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's own arm_neon.h triggers various warnings 210.if ${MACHINE_CPUARCH} == "aarch64" 211CWARNFLAGS+= -Wno-system-headers 212.endif 213.endif # gcc 214 215# How to handle FreeBSD custom printf format specifiers. 216.if ${COMPILER_TYPE} == "clang" 217FORMAT_EXTENSIONS= -D__printf__=__freebsd_kprintf__ 218.else 219FORMAT_EXTENSIONS= -fformat-extensions 220.endif 221 222.if defined(IGNORE_PRAGMA) 223CWARNFLAGS+= -Wno-unknown-pragmas 224.endif # IGNORE_PRAGMA 225 226# This warning is utter nonsense 227CFLAGS+= -Wno-format-zero-length 228 229.if ${COMPILER_TYPE} == "clang" 230# The headers provided by clang are incompatible with the FreeBSD headers. 231# If the version of clang is not one that has been patched to omit the 232# incompatible headers, we need to compile with -nobuiltininc and add the 233# resource dir to the end of the search paths. This ensures that headers such as 234# immintrin.h are still found but stddef.h, etc. are picked up from FreeBSD. 235# 236# XXX: This is a hack to support complete external installs of clang while 237# we work to synchronize our decleration guards with those in the clang tree. 238.if ${MK_CLANG_BOOTSTRAP:Uno} == "no" && \ 239 ${COMPILER_RESOURCE_DIR} != "unknown" && !defined(BOOTSTRAPPING) 240CFLAGS+=-nobuiltininc -idirafter ${COMPILER_RESOURCE_DIR}/include 241.endif 242.endif 243 244CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3 245.if ${COMPILER_VERSION} < 130000 246CLANG_OPT_SMALL+= -mllvm -simplifycfg-dup-ret 247.endif 248CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false 249CFLAGS.clang+= -Qunused-arguments 250# The libc++ headers use c++11 extensions. These are normally silenced because 251# they are treated as system headers, but we explicitly disable that warning 252# suppression when building the base system to catch bugs in our headers. 253# Eventually we'll want to start building the base system C++ code as C++11, 254# but not yet. 255CXXFLAGS.clang+= -Wno-c++11-extensions 256 257.if ${MK_SSP} != "no" 258# Don't use -Wstack-protector as it breaks world with -Werror. 259SSP_CFLAGS?= -fstack-protector-strong 260CFLAGS+= ${SSP_CFLAGS} 261.endif # SSP 262 263# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is 264# enabled. 265DEBUG_FILES_CFLAGS?= -g -gz=zlib 266 267# Allow user-specified additional warning flags, plus compiler and file 268# specific flag overrides, unless we've overridden this... 269.if ${MK_WARNS} != "no" 270CFLAGS+= ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}} 271CFLAGS+= ${CWARNFLAGS.${.IMPSRC:T}} 272CXXFLAGS+= ${CXXWARNFLAGS:M*} ${CXXWARNFLAGS.${COMPILER_TYPE}} 273CXXFLAGS+= ${CXXWARNFLAGS.${.IMPSRC:T}} 274.endif 275 276CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} 277CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}} 278 279AFLAGS+= ${AFLAGS.${.IMPSRC:T}} 280AFLAGS+= ${AFLAGS.${.TARGET:T}} 281ACFLAGS+= ${ACFLAGS.${.IMPSRC:T}} 282ACFLAGS+= ${ACFLAGS.${.TARGET:T}} 283CFLAGS+= ${CFLAGS.${.IMPSRC:T}} 284CXXFLAGS+= ${CXXFLAGS.${.IMPSRC:T}} 285 286LDFLAGS+= ${LDFLAGS.${LINKER_TYPE}} 287 288# Only allow .TARGET when not using PROGS as it has the same syntax 289# per PROG which is ambiguous with this syntax. This is only needed 290# for PROG_VARS vars. 291# 292# Some directories (currently just clang) also need to disable this since 293# CFLAGS.${COMPILER_TYPE}, CFLAGS.${.IMPSRC:T} and CFLAGS.${.TARGET:T} all live 294# in the same namespace, meaning that, for example, GCC builds of clang pick up 295# CFLAGS.clang via CFLAGS.${.TARGET:T} and thus try to pass Clang-specific 296# flags. Ideally the different sources of CFLAGS would be namespaced to avoid 297# collisions. 298.if !defined(_RECURSING_PROGS) && !defined(NO_TARGET_FLAGS) 299.if ${MK_WARNS} != "no" 300CFLAGS+= ${CWARNFLAGS.${.TARGET:T}} 301.endif 302CFLAGS+= ${CFLAGS.${.TARGET:T}} 303CXXFLAGS+= ${CXXFLAGS.${.TARGET:T}} 304LDFLAGS+= ${LDFLAGS.${.TARGET:T}} 305LDADD+= ${LDADD.${.TARGET:T}} 306LIBADD+= ${LIBADD.${.TARGET:T}} 307.endif 308 309.if defined(SRCTOP) 310# Prevent rebuilding during install to support read-only objdirs. 311.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta) 312CFLAGS+= ERROR-tried-to-rebuild-during-make-install 313.endif 314.endif 315 316# Please keep this if in sync with kern.mk 317.if ${LD} != "ld" && (${CC:[1]:H} != ${LD:[1]:H} || ${LD:[1]:T} != "ld") 318# Add -fuse-ld=${LD} if $LD is in a different directory or not called "ld". 