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.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 110100 118NO_WARRAY_PARAMETER= -Wno-array-parameter 119.endif 120.endif # WARNS 121 122.if defined(FORMAT_AUDIT) 123WFORMAT= 1 124.endif # FORMAT_AUDIT 125.if defined(WFORMAT) 126.if ${WFORMAT} > 0 127#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 128CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 129.if ${WARNS} <= 3 130CWARNFLAGS.clang+= -Wno-format-nonliteral 131.endif # WARNS <= 3 132.if ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no" 133CWARNFLAGS+= -Werror 134.endif # ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no" 135.endif # WFORMAT > 0 136.endif # WFORMAT 137.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE}) 138CWARNFLAGS+= -Wno-format 139.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE} 140 141# GCC 142# We should clean up warnings produced with these flags. 143# They were originally added as a quick hack to enable gcc5/6. 144# The base system requires at least GCC 6.4, but some ports 145# use this file with older compilers. Request an exprun 146# before changing these. 147.if ${COMPILER_TYPE} == "gcc" 148# GCC 5.2.0 149.if ${COMPILER_VERSION} >= 50200 150CWARNFLAGS+= -Wno-error=address \ 151 -Wno-error=array-bounds \ 152 -Wno-error=attributes \ 153 -Wno-error=bool-compare \ 154 -Wno-error=cast-align \ 155 -Wno-error=clobbered \ 156 -Wno-error=deprecated-declarations \ 157 -Wno-error=enum-compare \ 158 -Wno-error=extra \ 159 -Wno-error=logical-not-parentheses \ 160 -Wno-error=strict-aliasing \ 161 -Wno-error=uninitialized \ 162 -Wno-error=unused-but-set-variable \ 163 -Wno-error=unused-function \ 164 -Wno-error=unused-value 165.endif 166 167# GCC 6.1.0 168.if ${COMPILER_VERSION} >= 60100 169CWARNFLAGS+= -Wno-error=empty-body \ 170 -Wno-error=maybe-uninitialized \ 171 -Wno-error=nonnull-compare \ 172 -Wno-error=shift-negative-value \ 173 -Wno-error=tautological-compare \ 174 -Wno-error=unused-const-variable 175.endif 176 177# GCC 7.1.0 178.if ${COMPILER_VERSION} >= 70100 179CWARNFLAGS+= -Wno-error=bool-operation \ 180 -Wno-error=deprecated \ 181 -Wno-error=expansion-to-defined \ 182 -Wno-error=format-overflow \ 183 -Wno-error=format-truncation \ 184 -Wno-error=implicit-fallthrough \ 185 -Wno-error=int-in-bool-context \ 186 -Wno-error=memset-elt-size \ 187 -Wno-error=noexcept-type \ 188 -Wno-error=nonnull \ 189 -Wno-error=pointer-compare \ 190 -Wno-error=stringop-overflow 191.endif 192 193# GCC 8.1.0 194.if ${COMPILER_VERSION} >= 80100 195CWARNFLAGS+= -Wno-error=aggressive-loop-optimizations \ 196 -Wno-error=cast-function-type \ 197 -Wno-error=catch-value \ 198 -Wno-error=multistatement-macros \ 199 -Wno-error=restrict \ 200 -Wno-error=sizeof-pointer-memaccess \ 201 -Wno-error=stringop-truncation 202.endif 203 204# GCC 9.2.0 205.if ${COMPILER_VERSION} >= 90200 206.if ${MACHINE_ARCH} == "i386" 207CWARNFLAGS+= -Wno-error=overflow 208.endif 209.endif 210 211# GCC produces false positives for functions that switch on an 212# enum (GCC bug 87950) 213CWARNFLAGS+= -Wno-return-type 214 215# GCC's own arm_neon.h triggers various warnings 216.if ${MACHINE_CPUARCH} == "aarch64" 217CWARNFLAGS+= -Wno-system-headers 218.endif 219.endif # gcc 220 221# How to handle FreeBSD custom printf format specifiers. 222.if ${COMPILER_TYPE} == "clang" 223FORMAT_EXTENSIONS= -D__printf__=__freebsd_kprintf__ 224.else 225FORMAT_EXTENSIONS= -fformat-extensions 226.endif 227 228.if defined(IGNORE_PRAGMA) 229CWARNFLAGS+= -Wno-unknown-pragmas 230.endif # IGNORE_PRAGMA 231 232# This warning is utter nonsense 233CFLAGS+= -Wno-format-zero-length 234 235.if ${COMPILER_TYPE} == "clang" 236# The headers provided by clang are incompatible with the FreeBSD headers. 