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 78CWARNFLAGS+= -Wdate-time 79# Clang has more warnings enabled by default, and when using -Wall, so if WARNS 80# is set to low values, these have to be disabled explicitly. 81.if ${WARNS} <= 6 82CWARNFLAGS.clang+= -Wno-empty-body -Wno-string-plus-int 83CWARNFLAGS.clang+= -Wno-unused-const-variable 84.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 130000 85CWARNFLAGS.clang+= -Wno-error=unused-but-set-variable 86.endif 87.endif # WARNS <= 6 88.if ${WARNS} <= 3 89CWARNFLAGS.clang+= -Wno-tautological-compare -Wno-unused-value\ 90 -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion 91CWARNFLAGS.clang+= -Wno-unused-local-typedef 92CWARNFLAGS.clang+= -Wno-address-of-packed-member 93.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 90100 94CWARNFLAGS.gcc+= -Wno-address-of-packed-member 95.endif 96.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 70000 && \ 97 ${MACHINE_CPUARCH} == "arm" && !${MACHINE_ARCH:Marmv[67]*} 98CWARNFLAGS.clang+= -Wno-atomic-alignment 99.endif 100.endif # WARNS <= 3 101.if ${WARNS} <= 2 102CWARNFLAGS.clang+= -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter 103.endif # WARNS <= 2 104.if ${WARNS} <= 1 105CWARNFLAGS.clang+= -Wno-parentheses 106.endif # WARNS <= 1 107.if defined(NO_WARRAY_BOUNDS) 108CWARNFLAGS.clang+= -Wno-array-bounds 109.endif # NO_WARRAY_BOUNDS 110.if defined(NO_WMISLEADING_INDENTATION) && \ 111 ((${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 100000) || \ 112 ${COMPILER_TYPE} == "gcc") 113CWARNFLAGS+= -Wno-misleading-indentation 114.endif # NO_WMISLEADING_INDENTATION 115.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 140000 116NO_WBITWISE_INSTEAD_OF_LOGICAL= -Wno-bitwise-instead-of-logical 117.endif 118.endif # WARNS 119 120.if defined(FORMAT_AUDIT) 121WFORMAT= 1 122.endif # FORMAT_AUDIT 123.if defined(WFORMAT) 124.if ${WFORMAT} > 0 125#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 126CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 127.if ${WARNS} <= 3 128CWARNFLAGS.clang+= -Wno-format-nonliteral 129.endif # WARNS <= 3 130.if ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no" 131CWARNFLAGS+= -Werror 132.endif # ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no" 133.endif # WFORMAT > 0 134.endif # WFORMAT 135.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE}) 136CWARNFLAGS+= -Wno-format 137.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE} 138 139# GCC 140# We should clean up warnings produced with these flags. 141# They were originally added as a quick hack to enable gcc5/6. 142# The base system requires at least GCC 6.4, but some ports 143# use this file with older compilers. Request an exprun 144# before changing these. 145.if ${COMPILER_TYPE} == "gcc" 146# GCC 5.2.0 147.if ${COMPILER_VERSION} >= 50200 148CWARNFLAGS+= -Wno-error=address \ 149 -Wno-error=array-bounds \ 150 -Wno-error=attributes \ 151 -Wno-error=bool-compare \ 152 -Wno-error=cast-align \ 153 -Wno-error=clobbered \ 154 -Wno-error=deprecated-declarations \ 155 -Wno-error=enum-compare \ 156 -Wno-error=extra \ 157 -Wno-error=logical-not-parentheses \ 158 -Wno-error=strict-aliasing \ 159 -Wno-error=uninitialized \ 160 -Wno-error=unused-but-set-variable \ 161 -Wno-error=unused-function \ 162 -Wno-error=unused-value 163.endif 