319.if ${COMPILER_TYPE} == "clang" 320# Note: Clang does not like relative paths for ld so we map ld.lld -> lld. 321.if ${COMPILER_VERSION} >= 120000 322LDFLAGS+= --ld-path=${LD:[1]:S/^ld.//1W} 323.else 324LDFLAGS+= -fuse-ld=${LD:[1]:S/^ld.//1W} 325.endif 326.else 327# GCC does not support an absolute path for -fuse-ld so we just print this 328# warning instead and let the user add the required symlinks. 329# However, we can avoid this warning if -B is set appropriately (e.g. for 330# CROSS_TOOLCHAIN=...-gcc). 331.if !(${LD:[1]:T} == "ld" && ${CC:tw:M-B${LD:[1]:H}/}) 332.warning LD (${LD}) is not the default linker for ${CC} but -fuse-ld= is not supported 333.endif 334.endif 335.endif 336 337# Tell bmake not to mistake standard targets for things to be searched for 338# or expect to ever be up-to-date. 339PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \ 340 beforelinking build build-tools buildconfig buildfiles \ 341 buildincludes check checkdpadd clean cleandepend cleandir \ 342 cleanobj configure depend distclean distribute exe \ 343 files html includes install installconfig installdirs \ 344 installfiles installincludes lint obj objlink objs objwarn \ 345 realinstall tags whereobj 346 347# we don't want ${PROG} to be PHONY 348.PHONY: ${PHONY_NOTMAIN:N${PROG:U}} 349.NOTMAIN: ${PHONY_NOTMAIN:Nall} 350 351.if ${MK_STAGING} != "no" 352.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*) && !make(*clean)) 353_SKIP_STAGING?= yes 354.endif 355.if ${_SKIP_STAGING:Uno} == "yes" 356staging stage_libs stage_files stage_as stage_links stage_symlinks: 357.else 358# allow targets like beforeinstall to be leveraged 359DESTDIR= ${STAGE_OBJTOP} 360.export DESTDIR 361 362.if target(beforeinstall) 363.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 364staging: beforeinstall 365.endif 366.endif 367 368# normally only libs and includes are staged 369.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG) 370STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR} 371 372.if !empty(PROG) 373.if defined(PROGNAME) 374STAGE_AS_SETS+= prog 375STAGE_AS_${PROG}= ${PROGNAME} 376stage_as.prog: ${PROG} 377.else 378STAGE_SETS+= prog 379stage_files.prog: ${PROG} 380STAGE_TARGETS+= stage_files 381.endif 382.endif 383.endif 384 385.if !empty(_LIBS) && !defined(INTERNALLIB) 386.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != "" 387STAGE_SETS+= shlib 388STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR} 389STAGE_FILES.shlib+= ${_LIBS:M*.so.*} 390stage_files.shlib: ${_LIBS:M*.so.*} 391.endif 392 393.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld) 394STAGE_AS_SETS+= ldscript 395STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld 396stage_as.ldscript: ${SHLIB_LINK:R}.ld 397STAGE_DIR.ldscript = ${STAGE_LIBDIR} 398STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK} 399NO_SHLIB_LINKS= 400.endif 401 402.if target(stage_files.shlib) 403stage_libs: ${_LIBS} 404.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 405stage_files.shlib: ${SHLIB_NAME}.symbols 406.endif 407.else 408stage_libs: ${_LIBS} 409.endif 410.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 411stage_libs: ${SHLIB_NAME}.symbols 412.endif 413 414.endif 415 416.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes) 417.if !defined(NO_BEFOREBUILD_INCLUDES) 418stage_includes: buildincludes 419beforebuild: stage_includes 420.endif 421.endif 422 423.for t in stage_libs stage_files stage_as 424.if target($t) 425STAGE_TARGETS+= $t 426.endif 427.endfor 428 429.if !empty(STAGE_AS_SETS) 430STAGE_TARGETS+= stage_as 431.endif 432 433.if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 434 435.if !empty(LINKS) 436STAGE_TARGETS+= stage_links 437.if ${MAKE_VERSION} < 20131001 438stage_links.links: ${_LIBS} ${PROG} 439.endif 440STAGE_SETS+= links 441STAGE_LINKS.links= ${LINKS} 442.endif 443 444.if !empty(SYMLINKS) 445STAGE_TARGETS+= stage_symlinks 446STAGE_SETS+= links 447STAGE_SYMLINKS.links= ${SYMLINKS} 448.endif 449 450.endif 451 452.include <meta.stage.mk> 453.endif 454.endif 455 456.if defined(META_TARGETS) 457.for _tgt in ${META_TARGETS} 458.if target(${_tgt}) 459${_tgt}: ${META_DEPS} 460.endif 461.endfor 462.endif 463