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 .endif # WARNS <= 6
  75 .if ${WARNS} <= 3
  76 CWARNFLAGS.clang+=      -Wno-tautological-compare -Wno-unused-value\
  77                 -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion
  78 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
  79 CWARNFLAGS.clang+=      -Wno-unused-local-typedef
  80 .endif
  81 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 40000
  82 CWARNFLAGS.clang+=      -Wno-address-of-packed-member
  83 .endif
  84 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 70000 && \
  85     ${MACHINE_CPUARCH} == "arm" && !${MACHINE_ARCH:Marmv[67]*}
  86 CWARNFLAGS.clang+=      -Wno-atomic-alignment
  87 .endif
  88 .endif # WARNS <= 3
  89 .if ${WARNS} <= 2
  90 CWARNFLAGS.clang+=      -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
  91 .endif # WARNS <= 2
  92 .if ${WARNS} <= 1
  93 CWARNFLAGS.clang+=      -Wno-parentheses
  94 .endif # WARNS <= 1
  95 .if defined(NO_WARRAY_BOUNDS)
  96 CWARNFLAGS.clang+=      -Wno-array-bounds
  97 .endif # NO_WARRAY_BOUNDS
  98 .endif # WARNS
  99
 100 .if defined(FORMAT_AUDIT)
 101 WFORMAT=        1
 102 .endif # FORMAT_AUDIT
 103 .if defined(WFORMAT)
 104 .if ${WFORMAT} > 0
 105 #CWARNFLAGS+=   -Wformat-nonliteral -Wformat-security -Wno-format-extra-args
 106 CWARNFLAGS+=    -Wformat=2 -Wno-format-extra-args
 107 .if ${WARNS} <= 3
 108 CWARNFLAGS.clang+=      -Wno-format-nonliteral
 109 .endif # WARNS <= 3
 110 .if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
 111 CWARNFLAGS+=    -Werror
 112 .endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
 113 .endif # WFORMAT > 0
 114 .endif # WFORMAT
 115 .if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE})
 116 CWARNFLAGS+=    -Wno-format
 117 .endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE}
 118
 119 # GCC 5.2.0
 120 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200
 121 CWARNFLAGS+=    -Wno-error=address                      \
 122                 -Wno-error=array-bounds                 \
 123                 -Wno-error=attributes                   \
 124                 -Wno-error=bool-compare                 \
 125                 -Wno-error=cast-align                   \
 126                 -Wno-error=clobbered                    \
 127                 -Wno-error=enum-compare                 \
 128                 -Wno-error=extra                        \
 129                 -Wno-error=inline                       \
 130                 -Wno-error=logical-not-parentheses      \
 131                 -Wno-error=strict-aliasing              \
 132                 -Wno-error=uninitialized                \
 133                 -Wno-error=unused-but-set-variable      \
 134                 -Wno-error=unused-function              \
 135                 -Wno-error=unused-value
 136 .endif
 137
 138 # GCC 6.1.0
 139 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100
 140 CWARNFLAGS+=    -Wno-error=misleading-indentation       \
 141                 -Wno-error=nonnull-compare              \
 142                 -Wno-error=shift-negative-value         \
 143                 -Wno-error=tautological-compare         \
 144                 -Wno-error=unused-const-variable
 145 .endif
 146
 147 # How to handle FreeBSD custom printf format specifiers.
 148 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
 149 FORMAT_EXTENSIONS=      -D__printf__=__freebsd_kprintf__
 150 .else
 151 FORMAT_EXTENSIONS=      -fformat-extensions
 152 .endif
 153
 154 .if defined(IGNORE_PRAGMA)
 155 CWARNFLAGS+=    -Wno-unknown-pragmas
 156 .endif # IGNORE_PRAGMA
 157
 158 # We need this conditional because many places that use it
 159 # only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}.
 160 # unconditionally, and can't easily use the CFLAGS.clang=
 161 # mechanism.
 162 .if ${COMPILER_TYPE} == "clang"
 163 CLANG_NO_IAS=    -no-integrated-as
 164 .endif
 165 CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
 166                  -mllvm -simplifycfg-dup-ret
 167 .if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700
 168 CLANG_OPT_SMALL+= -mllvm -enable-gvn=false
 169 .else
 170 CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
 171 .endif
 172 CFLAGS.clang+=   -Qunused-arguments
 173 .if ${MACHINE_CPUARCH} == "sparc64"
 174 # Don't emit .cfi directives, since we must use GNU as on sparc64, for now.
 175 CFLAGS.clang+=   -fno-dwarf2-cfi-asm
 176 .endif # SPARC64
 177 # The libc++ headers use c++11 extensions.  These are normally silenced because
 178 # they are treated as system headers, but we explicitly disable that warning
 179 # suppression when building the base system to catch bugs in our headers.
 180 # Eventually we'll want to start building the base system C++ code as C++11,
 181 # but not yet.
 182 CXXFLAGS.clang+=         -Wno-c++11-extensions
 183
 184 .if ${MK_SSP} != "no" && \
 185     ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
 186 .if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \
 187     (${COMPILER_TYPE} == "gcc" && \
 188      (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900))
 189 # Don't use -Wstack-protector as it breaks world with -Werror.
 190 SSP_CFLAGS?=    -fstack-protector-strong
 191 .else
 192 SSP_CFLAGS?=    -fstack-protector
 193 .endif
 194 CFLAGS+=        ${SSP_CFLAGS}
 195 .endif # SSP && !ARM && !MIPS
 196
 197 # Allow user-specified additional warning flags, plus compiler and file
 198 # specific flag overrides, unless we've overriden this...
