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} == "gcc" && ${COMPILER_VERSION} >= 90100
  98 CWARNFLAGS.gcc+=        -Wno-address-of-packed-member
  99 .endif
 100 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 70000 && \
 101     ${MACHINE_CPUARCH} == "arm" && !${MACHINE_ARCH:Marmv[67]*}
 102 CWARNFLAGS.clang+=      -Wno-atomic-alignment
 103 .endif
 104 .endif # WARNS <= 3
 105 .if ${WARNS} <= 2
 106 CWARNFLAGS.clang+=      -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
 107 .endif # WARNS <= 2
 108 .if ${WARNS} <= 1
 109 CWARNFLAGS.clang+=      -Wno-parentheses
 110 .endif # WARNS <= 1
 111 .if defined(NO_WARRAY_BOUNDS)
 112 CWARNFLAGS.clang+=      -Wno-array-bounds
 113 .endif # NO_WARRAY_BOUNDS
 114 .if defined(NO_WMISLEADING_INDENTATION) && \
 115     ((${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 100000) || \
 116      (${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100))
 117 CWARNFLAGS+=            -Wno-misleading-indentation
 118 .endif # NO_WMISLEADING_INDENTATION
 119 .endif # WARNS
 120
 121 .if defined(FORMAT_AUDIT)
 122 WFORMAT=        1
 123 .endif # FORMAT_AUDIT
 124 .if defined(WFORMAT)
 125 .if ${WFORMAT} > 0
 126 #CWARNFLAGS+=   -Wformat-nonliteral -Wformat-security -Wno-format-extra-args
 127 CWARNFLAGS+=    -Wformat=2 -Wno-format-extra-args
 128 .if ${WARNS} <= 3
 129 CWARNFLAGS.clang+=      -Wno-format-nonliteral
 130 .endif # WARNS <= 3
 131 .if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
 132 CWARNFLAGS+=    -Werror
 133 .endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
 134 .endif # WFORMAT > 0
 135 .endif # WFORMAT
 136 .if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE})
 137 CWARNFLAGS+=    -Wno-format
 138 .endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE}
 139
 140 # GCC 5.2.0
 141 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200
 142 CWARNFLAGS+=    -Wno-error=address                      \
 143                 -Wno-error=array-bounds                 \
 144                 -Wno-error=attributes                   \
 145                 -Wno-error=bool-compare                 \
 146                 -Wno-error=cast-align                   \
 147                 -Wno-error=clobbered                    \
 148                 -Wno-error=deprecated-declarations      \
 149                 -Wno-error=enum-compare                 \
 150                 -Wno-error=extra                        \
 151                 -Wno-error=inline                       \
 152                 -Wno-error=logical-not-parentheses      \
 153                 -Wno-error=strict-aliasing              \
 154                 -Wno-error=uninitialized                \
 155                 -Wno-error=unused-but-set-variable      \
 156                 -Wno-error=unused-function              \
 157                 -Wno-error=unused-value
 158 .endif
 159
 160 # GCC 6.1.0
 161 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100
 162 CWARNFLAGS+=    -Wno-error=nonnull-compare              \
 163                 -Wno-error=shift-negative-value         \
 164                 -Wno-error=tautological-compare         \
 165                 -Wno-error=unused-const-variable
 166 .endif
 167
 168 # GCC 7.1.0
 169 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 70100
 170 CWARNFLAGS+=    -Wno-error=bool-operation               \
 171                 -Wno-error=deprecated                   \
 172                 -Wno-error=expansion-to-defined         \
 173                 -Wno-error=format-overflow              \
 174                 -Wno-error=format-truncation            \
 175                 -Wno-error=implicit-fallthrough         \
 176                 -Wno-error=int-in-bool-context          \
 177                 -Wno-error=memset-elt-size              \
 178                 -Wno-error=noexcept-type                \
 179                 -Wno-error=nonnull                      \
 180                 -Wno-error=pointer-compare              \
 181                 -Wno-error=stringop-overflow
 182 .endif
 183
 184 # GCC 8.1.0
 185 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 80100
 186 CWARNFLAGS+=    -Wno-error=aggressive-loop-optimizations        \
 187                 -Wno-error=cast-function-type                   \
 188                 -Wno-error=catch-value                          \
 189                 -Wno-error=multistatement-macros                \
 190                 -Wno-error=restrict                             \
 191                 -Wno-error=sizeof-pointer-memaccess             \
 192                 -Wno-error=stringop-truncation
 193 .endif
 194
 195 # How to handle FreeBSD custom printf format specifiers.
