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:   https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
  10 # for clang: https://clang.llvm.org/docs/DiagnosticsReference.html
  11
  12 .include <bsd.compiler.mk>
  13
  14 # the default is gnu99 for now
  15 CSTD?=          gnu99
  16
  17 .if ${CSTD} == "c89" || ${CSTD} == "c90"
  18 CFLAGS+=        -std=iso9899:1990
  19 .elif ${CSTD} == "c94" || ${CSTD} == "c95"
  20 CFLAGS+=        -std=iso9899:199409
  21 .elif ${CSTD} == "c99"
  22 CFLAGS+=        -std=iso9899:1999
  23 .else # CSTD
  24 CFLAGS+=        -std=${CSTD}
  25 .endif # CSTD
  26
  27 .if !empty(CXXSTD)
  28 CXXFLAGS+=      -std=${CXXSTD}
  29 .endif
  30
  31 # -pedantic is problematic because it also imposes namespace restrictions
  32 #CFLAGS+=       -pedantic
  33 .if defined(WARNS)
  34 .if ${WARNS} >= 1
  35 CWARNFLAGS+=    -Wsystem-headers
  36 .if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
  37 CWARNFLAGS+=    -Werror
  38 .endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
  39 .endif # WARNS >= 1
  40 .if ${WARNS} >= 2
  41 CWARNFLAGS+=    -Wall -Wno-format-y2k
  42 .endif # WARNS >= 2
  43 .if ${WARNS} >= 3
  44 CWARNFLAGS+=    -W -Wno-unused-parameter -Wstrict-prototypes\
  45                 -Wmissing-prototypes -Wpointer-arith
  46 .endif # WARNS >= 3
  47 .if ${WARNS} >= 4
  48 CWARNFLAGS+=    -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\
  49                 -Wunused-parameter
  50 .if !defined(NO_WCAST_ALIGN) && !defined(NO_WCAST_ALIGN.${COMPILER_TYPE})
  51 CWARNFLAGS+=    -Wcast-align
  52 .endif # !NO_WCAST_ALIGN !NO_WCAST_ALIGN.${COMPILER_TYPE}
  53 .endif # WARNS >= 4
  54 .if ${WARNS} >= 6
  55 CWARNFLAGS+=    -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\
  56                 -Wold-style-definition
  57 .if !defined(NO_WMISSING_VARIABLE_DECLARATIONS)
  58 CWARNFLAGS.clang+=      -Wmissing-variable-declarations
  59 .endif
  60 .if !defined(NO_WTHREAD_SAFETY)
  61 CWARNFLAGS.clang+=      -Wthread-safety
  62 .endif
  63 .endif # WARNS >= 6
  64 .if ${WARNS} >= 2 && ${WARNS} <= 4
  65 # XXX Delete -Wuninitialized by default for now -- the compiler doesn't
  66 # XXX always get it right.
  67 CWARNFLAGS+=    -Wno-uninitialized
  68 .endif # WARNS >=2 && WARNS <= 4
  69 CWARNFLAGS+=    -Wno-pointer-sign
  70 # Clang has more warnings enabled by default, and when using -Wall, so if WARNS
  71 # is set to low values, these have to be disabled explicitly.
