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 4.2.1 GCC: http://gcc.gnu.org/onlinedocs/gcc-4.2.1/gcc/Warning-Options.html 10# for current GCC: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html 11# for clang: https://clang.llvm.org/docs/DiagnosticsReference.html 12 13.include <bsd.compiler.mk> 14 15# the default is gnu99 for now 16CSTD?= gnu99 17 18.if ${CSTD} == "c89" || ${CSTD} == "c90" 19CFLAGS+= -std=iso9899:1990 20.elif ${CSTD} == "c94" || ${CSTD} == "c95" 21CFLAGS+= -std=iso9899:199409 22.elif ${CSTD} == "c99" 23CFLAGS+= -std=iso9899:1999 24.else # CSTD 25CFLAGS+= -std=${CSTD} 26.endif # CSTD 27 28.if ${COMPILER_FEATURES:Mc++11} 29CXXSTD?= c++11 30.elif ${COMPILER_TYPE} == "gcc" 31# Prior versions of g++ support C++98 with GNU extensions by default. 32CXXSTD?= gnu++98 33.else 34# Assume that the compiler supports at least C++98. 35CXXSTD?= c++98 36.endif 37CXXFLAGS+= -std=${CXXSTD} 38# CXXSTD 39 40# -pedantic is problematic because it also imposes namespace restrictions 41#CFLAGS+= -pedantic 42.if defined(WARNS) 43.if ${WARNS} >= 1 44CWARNFLAGS+= -Wsystem-headers 45.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE}) 46CWARNFLAGS+= -Werror 47.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE} 48.endif # WARNS >= 1 49.if ${WARNS} >= 2 50CWARNFLAGS+= -Wall -Wno-format-y2k 51.endif # WARNS >= 2 52.if ${WARNS} >= 3 53CWARNFLAGS+= -W -Wno-unused-parameter -Wstrict-prototypes\ 54 -Wmissing-prototypes -Wpointer-arith 55.endif # WARNS >= 3 56.if ${WARNS} >= 4 57CWARNFLAGS+= -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\ 58 -Wunused-parameter 59.if !defined(NO_WCAST_ALIGN) && !defined(NO_WCAST_ALIGN.${COMPILER_TYPE}) 60CWARNFLAGS+= -Wcast-align 61.endif # !NO_WCAST_ALIGN !NO_WCAST_ALIGN.${COMPILER_TYPE} 62.endif # WARNS >= 4 63.if ${WARNS} >= 6 64CWARNFLAGS+= -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\ 65 -Wold-style-definition 66.if !defined(NO_WMISSING_VARIABLE_DECLARATIONS) 67CWARNFLAGS.clang+= -Wmissing-variable-declarations 68.endif 69.if !defined(NO_WTHREAD_SAFETY) 70CWARNFLAGS.clang+= -Wthread-safety 71.endif 72.endif # WARNS >= 6 73.if ${WARNS} >= 2 && ${WARNS} <= 4 74# XXX Delete -Wuninitialized by default for now -- the compiler doesn't 75# XXX always get it right. 76CWARNFLAGS+= -Wno-uninitialized 77.endif # WARNS >=2 && WARNS <= 4 78CWARNFLAGS+= -Wno-pointer-sign 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 83.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30400 84CWARNFLAGS.clang+= -Wno-unused-const-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 90.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600 91CWARNFLAGS.clang+= -Wno-unused-local-typedef 92.endif 93.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 40000 94CWARNFLAGS.clang+= -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.endif # WARNS 111 112.if defined(FORMAT_AUDIT) 113WFORMAT= 1 114.endif # FORMAT_AUDIT 115.if defined(WFORMAT) 116.if ${WFORMAT} > 0 117#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 118CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 119.if ${WARNS} <= 3 120CWARNFLAGS.clang+= -Wno-format-nonliteral 121.endif # WARNS <= 3 122.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE}) 123CWARNFLAGS+= -Werror 124.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE} 125.endif # WFORMAT > 0 126.endif # WFORMAT 127.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE}) 128CWARNFLAGS+= -Wno-format 129.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE} 130 131# GCC 5.2.0 132.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200 133CWARNFLAGS+= -Wno-error=address \ 134 -Wno-error=array-bounds \ 135 -Wno-error=attributes \ 136 -Wno-error=bool-compare \ 137 -Wno-error=cast-align \ 138 -Wno-error=clobbered \ 139 -Wno-error=enum-compare \ 140 -Wno-error=extra \ 141 -Wno-error=inline \ 142 -Wno-error=logical-not-parentheses \ 143 -Wno-error=strict-aliasing \ 144 -Wno-error=uninitialized \ 145 -Wno-error=unused-but-set-variable \ 146 -Wno-error=unused-function \ 147 -Wno-error=unused-value 148.endif 149 150# GCC 6.1.0 151.