164 165# GCC 6.1.0 166.if ${COMPILER_VERSION} >= 60100 167CWARNFLAGS+= -Wno-error=empty-body \ 168 -Wno-error=maybe-uninitialized \ 169 -Wno-error=nonnull-compare \ 170 -Wno-error=shift-negative-value \ 171 -Wno-error=tautological-compare \ 172 -Wno-error=unused-const-variable 173.endif 174 175# GCC 7.1.0 176.if ${COMPILER_VERSION} >= 70100 177CWARNFLAGS+= -Wno-error=bool-operation \ 178 -Wno-error=deprecated \ 179 -Wno-error=expansion-to-defined \ 180 -Wno-error=format-overflow \ 181 -Wno-error=format-truncation \ 182 -Wno-error=implicit-fallthrough \ 183 -Wno-error=int-in-bool-context \ 184 -Wno-error=memset-elt-size \ 185 -Wno-error=noexcept-type \ 186 -Wno-error=nonnull \ 187 -Wno-error=pointer-compare \ 188 -Wno-error=stringop-overflow 189.endif 190 191# GCC 8.1.0 192.if ${COMPILER_VERSION} >= 80100 193CWARNFLAGS+= -Wno-error=aggressive-loop-optimizations \ 194 -Wno-error=cast-function-type \ 195 -Wno-error=catch-value \ 196 -Wno-error=multistatement-macros \ 197 -Wno-error=restrict \ 198 -Wno-error=sizeof-pointer-memaccess \ 199 -Wno-error=stringop-truncation 200.endif 201 202# GCC 9.2.0 203.if ${COMPILER_VERSION} >= 90200 204.if ${MACHINE_ARCH} == "i386" 205CWARNFLAGS+= -Wno-error=overflow 206.endif 207.endif 208 209# GCC produces false positives for functions that switch on an 210# enum (GCC bug 87950) 211CWARNFLAGS+= -Wno-return-type 212 213# GCC's own arm_neon.h triggers various warnings 214.if ${MACHINE_CPUARCH} == "aarch64" 215CWARNFLAGS+= -Wno-system-headers 216.endif 217.endif # gcc 218 219# How to handle FreeBSD custom printf format specifiers. 220.if ${COMPILER_TYPE} == "clang" 221FORMAT_EXTENSIONS= -D__printf__=__freebsd_kprintf__ 222.else 223FORMAT_EXTENSIONS= -fformat-extensions 224.endif 225 226.if defined(IGNORE_PRAGMA) 227CWARNFLAGS+= -Wno-unknown-pragmas 228.endif # IGNORE_PRAGMA 229 230# This warning is utter nonsense 231CFLAGS+= -Wno-format-zero-length 232 233.if ${COMPILER_TYPE} == "clang" 234# The headers provided by clang are incompatible with the FreeBSD headers. 235# If the version of clang is not one that has been patched to omit the 236# incompatible headers, we need to compile with -nobuiltininc and add the 237# resource dir to the end of the search paths. This ensures that headers such as 238# immintrin.h are still found but stddef.h, etc. are picked up from FreeBSD. 239# 240# XXX: This is a hack to support complete external installs of clang while 241# we work to synchronize our decleration guards with those in the clang tree. 242.if ${MK_CLANG_BOOTSTRAP:Uno} == "no" && \ 243 ${COMPILER_RESOURCE_DIR} != "unknown" && !defined(BOOTSTRAPPING) 244CFLAGS+=-nobuiltininc -idirafter ${COMPILER_RESOURCE_DIR}/include 245.endif 246.endif 247 248CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3 249.if ${COMPILER_VERSION} < 130000 250CLANG_OPT_SMALL+= -mllvm -simplifycfg-dup-ret 251.endif 252CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false 253CFLAGS.clang+= -Qunused-arguments 254# The libc++ headers use c++11 extensions. These are normally silenced because 255# they are treated as system headers, but we explicitly disable that warning 256# suppression when building the base system to catch bugs in our headers. 