  72 .if ${WARNS} <= 6
  73 CWARNFLAGS.clang+=      -Wno-empty-body -Wno-string-plus-int
  74 CWARNFLAGS.clang+=      -Wno-unused-const-variable
  75 .endif # WARNS <= 6
  76 .if ${WARNS} <= 3
  77 CWARNFLAGS.clang+=      -Wno-tautological-compare -Wno-unused-value\
  78                 -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion
  79 CWARNFLAGS.clang+=      -Wno-unused-local-typedef
  80 CWARNFLAGS.clang+=      -Wno-address-of-packed-member
  81 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 90100
  82 CWARNFLAGS.gcc+=        -Wno-address-of-packed-member
  83 .endif
  84 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 70000 && \
  85     ${MACHINE_CPUARCH} == "arm" && !${MACHINE_ARCH:Marmv[67]*}
  86 CWARNFLAGS.clang+=      -Wno-atomic-alignment
  87 .endif
  88 .endif # WARNS <= 3
  89 .if ${WARNS} <= 2
  90 CWARNFLAGS.clang+=      -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
  91 .endif # WARNS <= 2
  92 .if ${WARNS} <= 1
  93 CWARNFLAGS.clang+=      -Wno-parentheses
  94 .endif # WARNS <= 1
  95 .if defined(NO_WARRAY_BOUNDS)
  96 CWARNFLAGS.clang+=      -Wno-array-bounds
  97 .endif # NO_WARRAY_BOUNDS
  98 .if defined(NO_WMISLEADING_INDENTATION) && \
  99     ((${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 100000) || \
 100       ${COMPILER_TYPE} == "gcc")
 101 CWARNFLAGS+=            -Wno-misleading-indentation
 102 .endif # NO_WMISLEADING_INDENTATION
 103 .endif # WARNS
 104
 105 .if defined(FORMAT_AUDIT)
 106 WFORMAT=        1
 107 .endif # FORMAT_AUDIT
 108 .if defined(WFORMAT)
 109 .if ${WFORMAT} > 0
 110 #CWARNFLAGS+=   -Wformat-nonliteral -Wformat-security -Wno-format-extra-args
 111 CWARNFLAGS+=    -Wformat=2 -Wno-format-extra-args
 112 .if ${WARNS} <= 3
 113 CWARNFLAGS.clang+=      -Wno-format-nonliteral
 114 .endif # WARNS <= 3
 115 .if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
 116 CWARNFLAGS+=    -Werror
 117 .endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
 118 .endif # WFORMAT > 0
 119 .endif # WFORMAT
 120 .if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE})
 121 CWARNFLAGS+=    -Wno-format
 122 .endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE}
 123
 124 # GCC
 125 # We should clean up warnings produced with these flags.
 126 # They were originally added as a quick hack to enable gcc5/6.
 127 # The base system requires at least GCC 6.4, but some ports
 128 # use this file with older compilers.  Request an exprun
 129 # before changing these.
 130 .if ${COMPILER_TYPE} == "gcc"
 131 # GCC 5.2.0
 132 .if ${COMPILER_VERSION} >= 50200
 133 CWARNFLAGS+=    -Wno-error=address                      \
 134                 -Wno-error=array-bounds                 \
 135                 -Wno-error=attributes                   \
 136                 -Wno-error=bool-compare                 \
 137                 -Wno-error=cast-align                   \
 138                 -Wno-error=clobbered                    \
 139                 -Wno-error=deprecated-declarations      \
 140                 -Wno-error=enum-compare                 \
 141                 -Wno-error=extra                        \
 142                 -Wno-error=inline                       \
 143                 -Wno-error=logical-not-parentheses      \
 144                 -Wno-error=strict-aliasing              \
 145                 -Wno-error=uninitialized                \
 146                 -Wno-error=unused-but-set-variable      \
 147                 -Wno-error=unused-function              \
 148                 -Wno-error=unused-value
 149 .endif
 150
 151 # GCC 6.1.0
 152 .if ${COMPILER_VERSION} >= 60100
 153 CWARNFLAGS+=    -Wno-error=empty-body                   \
 154                 -Wno-error=maybe-uninitialized          \
 155                 -Wno-error=nonnull-compare              \
 156                 -Wno-error=redundant-decls              \
 157                 -Wno-error=shift-negative-value         \