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100 152CWARNFLAGS+= -Wno-error=misleading-indentation \ 153 -Wno-error=nonnull-compare \ 154 -Wno-error=shift-negative-value \ 155 -Wno-error=tautological-compare \ 156 -Wno-error=unused-const-variable 157.endif 158 159# GCC 7.1.0 160.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 70100 161CWARNFLAGS+= -Wno-error=bool-operation \ 162 -Wno-error=deprecated \ 163 -Wno-error=expansion-to-defined \ 164 -Wno-error=format-overflow \ 165 -Wno-error=format-truncation \ 166 -Wno-error=implicit-fallthrough \ 167 -Wno-error=int-in-bool-context \ 168 -Wno-error=memset-elt-size \ 169 -Wno-error=noexcept-type \ 170 -Wno-error=nonnull \ 171 -Wno-error=pointer-compare \ 172 -Wno-error=stringop-overflow 173.endif 174 175# GCC 8.1.0 176.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 80100 177CWARNFLAGS+= -Wno-error=aggressive-loop-optimizations \ 178 -Wno-error=cast-function-type \ 179 -Wno-error=catch-value \ 180 -Wno-error=multistatement-macros \ 181 -Wno-error=restrict \ 182 -Wno-error=sizeof-pointer-memaccess \ 183 -Wno-error=stringop-truncation 184.endif 185 186# How to handle FreeBSD custom printf format specifiers. 187.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600 188FORMAT_EXTENSIONS= -D__printf__=__freebsd_kprintf__ 189.else 190FORMAT_EXTENSIONS= -fformat-extensions 191.endif 192 193.if defined(IGNORE_PRAGMA) 194CWARNFLAGS+= -Wno-unknown-pragmas 195.endif # IGNORE_PRAGMA 196 197# We need this conditional because many places that use it 198# only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}. 199# unconditionally, and can't easily use the CFLAGS.clang= 200# mechanism. 201.if ${COMPILER_TYPE} == "clang" 202CLANG_NO_IAS= -no-integrated-as 203.endif 204CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\ 205 -mllvm -simplifycfg-dup-ret 206.if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700 207CLANG_OPT_SMALL+= -mllvm -enable-gvn=false 208.else 209CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false 210.endif 211CFLAGS.clang+= -Qunused-arguments 212.if ${MACHINE_CPUARCH} == "sparc64" 213# Don't emit .cfi directives, since we must use GNU as on sparc64, for now. 214CFLAGS.clang+= -fno-dwarf2-cfi-asm 215.endif # SPARC64 216# The libc++ headers use c++11 extensions. These are normally silenced because 217# they are treated as system headers, but we explicitly disable that warning 218# suppression when building the base system to catch bugs in our headers. 219# Eventually we'll want to start building the base system C++ code as C++11, 220# but not yet. 221CXXFLAGS.clang+= -Wno-c++11-extensions 222 223.if ${MK_SSP} != "no" && \ 224 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 225.if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \ 226 (${COMPILER_TYPE} == "gcc" && \ 227 (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900)) 228# Don't use -Wstack-protector as it breaks world with -Werror. 229SSP_CFLAGS?= -fstack-protector-strong 230.else 231SSP_CFLAGS?= -fstack-protector 232.endif 233CFLAGS+= ${SSP_CFLAGS} 234.endif # SSP && !ARM && !MIPS 235 236# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is 237# enabled. 238DEBUG_FILES_CFLAGS?= -g 239 240# Allow user-specified additional warning flags, plus compiler and file 241# specific flag overrides, unless we've overridden this... 242.if ${MK_WARNS} != "no" 243CFLAGS+= ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}} 244CFLAGS+= ${CWARNFLAGS.${.IMPSRC:T}} 245.endif 246 247CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} 248CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}} 249 250AFLAGS+= ${AFLAGS.