237# If the version of clang is not one that has been patched to omit the 238# incompatible headers, we need to compile with -nobuiltininc and add the 239# resource dir to the end of the search paths. This ensures that headers such as 240# immintrin.h are still found but stddef.h, etc. are picked up from FreeBSD. 241# 242# XXX: This is a hack to support complete external installs of clang while 243# we work to synchronize our decleration guards with those in the clang tree. 244.if ${MK_CLANG_BOOTSTRAP:Uno} == "no" && \ 245 ${COMPILER_RESOURCE_DIR} != "unknown" && !defined(BOOTSTRAPPING) 246CFLAGS+=-nobuiltininc -idirafter ${COMPILER_RESOURCE_DIR}/include 247.endif 248.endif 249 250CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3 251.if ${COMPILER_VERSION} < 130000 252CLANG_OPT_SMALL+= -mllvm -simplifycfg-dup-ret 253.endif 254CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false 255CFLAGS.clang+= -Qunused-arguments 256# The libc++ headers use c++11 extensions. These are normally silenced because 257# they are treated as system headers, but we explicitly disable that warning 258# suppression when building the base system to catch bugs in our headers. 259# Eventually we'll want to start building the base system C++ code as C++11, 260# but not yet. 261CXXFLAGS.clang+= -Wno-c++11-extensions 262 263.if ${MK_SSP} != "no" 264# Don't use -Wstack-protector as it breaks world with -Werror. 265SSP_CFLAGS?= -fstack-protector-strong 266CFLAGS+= ${SSP_CFLAGS} 267.endif # SSP 268 269# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is 270# enabled. 271DEBUG_FILES_CFLAGS?= -g -gz=zlib 272 273# Allow user-specified additional warning flags, plus compiler and file 274# specific flag overrides, unless we've overridden this... 275.if ${MK_WARNS} != "no" 276CFLAGS+= ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}} 277CFLAGS+= ${CWARNFLAGS.${.IMPSRC:T}} 278CXXFLAGS+= ${CXXWARNFLAGS:M*} ${CXXWARNFLAGS.${COMPILER_TYPE}} 279CXXFLAGS+= ${CXXWARNFLAGS.${.IMPSRC:T}} 280.endif 281 282CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} 283CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}} 284 285AFLAGS+= ${AFLAGS.${.IMPSRC:T}} 286AFLAGS+= ${AFLAGS.${.TARGET:T}} 287ACFLAGS+= ${ACFLAGS.${.IMPSRC:T}} 288ACFLAGS+= ${ACFLAGS.${.TARGET:T}} 289CFLAGS+= ${CFLAGS.${.IMPSRC:T}} 290CXXFLAGS+= ${CXXFLAGS.${.IMPSRC:T}} 291 292LDFLAGS+= ${LDFLAGS.${LINKER_TYPE}} 293 294# Only allow .TARGET when not using PROGS as it has the same syntax 295# per PROG which is ambiguous with this syntax. This is only needed 296# for PROG_VARS vars. 297# 298# Some directories (currently just clang) also need to disable this since 299# CFLAGS.${COMPILER_TYPE}, CFLAGS.${.IMPSRC:T} and CFLAGS.${.TARGET:T} all live 300# in the same namespace, meaning that, for example, GCC builds of clang pick up 301# CFLAGS.clang via CFLAGS.${.TARGET:T} and thus try to pass Clang-specific 302# flags. Ideally the different sources of CFLAGS would be namespaced to avoid 303# collisions. 304.if !defined(_RECURSING_PROGS) && !defined(NO_TARGET_FLAGS) 305.if ${MK_WARNS} != "no" 306CFLAGS+= ${CWARNFLAGS.${.TARGET:T}} 307.endif 308CFLAGS+= ${CFLAGS.${.TARGET:T}} 309CXXFLAGS+= ${CXXFLAGS.${.TARGET:T}} 310LDFLAGS+= ${LDFLAGS.${.TARGET:T}} 311LDADD+= ${LDADD.${.TARGET:T}} 312LIBADD+= ${LIBADD.${.TARGET:T}} 313.endif 314 315.if defined(SRCTOP) 316# Prevent rebuilding during install to support read-only objdirs. 317.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta) 318CFLAGS+= ERROR-tried-to-rebuild-during-make-install 319.endif 320.endif 321 322# Please keep this if in sync with kern.mk 323.if ${LD} != "ld" && (${CC:[1]:H} != ${LD:[1]:H} || ${LD:[1]:T} != "ld") 324# Add -fuse-ld=${LD} if $LD is in a different directory or not called "ld". 325.if ${COMPILER_TYPE} == "clang" 326# Note: Clang does not like relative paths for ld so we map ld.lld -> lld. 327.if ${COMPILER_VERSION} >= 120000 328LDFLAGS+= --ld-path=${LD:[1]:S/^ld.//1W} 329.else 330LDFLAGS+= -fuse-ld=${LD:[1]:S/^ld.