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 !empty(CXXSTD) 29CXXFLAGS+= -std=${CXXSTD} 30.endif 31 32# 33# Turn off -Werror for gcc 4.2.1. The compiler is on the glide path out of the 34# system, and any warnings specific to it are no longer relevant as there are 35# too many false positives. 36# 37.if ${COMPILER_VERSION} < 50000 38NO_WERROR.gcc= yes 39.endif 40 41# -pedantic is problematic because it also imposes namespace restrictions 42#CFLAGS+= -pedantic 43.if defined(WARNS) 44.if ${WARNS} >= 1 45CWARNFLAGS+= -Wsystem-headers 46.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE}) 47CWARNFLAGS+= -Werror 48.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE} 49.endif # WARNS >= 1 50.if ${WARNS} >= 2 51CWARNFLAGS+= -Wall -Wno-format-y2k 52.endif # WARNS >= 2 53.if ${WARNS} >= 3 54CWARNFLAGS+= -W -Wno-unused-parameter -Wstrict-prototypes\ 55 -Wmissing-prototypes -Wpointer-arith 56.endif # WARNS >= 3 57.if ${WARNS} >= 4 58CWARNFLAGS+= -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\ 59 -Wunused-parameter 60.if !defined(NO_WCAST_ALIGN) && !defined(NO_WCAST_ALIGN.${COMPILER_TYPE}) 61CWARNFLAGS+= -Wcast-align 62.endif # !NO_WCAST_ALIGN !NO_WCAST_ALIGN.${COMPILER_TYPE} 63.endif # WARNS >= 4 64.if ${WARNS} >= 6 65CWARNFLAGS+= -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\ 66 -Wold-style-definition 67.if !defined(NO_WMISSING_VARIABLE_DECLARATIONS) 68CWARNFLAGS.clang+= -Wmissing-variable-declarations 69.endif 70.if !defined(NO_WTHREAD_SAFETY) 71CWARNFLAGS.clang+= -Wthread-safety 72.endif 73.endif # WARNS >= 6 74.if ${WARNS} >= 2 && ${WARNS} <= 4 75# XXX Delete -Wuninitialized by default for now -- the compiler doesn't 76# XXX always get it right. 77CWARNFLAGS+= -Wno-uninitialized 78.endif # WARNS >=2 && WARNS <= 4 79CWARNFLAGS+= -Wno-pointer-sign 80# Clang has more warnings enabled by default, and when using -Wall, so if WARNS 81# is set to low values, these have to be disabled explicitly. 82.if ${WARNS} <= 6 83CWARNFLAGS.clang+= -Wno-empty-body -Wno-string-plus-int 84.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30400 85CWARNFLAGS.clang+= -Wno-unused-const-variable 86.endif 87.endif # WARNS <= 6 88.if ${WARNS} <= 3 89CWARNFLAGS.clang+= -Wno-tautological-compare -Wno-unused-value\ 90 -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion 91.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600 92CWARNFLAGS.clang+= -Wno-unused-local-typedef 93.endif 94.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 40000 95CWARNFLAGS.clang+= -Wno-address-of-packed-member 96.endif 97.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 70000 && \ 98 ${MACHINE_CPUARCH} == "arm" && !${MACHINE_ARCH:Marmv[67]*} 99CWARNFLAGS.clang+= -Wno-atomic-alignment 100.endif 101.endif # WARNS <= 3 102.if ${WARNS} <= 2 103CWARNFLAGS.clang+= -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter 104.endif # WARNS <= 2 105.if ${WARNS} <= 1 106CWARNFLAGS.clang+= -Wno-parentheses 107.endif # WARNS <= 1 108.if defined(NO_WARRAY_BOUNDS) 109CWARNFLAGS.clang+= -Wno-array-bounds 110.endif # NO_WARRAY_BOUNDS 111.if defined(NO_WMISLEADING_INDENTATION) && \ 112 ((${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 100000) || \ 113 (${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100)) 114CWARNFLAGS+= -Wno-misleading-indentation 115.endif # NO_WMISLEADING_INDENTATION 116.endif # WARNS 117 118.if defined(FORMAT_AUDIT) 119WFORMAT= 1 120.endif # FORMAT_AUDIT 121.if defined(WFORMAT) 122.if ${WFORMAT} > 0 123#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 124CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 125.if ${WARNS} <= 3 126CWARNFLAGS.clang+= -Wno-format-nonliteral 127.endif # WARNS <= 3 128.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE}) 129CWARNFLAGS+= -Werror 130.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE} 131.endif # WFORMAT > 0 132.endif # WFORMAT 133.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE}) 134CWARNFLAGS+= -Wno-format 135.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE} 136 137# GCC 5.2.0 138.