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 .endif # WARNS
 112
 113 .if defined(FORMAT_AUDIT)
 114 WFORMAT=        1
 115 .endif # FORMAT_AUDIT
 116 .if defined(WFORMAT)
 117 .if ${WFORMAT} > 0
 118 #CWARNFLAGS+=   -Wformat-nonliteral -Wformat-security -Wno-format-extra-args
 119 CWARNFLAGS+=    -Wformat=2 -Wno-format-extra-args
 120 .if ${WARNS} <= 3
 121 CWARNFLAGS.clang+=      -Wno-format-nonliteral
 122 .endif # WARNS <= 3
 123 .if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
 124 CWARNFLAGS+=    -Werror
 125 .endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
 126 .endif # WFORMAT > 0
 127 .endif # WFORMAT
 128 .if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE})
 129 CWARNFLAGS+=    -Wno-format
 130 .endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE}
 131
 132 # GCC 5.2.0
 133 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200
 134 CWARNFLAGS+=    -Wno-error=address                      \
 135                 -Wno-error=array-bounds                 \
 136                 -Wno-error=attributes                   \
 137                 -Wno-error=bool-compare                 \
 138                 -Wno-error=cast-align                   \
 139                 -Wno-error=clobbered                    \
 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_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100
 153 CWARNFLAGS+=    -Wno-error=misleading-indentation       \
 154                 -Wno-error=nonnull-compare              \
 155                 -Wno-error=shift-negative-value         \
 156                 -Wno-error=tautological-compare         \
 157                 -Wno-error=unused-const-variable
 158 .endif
 159
 160 # GCC 7.1.0
 161 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 70100
 162 CWARNFLAGS+=    -Wno-error=bool-operation               \
 163                 -Wno-error=deprecated                   \
 164                 -Wno-error=expansion-to-defined         \
 165                 -Wno-error=format-overflow              \
 166                 -Wno-error=format-truncation            \
 167                 -Wno-error=implicit-fallthrough         \
 168                 -Wno-error=int-in-bool-context          \
 169                 -Wno-error=memset-elt-size              \
 170                 -Wno-error=noexcept-type                \
 171                 -Wno-error=nonnull                      \
 172                 -Wno-error=pointer-compare              \
 173                 -Wno-error=stringop-overflow
 174 .endif
 175
 176 # GCC 8.1.0
 177 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 80100
 178 CWARNFLAGS+=    -Wno-error=aggressive-loop-optimizations        \
 179                 -Wno-error=cast-function-type                   \
 180                 -Wno-error=catch-value                          \
 181                 -Wno-error=multistatement-macros                \
 182                 -Wno-error=restrict                             \
 183                 -Wno-error=sizeof-pointer-memaccess             \
 184                 -Wno-error=stringop-truncation
 185 .endif
 186
 187 # How to handle FreeBSD custom printf format specifiers.
 188 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
 189 FORMAT_EXTENSIONS=      -D__printf__=__freebsd_kprintf__
 190 .else
 191 FORMAT_EXTENSIONS=      -fformat-extensions
 192 .endif
 193
 194 .if defined(IGNORE_PRAGMA)
 195 CWARNFLAGS+=    -Wno-unknown-pragmas
 196 .endif # IGNORE_PRAGMA
 197
 198 # We need this conditional because many places that use it
 199 # only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}.
 200 # unconditionally, and can't easily use the CFLAGS.clang=
 201 # mechanism.
 202 .if ${COMPILER_TYPE} == "clang"
 203 CLANG_NO_IAS=    -no-integrated-as
 204 .endif
 205 CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
 206                  -mllvm -simplifycfg-dup-ret
 207 .if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700
 208 CLANG_OPT_SMALL+= -mllvm -enable-gvn=false
 209 .else
 210 CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
 211 .endif
 212 CFLAGS.clang+=   -Qunused-arguments
 213 .if ${MACHINE_CPUARCH} == "sparc64"
 214 # Don't emit .cfi directives, since we must use GNU as on sparc64, for now.
 215 CFLAGS.clang+=   -fno-dwarf2-cfi-asm
 216 .endif # SPARC64
 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 ACFLAGS+=       ${ACFLAGS.${.IMPSRC:T}}
 255 CFLAGS+=        ${CFLAGS.${.IMPSRC:T}}
 256 CXXFLAGS+=      ${CXXFLAGS.${.IMPSRC:T}}
 257
 258 LDFLAGS+=       ${LDFLAGS.${LINKER_TYPE}}
 259
 260 .if defined(SRCTOP)
 261 # Prevent rebuilding during install to support read-only objdirs.
