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