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200 139CWARNFLAGS+= -Wno-error=address \ 140 -Wno-error=array-bounds \ 141 -Wno-error=attributes \ 142 -Wno-error=bool-compare \ 143 -Wno-error=cast-align \ 144 -Wno-error=clobbered \ 145 -Wno-error=deprecated-declarations \ 146 -Wno-error=enum-compare \ 147 -Wno-error=extra \ 148 -Wno-error=inline \ 149 -Wno-error=logical-not-parentheses \ 150 -Wno-error=strict-aliasing \ 151 -Wno-error=uninitialized \ 152 -Wno-error=unused-but-set-variable \ 153 -Wno-error=unused-function \ 154 -Wno-error=unused-value 155.endif 156 157# GCC 6.1.0 158.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100 159CWARNFLAGS+= -Wno-error=empty-body \ 160 -Wno-error=nonnull-compare \ 161 -Wno-error=shift-negative-value \ 162 -Wno-error=tautological-compare \ 163 -Wno-error=unused-const-variable 164.endif 165 166# GCC 7.1.0 167.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 70100 168CWARNFLAGS+= -Wno-error=bool-operation \ 169 -Wno-error=deprecated \ 170 -Wno-error=expansion-to-defined \ 171 -Wno-error=format-overflow \ 172 -Wno-error=format-truncation \ 173 -Wno-error=implicit-fallthrough \ 174 -Wno-error=int-in-bool-context \ 175 -Wno-error=memset-elt-size \ 176 -Wno-error=noexcept-type \ 177 -Wno-error=nonnull \ 178 -Wno-error=pointer-compare \ 179 -Wno-error=stringop-overflow 180.endif 181 182# GCC 8.1.0 183.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 80100 184CWARNFLAGS+= -Wno-error=aggressive-loop-optimizations \ 185 -Wno-error=cast-function-type \ 186 -Wno-error=catch-value \ 187 -Wno-error=multistatement-macros \ 188 -Wno-error=restrict \ 189 -Wno-error=sizeof-pointer-memaccess \ 190 -Wno-error=stringop-truncation 191.endif 192 193# How to handle FreeBSD custom printf format specifiers. 194.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600 195FORMAT_EXTENSIONS= -D__printf__=__freebsd_kprintf__ 196.else 197FORMAT_EXTENSIONS= -fformat-extensions 198.endif 199 200.if defined(IGNORE_PRAGMA) 201CWARNFLAGS+= -Wno-unknown-pragmas 202.endif # IGNORE_PRAGMA 203 204# This warning is utter nonsense 205CFLAGS+= -Wno-format-zero-length 206 207# We need this conditional because many places that use it 208# only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}. 209# unconditionally, and can't easily use the CFLAGS.clang= 210# mechanism. 211.if ${COMPILER_TYPE} == "clang" 212CLANG_NO_IAS= -no-integrated-as 213.endif 214CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\ 215 -mllvm -simplifycfg-dup-ret 216.if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700 217CLANG_OPT_SMALL+= -mllvm -enable-gvn=false 218.else 219CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false 220.endif 221CFLAGS.clang+= -Qunused-arguments 222.if ${MACHINE_CPUARCH} == "sparc64" 223# Don't emit .cfi directives, since we must use GNU as on sparc64, for now. 224CFLAGS.clang+= -fno-dwarf2-cfi-asm 225.endif # SPARC64 226# The libc++ headers use c++11 extensions. These are normally silenced because 227# they are treated as system headers, but we explicitly disable that warning 228# suppression when building the base system to catch bugs in our headers. 229# Eventually we'll want to start building the base system C++ code as C++11, 230# but not yet. 231CXXFLAGS.clang+= -Wno-c++11-extensions 232 233.if ${MK_SSP} != "no" && \ 234 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 235.if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \ 236 (${COMPILER_TYPE} == "gcc" && \ 237 (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900)) 238# Don't use -Wstack-protector as it breaks world with -Werror. 239SSP_CFLAGS?= -fstack-protector-strong 240.else 241SSP_CFLAGS?= -fstack-protector 242.endif 243CFLAGS+= ${SSP_CFLAGS} 244.endif # SSP && !ARM && !MIPS 245 246# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is 247# enabled. 248DEBUG_FILES_CFLAGS?= -g 249 250# Allow user-specified additional warning flags, plus compiler and file 251# specific flag overrides, unless we've overridden this... 252.if ${MK_WARNS} != "no" 253CFLAGS+= ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}} 254CFLAGS+= ${CWARNFLAGS.${.IMPSRC:T}} 255CXXFLAGS+= ${CXXWARNFLAGS:M*} ${CXXWARNFLAGS.