 158                 -Wno-error=tautological-compare         \
 159                 -Wno-error=unused-const-variable
 160 .endif
 161
 162 # GCC 7.1.0
 163 .if ${COMPILER_VERSION} >= 70100
 164 CWARNFLAGS+=    -Wno-error=bool-operation               \
 165                 -Wno-error=deprecated                   \
 166                 -Wno-error=expansion-to-defined         \
 167                 -Wno-error=format-overflow              \
 168                 -Wno-error=format-truncation            \
 169                 -Wno-error=implicit-fallthrough         \
 170                 -Wno-error=int-in-bool-context          \
 171                 -Wno-error=memset-elt-size              \
 172                 -Wno-error=noexcept-type                \
 173                 -Wno-error=nonnull                      \
 174                 -Wno-error=pointer-compare              \
 175                 -Wno-error=stringop-overflow
 176 .endif
 177
 178 # GCC 8.1.0
 179 .if ${COMPILER_VERSION} >= 80100
 180 CWARNFLAGS+=    -Wno-error=aggressive-loop-optimizations        \
 181                 -Wno-error=cast-function-type                   \
 182                 -Wno-error=catch-value                          \
 183                 -Wno-error=multistatement-macros                \
 184                 -Wno-error=restrict                             \
 185                 -Wno-error=sizeof-pointer-memaccess             \
 186                 -Wno-error=stringop-truncation
 187 .endif
 188
 189 # GCC's own arm_neon.h triggers various warnings
 190 .if ${MACHINE_CPUARCH} == "aarch64"
 191 CWARNFLAGS+=    -Wno-system-headers
 192 .endif
 193 .endif  # gcc
 194
 195 # How to handle FreeBSD custom printf format specifiers.
 196 .if ${COMPILER_TYPE} == "clang"
 197 FORMAT_EXTENSIONS=      -D__printf__=__freebsd_kprintf__
 198 .else
 199 FORMAT_EXTENSIONS=      -fformat-extensions
 200 .endif
 201
 202 .if defined(IGNORE_PRAGMA)
 203 CWARNFLAGS+=    -Wno-unknown-pragmas
 204 .endif # IGNORE_PRAGMA
 205
 206 # This warning is utter nonsense
 207 CFLAGS+=        -Wno-format-zero-length
 208
 209 .if ${COMPILER_TYPE} == "clang"
 210 # The headers provided by clang are incompatible with the FreeBSD headers.
 211 # If the version of clang is not one that has been patched to omit the
 212 # incompatible headers, we need to compile with -nobuiltininc and add the
 213 # resource dir to the end of the search paths. This ensures that headers such as
 214 # immintrin.h are still found but stddef.h, etc. are picked up from FreeBSD.
 215 #
 216 # XXX: This is a hack to support complete external installs of clang while
 217 # we work to synchronize our decleration guards with those in the clang tree.
 218 .if ${MK_CLANG_BOOTSTRAP:Uno} == "no" && \
 219     ${COMPILER_RESOURCE_DIR} != "unknown" && !defined(BOOTSTRAPPING)
 220 CFLAGS+=-nobuiltininc -idirafter ${COMPILER_RESOURCE_DIR}/include
 221 .endif
 222 .endif
 223
 224 CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
 225                  -mllvm -simplifycfg-dup-ret
 226 CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
 227 CFLAGS.clang+=   -Qunused-arguments
 228 # The libc++ headers use c++11 extensions.  These are normally silenced because
 229 # they are treated as system headers, but we explicitly disable that warning
 230 # suppression when building the base system to catch bugs in our headers.
 231 # Eventually we'll want to start building the base system C++ code as C++11,
 232 # but not yet.
 233 CXXFLAGS.clang+=         -Wno-c++11-extensions
 234
 235 .if ${MK_SSP} != "no" && \
 236     ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
 237 # Don't use -Wstack-protector as it breaks world with -Werror.
 238 SSP_CFLAGS?=    -fstack-protector-strong
 239 CFLAGS+=        ${SSP_CFLAGS}
 240 .endif # SSP && !ARM && !MIPS
 241
 242 # Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is
 243 # enabled.
