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 .endif # WARNS <= 3
  82 .if ${WARNS} <= 2
  83 CWARNFLAGS.clang+=      -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
  84 .endif # WARNS <= 2
  85 .if ${WARNS} <= 1
  86 CWARNFLAGS.clang+=      -Wno-parentheses
  87 .endif # WARNS <= 1
  88 .if defined(NO_WARRAY_BOUNDS)
  89 CWARNFLAGS.clang+=      -Wno-array-bounds
  90 .endif # NO_WARRAY_BOUNDS
  91 .endif # WARNS
  92
  93 .if defined(FORMAT_AUDIT)
  94 WFORMAT=        1
  95 .endif # FORMAT_AUDIT
  96 .if defined(WFORMAT)
  97 .if ${WFORMAT} > 0
  98 #CWARNFLAGS+=   -Wformat-nonliteral -Wformat-security -Wno-format-extra-args
  99 CWARNFLAGS+=    -Wformat=2 -Wno-format-extra-args
 100 .if ${WARNS} <= 3
 101 CWARNFLAGS.clang+=      -Wno-format-nonliteral
 102 .endif # WARNS <= 3
 103 .if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
 104 CWARNFLAGS+=    -Werror
 105 .endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
 106 .endif # WFORMAT > 0
 107 .endif # WFORMAT
 108 .if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE})
 109 CWARNFLAGS+=    -Wno-format
 110 .endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE}
 111
 112 # GCC 5.2.0
 113 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200
 114 CWARNFLAGS+=    -Wno-error=address                      \
 115                 -Wno-error=array-bounds                 \
 116                 -Wno-error=attributes                   \
 117                 -Wno-error=bool-compare                 \
 118                 -Wno-error=cast-align                   \
 119                 -Wno-error=clobbered                    \
 120                 -Wno-error=enum-compare                 \
 121                 -Wno-error=extra                        \
 122                 -Wno-error=inline                       \
 123                 -Wno-error=logical-not-parentheses      \
 124                 -Wno-error=strict-aliasing              \
 125                 -Wno-error=uninitialized                \
 126                 -Wno-error=unused-but-set-variable      \
 127                 -Wno-error=unused-function              \
 128                 -Wno-error=unused-value
 129 .endif
 130
 131 # GCC 5.3.0
 132 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50300
 133 CWARNFLAGS+=    -Wno-error=strict-overflow
 134 .endif
 135
 136 # GCC 6.1.0
 137 .if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100
 138 CWARNFLAGS+=    -Wno-error=misleading-indentation       \
 139                 -Wno-error=nonnull-compare              \
 140                 -Wno-error=shift-negative-value         \
 141                 -Wno-error=tautological-compare         \
 142                 -Wno-error=unused-const-variable
 143 .endif
 144
 145 # How to handle FreeBSD custom printf format specifiers.
 146 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
 147 FORMAT_EXTENSIONS=      -D__printf__=__freebsd_kprintf__
 148 .else
 149 FORMAT_EXTENSIONS=      -fformat-extensions
 150 .endif
 151
 152 .if defined(IGNORE_PRAGMA)
 153 CWARNFLAGS+=    -Wno-unknown-pragmas
 154 .endif # IGNORE_PRAGMA
 155
 156 # We need this conditional because many places that use it
 157 # only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}.
 158 # unconditionally, and can't easily use the CFLAGS.clang=
 159 # mechanism.
 160 .if ${COMPILER_TYPE} == "clang"
 161 CLANG_NO_IAS=    -no-integrated-as
 162 .endif
 163 CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
 164                  -mllvm -simplifycfg-dup-ret
 165 .if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700
 166 CLANG_OPT_SMALL+= -mllvm -enable-gvn=false
 167 .else
 168 CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
 169 .endif
 170 CFLAGS.clang+=   -Qunused-arguments
 171 .if ${MACHINE_CPUARCH} == "sparc64"
 172 # Don't emit .cfi directives, since we must use GNU as on sparc64, for now.
 173 CFLAGS.clang+=   -fno-dwarf2-cfi-asm
 174 .endif # SPARC64
 175 # The libc++ headers use c++11 extensions.  These are normally silenced because
 176 # they are treated as system headers, but we explicitly disable that warning
 177 # suppression when building the base system to catch bugs in our headers.
 178 # Eventually we'll want to start building the base system C++ code as C++11,
 179 # but not yet.
 180 CXXFLAGS.clang+=         -Wno-c++11-extensions
 181
 182 .if ${MK_SSP} != "no" && \
 183     ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
 184 .if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \
 185     (${COMPILER_TYPE} == "gcc" && \
 186      (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900))
 187 # Don't use -Wstack-protector as it breaks world with -Werror.
 188 SSP_CFLAGS?=    -fstack-protector-strong
 189 .else
 190 SSP_CFLAGS?=    -fstack-protector
 191 .endif
 192 CFLAGS+=        ${SSP_CFLAGS}
 193 .endif # SSP && !ARM && !MIPS
 194
 195 # Allow user-specified additional warning flags, plus compiler and file
 196 # specific flag overrides, unless we've overriden this...
