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# -pedantic is problematic because it also imposes namespace restrictions 32#CFLAGS+= -pedantic 33.if defined(WARNS) 34.if ${WARNS} >= 1 35CWARNFLAGS+= -Wsystem-headers 36.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE}) 37CWARNFLAGS+= -Werror 38.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE} 39.endif # WARNS >= 1 40.if ${WARNS} >= 2 41CWARNFLAGS+= -Wall -Wno-format-y2k 42.endif # WARNS >= 2 43.if ${WARNS} >= 3 44CWARNFLAGS+= -W -Wno-unused-parameter -Wstrict-prototypes\ 45 -Wmissing-prototypes -Wpointer-arith 46.endif # WARNS >= 3 47.if ${WARNS} >= 4 48CWARNFLAGS+= -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\ 49 -Wunused-parameter 50.if !defined(NO_WCAST_ALIGN) && !defined(NO_WCAST_ALIGN.${COMPILER_TYPE}) 51CWARNFLAGS+= -Wcast-align 52.endif # !NO_WCAST_ALIGN !NO_WCAST_ALIGN.${COMPILER_TYPE} 53.endif # WARNS >= 4 54.if ${WARNS} >= 6 55CWARNFLAGS+= -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\ 56 -Wold-style-definition 57.if !defined(NO_WMISSING_VARIABLE_DECLARATIONS) 58CWARNFLAGS.clang+= -Wmissing-variable-declarations 59.endif 60.if !defined(NO_WTHREAD_SAFETY) 61CWARNFLAGS.clang+= -Wthread-safety 62.endif 63.endif # WARNS >= 6 64.if ${WARNS} >= 2 && ${WARNS} <= 4 65# XXX Delete -Wuninitialized by default for now -- the compiler doesn't 66# XXX always get it right. 67CWARNFLAGS+= -Wno-uninitialized 68.endif # WARNS >=2 && WARNS <= 4 69CWARNFLAGS+= -Wno-pointer-sign 70# Clang has more warnings enabled by default, and when using -Wall, so if WARNS 71# is set to low values, these have to be disabled explicitly. 72.if ${WARNS} <= 6 73CWARNFLAGS.clang+= -Wno-empty-body -Wno-string-plus-int 74CWARNFLAGS.clang+= -Wno-unused-const-variable 75.endif # WARNS <= 6 76.if ${WARNS} <= 3 77CWARNFLAGS.clang+= -Wno-tautological-compare -Wno-unused-value\ 78 -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion 79CWARNFLAGS.clang+= -Wno-unused-local-typedef 80CWARNFLAGS.clang+= -Wno-address-of-packed-member 81.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 90100 82CWARNFLAGS.gcc+= -Wno-address-of-packed-member 83.endif 84.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 70000 && \ 85 ${MACHINE_CPUARCH} == "arm" && !${MACHINE_ARCH:Marmv[67]*} 86CWARNFLAGS.clang+= -Wno-atomic-alignment 87.endif 88.endif # WARNS <= 3 89.if ${WARNS} <= 2 90CWARNFLAGS.clang+= -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter 91.endif # WARNS <= 2 92.if ${WARNS} <= 1 93CWARNFLAGS.clang+= -Wno-parentheses 94.endif # WARNS <= 1 95.if defined(NO_WARRAY_BOUNDS) 96CWARNFLAGS.clang+= -Wno-array-bounds 97.endif # NO_WARRAY_BOUNDS 98.if defined(NO_WMISLEADING_INDENTATION) && \ 99 ((${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 100000) || \ 100 ${COMPILER_TYPE} == "gcc") 101CWARNFLAGS+= -Wno-misleading-indentation 102.endif # NO_WMISLEADING_INDENTATION 103.endif # WARNS 104 105.if defined(FORMAT_AUDIT) 106WFORMAT= 1 107.endif # FORMAT_AUDIT 108.if defined(WFORMAT) 109.if ${WFORMAT} > 0 110#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 111CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 112.if ${WARNS} <= 3 113CWARNFLAGS.clang+= -Wno-format-nonliteral 114.endif # WARNS <= 3 115.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE}) 116CWARNFLAGS+= -Werror 117.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE} 118.endif # WFORMAT > 0 119.endif # WFORMAT 120.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE}) 121CWARNFLAGS+= -Wno-format 122.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE} 123 124# GCC 125# We should clean up warnings produced with these flags. 126# They were originally added as a quick hack to enable gcc5/6. 