257# Eventually we'll want to start building the base system C++ code as C++11, 258# but not yet. 259CXXFLAGS.clang+= -Wno-c++11-extensions 260 261.if ${MK_SSP} != "no" 262# Don't use -Wstack-protector as it breaks world with -Werror. 263SSP_CFLAGS?= -fstack-protector-strong 264CFLAGS+= ${SSP_CFLAGS} 265.endif # SSP 266 267# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is 268# enabled. 269DEBUG_FILES_CFLAGS?= -g -gz=zlib 270 271# Allow user-specified additional warning flags, plus compiler and file 272# specific flag overrides, unless we've overridden this... 273.if ${MK_WARNS} != "no" 274CFLAGS+= ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}} 275CFLAGS+= ${CWARNFLAGS.${.IMPSRC:T}} 276CXXFLAGS+= ${CXXWARNFLAGS:M*} ${CXXWARNFLAGS.${COMPILER_TYPE}} 277CXXFLAGS+= ${CXXWARNFLAGS.${.IMPSRC:T}} 278.endif 279 280CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} 281CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}} 282 283AFLAGS+= ${AFLAGS.${.IMPSRC:T}} 284AFLAGS+= ${AFLAGS.${.TARGET:T}} 285ACFLAGS+= ${ACFLAGS.${.IMPSRC:T}} 286ACFLAGS+= ${ACFLAGS.${.TARGET:T}} 287CFLAGS+= ${CFLAGS.${.IMPSRC:T}} 288CXXFLAGS+= ${CXXFLAGS.${.IMPSRC:T}} 289 290LDFLAGS+= ${LDFLAGS.${LINKER_TYPE}} 291 292# Only allow .TARGET when not using PROGS as it has the same syntax 293# per PROG which is ambiguous with this syntax. This is only needed 294# for PROG_VARS vars. 295# 296# Some directories (currently just clang) also need to disable this since 297# CFLAGS.${COMPILER_TYPE}, CFLAGS.${.IMPSRC:T} and CFLAGS.${.TARGET:T} all live 298# in the same namespace, meaning that, for example, GCC builds of clang pick up 299# CFLAGS.clang via CFLAGS.${.TARGET:T} and thus try to pass Clang-specific 300# flags. Ideally the different sources of CFLAGS would be namespaced to avoid 301# collisions. 302.if !defined(_RECURSING_PROGS) && !defined(NO_TARGET_FLAGS) 303.if ${MK_WARNS} != "no" 304CFLAGS+= ${CWARNFLAGS.${.TARGET:T}} 305.endif 306CFLAGS+= ${CFLAGS.${.TARGET:T}} 307CXXFLAGS+= ${CXXFLAGS.${.TARGET:T}} 308LDFLAGS+= ${LDFLAGS.${.TARGET:T}} 309LDADD+= ${LDADD.${.TARGET:T}} 310LIBADD+= ${LIBADD.${.TARGET:T}} 311.endif 312 313.if defined(SRCTOP) 314# Prevent rebuilding during install to support read-only objdirs. 315.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta) 316CFLAGS+= ERROR-tried-to-rebuild-during-make-install 317.endif 318.endif 319 320# Please keep this if in sync with kern.mk 321.if ${LD} != "ld" && (${CC:[1]:H} != ${LD:[1]:H} || ${LD:[1]:T} != "ld") 322# Add -fuse-ld=${LD} if $LD is in a different directory or not called "ld". 323.if ${COMPILER_TYPE} == "clang" 324# Note: Clang does not like relative paths for ld so we map ld.lld -> lld. 325.if ${COMPILER_VERSION} >= 120000 326LDFLAGS+= --ld-path=${LD:[1]:S/^ld.//1W} 327.else 328LDFLAGS+= -fuse-ld=${LD:[1]:S/^ld.//1W} 329.endif 330.else 331# GCC does not support an absolute path for -fuse-ld so we just print this 332# warning instead and let the user add the required symlinks. 333# However, we can avoid this warning if -B is set appropriately (e.g. for 334# CROSS_TOOLCHAIN=...-gcc). 335.if !