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