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: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html 10# for clang: https://clang.llvm.org/docs/DiagnosticsReference.html 11 12.include <bsd.compiler.mk> 13 14# the default is gnu99 for now 15CSTD?= gnu99 16 17.if ${CSTD} == "c89" || ${CSTD} == "c90" 18CFLAGS+= -std=iso9899:1990 19.elif ${CSTD} == "c94" || ${CSTD} == "c95" 20CFLAGS+= -std=iso9899:199409 21.elif ${CSTD} == "c99" 22CFLAGS+= -std=iso9899:1999 23.else # CSTD 24CFLAGS+= -std=${CSTD} 25.endif # CSTD 26 27.if !empty(CXXSTD) 28CXXFLAGS+= -std=${CXXSTD} 29.endif 30 31# This gives the Makefile we're evaluating at the top-level a chance to set 32# WARNS. If it doesn't do so, we may freely pull a DEFAULTWARNS if it's set 33# and use that. This allows us to default WARNS to 6 for src builds without 34# needing to set the default in various Makefile.inc. 35.if !defined(WARNS) && defined(DEFAULTWARNS) 36WARNS= ${DEFAULTWARNS} 37.endif 38 39# -pedantic is problematic because it also imposes namespace restrictions 40#CFLAGS+= -pedantic 41.if defined(WARNS) 42.if ${WARNS} >= 1 43CWARNFLAGS+= -Wsystem-headers 44.if ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no" 45CWARNFLAGS+= -Werror 46.endif # ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no" 47.endif # WARNS >= 1 48.if ${WARNS} >= 2 49CWARNFLAGS+= -Wall -Wno-format-y2k 50.endif # WARNS >= 2 51.if ${WARNS} >= 3 52CWARNFLAGS+= -W -Wno-unused-parameter -Wstrict-prototypes\ 53 -Wmissing-prototypes -Wpointer-arith 54.endif # WARNS >= 3 55.if ${WARNS} >= 4 56CWARNFLAGS+= -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\ 57 -Wunused-parameter 58.if !defined(NO_WCAST_ALIGN) && !defined(NO_WCAST_ALIGN.${COMPILER_TYPE}) 59CWARNFLAGS+= -Wcast-align 60.endif # !NO_WCAST_ALIGN !NO_WCAST_ALIGN.${COMPILER_TYPE} 61.endif # WARNS >= 4 62.if ${WARNS} >= 6 63CWARNFLAGS+= -Wchar-subscripts -Wnested-externs \ 64 -Wold-style-definition 65.if !defined(NO_WMISSING_VARIABLE_DECLARATIONS) 66CWARNFLAGS.clang+= -Wmissing-variable-declarations 67.endif 68.if !defined(NO_WTHREAD_SAFETY) 69CWARNFLAGS.clang+= -Wthread-safety 70.endif 71.endif # WARNS >= 6 72.if ${WARNS} >= 2 && ${WARNS} <= 4 73# XXX Delete -Wuninitialized by default for now -- the compiler doesn't 74# XXX always get it right. 75CWARNFLAGS+= -Wno-uninitialized 76.endif # WARNS >=2 && WARNS <= 4 77CWARNFLAGS+= -Wno-pointer-sign 78# Clang has more warnings enabled by default, and when using -Wall, so if WARNS 79# is set to low values, these have to be disabled explicitly. 80.if ${WARNS} <= 6 81CWARNFLAGS.clang+= -Wno-empty-body -Wno-string-plus-int 82CWARNFLAGS.clang+= -Wno-unused-const-variable 83.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 130000 84CWARNFLAGS.clang+= -Wno-error=unused-but-set-variable 85.endif 86.endif # WARNS <= 6 87.if ${WARNS} <= 3 88CWARNFLAGS.clang+= -Wno-tautological-compare -Wno-unused-value\ 89 -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion 90CWARNFLAGS.clang+= -Wno-unused-local-typedef 91CWARNFLAGS.clang+= -Wno-address-of-packed-member 92.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 90100 93CWARNFLAGS.gcc+= -Wno-address-of-packed-member 94.endif 95.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 70000 && \ 96 ${MACHINE_CPUARCH} == "arm" && !${MACHINE_ARCH:Marmv[67]*} 97CWARNFLAGS.clang+= -Wno-atomic-alignment 98.endif 99.endif # WARNS <= 3 100.if ${WARNS} <= 2 101CWARNFLAGS.clang+= -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter 102.endif # WARNS <= 2 103.if ${WARNS} <= 1 104CWARNFLAGS.clang+= -Wno-parentheses 105.endif # WARNS <= 1 106.if defined(NO_WARRAY_BOUNDS) 107CWARNFLAGS.clang+= -Wno-array-bounds 108.endif # NO_WARRAY_BOUNDS 109.if defined(NO_WMISLEADING_INDENTATION) && \ 110 ((${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 100000) || \ 111 ${COMPILER_TYPE} == "gcc") 112CWARNFLAGS+= -Wno-misleading-indentation 113.endif # NO_WMISLEADING_INDENTATION 114.