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.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 120100 121NO_WUSE_AFTER_FREE= -Wno-use-after-free 122.endif 123.endif # WARNS 124 125.if defined(FORMAT_AUDIT) 126WFORMAT= 1 127.endif # FORMAT_AUDIT 128.if defined(WFORMAT) 129.if ${WFORMAT} > 0 130#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 131CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 132.if ${WARNS} <= 3 133CWARNFLAGS.clang+= -Wno-format-nonliteral 134.endif # WARNS <= 3 135.if ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no" 136CWARNFLAGS+= -Werror 137.endif # ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no" 138.endif # WFORMAT > 0 139.endif # WFORMAT 140.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE}) 141CWARNFLAGS+= -Wno-format 142.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE} 143 144# GCC 145# We should clean up warnings produced with these flags. 146# They were originally added as a quick hack to enable gcc5/6. 147# The base system requires at least GCC 6.4, but some ports 148# use this file with older compilers. Request an exprun 149# before changing these. 150.if ${COMPILER_TYPE} == "gcc" 151# GCC 5.2.0 152.if ${COMPILER_VERSION} >= 50200 153CWARNFLAGS+= -Wno-error=address \ 154 -Wno-error=array-bounds \ 155 -Wno-error=attributes \ 156 -Wno-error=bool-compare \ 157 -Wno-error=cast-align \ 158 -Wno-error=clobbered \ 159 -Wno-error=deprecated-declarations \ 160 -Wno-error=enum-compare \ 161 -Wno-error=extra \ 162 -Wno-error=logical-not-parentheses \ 163 -Wno-error=strict-aliasing \ 164 -Wno-error=uninitialized \ 165 -Wno-error=unused-but-set-variable \ 166 -Wno-error=unused-function \ 167 -Wno-error=unused-value 168.endif 169 170# GCC 6.1.0 171.if ${COMPILER_VERSION} >= 60100 172CWARNFLAGS+= -Wno-error=empty-body \ 173 -Wno-error=maybe-uninitialized \ 174 -Wno-error=nonnull-compare \ 175 -Wno-error=shift-negative-value \ 176 -Wno-error=tautological-compare \ 177 -Wno-error=unused-const-variable 178.endif 179 180# GCC 7.1.0 181.if ${COMPILER_VERSION} >= 70100 182CWARNFLAGS+= -Wno-error=bool-operation \ 183 -Wno-error=deprecated \ 184 -Wno-error=expansion-to-defined \ 185 -Wno-error=format-overflow \ 186 -Wno-error=format-truncation \ 187 -Wno-error=implicit-fallthrough \ 188 -Wno-error=int-in-bool-context \ 189 -Wno-error=memset-elt-size \ 190 -Wno-error=noexcept-type \ 191 -Wno-error=nonnull \ 192 -Wno-error=pointer-compare \ 193 -Wno-error=stringop-overflow 194.endif 195 196# GCC 8.1.0 197.if ${COMPILER_VERSION} >= 80100 198CWARNFLAGS+= -Wno-error=aggressive-loop-optimizations \ 199 -Wno-error=cast-function-type \ 200 -Wno-error=catch-value \ 201 -Wno-error=multistatement-macros \ 202 -Wno-error=restrict \ 203 -Wno-error=sizeof-pointer-memaccess \ 204 -Wno-error=stringop-truncation 205.endif 206 207# GCC 9.2.0 208.if ${COMPILER_VERSION} >= 90200 209.if ${MACHINE_ARCH} == "i386" 210CWARNFLAGS+= -Wno-error=overflow 211.endif 212.endif 213 214# GCC produces false positives for functions that switch on an 215# enum (GCC bug 87950) 216CWARNFLAGS+= -Wno-return-type 217 218# GCC's own arm_neon.h triggers various warnings 219.if ${MACHINE_CPUARCH} == "aarch64" 220CWARNFLAGS+= -Wno-system-headers 221.endif 222.endif # gcc 223 224# How to handle FreeBSD custom printf format specifiers. 225.if ${COMPILER_TYPE} == "clang" || \ 226 (${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 120100) 227FORMAT_EXTENSIONS= -D__printf__=__freebsd_kprintf__ 228.else 229FORMAT_EXTENSIONS= -fformat-extensions 230.endif 231 232.if defined(IGNORE_PRAGMA) 233CWARNFLAGS+= -Wno-unknown-pragmas 234.endif # IGNORE_PRAGMA 235 236# This warning is utter nonsense 237CFLAGS+= -Wno-format-zero-length 238 239.if ${COMPILER_TYPE} == "clang" 240# The headers provided by clang are incompatible with the FreeBSD headers. 