127.if ${COMPILER_TYPE} == "gcc" 128CWARNFLAGS+= -Wno-error=address \ 129 -Wno-error=array-bounds \ 130 -Wno-error=attributes \ 131 -Wno-error=bool-compare \ 132 -Wno-error=cast-align \ 133 -Wno-error=clobbered \ 134 -Wno-error=deprecated-declarations \ 135 -Wno-error=enum-compare \ 136 -Wno-error=extra \ 137 -Wno-error=inline \ 138 -Wno-error=logical-not-parentheses \ 139 -Wno-error=nonnull-compare \ 140 -Wno-error=shift-negative-value \ 141 -Wno-error=strict-aliasing \ 142 -Wno-error=tautological-compare \ 143 -Wno-error=uninitialized \ 144 -Wno-error=unused-but-set-variable \ 145 -Wno-error=unused-const-variable \ 146 -Wno-error=unused-function \ 147 -Wno-error=unused-value 148 149# GCC 7.1.0 150.if ${COMPILER_VERSION} >= 70100 151CWARNFLAGS+= -Wno-error=bool-operation \ 152 -Wno-error=deprecated \ 153 -Wno-error=expansion-to-defined \ 154 -Wno-error=format-overflow \ 155 -Wno-error=format-truncation \ 156 -Wno-error=implicit-fallthrough \ 157 -Wno-error=int-in-bool-context \ 158 -Wno-error=memset-elt-size \ 159 -Wno-error=noexcept-type \ 160 -Wno-error=nonnull \ 161 -Wno-error=pointer-compare \ 162 -Wno-error=stringop-overflow 163.endif 164 165# GCC 8.1.0 166.if ${COMPILER_VERSION} >= 80100 167CWARNFLAGS+= -Wno-error=aggressive-loop-optimizations \ 168 -Wno-error=cast-function-type \ 169 -Wno-error=catch-value \ 170 -Wno-error=multistatement-macros \ 171 -Wno-error=restrict \ 172 -Wno-error=sizeof-pointer-memaccess \ 173 -Wno-error=stringop-truncation 174.endif 175.endif # gcc 176 177# How to handle FreeBSD custom printf format specifiers. 178.if ${COMPILER_TYPE} == "clang" 179FORMAT_EXTENSIONS= -D__printf__=__freebsd_kprintf__ 180.else 181FORMAT_EXTENSIONS= -fformat-extensions 182.endif 183 184.if defined(IGNORE_PRAGMA) 185CWARNFLAGS+= -Wno-unknown-pragmas 186.endif # IGNORE_PRAGMA 187 188# This warning is utter nonsense 189CFLAGS+= -Wno-format-zero-length 190 191.if ${COMPILER_TYPE} == "clang" 192# The headers provided by clang are incompatible with the FreeBSD headers. 193# If the version of clang is not one that has been patched to omit the 194# incompatible headers, we need to compile with -nobuiltininc and add the 195# resource dir to the end of the search paths. This ensures that headers such as 196# immintrin.h are still found but stddef.h, etc. are picked up from FreeBSD. 197# 198# XXX: This is a hack to support complete external installs of clang while 199# we work to synchronize our decleration guards with those in the clang tree. 200.if ${MK_CLANG_BOOTSTRAP:Uno} == "no" && \ 201 ${COMPILER_RESOURCE_DIR} != "unknown" && !defined(BOOTSTRAPPING) 202CFLAGS+=-nobuiltininc -idirafter ${COMPILER_RESOURCE_DIR}/include 203.endif 204.endif 205 206CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\ 207 -mllvm -simplifycfg-dup-ret 208CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false 209CFLAGS.clang+= -Qunused-arguments 210# The libc++ headers use c++11 extensions. These are normally silenced because 211# they are treated as system headers, but we explicitly disable that warning 212# suppression when building the base system to catch bugs in our headers. 213# Eventually we'll want to start building the base system C++ code as C++11, 214# but not yet. 215CXXFLAGS.clang+= -Wno-c++11-extensions 216 217.if ${MK_SSP} != "no" && \ 218 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 219# Don't use -Wstack-protector as it breaks world with -Werror. 220SSP_CFLAGS?= -fstack-protector-strong 221CFLAGS+= ${SSP_CFLAGS} 222.endif # SSP && !ARM && !MIPS 223 224# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is 225# enabled. 226DEBUG_FILES_CFLAGS?= -g 227 228# Allow user-specified additional warning flags, plus compiler and file 229# specific flag overrides, unless we've overridden this... 230.if ${MK_WARNS} != "no" 231CFLAGS+= ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}} 232CFLAGS+= ${CWARNFLAGS.${.IMPSRC:T}} 233CXXFLAGS+= ${CXXWARNFLAGS:M*} ${CXXWARNFLAGS.${COMPILER_TYPE}} 234CXXFLAGS+= ${CXXWARNFLAGS.${.IMPSRC:T}} 235.endif 236 237CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} 238CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}} 239 240AFLAGS+= ${AFLAGS.${.IMPSRC:T}} 241AFLAGS+= ${AFLAGS.${.TARGET:T}} 242ACFLAGS+= ${ACFLAGS.${.IMPSRC:T}} 243ACFLAGS+= ${ACFLAGS.${.TARGET:T}} 244CFLAGS+= ${CFLAGS.${.IMPSRC:T}} 245CXXFLAGS+= ${CXXFLAGS.${.IMPSRC:T}} 246 247LDFLAGS+= ${LDFLAGS.