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 140000 115NO_WBITWISE_INSTEAD_OF_LOGICAL= -Wno-bitwise-instead-of-logical 116.endif 117.endif # WARNS 118 119.if defined(FORMAT_AUDIT) 120WFORMAT= 1 121.endif # FORMAT_AUDIT 122.if defined(WFORMAT) 123.if ${WFORMAT} > 0 124#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 125CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 126.if ${WARNS} <= 3 127CWARNFLAGS.clang+= -Wno-format-nonliteral 128.endif # WARNS <= 3 129.if ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no" 130CWARNFLAGS+= -Werror 131.endif # ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no" 132.endif # WFORMAT > 0 133.endif # WFORMAT 134.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE}) 135CWARNFLAGS+= -Wno-format 136.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE} 137 138# GCC 139# We should clean up warnings produced with these flags. 140# They were originally added as a quick hack to enable gcc5/6. 141# The base system requires at least GCC 6.4, but some ports 142# use this file with older compilers. Request an exprun 143# before changing these. 144.if ${COMPILER_TYPE} == "gcc" 145# GCC 5.2.0 146.if ${COMPILER_VERSION} >= 50200 147CWARNFLAGS+= -Wno-error=address \ 148 -Wno-error=array-bounds \ 149 -Wno-error=attributes \ 150 -Wno-error=bool-compare \ 151 -Wno-error=cast-align \ 152 -Wno-error=clobbered \ 153 -Wno-error=deprecated-declarations \ 154 -Wno-error=enum-compare \ 155 -Wno-error=extra \ 156 -Wno-error=logical-not-parentheses \ 157 -Wno-error=strict-aliasing \ 158 -Wno-error=uninitialized \ 159 -Wno-error=unused-but-set-variable \ 160 -Wno-error=unused-function \ 161 -Wno-error=unused-value 162.endif 163 164# GCC 6.1.0 165.if ${COMPILER_VERSION} >= 60100 166CWARNFLAGS+= -Wno-error=empty-body \ 167 -Wno-error=maybe-uninitialized \ 168 -Wno-error=nonnull-compare \ 169 -Wno-error=shift-negative-value \ 170 -Wno-error=tautological-compare \ 171 -Wno-error=unused-const-variable 172.endif 173 174# GCC 7.1.0 175.if ${COMPILER_VERSION} >= 70100 176CWARNFLAGS+= -Wno-error=bool-operation \ 177 -Wno-error=deprecated \ 178 -Wno-error=expansion-to-defined \ 179 -Wno-error=format-overflow \ 180 -Wno-error=format-truncation \ 181 -Wno-error=implicit-fallthrough \ 182 -Wno-error=int-in-bool-context \ 183 -Wno-error=memset-elt-size \ 184 -Wno-error=noexcept-type \ 185 -Wno-error=nonnull \ 186 -Wno-error=pointer-compare \ 187 -Wno-error=stringop-overflow 188.endif 189 190# GCC 8.1.0 191.if ${COMPILER_VERSION} >= 80100 192CWARNFLAGS+= -Wno-error=aggressive-loop-optimizations \ 193 -Wno-error=cast-function-type \ 194 -Wno-error=catch-value \ 195 -Wno-error=multistatement-macros \ 196 -Wno-error=restrict \ 197 -Wno-error=sizeof-pointer-memaccess \ 198 -Wno-error=stringop-truncation 199.endif 200 201# GCC 9.2.0 202.if ${COMPILER_VERSION} >= 90200 203.if ${MACHINE_ARCH} == "i386" 204CWARNFLAGS+= -Wno-error=overflow 205.endif 206.endif 207 208# GCC produces false positives for functions that switch on an 209# enum (GCC bug 87950) 210CWARNFLAGS+= -Wno-return-type 211 212# GCC's own arm_neon.h triggers various warnings 213.if ${MACHINE_CPUARCH} == "aarch64" 214CWARNFLAGS+= -Wno-system-headers 215.endif 216.endif # gcc 217 218# How to handle FreeBSD custom printf format specifiers. 219.if ${COMPILER_TYPE} == "clang" 220FORMAT_EXTENSIONS= -D__printf__=__freebsd_kprintf__ 221.else 222FORMAT_EXTENSIONS= -fformat-extensions 223.endif 224 225.if defined(IGNORE_PRAGMA) 226CWARNFLAGS+= -Wno-unknown-pragmas 227.endif # IGNORE_PRAGMA 228 229# This warning is utter nonsense 230CFLAGS+= -Wno-format-zero-length 231 232.if ${COMPILER_TYPE} == "clang" 233# The headers provided by clang are incompatible with the FreeBSD headers. 