4
  75 # XXX Delete -Wuninitialized by default for now -- the compiler doesn't
  76 # XXX always get it right.
  77 CWARNFLAGS+=    -Wno-uninitialized
  78 .endif # WARNS >=2 && WARNS <= 4
  79 CWARNFLAGS+=    -Wno-pointer-sign
  80 # Clang has more warnings enabled by default, and when using -Wall, so if WARNS
  81 # is set to low values, these have to be disabled explicitly.
  82 .if ${WARNS} <= 6
  83 CWARNFLAGS.clang+=      -Wno-empty-body -Wno-string-plus-int
  84 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30400
  85 CWARNFLAGS.clang+=      -Wno-unused-const-variable
  86 .endif
  87 .endif # WARNS <= 6
  88 .if ${WARNS} <= 3
  89 CWARNFLAGS.clang+=      -Wno-tautological-compare -Wno-unused-value\
  90                 -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion
  91 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
  92 CWARNFLAGS.clang+=      -Wno-unused-local-typedef
  93 .endif
  94 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 40000
  95 CWARNFLAGS.clang+=      -Wno-address-of-packed-member
  96 .endif
  97 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 70000 && \
  98     ${MACHINE_CPUARCH} == "arm" && !${MACHINE_ARCH:Marmv[67]*}
  99 CWARNFLAGS.clang+=      -Wno-atomic-alignment
 100 .endif
 101 .endif # WARNS <= 3
 102 .if ${WARNS} <= 2
 103 CWARNFLAGS.clang+=      -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
 104 .endif # WARNS <= 2
 105 .if ${WARNS} <= 1
 106 CWARNFLAGS.clang+=      -Wno-parentheses
 107 .endif # WARNS <= 1
 108 .if defined(NO_WARRAY_BOUNDS)
 109 CWARNFLAGS.clang+=      -Wno-array-bounds
 110 .endif # NO_WARRAY_BOUNDS
 111 .if defined(NO_WMISLEADING_INDENTATION) && \
 112     ((${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 100000) || \
 113      (${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100))
 114 CWARNFLAGS+=            -Wno-misleading-indentation
 115 .endif # NO_WMISLEADING_INDENTATION
 116 .endif # WARNS
 117
 118 .if defined(FORMAT_AUDIT)
 119 WFORMAT=        1
 120 .endif # FORMAT_AUDIT
 121 .if defined(WFORMAT)
 122 .if ${WFORMAT} > 0
 123 #CWARNFLAGS+=   -Wformat-nonliteral -Wformat-security -Wno-format-extra-args
 124 CWARNFLAGS+=    -Wformat=2 -Wno-format-extra-args
 125 .if ${WARNS} <= 3
 126 CWARNFLAGS.clang+=      -Wno-format-nonliteral
 127 .endif # WARNS <= 3
 128 .if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
 129 CWARNFLAGS+=    -Werror
 130 .endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
 131 .endif # WFORMAT > 0
 132 .endif # WFORMAT
 133 .if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE})
 134 CWARNFLAGS+=    -Wno-format
 135 .endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE}
 136
 137 # GCC 5.2.0
 138 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200
 139 CWARNFLAGS+=    -Wno-error=address                      \
 140                 -Wno-error=array-bounds                 \
 141                 -Wno-error=attributes                   \
 142                 -Wno-error=bool-compare                 \
 143                 -Wno-error=cast-align                   \
 144                 -Wno-error=clobbered                    \
 145                 -Wno-error=deprecated-declarations      \
 146                 -Wno-error=enum-compare                 \
 147                 -Wno-error=extra                        \
 148                 -Wno-error=inline                       \
 149                 -Wno-error=logical-not-parentheses      \
 150                 -Wno-error=strict-aliasing              \
 151                 -Wno-error=uninitialized                \
 152                 -Wno-error=unused-but-set-variable      \
 153                 -Wno-error=unused-function              \
 154                 -Wno-error=unused-value
 155 .endif
 156
 157 # GCC 6.1.0
 158 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100
 159 CWARNFLAGS+=    -Wno-error=empty-body                   \
 160                 -Wno-error=nonnull-compare              \
 161                 -Wno-error=shift-negative-value         \
 162                 -Wno-error=tautological-compare         \
 163                 -Wno-error=unused-const-variable
 164 .endif
 165
 166 # GCC 7.1.0
 167 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 70100
 168 CWARNFLAGS+=    -Wno-error=bool-operation               \
 169                 -Wno-error=deprecated                   \
 170                 -Wno-error=expansion-to-defined         \
 171                 -Wno-error=format-overflow              \
 172                 -Wno-error=format-truncation            \
 173                 -Wno-error=implicit-fallthrough         \
 174                 -Wno-error=int-in-bool-context          \
 175                 -Wno-error=memset-elt-size              \
 176                 -Wno-error=noexcept-type                \
 177                 -Wno-error=nonnull                      \
 178                 -Wno-error=pointer-compare              \
 179                 -Wno-error=stringop-overflow
 180 .endif
 181
 182 # GCC 8.1.0
 183 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 80100
 184 CWARNFLAGS+=    -Wno-error=aggressive-loop-optimizations        \
 185                 -Wno-error=cast-function-type                   \
 186                 -Wno-error=catch-value                          \
 187                 -Wno-error=multistatement-macros                \
 188                 -Wno-error=restrict                             \
 189                 -Wno-error=sizeof-pointer-memaccess             \
 190                 -Wno-error=stringop-truncation
 191 .endif
 192
 193 # How to handle FreeBSD custom printf format specifiers.