 196 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
 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 CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
 210                  -mllvm -simplifycfg-dup-ret
 211 .if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700
 212 CLANG_OPT_SMALL+= -mllvm -enable-gvn=false
 213 .else
 214 CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
 215 .endif
 216 CFLAGS.clang+=   -Qunused-arguments
 217 # The libc++ headers use c++11 extensions.  These are normally silenced because
 218 # they are treated as system headers, but we explicitly disable that warning
 219 # suppression when building the base system to catch bugs in our headers.
 220 # Eventually we'll want to start building the base system C++ code as C++11,
 221 # but not yet.
 222 CXXFLAGS.clang+=         -Wno-c++11-extensions
 223
 224 .if ${MK_SSP} != "no" && \
 225     ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
 226 .if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \
 227     (${COMPILER_TYPE} == "gcc" && \
 228      (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900))
 229 # Don't use -Wstack-protector as it breaks world with -Werror.
 230 SSP_CFLAGS?=    -fstack-protector-strong
 231 .else
 232 SSP_CFLAGS?=    -fstack-protector
 233 .endif
 234 CFLAGS+=        ${SSP_CFLAGS}
 235 .endif # SSP && !ARM && !MIPS
 236
 237 # Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is
 238 # enabled.
 239 DEBUG_FILES_CFLAGS?= -g
 240
 241 # Allow user-specified additional warning flags, plus compiler and file
 242 # specific flag overrides, unless we've overridden this...
 243 .if ${MK_WARNS} != "no"
 244 CFLAGS+=        ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}}
 245 CFLAGS+=        ${CWARNFLAGS.${.IMPSRC:T}}
 246 CXXFLAGS+=      ${CXXWARNFLAGS:M*} ${CXXWARNFLAGS.${COMPILER_TYPE}}
 247 CXXFLAGS+=      ${CXXWARNFLAGS.${.IMPSRC:T}}
 248 .endif
 249
 250 CFLAGS+=         ${CFLAGS.${COMPILER_TYPE}}
 251 CXXFLAGS+=       ${CXXFLAGS.${COMPILER_TYPE}}
 252
 253 AFLAGS+=        ${AFLAGS.${.IMPSRC:T}}
 254 AFLAGS+=        ${AFLAGS.${.TARGET:T}}
 255 ACFLAGS+=       ${ACFLAGS.${.IMPSRC:T}}
 256 ACFLAGS+=       ${ACFLAGS.${.TARGET:T}}
 257 CFLAGS+=        ${CFLAGS.${.IMPSRC:T}}
 258 CXXFLAGS+=      ${CXXFLAGS.${.IMPSRC:T}}
 259
 260 LDFLAGS+=       ${LDFLAGS.${LINKER_TYPE}}
 261
 262 # Only allow .TARGET when not using PROGS as it has the same syntax
 263 # per PROG which is ambiguous with this syntax. This is only needed
 264 # for PROG_VARS vars.
 265 .if !defined(_RECURSING_PROGS)
 266 .if ${MK_WARNS} != "no"
 267 CFLAGS+=        ${CWARNFLAGS.${.TARGET:T}}
 268 .endif
 269 CFLAGS+=        ${CFLAGS.${.TARGET:T}}
 270 CXXFLAGS+=      ${CXXFLAGS.${.TARGET:T}}
 271 LDFLAGS+=       ${LDFLAGS.${.TARGET:T}}
 272 LDADD+=         ${LDADD.${.TARGET:T}}
 273 LIBADD+=        ${LIBADD.${.TARGET:T}}
 274 .endif
 275
 276 .if defined(SRCTOP)
 277 # Prevent rebuilding during install to support read-only objdirs.
 278 .if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta)
 279 CFLAGS+=        ERROR-tried-to-rebuild-during-make-install
 280 .endif
 281 .endif
 282
 283 # Tell bmake not to mistake standard targets for things to be searched for
 284 # or expect to ever be up-to-date.
