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