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