 194 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
 195 FORMAT_EXTENSIONS=      -D__printf__=__freebsd_kprintf__
 196 .else
 197 FORMAT_EXTENSIONS=      -fformat-extensions
 198 .endif
 199
 200 .if defined(IGNORE_PRAGMA)
 201 CWARNFLAGS+=    -Wno-unknown-pragmas
 202 .endif # IGNORE_PRAGMA
 203
 204 # This warning is utter nonsense
 205 CFLAGS+=        -Wno-format-zero-length
 206
 207 # We need this conditional because many places that use it
 208 # only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}.
 209 # unconditionally, and can't easily use the CFLAGS.clang=
 210 # mechanism.
 211 .if ${COMPILER_TYPE} == "clang"
 212 CLANG_NO_IAS=    -no-integrated-as
 213 .endif
 214 CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
 215                  -mllvm -simplifycfg-dup-ret
 216 .if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700
 217 CLANG_OPT_SMALL+= -mllvm -enable-gvn=false
 218 .else
 219 CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
 220 .endif
 221 CFLAGS.clang+=   -Qunused-arguments
 222 .if ${MACHINE_CPUARCH} == "sparc64"
 223 # Don't emit .cfi directives, since we must use GNU as on sparc64, for now.
 224 CFLAGS.clang+=   -fno-dwarf2-cfi-asm
 225 .endif # SPARC64
 226 # The libc++ headers use c++11 extensions.  These are normally silenced because
 227 # they are treated as system headers, but we explicitly disable that warning
 228 # suppression when building the base system to catch bugs in our headers.
 229 # Eventually we'll want to start building the base system C++ code as C++11,
 230 # but not yet.
 231 CXXFLAGS.clang+=         -Wno-c++11-extensions
 232
 233 .if ${MK_SSP} != "no" && \
 234     ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
 235 .if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \
 236     (${COMPILER_TYPE} == "gcc" && \
 237      (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900))
 238 # Don't use -Wstack-protector as it breaks world with -Werror.
 239 SSP_CFLAGS?=    -fstack-protector-strong
 240 .else
 241 SSP_CFLAGS?=    -fstack-protector
 242 .endif
 243 CFLAGS+=        ${SSP_CFLAGS}
 244 .endif # SSP && !ARM && !MIPS
 245
 246 # Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is
 247 # enabled.
 248 DEBUG_FILES_CFLAGS?= -g
 249
 250 # Allow user-specified additional warning flags, plus compiler and file
 251 # specific flag overrides, unless we've overridden this...
 252 .if ${MK_WARNS} != "no"
 253 CFLAGS+=        ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}}
 254 CFLAGS+=        ${CWARNFLAGS.${.IMPSRC:T}}
 255 CXXFLAGS+=      ${CXXWARNFLAGS:M*} ${CXXWARNFLAGS.${COMPILER_TYPE}}
 256 CXXFLAGS+=      ${CXXWARNFLAGS.${.IMPSRC:T}}
 257 .endif
 258
 259 CFLAGS+=         ${CFLAGS.${COMPILER_TYPE}}
 260 CXXFLAGS+=       ${CXXFLAGS.${COMPILER_TYPE}}
 261
 262 AFLAGS+=        ${AFLAGS.${.IMPSRC:T}}
 263 ACFLAGS+=       ${ACFLAGS.${.IMPSRC:T}}
 264 CFLAGS+=        ${CFLAGS.${.IMPSRC:T}}
 265 CXXFLAGS+=      ${CXXFLAGS.${.IMPSRC:T}}
 266
 267 LDFLAGS+=       ${LDFLAGS.${LINKER_TYPE}}
 268
 269 .if defined(SRCTOP)
 270 # Prevent rebuilding during install to support read-only objdirs.