 199 .if ${MK_WARNS} != "no"
 200 CFLAGS+=        ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}}
 201 CFLAGS+=        ${CWARNFLAGS.${.IMPSRC:T}}
 202 .endif
 203
 204 CFLAGS+=         ${CFLAGS.${COMPILER_TYPE}}
 205 CXXFLAGS+=       ${CXXFLAGS.${COMPILER_TYPE}}
 206
 207 AFLAGS+=        ${AFLAGS.${.IMPSRC:T}}
 208 ACFLAGS+=       ${ACFLAGS.${.IMPSRC:T}}
 209 CFLAGS+=        ${CFLAGS.${.IMPSRC:T}}
 210 CXXFLAGS+=      ${CXXFLAGS.${.IMPSRC:T}}
 211
 212 .if defined(SRCTOP)
 213 # Prevent rebuilding during install to support read-only objdirs.
 214 .if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta)
 215 CFLAGS+=        ERROR-tried-to-rebuild-during-make-install
 216 .endif
 217 .endif
 218
 219 # Tell bmake not to mistake standard targets for things to be searched for
 220 # or expect to ever be up-to-date.
 221 PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \
 222                 beforelinking build build-tools buildconfig buildfiles \
 223                 buildincludes check checkdpadd clean cleandepend cleandir \
 224                 cleanobj configure depend distclean distribute exe \
 225                 files html includes install installconfig installfiles \
 226                 installincludes lint obj objlink objs objwarn \
 227                 realinstall tags whereobj
 228
 229 # we don't want ${PROG} to be PHONY
 230 .PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
 231 .NOTMAIN: ${PHONY_NOTMAIN:Nall}
 232
 233 .if ${MK_STAGING} != "no"
 234 .if defined(_SKIP_BUILD) || (!make(all) && !make(clean*))
 235 _SKIP_STAGING?= yes
 236 .endif
 237 .if ${_SKIP_STAGING:Uno} == "yes"
 238 staging stage_libs stage_files stage_as stage_links stage_symlinks:
 239 .else
 240 # allow targets like beforeinstall to be leveraged
 241 DESTDIR= ${STAGE_OBJTOP}
 242 .export DESTDIR
 243
 244 .if target(beforeinstall)
 245 .if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
 246 staging: beforeinstall
 247 .endif
 248 .endif
 249
 250 # normally only libs and includes are staged
 251 .if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)
 252 STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
 253
 254 .if !empty(PROG)
 255 .if defined(PROGNAME)
 256 STAGE_AS_SETS+= prog
 257 STAGE_AS_${PROG}= ${PROGNAME}
 258 stage_as.prog: ${PROG}
 259 .else
 260 STAGE_SETS+= prog
 261 stage_files.prog: ${PROG}
 262 STAGE_TARGETS+= stage_files
 263 .endif
 264 .endif
 265 .endif
 266
 267 .if !empty(_LIBS) && !defined(INTERNALLIB)
 268 .if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
 269 STAGE_SETS+= shlib
 270 STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
 271 STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
 272 stage_files.shlib: ${_LIBS:M*.so.*}
 273 .endif
 274
 275 .if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
 276 STAGE_AS_SETS+= ldscript
 277 STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
 278 stage_as.ldscript: ${SHLIB_LINK:R}.ld
 279 STAGE_DIR.ldscript = ${STAGE_LIBDIR}
 280 STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
 281 NO_SHLIB_LINKS=
 282 .endif
 283
 284 .if target(stage_files.shlib)
 285 stage_libs: ${_LIBS}
 286 .if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
 287 stage_files.shlib: ${SHLIB_NAME}.symbols
 288 .endif
 289 .else
 290 stage_libs: ${_LIBS}
 291 .endif
 292 .if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
 293 stage_libs: ${SHLIB_NAME}.symbols
 294 .endif
 295
 296 .endif
 297
 298 .if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
 299 .if !defined(NO_BEFOREBUILD_INCLUDES)
 300 stage_includes: buildincludes
 301 beforebuild: stage_includes
 302 .endif
 303 .endif
 304
 305 .for t in stage_libs stage_files stage_as
 306 .if target($t)
 307 STAGE_TARGETS+= $t
 308 .endif
 309 .endfor
 310
 311 .if !empty(STAGE_AS_SETS)
 312 STAGE_TARGETS+= stage_as
 313 .endif
 314
 315 .if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
 316
 317 .if !empty(LINKS)
 318 STAGE_TARGETS+= stage_links
 319 .if ${MAKE_VERSION} < 20131001
 320 stage_links.links: ${_LIBS} ${PROG}
 321 .endif
 322 STAGE_SETS+= links
 323 STAGE_LINKS.links= ${LINKS}
 324 .endif
 325
 326 .if !empty(SYMLINKS)
 327 STAGE_TARGETS+= stage_symlinks
 328 STAGE_SETS+= links
 329 STAGE_SYMLINKS.links= ${SYMLINKS}
 330 .endif
 331
 332 .endif
 333
 334 .include <meta.stage.mk>
 335 .endif
 336 .endif
 337
 338 .if defined(META_TARGETS)
 339 .for _tgt in ${META_TARGETS}
 340 .if target(${_tgt})
 341 ${_tgt}: ${META_DEPS}
 342 .endif
 343 .endfor
 344 .endif