241# If the version of clang is not one that has been patched to omit the 242# incompatible headers, we need to compile with -nobuiltininc and add the 243# resource dir to the end of the search paths. This ensures that headers such as 244# immintrin.h are still found but stddef.h, etc. are picked up from FreeBSD. 245# 246# XXX: This is a hack to support complete external installs of clang while 247# we work to synchronize our decleration guards with those in the clang tree. 248.if ${MK_CLANG_BOOTSTRAP:Uno} == "no" && \ 249 ${COMPILER_RESOURCE_DIR} != "unknown" && !defined(BOOTSTRAPPING) 250CFLAGS+=-nobuiltininc -idirafter ${COMPILER_RESOURCE_DIR}/include 251.endif 252.endif 253 254CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3 255.if ${COMPILER_VERSION} < 130000 256CLANG_OPT_SMALL+= -mllvm -simplifycfg-dup-ret 257.endif 258CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false 259CFLAGS.clang+= -Qunused-arguments 260# The libc++ headers use c++11 extensions. These are normally silenced because 261# they are treated as system headers, but we explicitly disable that warning 262# suppression when building the base system to catch bugs in our headers. 263# Eventually we'll want to start building the base system C++ code as C++11, 264# but not yet. 265CXXFLAGS.clang+= -Wno-c++11-extensions 266 267.if ${MK_SSP} != "no" 268# Don't use -Wstack-protector as it breaks world with -Werror. 269SSP_CFLAGS?= -fstack-protector-strong 270CFLAGS+= ${SSP_CFLAGS} 271.endif # SSP 272 273# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is 274# enabled. 275DEBUG_FILES_CFLAGS?= -g -gz=zlib 276 277# Allow user-specified additional warning flags, plus compiler and file 278# specific flag overrides, unless we've overridden this... 279.if ${MK_WARNS} != "no" 280CFLAGS+= ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}} 281CFLAGS+= ${CWARNFLAGS.${.IMPSRC:T}} 282CXXFLAGS+= ${CXXWARNFLAGS:M*} ${CXXWARNFLAGS.${COMPILER_TYPE}} 283CXXFLAGS+= ${CXXWARNFLAGS.${.IMPSRC:T}} 284.endif 285 286CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} 287CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}} 288 289AFLAGS+= ${AFLAGS.${.IMPSRC:T}} 290AFLAGS+= ${AFLAGS.${.TARGET:T}} 291ACFLAGS+= ${ACFLAGS.${.IMPSRC:T}} 292ACFLAGS+= ${ACFLAGS.${.TARGET:T}} 293CFLAGS+= ${CFLAGS.${.IMPSRC:T}} 294CXXFLAGS+= ${CXXFLAGS.${.IMPSRC:T}} 295 296LDFLAGS+= ${LDFLAGS.${LINKER_TYPE}} 297 298# Only allow .TARGET when not using PROGS as it has the same syntax 299# per PROG which is ambiguous with this syntax. This is only needed 300# for PROG_VARS vars. 301# 302# Some directories (currently just clang) also need to disable this since 303# CFLAGS.${COMPILER_TYPE}, CFLAGS.${.IMPSRC:T} and CFLAGS.${.TARGET:T} all live 304# in the same namespace, meaning that, for example, GCC builds of clang pick up 305# CFLAGS.clang via CFLAGS.${.TARGET:T} and thus try to pass Clang-specific 306# flags. Ideally the different sources of CFLAGS would be namespaced to avoid 307# collisions. 308.if !defined(_RECURSING_PROGS) && !defined(NO_TARGET_FLAGS) 309.if ${MK_WARNS} != "no" 310CFLAGS+= ${CWARNFLAGS.${.TARGET:T}} 311.endif 312CFLAGS+= ${CFLAGS.${.TARGET:T}} 313CXXFLAGS+= ${CXXFLAGS.${.TARGET:T}} 314LDFLAGS+= ${LDFLAGS.${.TARGET:T}} 315LDADD+= ${LDADD.${.TARGET:T}} 316LIBADD+= ${LIBADD.${.TARGET:T}} 317.endif 318 319.if defined(SRCTOP) 320# Prevent rebuilding during install to support read-only objdirs. 321.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta) 322CFLAGS+= ERROR-tried-to-rebuild-during-make-install 323.endif 324.endif 325 326# Please keep this if in sync with kern.mk 327.if ${LD} != "ld" && (${CC:[1]:H} != ${LD:[1]:H} || ${LD:[1]:T} != "ld") 328# Add -fuse-ld=${LD} if $LD is in a different directory or not called "ld". 329.if ${COMPILER_TYPE} == "clang" 330# Note: Clang does not like relative paths for ld so we map ld.lld -> lld. 331.if ${COMPILER_VERSION} >= 120000 332LDFLAGS+= --ld-path=${LD:[1]:S/^ld.//1W} 333.else 334LDFLAGS+= -fuse-ld=${LD:[1]:S/^ld.