 285 PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \
 286                 beforelinking build build-tools buildconfig buildfiles \
 287                 buildincludes check checkdpadd clean cleandepend cleandir \
 288                 cleanobj configure depend distclean distribute exe \
 289                 files html includes install installconfig installdirs \
 290                 installfiles installincludes lint obj objlink objs objwarn \
 291                 realinstall tags whereobj
 292
 293 # we don't want ${PROG} to be PHONY
 294 .PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
 295 .NOTMAIN: ${PHONY_NOTMAIN:Nall}
 296
 297 .if ${MK_STAGING} != "no"
 298 .if defined(_SKIP_BUILD) || (!make(all) && !make(clean*) && !make(*clean))
 299 _SKIP_STAGING?= yes
 300 .endif
 301 .if ${_SKIP_STAGING:Uno} == "yes"
 302 staging stage_libs stage_files stage_as stage_links stage_symlinks:
 303 .else
 304 # allow targets like beforeinstall to be leveraged
 305 DESTDIR= ${STAGE_OBJTOP}
 306 .export DESTDIR
 307
 308 .if target(beforeinstall)
 309 .if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
 310 staging: beforeinstall
 311 .endif
 312 .endif
 313
 314 # normally only libs and includes are staged
 315 .if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)
 316 STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
 317
 318 .if !empty(PROG)
 319 .if defined(PROGNAME)
 320 STAGE_AS_SETS+= prog
 321 STAGE_AS_${PROG}= ${PROGNAME}
 322 stage_as.prog: ${PROG}
 323 .else
 324 STAGE_SETS+= prog
 325 stage_files.prog: ${PROG}
 326 STAGE_TARGETS+= stage_files
 327 .endif
 328 .endif
 329 .endif
 330
 331 .if !empty(_LIBS) && !defined(INTERNALLIB)
 332 .if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
 333 STAGE_SETS+= shlib
 334 STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
 335 STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
 336 stage_files.shlib: ${_LIBS:M*.so.*}
 337 .endif
 338
 339 .if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
 340 STAGE_AS_SETS+= ldscript
 341 STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
 342 stage_as.ldscript: ${SHLIB_LINK:R}.ld
 343 STAGE_DIR.ldscript = ${STAGE_LIBDIR}
 344 STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
 345 NO_SHLIB_LINKS=
 346 .endif
 347
 348 .if target(stage_files.shlib)
 349 stage_libs: ${_LIBS}
 350 .if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
 351 stage_files.shlib: ${SHLIB_NAME}.symbols
 352 .endif
 353 .else
 354 stage_libs: ${_LIBS}
 355 .endif
 356 .if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
 357 stage_libs: ${SHLIB_NAME}.symbols
 358 .endif
 359
 360 .endif
 361
 362 .if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
 363 .if !defined(NO_BEFOREBUILD_INCLUDES)
 364 stage_includes: buildincludes
 365 beforebuild: stage_includes
 366 .endif
 367 .endif
 368
 369 .for t in stage_libs stage_files stage_as
 370 .if target($t)
 371 STAGE_TARGETS+= $t
 372 .endif
 373 .endfor
 374
 375 .if !empty(STAGE_AS_SETS)
 376 STAGE_TARGETS+= stage_as
 377 .endif
 378
 379 .if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
 380
 381 .if !empty(LINKS)
 382 STAGE_TARGETS+= stage_links
 383 .if ${MAKE_VERSION} < 20131001
 384 stage_links.links: ${_LIBS} ${PROG}
 385 .endif
 386 STAGE_SETS+= links
 387 STAGE_LINKS.links= ${LINKS}
 388 .endif
 389
 390 .if !empty(SYMLINKS)
 391 STAGE_TARGETS+= stage_symlinks
 392 STAGE_SETS+= links
 393 STAGE_SYMLINKS.links= ${SYMLINKS}
 394 .endif
 395
 396 .endif
 397
 398 .include <meta.stage.mk>
 399 .endif
 400 .endif
 401
 402 .if defined(META_TARGETS)
 403 .for _tgt in ${META_TARGETS}
 404 .if target(${_tgt})
 405 ${_tgt}: ${META_DEPS}
 406 .endif
 407 .endfor
 408 .endif