 197 .if ${MK_WARNS} != "no"
 198 CFLAGS+=        ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}}
 199 CFLAGS+=        ${CWARNFLAGS.${.IMPSRC:T}}
 200 .endif
 201
 202 CFLAGS+=         ${CFLAGS.${COMPILER_TYPE}}
 203 CXXFLAGS+=       ${CXXFLAGS.${COMPILER_TYPE}}
 204
 205 AFLAGS+=        ${AFLAGS.${.IMPSRC:T}}
 206 ACFLAGS+=       ${ACFLAGS.${.IMPSRC:T}}
 207 CFLAGS+=        ${CFLAGS.${.IMPSRC:T}}
 208 CXXFLAGS+=      ${CXXFLAGS.${.IMPSRC:T}}
 209
 210 .if defined(SRCTOP)
 211 # Prevent rebuilding during install to support read-only objdirs.
 212 .if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta)
 213 CFLAGS+=        ERROR-tried-to-rebuild-during-make-install
 214 .endif
 215 .endif
 216
 217 # Tell bmake not to mistake standard targets for things to be searched for
 218 # or expect to ever be up-to-date.
 219 PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \
 220                 beforelinking build build-tools buildconfig buildfiles \
 221                 buildincludes check checkdpadd clean cleandepend cleandir \
 222                 cleanobj configure depend distclean distribute exe \
 223                 files html includes install installconfig installfiles \
 224                 installincludes lint obj objlink objs objwarn \
 225                 realinstall tags whereobj
 226
 227 # we don't want ${PROG} to be PHONY
 228 .PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
 229 .NOTMAIN: ${PHONY_NOTMAIN:Nall}
 230
 231 .if ${MK_STAGING} != "no"
 232 .if defined(_SKIP_BUILD) || (!make(all) && !make(clean*))
 233 _SKIP_STAGING?= yes
 234 .endif
 235 .if ${_SKIP_STAGING:Uno} == "yes"
 236 staging stage_libs stage_files stage_as stage_links stage_symlinks:
 237 .else
 238 # allow targets like beforeinstall to be leveraged
 239 DESTDIR= ${STAGE_OBJTOP}
 240 .export DESTDIR
 241
 242 .if target(beforeinstall)
 243 .if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
 244 staging: beforeinstall
 245 .endif
 246 .endif
 247
 248 # normally only libs and includes are staged
 249 .if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)
 250 STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
 251
 252 .if !empty(PROG)
 253 .if defined(PROGNAME)
 254 STAGE_AS_SETS+= prog
 255 STAGE_AS_${PROG}= ${PROGNAME}
 256 stage_as.prog: ${PROG}
 257 .else
 258 STAGE_SETS+= prog
 259 stage_files.prog: ${PROG}
 260 STAGE_TARGETS+= stage_files
 261 .endif
 262 .endif
 263 .endif
 264
 265 .if !empty(_LIBS) && !defined(INTERNALLIB)
 266 .if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
 267 STAGE_SETS+= shlib
 268 STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
 269 STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
 270 stage_files.shlib: ${_LIBS:M*.so.*}
 271 .endif
 272
 273 .if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
 274 STAGE_AS_SETS+= ldscript
 275 STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
 276 stage_as.ldscript: ${SHLIB_LINK:R}.ld
 277 STAGE_DIR.ldscript = ${STAGE_LIBDIR}
 278 STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
 279 NO_SHLIB_LINKS=
 280 .endif
 281
 282 .if target(stage_files.shlib)
 283 stage_libs: ${_LIBS}
 284 .if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
 285 stage_files.shlib: ${SHLIB_NAME}.symbols
 286 .endif
 287 .else
 288 stage_libs: ${_LIBS}
 289 .endif
 290 .if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
 291 stage_libs: ${SHLIB_NAME}.symbols
 292 .endif
 293
 294 .endif
 295
 296 .if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
 297 .if !defined(NO_BEFOREBUILD_INCLUDES)
 298 stage_includes: buildincludes
 299 beforebuild: stage_includes
 300 .endif
 301 .endif
 302
 303 .for t in stage_libs stage_files stage_as
 304 .if target($t)
 305 STAGE_TARGETS+= $t
 306 .endif
 307 .endfor
 308
 309 .if !empty(STAGE_AS_SETS)
 310 STAGE_TARGETS+= stage_as
 311 .endif
 312
 313 .if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
 314
 315 .if !empty(LINKS)
 316 STAGE_TARGETS+= stage_links
 317 .if ${MAKE_VERSION} < 20131001
 318 stage_links.links: ${_LIBS} ${PROG}
 319 .endif
 320 STAGE_SETS+= links
 321 STAGE_LINKS.links= ${LINKS}
 322 .endif
 323
 324 .if !empty(SYMLINKS)
 325 STAGE_TARGETS+= stage_symlinks
 326 STAGE_SETS+= links
 327 STAGE_SYMLINKS.links= ${SYMLINKS}
 328 .endif
 329
 330 .endif
 331
 332 .include <meta.stage.mk>
 333 .endif
 334 .endif
 335
 336 .if defined(META_TARGETS)
 337 .for _tgt in ${META_TARGETS}
 338 .if target(${_tgt})
 339 ${_tgt}: ${META_DEPS}
 340 .endif
 341 .endfor
 342 .endif