${COMPILER_TYPE}} 256CXXFLAGS+= ${CXXWARNFLAGS.${.IMPSRC:T}} 257.endif 258 259CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} 260CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}} 261 262AFLAGS+= ${AFLAGS.${.IMPSRC:T}} 263ACFLAGS+= ${ACFLAGS.${.IMPSRC:T}} 264CFLAGS+= ${CFLAGS.${.IMPSRC:T}} 265CXXFLAGS+= ${CXXFLAGS.${.IMPSRC:T}} 266 267LDFLAGS+= ${LDFLAGS.${LINKER_TYPE}} 268 269.if defined(SRCTOP) 270# Prevent rebuilding during install to support read-only objdirs. 271.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta) 272CFLAGS+= ERROR-tried-to-rebuild-during-make-install 273.endif 274.endif 275 276# Tell bmake not to mistake standard targets for things to be searched for 277# or expect to ever be up-to-date. 278PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \ 279 beforelinking build build-tools buildconfig buildfiles \ 280 buildincludes check checkdpadd clean cleandepend cleandir \ 281 cleanobj configure depend distclean distribute exe \ 282 files html includes install installconfig installdirs \ 283 installfiles installincludes lint obj objlink objs objwarn \ 284 realinstall tags whereobj 285 286# we don't want ${PROG} to be PHONY 287.PHONY: ${PHONY_NOTMAIN:N${PROG:U}} 288.NOTMAIN: ${PHONY_NOTMAIN:Nall} 289 290.if ${MK_STAGING} != "no" 291.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*) && !make(*clean)) 292_SKIP_STAGING?= yes 293.endif 294.if ${_SKIP_STAGING:Uno} == "yes" 295staging stage_libs stage_files stage_as stage_links stage_symlinks: 296.else 297# allow targets like beforeinstall to be leveraged 298DESTDIR= ${STAGE_OBJTOP} 299.export DESTDIR 300 301.if target(beforeinstall) 302.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 303staging: beforeinstall 304.endif 305.endif 306 307# normally only libs and includes are staged 308.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG) 309STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR} 310 311.if !empty(PROG) 312.if defined(PROGNAME) 313STAGE_AS_SETS+= prog 314STAGE_AS_${PROG}= ${PROGNAME} 315stage_as.prog: ${PROG} 316.else 317STAGE_SETS+= prog 318stage_files.prog: ${PROG} 319STAGE_TARGETS+= stage_files 320.endif 321.endif 322.endif 323 324.if !empty(_LIBS) && !defined(INTERNALLIB) 325.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != "" 326STAGE_SETS+= shlib 327STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR} 328STAGE_FILES.shlib+= ${_LIBS:M*.so.*} 329stage_files.shlib: ${_LIBS:M*.so.*} 330.endif 331 332.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld) 333STAGE_AS_SETS+= ldscript 334STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld 335stage_as.ldscript: ${SHLIB_LINK:R}.ld 336STAGE_DIR.ldscript = ${STAGE_LIBDIR} 337STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK} 338NO_SHLIB_LINKS= 339.endif 340 341.if target(stage_files.shlib) 342stage_libs: ${_LIBS} 343.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 344stage_files.shlib: ${SHLIB_NAME}.symbols 345.endif 346.else 347stage_libs: ${_LIBS} 348.endif 349.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 350stage_libs: ${SHLIB_NAME}.symbols 351.endif 352 353.endif 354 355.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes) 356.if !defined(NO_BEFOREBUILD_INCLUDES) 357stage_includes: buildincludes 358beforebuild: stage_includes 359.endif 360.endif 361 362.for t in stage_libs stage_files stage_as 363.if target($t) 364STAGE_TARGETS+= $t 365.endif 366.endfor 367 368.if !empty(STAGE_AS_SETS) 369STAGE_TARGETS+= stage_as 370.endif 371 372.if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 373 374.if !empty(LINKS) 375STAGE_TARGETS+= stage_links 376.if ${MAKE_VERSION} < 20131001 377stage_links.links: ${_LIBS} ${PROG} 378.endif 379STAGE_SETS+= links 380STAGE_LINKS.links= ${LINKS} 381.endif 382 383.if !empty(SYMLINKS) 384STAGE_TARGETS+= stage_symlinks 385STAGE_SETS+= links 386STAGE_SYMLINKS.links= ${SYMLINKS} 387.endif 388 389.endif 390 391.include <meta.stage.mk> 392.endif 393.endif 394 395.if defined(META_TARGETS) 396.for _tgt in ${META_TARGETS} 397.if target(${_tgt}) 398${_tgt}: ${META_DEPS} 399.endif 400.endfor 401.endif 402