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