234# If the version of clang is not one that has been patched to omit the 235# incompatible headers, we need to compile with -nobuiltininc and add the 236# resource dir to the end of the search paths. This ensures that headers such as 237# immintrin.h are still found but stddef.h, etc. are picked up from FreeBSD. 238# 239# XXX: This is a hack to support complete external installs of clang while 240# we work to synchronize our decleration guards with those in the clang tree. 241.if ${MK_CLANG_BOOTSTRAP:Uno} == "no" && \ 242 ${COMPILER_RESOURCE_DIR} != "unknown" && !defined(BOOTSTRAPPING) 243CFLAGS+=-nobuiltininc -idirafter ${COMPILER_RESOURCE_DIR}/include 244.endif 245.endif 246 247CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3 248.if ${COMPILER_VERSION} < 130000 249CLANG_OPT_SMALL+= -mllvm -simplifycfg-dup-ret 250.endif 251CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false 252CFLAGS.clang+= -Qunused-arguments 253# The libc++ headers use c++11 extensions. These are normally silenced because 254# they are treated as system headers, but we explicitly disable that warning 255# suppression when building the base system to catch bugs in our headers. 256# Eventually we'll want to start building the base system C++ code as C++11, 257# but not yet. 258CXXFLAGS.clang+= -Wno-c++11-extensions 259 260.if ${MK_SSP} != "no" 261# Don't use -Wstack-protector as it breaks world with -Werror. 262SSP_CFLAGS?= -fstack-protector-strong 263CFLAGS+= ${SSP_CFLAGS} 264.endif # SSP 265 266# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is 267# enabled. 268DEBUG_FILES_CFLAGS?= -g -gz=zlib 269 270# Allow user-specified additional warning flags, plus compiler and file 271# specific flag overrides, unless we've overridden this... 272.if ${MK_WARNS} != "no" 273CFLAGS+= ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}} 274CFLAGS+= ${CWARNFLAGS.${.IMPSRC:T}} 275CXXFLAGS+= ${CXXWARNFLAGS:M*} ${CXXWARNFLAGS.${COMPILER_TYPE}} 276CXXFLAGS+= ${CXXWARNFLAGS.${.IMPSRC:T}} 277.endif 278 279CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} 280CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}} 281 282AFLAGS+= ${AFLAGS.${.IMPSRC:T}} 283AFLAGS+= ${AFLAGS.${.TARGET:T}} 284ACFLAGS+= ${ACFLAGS.${.IMPSRC:T}} 285ACFLAGS+= ${ACFLAGS.${.TARGET:T}} 286CFLAGS+= ${CFLAGS.${.IMPSRC:T}} 287CXXFLAGS+= ${CXXFLAGS.${.IMPSRC:T}} 288 289LDFLAGS+= ${LDFLAGS.${LINKER_TYPE}} 290 291# Only allow .TARGET when not using PROGS as it has the same syntax 292# per PROG which is ambiguous with this syntax. This is only needed 293# for PROG_VARS vars. 294# 295# Some directories (currently just clang) also need to disable this since 296# CFLAGS.${COMPILER_TYPE}, CFLAGS.${.IMPSRC:T} and CFLAGS.${.TARGET:T} all live 297# in the same namespace, meaning that, for example, GCC builds of clang pick up 298# CFLAGS.clang via CFLAGS.${.TARGET:T} and thus try to pass Clang-specific 299# flags. Ideally the different sources of CFLAGS would be namespaced to avoid 300# collisions. 301.if !defined(_RECURSING_PROGS) && !defined(NO_TARGET_FLAGS) 302.if ${MK_WARNS} != "no" 303CFLAGS+= ${CWARNFLAGS.${.TARGET:T}} 304.endif 305CFLAGS+= ${CFLAGS.${.TARGET:T}} 306CXXFLAGS+= ${CXXFLAGS.${.TARGET:T}} 307LDFLAGS+= ${LDFLAGS.${.TARGET:T}} 308LDADD+= ${LDADD.${.TARGET:T}} 309LIBADD+= ${LIBADD.${.TARGET:T}} 310.endif 311 312.if defined(SRCTOP) 313# Prevent rebuilding during install to support read-only objdirs. 314.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta) 315CFLAGS+= ERROR-tried-to-rebuild-during-make-install 316.endif 317.endif 318 319# Please keep this if in sync with kern.mk 320.if ${LD} != "ld" && (${CC:[1]:H} != ${LD:[1]:H} || ${LD:[1]:T} != "ld") 321# Add -fuse-ld=${LD} if $LD is in a different directory or not called "ld". 322.if ${COMPILER_TYPE} == "clang" 323# Note: Clang does not like relative paths for ld so we map ld.lld -> lld. 324.if ${COMPILER_VERSION} >= 120000 325LDFLAGS+= --ld-path=${LD:[1]:S/^ld.//1W} 326.else 327LDFLAGS+= -fuse-ld=${LD:[1]:S/^ld.