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 GCC:   http://gcc.gnu.org/onlinedocs/gcc-4.2.1/gcc/Warning-Options.html
  10
  11 .include <bsd.compiler.mk>
  12
  13 # the default is gnu99 for now
  14 CSTD?=          gnu99
  15
  16 .if ${CSTD} == "k&r"
  17 CFLAGS+=        -traditional
  18 .elif ${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 # BDECFLAGS
  51 .if ${WARNS} >= 6
  52 CWARNFLAGS+=    -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\
  53                 -Wold-style-definition
  54 .if !defined(NO_WMISSING_VARIABLE_DECLARATIONS)
  55 CWARNFLAGS.clang+=      -Wmissing-variable-declarations
  56 .endif
  57 .if !defined(NO_WTHREAD_SAFETY)
  58 CWARNFLAGS.clang+=      -Wthread-safety
  59 .endif
  60 .endif # WARNS >= 6
  61 .if ${WARNS} >= 2 && ${WARNS} <= 4
  62 # XXX Delete -Wuninitialized by default for now -- the compiler doesn't
  63 # XXX always get it right.
  64 CWARNFLAGS+=    -Wno-uninitialized
  65 .endif # WARNS >=2 && WARNS <= 4
  66 CWARNFLAGS+=    -Wno-pointer-sign
  67 # Clang has more warnings enabled by default, and when using -Wall, so if WARNS
  68 # is set to low values, these have to be disabled explicitly.
  69 .if ${WARNS} <= 6
  70 CWARNFLAGS.clang+=      -Wno-empty-body -Wno-string-plus-int
  71 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30400
  72 CWARNFLAGS.clang+=      -Wno-unused-const-variable
  73 .endif
  74 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 60000
  75 CWARNFLAGS.clang+=      -Wno-error=tautological-constant-compare
  76 .endif
  77 .endif # WARNS <= 6
  78 .if ${WARNS} <= 3
  79 CWARNFLAGS.clang+=      -Wno-tautological-compare -Wno-unused-value\
  80                 -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion
  81 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
  82 CWARNFLAGS.clang+=      -Wno-unused-local-typedef
  83 .endif
  84 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 40000
  85 CWARNFLAGS.clang+=      -Wno-address-of-packed-member
  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=deprecated                   \
 149                 -Wno-error=pointer-compare              \
 150                 -Wno-error=format-truncation            \
 151                 -Wno-error=implicit-fallthrough         \
 152                 -Wno-error=expansion-to-defined         \
 153                 -Wno-error=int-in-bool-context          \
 154                 -Wno-error=bool-operation               \
 155                 -Wno-error=format-overflow              \
 156                 -Wno-error=stringop-overflow            \
 157                 -Wno-error=memset-elt-size              \
 158                 -Wno-error=int-in-bool-context          \
 159                 -Wno-error=unused-const-variable        \
 160                 -Wno-error=nonnull
 161 .endif
 162
 163 # How to handle FreeBSD custom printf format specifiers.
 164 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
 165 FORMAT_EXTENSIONS=      -D__printf__=__freebsd_kprintf__
 166 .else
 167 FORMAT_EXTENSIONS=      -fformat-extensions
 168 .endif
 169
 170 .if defined(IGNORE_PRAGMA)
 171 CWARNFLAGS+=    -Wno-unknown-pragmas
 172 .endif # IGNORE_PRAGMA
 173
 174 # We need this conditional because many places that use it
 175 # only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}.
 176 # unconditionally, and can't easily use the CFLAGS.clang=
 177 # mechanism.
 178 .if ${COMPILER_TYPE} == "clang"
 179 CLANG_NO_IAS=    -no-integrated-as
 180 .endif
 181 CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
 182                  -mllvm -simplifycfg-dup-ret
 183 .if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700
 184 CLANG_OPT_SMALL+= -mllvm -enable-gvn=false
 185 .else
 186 CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
 187 .endif
 188 CFLAGS.clang+=   -Qunused-arguments
 189 .if ${MACHINE_CPUARCH} == "sparc64"
 190 # Don't emit .cfi directives, since we must use GNU as on sparc64, for now.
 191 CFLAGS.clang+=   -fno-dwarf2-cfi-asm
 192 .endif # SPARC64
 193 # The libc++ headers use c++11 extensions.  These are normally silenced because
 194 # they are treated as system headers, but we explicitly disable that warning
 195 # suppression when building the base system to catch bugs in our headers.
 196 # Eventually we'll want to start building the base system C++ code as C++11,
 197 # but not yet.
 198 CXXFLAGS.clang+=         -Wno-c++11-extensions
 199
 200 .if ${MK_SSP} != "no" && \
 201     ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
 202 .if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \
 203     (${COMPILER_TYPE} == "gcc" && \
 204      (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900))
 205 # Don't use -Wstack-protector as it breaks world with -Werror.
 206 SSP_CFLAGS?=    -fstack-protector-strong
 207 .else
 208 SSP_CFLAGS?=    -fstack-protector
 209 .endif
 210 CFLAGS+=        ${SSP_CFLAGS}
 211 .endif # SSP && !ARM && !MIPS
 212
 213 # Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is
 214 # enabled.
 215 DEBUG_FILES_CFLAGS?= -g
 216
 217 # Allow user-specified additional warning flags, plus compiler and file
 218 # specific flag overrides, unless we've overriden this...