 271 .if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta)
 272 CFLAGS+=        ERROR-tried-to-rebuild-during-make-install
 273 .endif
 274 .endif
 275
 276 # Tell bmake not to mistake standard targets for things to be searched for
 277 # or expect to ever be up-to-date.
 278 PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \
 279                 beforelinking build build-tools buildconfig buildfiles \
 280                 buildincludes check checkdpadd clean cleandepend cleandir \
 281                 cleanobj configure depend distclean distribute exe \
 282                 files html includes install installconfig installdirs \
 283                 installfiles installincludes lint obj objlink objs objwarn \
 284                 realinstall tags whereobj
 285
 286 # we don't want ${PROG} to be PHONY
 287 .PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
 288 .NOTMAIN: ${PHONY_NOTMAIN:Nall}
 289
 290 .if ${MK_STAGING} != "no"
 291 .if defined(_SKIP_BUILD) || (!make(all) && !make(clean*) && !make(*clean))
 292 _SKIP_STAGING?= yes
 293 .endif
 294 .if ${_SKIP_STAGING:Uno} == "yes"
 295 staging stage_libs stage_files stage_as stage_links stage_symlinks:
 296 .else
 297 # allow targets like beforeinstall to be leveraged
 298 DESTDIR= ${STAGE_OBJTOP}
 299 .export DESTDIR
 300
 301 .if target(beforeinstall)
 302 .if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
 303 staging: beforeinstall
 304 .endif
 305 .endif
 306
 307 # normally only libs and includes are staged
 308 .if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)
 309 STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
 310
 311 .if !empty(PROG)
 312 .if defined(PROGNAME)
 313 STAGE_AS_SETS+= prog
 314 STAGE_AS_${PROG}= ${PROGNAME}
 315 stage_as.prog: ${PROG}
 316 .else
 317 STAGE_SETS+= prog
 318 stage_files.prog: ${PROG}
 319 STAGE_TARGETS+= stage_files
 320 .endif
 321 .endif
 322 .endif
 323
 324 .if !empty(_LIBS) && !defined(INTERNALLIB)
 325 .if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
 326 STAGE_SETS+= shlib
 327 STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
 328 STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
 329 stage_files.shlib: ${_LIBS:M*.so.*}
 330 .endif
 331
 332 .if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
 333 STAGE_AS_SETS+= ldscript
 334 STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
 335 stage_as.ldscript: ${SHLIB_LINK:R}.ld
 336 STAGE_DIR.ldscript = ${STAGE_LIBDIR}
 337 STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
 338 NO_SHLIB_LINKS=
 339 .endif
 340
 341 .if target(stage_files.shlib)
 342 stage_libs: ${_LIBS}
 343 .if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
 344 stage_files.shlib: ${SHLIB_NAME}.symbols
 345 .endif
 346 .else
 347 stage_libs: ${_LIBS}
 348 .endif
 349 .if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
 350 stage_libs: ${SHLIB_NAME}.symbols
 351 .endif
 352
 353 .endif
 354
 355 .if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
 356 .if !defined(NO_BEFOREBUILD_INCLUDES)
 357 stage_includes: buildincludes
 358 beforebuild: stage_includes
 359 .endif
 360 .endif
 361
 362 .for t in stage_libs stage_files stage_as
 363 .if target($t)
 364 STAGE_TARGETS+= $t
 365 .endif
 366 .endfor
 367
 368 .if !empty(STAGE_AS_SETS)
 369 STAGE_TARGETS+= stage_as
 370 .endif
 371
 372 .if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
 373
 374 .if !empty(LINKS)
 375 STAGE_TARGETS+= stage_links
 376 .if ${MAKE_VERSION} < 20131001
 377 stage_links.links: ${_LIBS} ${PROG}
 378 .endif
 379 STAGE_SETS+= links
 380 STAGE_LINKS.links= ${LINKS}
 381 .endif
 382
 383 .if !empty(SYMLINKS)
 384 STAGE_TARGETS+= stage_symlinks
 385 STAGE_SETS+= links
 386 STAGE_SYMLINKS.links= ${SYMLINKS}
 387 .endif
 388
 389 .endif
 390
 391 .include <meta.stage.mk>
 392 .endif
 393 .endif
 394
 395 .if defined(META_TARGETS)
 396 .for _tgt in ${META_TARGETS}
 397 .if target(${_tgt})
 398 ${_tgt}: ${META_DEPS}
 399 .endif
 400 .endfor
 401 .endif