${.IMPSRC:T}} 251ACFLAGS+= ${ACFLAGS.${.IMPSRC:T}} 252CFLAGS+= ${CFLAGS.${.IMPSRC:T}} 253CXXFLAGS+= ${CXXFLAGS.${.IMPSRC:T}} 254 255LDFLAGS+= ${LDFLAGS.${LINKER_TYPE}} 256 257.if defined(SRCTOP) 258# Prevent rebuilding during install to support read-only objdirs. 259.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta) 260CFLAGS+= ERROR-tried-to-rebuild-during-make-install 261.endif 262.endif 263 264# Tell bmake not to mistake standard targets for things to be searched for 265# or expect to ever be up-to-date. 266PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \ 267 beforelinking build build-tools buildconfig buildfiles \ 268 buildincludes check checkdpadd clean cleandepend cleandir \ 269 cleanobj configure depend distclean distribute exe \ 270 files html includes install installconfig installdirs \ 271 installfiles installincludes lint obj objlink objs objwarn \ 272 realinstall tags whereobj 273 274# we don't want ${PROG} to be PHONY 275.PHONY: ${PHONY_NOTMAIN:N${PROG:U}} 276.NOTMAIN: ${PHONY_NOTMAIN:Nall} 277 278.if ${MK_STAGING} != "no" 279.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*)) 280_SKIP_STAGING?= yes 281.endif 282.if ${_SKIP_STAGING:Uno} == "yes" 283staging stage_libs stage_files stage_as stage_links stage_symlinks: 284.else 285# allow targets like beforeinstall to be leveraged 286DESTDIR= ${STAGE_OBJTOP} 287.export DESTDIR 288 289.if target(beforeinstall) 290.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 291staging: beforeinstall 292.endif 293.endif 294 295# normally only libs and includes are staged 296.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG) 297STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR} 298 299.if !empty(PROG) 300.if defined(PROGNAME) 301STAGE_AS_SETS+= prog 302STAGE_AS_${PROG}= ${PROGNAME} 303stage_as.prog: ${PROG} 304.else 305STAGE_SETS+= prog 306stage_files.prog: ${PROG} 307STAGE_TARGETS+= stage_files 308.endif 309.endif 310.endif 311 312.if !empty(_LIBS) && !defined(INTERNALLIB) 313.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != "" 314STAGE_SETS+= shlib 315STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR} 316STAGE_FILES.shlib+= ${_LIBS:M*.so.*} 317stage_files.shlib: ${_LIBS:M*.so.*} 318.endif 319 320.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld) 321STAGE_AS_SETS+= ldscript 322STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld 323stage_as.ldscript: ${SHLIB_LINK:R}.ld 324STAGE_DIR.ldscript = ${STAGE_LIBDIR} 325STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK} 326NO_SHLIB_LINKS= 327.endif 328 329.if target(stage_files.shlib) 330stage_libs: ${_LIBS} 331.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 332stage_files.shlib: ${SHLIB_NAME}.symbols 333.endif 334.else 335stage_libs: ${_LIBS} 336.endif 337.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 338stage_libs: ${SHLIB_NAME}.symbols 339.endif 340 341.endif 342 343.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes) 344.if !defined(NO_BEFOREBUILD_INCLUDES) 345stage_includes: buildincludes 346beforebuild: stage_includes 347.endif 348.endif 349 350.for t in stage_libs stage_files stage_as 351.if target($t) 352STAGE_TARGETS+= $t 353.endif 354.endfor 355 356.if !empty(STAGE_AS_SETS) 357STAGE_TARGETS+= stage_as 358.endif 359 360.if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 361 362.if !empty(LINKS) 363STAGE_TARGETS+= stage_links 364.if ${MAKE_VERSION} < 20131001 365stage_links.links: ${_LIBS} ${PROG} 366.endif 367STAGE_SETS+= links 368STAGE_LINKS.links= ${LINKS} 369.endif 370 371.if !empty(SYMLINKS) 372STAGE_TARGETS+= stage_symlinks 373STAGE_SETS+= links 374STAGE_SYMLINKS.links= ${SYMLINKS} 375.endif 376 377.endif 378 379.include <meta.stage.mk> 380.endif 381.endif 382 383.if defined(META_TARGETS) 384.for _tgt in ${META_TARGETS} 385.if target(${_tgt}) 386${_tgt}: ${META_DEPS} 387.endif 388.endfor 389.endif 390