${LINKER_TYPE}} 248 249# Only allow .TARGET when not using PROGS as it has the same syntax 250# per PROG which is ambiguous with this syntax. This is only needed 251# for PROG_VARS vars. 252.if !defined(_RECURSING_PROGS) 253.if ${MK_WARNS} != "no" 254CFLAGS+= ${CWARNFLAGS.${.TARGET:T}} 255.endif 256CFLAGS+= ${CFLAGS.${.TARGET:T}} 257CXXFLAGS+= ${CXXFLAGS.${.TARGET:T}} 258LDFLAGS+= ${LDFLAGS.${.TARGET:T}} 259LDADD+= ${LDADD.${.TARGET:T}} 260LIBADD+= ${LIBADD.${.TARGET:T}} 261.endif 262 263.if defined(SRCTOP) 264# Prevent rebuilding during install to support read-only objdirs. 265.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta) 266CFLAGS+= ERROR-tried-to-rebuild-during-make-install 267.endif 268.endif 269 270# Tell bmake not to mistake standard targets for things to be searched for 271# or expect to ever be up-to-date. 272PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \ 273 beforelinking build build-tools buildconfig buildfiles \ 274 buildincludes check checkdpadd clean cleandepend cleandir \ 275 cleanobj configure depend distclean distribute exe \ 276 files html includes install installconfig installdirs \ 277 installfiles installincludes lint obj objlink objs objwarn \ 278 realinstall tags whereobj 279 280# we don't want ${PROG} to be PHONY 281.PHONY: ${PHONY_NOTMAIN:N${PROG:U}} 282.NOTMAIN: ${PHONY_NOTMAIN:Nall} 283 284.if ${MK_STAGING} != "no" 285.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*) && !make(*clean)) 286_SKIP_STAGING?= yes 287.endif 288.if ${_SKIP_STAGING:Uno} == "yes" 289staging stage_libs stage_files stage_as stage_links stage_symlinks: 290.else 291# allow targets like beforeinstall to be leveraged 292DESTDIR= ${STAGE_OBJTOP} 293.export DESTDIR 294 295.if target(beforeinstall) 296.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 297staging: beforeinstall 298.endif 299.endif 300 301# normally only libs and includes are staged 302.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG) 303STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR} 304 305.if !empty(PROG) 306.if defined(PROGNAME) 307STAGE_AS_SETS+= prog 308STAGE_AS_${PROG}= ${PROGNAME} 309stage_as.prog: ${PROG} 310.else 311STAGE_SETS+= prog 312stage_files.prog: ${PROG} 313STAGE_TARGETS+= stage_files 314.endif 315.endif 316.endif 317 318.if !empty(_LIBS) && !defined(INTERNALLIB) 319.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != "" 320STAGE_SETS+= shlib 321STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR} 322STAGE_FILES.shlib+= ${_LIBS:M*.so.*} 323stage_files.shlib: ${_LIBS:M*.so.*} 324.endif 325 326.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld) 327STAGE_AS_SETS+= ldscript 328STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld 329stage_as.ldscript: ${SHLIB_LINK:R}.ld 330STAGE_DIR.ldscript = ${STAGE_LIBDIR} 331STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK} 332NO_SHLIB_LINKS= 333.endif 334 335.if target(stage_files.shlib) 336stage_libs: ${_LIBS} 337.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 338stage_files.shlib: ${SHLIB_NAME}.symbols 339.endif 340.else 341stage_libs: ${_LIBS} 342.endif 343.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 344stage_libs: ${SHLIB_NAME}.symbols 345.endif 346 347.endif 348 349.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes) 350.if !defined(NO_BEFOREBUILD_INCLUDES) 351stage_includes: buildincludes 352beforebuild: stage_includes 353.endif 354.endif 355 356.for t in stage_libs stage_files stage_as 357.if target($t) 358STAGE_TARGETS+= $t 359.endif 360.endfor 361 362.if !empty(STAGE_AS_SETS) 363STAGE_TARGETS+= stage_as 364.endif 365 366.if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 367 368.if !empty(LINKS) 369STAGE_TARGETS+= stage_links 370.if ${MAKE_VERSION} < 20131001 371stage_links.links: ${_LIBS} ${PROG} 372.endif 373STAGE_SETS+= links 374STAGE_LINKS.links= ${LINKS} 375.endif 376 377.if !empty(SYMLINKS) 378STAGE_TARGETS+= stage_symlinks 379STAGE_SETS+= links 380STAGE_SYMLINKS.links= ${SYMLINKS} 381.endif 382 383.endif 384 385.include <meta.stage.mk> 386.endif 387.endif 388 389.if defined(META_TARGETS) 390.for _tgt in ${META_TARGETS} 391.if target(${_tgt}) 392${_tgt}: ${META_DEPS} 393.endif 394.endfor 395.endif 396