//1W} 331.endif 332.elif ${COMPILER_TYPE} == "gcc" 333# GCC does not support an absolute path for -fuse-ld so we just print this 334# warning instead and let the user add the required symlinks. 335# However, we can avoid this warning if -B is set appropriately (e.g. for 336# CROSS_TOOLCHAIN=...-gcc). 337.if !(${LD:[1]:T} == "ld" && ${CC:tw:M-B${LD:[1]:H}/}) 338.warning LD (${LD}) is not the default linker for ${CC} but -fuse-ld= is not supported 339.endif 340.endif 341.endif 342 343# Tell bmake not to mistake standard targets for things to be searched for 344# or expect to ever be up-to-date. 345PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \ 346 beforelinking build build-tools buildconfig buildfiles \ 347 buildincludes check checkdpadd clean cleandepend cleandir \ 348 cleanobj configure depend distclean distribute exe \ 349 files html includes install installconfig installdirs \ 350 installfiles installincludes lint obj objlink objs objwarn \ 351 realinstall tags whereobj 352 353# we don't want ${PROG} to be PHONY 354.PHONY: ${PHONY_NOTMAIN:N${PROG:U}} 355.NOTMAIN: ${PHONY_NOTMAIN:Nall} 356 357.if ${MK_STAGING} != "no" 358.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*) && !make(*clean)) 359_SKIP_STAGING?= yes 360.endif 361.if ${_SKIP_STAGING:Uno} == "yes" 362staging stage_libs stage_files stage_as stage_links stage_symlinks: 363.else 364# allow targets like beforeinstall to be leveraged 365DESTDIR= ${STAGE_OBJTOP} 366.export DESTDIR 367 368.if target(beforeinstall) 369.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 370staging: beforeinstall 371.endif 372.endif 373 374# normally only libs and includes are staged 375.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG) 376STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR} 377 378.if !empty(PROG) 379.if defined(PROGNAME) 380STAGE_AS_SETS+= prog 381STAGE_AS_${PROG}= ${PROGNAME} 382stage_as.prog: ${PROG} 383.else 384STAGE_SETS+= prog 385stage_files.prog: ${PROG} 386STAGE_TARGETS+= stage_files 387.endif 388.endif 389.endif 390 391.if !empty(_LIBS) && !defined(INTERNALLIB) 392.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != "" 393STAGE_SETS+= shlib 394STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR} 395STAGE_FILES.shlib+= ${_LIBS:M*.so.*} 396stage_files.shlib: ${_LIBS:M*.so.*} 397.endif 398 399.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld) 400STAGE_AS_SETS+= ldscript 401STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld 402stage_as.ldscript: ${SHLIB_LINK:R}.ld 403STAGE_DIR.ldscript = ${STAGE_LIBDIR} 404STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK} 405NO_SHLIB_LINKS= 406.endif 407 408.if target(stage_files.shlib) 409stage_libs: ${_LIBS} 410.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 411stage_files.shlib: ${SHLIB_NAME}.symbols 412.endif 413.else 414stage_libs: ${_LIBS} 415.endif 416.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 417stage_libs: ${SHLIB_NAME}.symbols 418.endif 419 420.endif 421 422.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes) 423.if !defined(NO_BEFOREBUILD_INCLUDES) 424stage_includes: buildincludes 425beforebuild: stage_includes 426.endif 427.endif 428 429.for t in stage_libs stage_files stage_as 430.if target($t) 431STAGE_TARGETS+= $t 432.endif 433.endfor 434 435.if !empty(STAGE_AS_SETS) 436STAGE_TARGETS+= stage_as 437.endif 438 439.if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 440 441.if !empty(LINKS) 442STAGE_TARGETS+= stage_links 443.if ${MAKE_VERSION} < 20131001 444stage_links.links: ${_LIBS} ${PROG} 445.endif 446STAGE_SETS+= links 447STAGE_LINKS.links= ${LINKS} 448.endif 449 450.if !empty(SYMLINKS) 451STAGE_TARGETS+= stage_symlinks 452STAGE_SETS+= links 453STAGE_SYMLINKS.links= ${SYMLINKS} 454.endif 455 456.endif 457 458.include <meta.stage.mk> 459.endif 460.endif 461 462.if defined(META_TARGETS) 463.for _tgt in ${META_TARGETS} 464.if target(${_tgt}) 465${_tgt}: ${META_DEPS} 466.endif 467.endfor 468.endif 469