//1W} 328.endif 329.else 330# GCC does not support an absolute path for -fuse-ld so we just print this 331# warning instead and let the user add the required symlinks. 332# However, we can avoid this warning if -B is set appropriately (e.g. for 333# CROSS_TOOLCHAIN=...-gcc). 334.if !(${LD:[1]:T} == "ld" && ${CC:tw:M-B${LD:[1]:H}/}) 335.warning LD (${LD}) is not the default linker for ${CC} but -fuse-ld= is not supported 336.endif 337.endif 338.endif 339 340# Tell bmake not to mistake standard targets for things to be searched for 341# or expect to ever be up-to-date. 342PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \ 343 beforelinking build build-tools buildconfig buildfiles \ 344 buildincludes check checkdpadd clean cleandepend cleandir \ 345 cleanobj configure depend distclean distribute exe \ 346 files html includes install installconfig installdirs \ 347 installfiles installincludes lint obj objlink objs objwarn \ 348 realinstall tags whereobj 349 350# we don't want ${PROG} to be PHONY 351.PHONY: ${PHONY_NOTMAIN:N${PROG:U}} 352.NOTMAIN: ${PHONY_NOTMAIN:Nall} 353 354.if ${MK_STAGING} != "no" 355.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*) && !make(*clean)) 356_SKIP_STAGING?= yes 357.endif 358.if ${_SKIP_STAGING:Uno} == "yes" 359staging stage_libs stage_files stage_as stage_links stage_symlinks: 360.else 361# allow targets like beforeinstall to be leveraged 362DESTDIR= ${STAGE_OBJTOP} 363.export DESTDIR 364 365.if target(beforeinstall) 366.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 367staging: beforeinstall 368.endif 369.endif 370 371# normally only libs and includes are staged 372.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG) 373STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR} 374 375.if !empty(PROG) 376.if defined(PROGNAME) 377STAGE_AS_SETS+= prog 378STAGE_AS_${PROG}= ${PROGNAME} 379stage_as.prog: ${PROG} 380.else 381STAGE_SETS+= prog 382stage_files.prog: ${PROG} 383STAGE_TARGETS+= stage_files 384.endif 385.endif 386.endif 387 388.if !empty(_LIBS) && !defined(INTERNALLIB) 389.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != "" 390STAGE_SETS+= shlib 391STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR} 392STAGE_FILES.shlib+= ${_LIBS:M*.so.*} 393stage_files.shlib: ${_LIBS:M*.so.*} 394.endif 395 396.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld) 397STAGE_AS_SETS+= ldscript 398STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld 399stage_as.ldscript: ${SHLIB_LINK:R}.ld 400STAGE_DIR.ldscript = ${STAGE_LIBDIR} 401STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK} 402NO_SHLIB_LINKS= 403.endif 404 405.if target(stage_files.shlib) 406stage_libs: ${_LIBS} 407.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 408stage_files.shlib: ${SHLIB_NAME}.symbols 409.endif 410.else 411stage_libs: ${_LIBS} 412.endif 413.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 414stage_libs: ${SHLIB_NAME}.symbols 415.endif 416 417.endif 418 419.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes) 420.if !defined(NO_BEFOREBUILD_INCLUDES) 421stage_includes: buildincludes 422beforebuild: stage_includes 423.endif 424.endif 425 426.for t in stage_libs stage_files stage_as 427.if target($t) 428STAGE_TARGETS+= $t 429.endif 430.endfor 431 432.if !empty(STAGE_AS_SETS) 433STAGE_TARGETS+= stage_as 434.endif 435 436.if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 437 438.if !empty(LINKS) 439STAGE_TARGETS+= stage_links 440.if ${MAKE_VERSION} < 20131001 441stage_links.links: ${_LIBS} ${PROG} 442.endif 443STAGE_SETS+= links 444STAGE_LINKS.links= ${LINKS} 445.endif 446 447.if !empty(SYMLINKS) 448STAGE_TARGETS+= stage_symlinks 449STAGE_SETS+= links 450STAGE_SYMLINKS.links= ${SYMLINKS} 451.endif 452 453.endif 454 455.include <meta.stage.mk> 456.endif 457.endif 458 459.if defined(META_TARGETS) 460.for _tgt in ${META_TARGETS} 461.if target(${_tgt}) 462${_tgt}: ${META_DEPS} 463.endif 464.endfor 465.endif 466