 219 .if ${MK_WARNS} != "no"
 220 CFLAGS+=        ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}}
 221 CFLAGS+=        ${CWARNFLAGS.${.IMPSRC:T}}
 222 .endif
 223
 224 CFLAGS+=         ${CFLAGS.${COMPILER_TYPE}}
 225 CXXFLAGS+=       ${CXXFLAGS.${COMPILER_TYPE}}
 226
 227 AFLAGS+=        ${AFLAGS.${.IMPSRC:T}}
 228 ACFLAGS+=       ${ACFLAGS.${.IMPSRC:T}}
 229 CFLAGS+=        ${CFLAGS.${.IMPSRC:T}}
 230 CXXFLAGS+=      ${CXXFLAGS.${.IMPSRC:T}}
 231
 232 .if defined(SRCTOP)
 233 # Prevent rebuilding during install to support read-only objdirs.
 234 .if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta)
 235 CFLAGS+=        ERROR-tried-to-rebuild-during-make-install
 236 .endif
 237 .endif
 238
 239 # Tell bmake not to mistake standard targets for things to be searched for
 240 # or expect to ever be up-to-date.
 241 PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \
 242                 beforelinking build build-tools buildconfig buildfiles \
 243                 buildincludes check checkdpadd clean cleandepend cleandir \
 244                 cleanobj configure depend distclean distribute exe \
 245                 files html includes install installconfig installfiles \
 246                 installincludes lint obj objlink objs objwarn \
 247                 realinstall tags whereobj
 248
 249 # we don't want ${PROG} to be PHONY
 250 .PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
 251 .NOTMAIN: ${PHONY_NOTMAIN:Nall}
 252
 253 .if ${MK_STAGING} != "no"
 254 .if defined(_SKIP_BUILD) || (!make(all) && !make(clean*))
 255 _SKIP_STAGING?= yes
 256 .endif
 257 .if ${_SKIP_STAGING:Uno} == "yes"
 258 staging stage_libs stage_files stage_as stage_links stage_symlinks:
 259 .else
 260 # allow targets like beforeinstall to be leveraged
 261 DESTDIR= ${STAGE_OBJTOP}
 262 .export DESTDIR
 263
 264 .if target(beforeinstall)
 265 .if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
 266 staging: beforeinstall
 267 .endif
 268 .endif
 269
 270 # normally only libs and includes are staged
 271 .if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)
 272 STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
 273
 274 .if !empty(PROG)
 275 .if defined(PROGNAME)
 276 STAGE_AS_SETS+= prog
 277 STAGE_AS_${PROG}= ${PROGNAME}
 278 stage_as.prog: ${PROG}
 279 .else
 280 STAGE_SETS+= prog
 281 stage_files.prog: ${PROG}
 282 STAGE_TARGETS+= stage_files
 283 .endif
 284 .endif
 285 .endif
 286
 287 .if !empty(_LIBS) && !defined(INTERNALLIB)
 288 .if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
 289 STAGE_SETS+= shlib
 290 STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
 291 STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
 292 stage_files.shlib: ${_LIBS:M*.so.*}
 293 .endif
 294
 295 .if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
 296 STAGE_AS_SETS+= ldscript
 297 STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
 298 stage_as.ldscript: ${SHLIB_LINK:R}.ld
 299 STAGE_DIR.ldscript = ${STAGE_LIBDIR}
 300 STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
 301 NO_SHLIB_LINKS=
 302 .endif
 303
 304 .if target(stage_files.shlib)
 305 stage_libs: ${_LIBS}
 306 .if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
 307 stage_files.shlib: ${SHLIB_NAME}.symbols
 308 .endif
 309 .else
 310 stage_libs: ${_LIBS}
 311 .endif
 312 .if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
 313 stage_libs: ${SHLIB_NAME}.symbols
 314 .endif
 315
 316 .endif
 317
 318 .if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
 319 .if !defined(NO_BEFOREBUILD_INCLUDES)
 320 stage_includes: buildincludes
 321 beforebuild: stage_includes
 322 .endif
 323 .endif
 324
 325 .for t in stage_libs stage_files stage_as
 326 .if target($t)
 327 STAGE_TARGETS+= $t
 328 .endif
 329 .endfor
 330
 331 .if !empty(STAGE_AS_SETS)
 332 STAGE_TARGETS+= stage_as
 333 .endif
 334
 335 .if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
 336
 337 .if !empty(LINKS)
 338 STAGE_TARGETS+= stage_links
 339 .if ${MAKE_VERSION} < 20131001
 340 stage_links.links: ${_LIBS} ${PROG}
 341 .endif
 342 STAGE_SETS+= links
 343 STAGE_LINKS.links= ${LINKS}
 344 .endif
 345
 346 .if !empty(SYMLINKS)
 347 STAGE_TARGETS+= stage_symlinks
 348 STAGE_SETS+= links
 349 STAGE_SYMLINKS.links= ${SYMLINKS}
 350 .endif
 351
 352 .endif
 353
 354 .include <meta.stage.mk>
 355 .endif
 356 .endif
 357
 358 .if defined(META_TARGETS)
 359 .for _tgt in ${META_TARGETS}
 360 .if target(${_tgt})
 361 ${_tgt}: ${META_DEPS}
 362 .endif
 363 .endfor
 364 .endif