 244 DEBUG_FILES_CFLAGS?= -g
 245
 246 # Allow user-specified additional warning flags, plus compiler and file
 247 # specific flag overrides, unless we've overridden this...
 248 .if ${MK_WARNS} != "no"
 249 CFLAGS+=        ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}}
 250 CFLAGS+=        ${CWARNFLAGS.${.IMPSRC:T}}
 251 CXXFLAGS+=      ${CXXWARNFLAGS:M*} ${CXXWARNFLAGS.${COMPILER_TYPE}}
 252 CXXFLAGS+=      ${CXXWARNFLAGS.${.IMPSRC:T}}
 253 .endif
 254
 255 CFLAGS+=         ${CFLAGS.${COMPILER_TYPE}}
 256 CXXFLAGS+=       ${CXXFLAGS.${COMPILER_TYPE}}
 257
 258 AFLAGS+=        ${AFLAGS.${.IMPSRC:T}}
 259 AFLAGS+=        ${AFLAGS.${.TARGET:T}}
 260 ACFLAGS+=       ${ACFLAGS.${.IMPSRC:T}}
 261 ACFLAGS+=       ${ACFLAGS.${.TARGET:T}}
 262 CFLAGS+=        ${CFLAGS.${.IMPSRC:T}}
 263 CXXFLAGS+=      ${CXXFLAGS.${.IMPSRC:T}}
 264
 265 LDFLAGS+=       ${LDFLAGS.${LINKER_TYPE}}
 266
 267 # Only allow .TARGET when not using PROGS as it has the same syntax
 268 # per PROG which is ambiguous with this syntax. This is only needed
 269 # for PROG_VARS vars.
 270 .if !defined(_RECURSING_PROGS)
 271 .if ${MK_WARNS} != "no"
 272 CFLAGS+=        ${CWARNFLAGS.${.TARGET:T}}
 273 .endif
 274 CFLAGS+=        ${CFLAGS.${.TARGET:T}}
 275 CXXFLAGS+=      ${CXXFLAGS.${.TARGET:T}}
 276 LDFLAGS+=       ${LDFLAGS.${.TARGET:T}}
 277 LDADD+=         ${LDADD.${.TARGET:T}}
 278 LIBADD+=        ${LIBADD.${.TARGET:T}}
 279 .endif
 280
 281 .if defined(SRCTOP)
 282 # Prevent rebuilding during install to support read-only objdirs.
 283 .if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta)
 284 CFLAGS+=        ERROR-tried-to-rebuild-during-make-install
 285 .endif
 286 .endif
 287
 288 # Please keep this if in sync with kern.mk
 289 .if ${LD} != "ld" && (${CC:[1]:H} != ${LD:[1]:H} || ${LD:[1]:T} != "ld")
 290 # Add -fuse-ld=${LD} if $LD is in a different directory or not called "ld".
 291 # Note: Clang 12+ will prefer --ld-path= over -fuse-ld=.
 292 .if ${COMPILER_TYPE} == "clang"
 293 # Note: Clang does not like relative paths in -fuse-ld so we map ld.lld -> lld.
 294 LDFLAGS+=       -fuse-ld=${LD:[1]:S/^ld.//1W}
 295 .else
 296 # GCC does not support an absolute path for -fuse-ld so we just print this
 297 # warning instead and let the user add the required symlinks.
 298 .warning LD (${LD}) is not the default linker for ${CC} but -fuse-ld= is not supported
 299 .endif
 300 .endif
 301
 302 # Tell bmake not to mistake standard targets for things to be searched for
 303 # or expect to ever be up-to-date.
