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