 262 .if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta)
 263 CFLAGS+=        ERROR-tried-to-rebuild-during-make-install
 264 .endif
 265 .endif
 266
 267 # Tell bmake not to mistake standard targets for things to be searched for
 268 # or expect to ever be up-to-date.
 269 PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \
 270                 beforelinking build build-tools buildconfig buildfiles \
 271                 buildincludes check checkdpadd clean cleandepend cleandir \
 272                 cleanobj configure depend distclean distribute exe \
 273                 files html includes install installconfig installdirs \
 274                 installfiles installincludes lint obj objlink objs objwarn \
 275                 realinstall tags whereobj
 276
 277 # we don't want ${PROG} to be PHONY
 278 .PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
 279 .NOTMAIN: ${PHONY_NOTMAIN:Nall}
 280
 281 .if ${MK_STAGING} != "no"
 282 .if defined(_SKIP_BUILD) || (!make(all) && !make(clean*))
 283 _SKIP_STAGING?= yes
 284 .endif
 285 .if ${_SKIP_STAGING:Uno} == "yes"
 286 staging stage_libs stage_files stage_as stage_links stage_symlinks:
 287 .else
 288 # allow targets like beforeinstall to be leveraged
 289 DESTDIR= ${STAGE_OBJTOP}
 290 .export DESTDIR
 291
 292 .if target(beforeinstall)
 293 .if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
 294 staging: beforeinstall
 295 .endif
 296 .endif
 297
 298 # normally only libs and includes are staged
 299 .if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)
 300 STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
 301
 302 .if !empty(PROG)
 303 .if defined(PROGNAME)
 304 STAGE_AS_SETS+= prog
 305 STAGE_AS_${PROG}= ${PROGNAME}
 306 stage_as.prog: ${PROG}
 307 .else
 308 STAGE_SETS+= prog
 309 stage_files.prog: ${PROG}
 310 STAGE_TARGETS+= stage_files
 311 .endif
 312 .endif
 313 .endif
 314
 315 .if !empty(_LIBS) && !defined(INTERNALLIB)
 316 .if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
 317 STAGE_SETS+= shlib
 318 STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
 319 STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
 320 stage_files.shlib: ${_LIBS:M*.so.*}
 321 .endif
 322
 323 .if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
 324 STAGE_AS_SETS+= ldscript
 325 STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
 326 stage_as.ldscript: ${SHLIB_LINK:R}.ld
 327 STAGE_DIR.ldscript = ${STAGE_LIBDIR}
 328 STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
 329 NO_SHLIB_LINKS=
 330 .endif
 331
 332 .if target(stage_files.shlib)
 333 stage_libs: ${_LIBS}
 334 .if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
 335 stage_files.shlib: ${SHLIB_NAME}.symbols
 336 .endif
 337 .else
 338 stage_libs: ${_LIBS}
 339 .endif
 340 .if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
 341 stage_libs: ${SHLIB_NAME}.symbols
 342 .endif
 343
 344 .endif
 345
 346 .if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
 347 .if !defined(NO_BEFOREBUILD_INCLUDES)
 348 stage_includes: buildincludes
 349 beforebuild: stage_includes
 350 .endif
 351 .endif
 352
 353 .for t in stage_libs stage_files stage_as
 354 .if target($t)
 355 STAGE_TARGETS+= $t
 356 .endif
 357 .endfor
 358
 359 .if !empty(STAGE_AS_SETS)
 360 STAGE_TARGETS+= stage_as
 361 .endif
 362
 363 .if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
 364
 365 .if !empty(LINKS)
 366 STAGE_TARGETS+= stage_links
 367 .if ${MAKE_VERSION} < 20131001
 368 stage_links.links: ${_LIBS} ${PROG}
 369 .endif
 370 STAGE_SETS+= links
 371 STAGE_LINKS.links= ${LINKS}
 372 .endif
 373
 374 .if !empty(SYMLINKS)
 375 STAGE_TARGETS+= stage_symlinks
 376 STAGE_SETS+= links
 377 STAGE_SYMLINKS.links= ${SYMLINKS}
 378 .endif
 379
 380 .endif
 381
 382 .include <meta.stage.mk>
 383 .endif
 384 .endif
 385
 386 .if defined(META_TARGETS)
 387 .for _tgt in ${META_TARGETS}
 388 .if target(${_tgt})
 389 ${_tgt}: ${META_DEPS}
 390 .endif
 391 .endfor
 392 .endif