(${LD:[1]:T} == "ld" && ${CC:tw:M-B${LD:[1]:H}/}) 336.warning LD (${LD}) is not the default linker for ${CC} but -fuse-ld= is not supported 337.endif 338.endif 339.endif 340 341# Tell bmake not to mistake standard targets for things to be searched for 342# or expect to ever be up-to-date. 343PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \ 344 beforelinking build build-tools buildconfig buildfiles \ 345 buildincludes check checkdpadd clean cleandepend cleandir \ 346 cleanobj configure depend distclean distribute exe \ 347 files html includes install installconfig installdirs \ 348 installfiles installincludes lint obj objlink objs objwarn \ 349 realinstall tags whereobj 350 351# we don't want ${PROG} to be PHONY 352.PHONY: ${PHONY_NOTMAIN:N${PROG:U}} 353.NOTMAIN: ${PHONY_NOTMAIN:Nall} 354 355.if ${MK_STAGING} != "no" 356.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*) && !make(*clean)) 357_SKIP_STAGING?= yes 358.endif 359.if ${_SKIP_STAGING:Uno} == "yes" 360staging stage_libs stage_files stage_as stage_links stage_symlinks: 361.else 362# allow targets like beforeinstall to be leveraged 363DESTDIR= ${STAGE_OBJTOP} 364.export DESTDIR 365 366.if target(beforeinstall) 367.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 368staging: beforeinstall 369.endif 370.endif 371 372# normally only libs and includes are staged 373.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG) 374STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR} 375 376.if !empty(PROG) 377.if defined(PROGNAME) 378STAGE_AS_SETS+= prog 379STAGE_AS_${PROG}= ${PROGNAME} 380stage_as.prog: ${PROG} 381.else 382STAGE_SETS+= prog 383stage_files.prog: ${PROG} 384STAGE_TARGETS+= stage_files 385.endif 386.endif 387.endif 388 389.if !empty(_LIBS) && !defined(INTERNALLIB) 390.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != "" 391STAGE_SETS+= shlib 392STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR} 393STAGE_FILES.shlib+= ${_LIBS:M*.so.*} 394stage_files.shlib: ${_LIBS:M*.so.*} 395.endif 396 397.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld) 398STAGE_AS_SETS+= ldscript 399STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld 400stage_as.ldscript: ${SHLIB_LINK:R}.ld 401STAGE_DIR.ldscript = ${STAGE_LIBDIR} 402STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK} 403NO_SHLIB_LINKS= 404.endif 405 406.if target(stage_files.shlib) 407stage_libs: ${_LIBS} 408.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 409stage_files.shlib: ${SHLIB_NAME}.symbols 410.endif 411.else 412stage_libs: ${_LIBS} 413.endif 414.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 415stage_libs: ${SHLIB_NAME}.symbols 416.endif 417 418.endif 419 420.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes) 421.if !defined(NO_BEFOREBUILD_INCLUDES) 422stage_includes: buildincludes 423beforebuild: stage_includes 424.endif 425.endif 426 427.for t in stage_libs stage_files stage_as 428.if target($t) 429STAGE_TARGETS+= $t 430.endif 431.endfor 432 433.if !empty(STAGE_AS_SETS) 434STAGE_TARGETS+= stage_as 435.endif 436 437.if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 438 439.if !empty(LINKS) 440STAGE_TARGETS+= stage_links 441.if ${MAKE_VERSION} < 20131001 442stage_links.links: ${_LIBS} ${PROG} 443.endif 444STAGE_SETS+= links 445STAGE_LINKS.links= ${LINKS} 446.endif 447 448.if !empty(SYMLINKS) 449STAGE_TARGETS+= stage_symlinks 450STAGE_SETS+= links 451STAGE_SYMLINKS.links= ${SYMLINKS} 452.endif 453 454.endif 455 456.include <meta.stage.mk> 457.endif 458.endif 459 460.if defined(META_TARGETS) 461.for _tgt in ${META_TARGETS} 462.if target(${_tgt}) 463${_tgt}: ${META_DEPS} 464.endif 465.endfor 466.endif 467