//1W} 335.endif 336.elif ${COMPILER_TYPE} == "gcc" 337# GCC does not support an absolute path for -fuse-ld so we just print this 338# warning instead and let the user add the required symlinks. 339# However, we can avoid this warning if -B is set appropriately (e.g. for 340# CROSS_TOOLCHAIN=...-gcc). 341.if !(${LD:[1]:T} == "ld" && ${CC:tw:M-B${LD:[1]:H}/}) 342.warning LD (${LD}) is not the default linker for ${CC} but -fuse-ld= is not supported 343.endif 344.endif 345.endif 346 347# Tell bmake not to mistake standard targets for things to be searched for 348# or expect to ever be up-to-date. 349PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \ 350 beforelinking build build-tools buildconfig buildfiles \ 351 buildincludes check checkdpadd clean cleandepend cleandir \ 352 cleanobj configure depend distclean distribute exe \ 353 files html includes install installconfig installdirs \ 354 installfiles installincludes lint obj objlink objs objwarn \ 355 realinstall tags whereobj 356 357# we don't want ${PROG} to be PHONY 358.PHONY: ${PHONY_NOTMAIN:N${PROG:U}} 359.NOTMAIN: ${PHONY_NOTMAIN:Nall} 360 361.if ${MK_STAGING} != "no" 362.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*) && !make(*clean)) 363_SKIP_STAGING?= yes 364.endif 365.if ${_SKIP_STAGING:Uno} == "yes" 366staging stage_libs stage_files stage_as stage_links stage_symlinks: 367.else 368# allow targets like beforeinstall to be leveraged 369DESTDIR= ${STAGE_OBJTOP} 370.export DESTDIR 371 372.if target(beforeinstall) 373.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 374staging: beforeinstall 375.endif 376.endif 377 378# normally only libs and includes are staged 379.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG) 380STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR} 381 382.if !empty(PROG) 383.if defined(PROGNAME) 384STAGE_AS_SETS+= prog 385STAGE_AS_${PROG}= ${PROGNAME} 386stage_as.prog: ${PROG} 387.else 388STAGE_SETS+= prog 389stage_files.prog: ${PROG} 390STAGE_TARGETS+= stage_files 391.endif 392.endif 393.endif 394 395.if !empty(_LIBS) && !defined(INTERNALLIB) 396.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != "" 397STAGE_SETS+= shlib 398STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR} 399STAGE_FILES.shlib+= ${_LIBS:M*.so.*} 400stage_files.shlib: ${_LIBS:M*.so.*} 401.endif 402 403.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld) 404STAGE_AS_SETS+= ldscript 405STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld 406stage_as.ldscript: ${SHLIB_LINK:R}.ld 407STAGE_DIR.ldscript = ${STAGE_LIBDIR} 408STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK} 409NO_SHLIB_LINKS= 410.endif 411 412.if target(stage_files.shlib) 413stage_libs: ${_LIBS} 414.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 415stage_files.shlib: ${SHLIB_NAME}.symbols 416.endif 417.else 418stage_libs: ${_LIBS} 419.endif 420.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 421stage_libs: ${SHLIB_NAME}.symbols 422.endif 423 424.endif 425 426.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes) 427.if !defined(NO_BEFOREBUILD_INCLUDES) 428stage_includes: buildincludes 429beforebuild: stage_includes 430.endif 431.endif 432 433.for t in stage_libs stage_files stage_as 434.if target($t) 435STAGE_TARGETS+= $t 436.endif 437.endfor 438 439.if !empty(STAGE_AS_SETS) 440STAGE_TARGETS+= stage_as 441.endif 442 443.if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 444 445.if !empty(LINKS) 446STAGE_TARGETS+= stage_links 447.if ${MAKE_VERSION} < 20131001 448stage_links.links: ${_LIBS} ${PROG} 449.endif 450STAGE_SETS+= links 451STAGE_LINKS.links= ${LINKS} 452.endif 453 454.if !empty(SYMLINKS) 455STAGE_TARGETS+= stage_symlinks 456STAGE_SETS+= links 457STAGE_SYMLINKS.links= ${SYMLINKS} 458.endif 459 460.endif 461 462.include <meta.stage.mk> 463.endif 464.endif 465 466.if defined(META_TARGETS) 467.for _tgt in ${META_TARGETS} 468.if target(${_tgt}) 469${_tgt}: ${META_DEPS} 470.endif 471.endfor 472.endif 473