 304 PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \
 305                 beforelinking build build-tools buildconfig buildfiles \
 306                 buildincludes check checkdpadd clean cleandepend cleandir \
 307                 cleanobj configure depend distclean distribute exe \
 308                 files html includes install installconfig installdirs \
 309                 installfiles installincludes lint obj objlink objs objwarn \
 310                 realinstall tags whereobj
 311
 312 # we don't want ${PROG} to be PHONY
 313 .PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
 314 .NOTMAIN: ${PHONY_NOTMAIN:Nall}
 315
 316 .if ${MK_STAGING} != "no"
 317 .if defined(_SKIP_BUILD) || (!make(all) && !make(clean*) && !make(*clean))
 318 _SKIP_STAGING?= yes
 319 .endif
 320 .if ${_SKIP_STAGING:Uno} == "yes"
 321 staging stage_libs stage_files stage_as stage_links stage_symlinks:
 322 .else
 323 # allow targets like beforeinstall to be leveraged
 324 DESTDIR= ${STAGE_OBJTOP}
 325 .export DESTDIR
 326
 327 .if target(beforeinstall)
 328 .if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
 329 staging: beforeinstall
 330 .endif
 331 .endif
 332
 333 # normally only libs and includes are staged
 334 .if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)
 335 STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
 336
 337 .if !empty(PROG)
 338 .if defined(PROGNAME)
 339 STAGE_AS_SETS+= prog
 340 STAGE_AS_${PROG}= ${PROGNAME}
 341 stage_as.prog: ${PROG}
 342 .else
 343 STAGE_SETS+= prog
 344 stage_files.prog: ${PROG}
 345 STAGE_TARGETS+= stage_files
 346 .endif
 347 .endif
 348 .endif
 349
 350 .if !empty(_LIBS) && !defined(INTERNALLIB)
 351 .if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
 352 STAGE_SETS+= shlib
 353 STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
 354 STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
 355 stage_files.shlib: ${_LIBS:M*.so.*}
 356 .endif
 357
 358 .if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
 359 STAGE_AS_SETS+= ldscript
 360 STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
 361 stage_as.ldscript: ${SHLIB_LINK:R}.ld
 362 STAGE_DIR.ldscript = ${STAGE_LIBDIR}
 363 STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
 364 NO_SHLIB_LINKS=
 365 .endif
 366
 367 .if target(stage_files.shlib)
 368 stage_libs: ${_LIBS}
 369 .if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
 370 stage_files.shlib: ${SHLIB_NAME}.symbols
 371 .endif
 372 .else
 373 stage_libs: ${_LIBS}
 374 .endif
 375 .if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
 376 stage_libs: ${SHLIB_NAME}.symbols
 377 .endif
 378
 379 .endif
 380
 381 .if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
 382 .if !defined(NO_BEFOREBUILD_INCLUDES)
 383 stage_includes: buildincludes
 384 beforebuild: stage_includes
 385 .endif
 386 .endif
 387
 388 .for t in stage_libs stage_files stage_as
 389 .if target($t)
 390 STAGE_TARGETS+= $t
 391 .endif
 392 .endfor
 393
 394 .if !empty(STAGE_AS_SETS)
 395 STAGE_TARGETS+= stage_as
 396 .endif
 397
 398 .if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
 399
 400 .if !empty(LINKS)
 401 STAGE_TARGETS+= stage_links
 402 .if ${MAKE_VERSION} < 20131001
 403 stage_links.links: ${_LIBS} ${PROG}
 404 .endif
 405 STAGE_SETS+= links
 406 STAGE_LINKS.links= ${LINKS}
 407 .endif
 408
 409 .if !empty(SYMLINKS)
 410 STAGE_TARGETS+= stage_symlinks
 411 STAGE_SETS+= links
 412 STAGE_SYMLINKS.links= ${SYMLINKS}
 413 .endif
 414
 415 .endif
 416
 417 .include <meta.stage.mk>
 418 .endif
 419 .endif
 420
 421 .if defined(META_TARGETS)
 422 .for _tgt in ${META_TARGETS}
 423 .if target(${_tgt})
 424 ${_tgt}: ${META_DEPS}
 425 .endif
 426 .endfor
 427 .endif