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# -pedantic is problematic because it also imposes namespace restrictions 28#CFLAGS+= -pedantic 29.if defined(WARNS) 30.if ${WARNS} >= 1 31CWARNFLAGS+= -Wsystem-headers 32.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE}) 33CWARNFLAGS+= -Werror 34.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE} 35.endif # WARNS >= 1 36.if ${WARNS} >= 2 37CWARNFLAGS+= -Wall -Wno-format-y2k 38.endif # WARNS >= 2 39.if ${WARNS} >= 3 40CWARNFLAGS+= -W -Wno-unused-parameter -Wstrict-prototypes\ 41 -Wmissing-prototypes -Wpointer-arith 42.endif # WARNS >= 3 43.if ${WARNS} >= 4 44CWARNFLAGS+= -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\ 45 -Wunused-parameter 46.if !defined(NO_WCAST_ALIGN) && !defined(NO_WCAST_ALIGN.${COMPILER_TYPE}) 47CWARNFLAGS+= -Wcast-align 48.endif # !NO_WCAST_ALIGN !NO_WCAST_ALIGN.${COMPILER_TYPE} 49.endif # WARNS >= 4 50.if ${WARNS} >= 6 51CWARNFLAGS+= -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\ 52 -Wold-style-definition 53.if !defined(NO_WMISSING_VARIABLE_DECLARATIONS) 54CWARNFLAGS.clang+= -Wmissing-variable-declarations 55.endif 56.if !defined(NO_WTHREAD_SAFETY) 57CWARNFLAGS.clang+= -Wthread-safety 58.endif 59.endif # WARNS >= 6 60.if ${WARNS} >= 2 && ${WARNS} <= 4 61# XXX Delete -Wuninitialized by default for now -- the compiler doesn't 62# XXX always get it right. 63CWARNFLAGS+= -Wno-uninitialized 64.endif # WARNS >=2 && WARNS <= 4 65CWARNFLAGS+= -Wno-pointer-sign 66# Clang has more warnings enabled by default, and when using -Wall, so if WARNS 67# is set to low values, these have to be disabled explicitly. 68.if ${WARNS} <= 6 69CWARNFLAGS.clang+= -Wno-empty-body -Wno-string-plus-int 70.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30400 71CWARNFLAGS.clang+= -Wno-unused-const-variable 72.endif 73.endif # WARNS <= 6 74.if ${WARNS} <= 3 75CWARNFLAGS.clang+= -Wno-tautological-compare -Wno-unused-value\ 76 -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion 77.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600 78CWARNFLAGS.clang+= -Wno-unused-local-typedef 79.endif 80.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 40000 81CWARNFLAGS.clang+= -Wno-address-of-packed-member 82.endif 83.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 70000 && \ 84 ${MACHINE_CPUARCH} == "arm" && !${MACHINE_ARCH:Marmv[67]*} 85CWARNFLAGS.clang+= -Wno-atomic-alignment 86.endif 87.endif # WARNS <= 3 88.if ${WARNS} <= 2 89CWARNFLAGS.clang+= -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter 90.endif # WARNS <= 2 91.if ${WARNS} <= 1 92CWARNFLAGS.clang+= -Wno-parentheses 93.endif # WARNS <= 1 94.if defined(NO_WARRAY_BOUNDS) 95CWARNFLAGS.clang+= -Wno-array-bounds 96.endif # NO_WARRAY_BOUNDS 97.endif # WARNS 98 99.if defined(FORMAT_AUDIT) 100WFORMAT= 1 101.endif # FORMAT_AUDIT 102.if defined(WFORMAT) 103.if ${WFORMAT} > 0 104#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 105CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 106.if ${WARNS} <= 3 107CWARNFLAGS.clang+= -Wno-format-nonliteral 108.endif # WARNS <= 3 109.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE}) 110CWARNFLAGS+= -Werror 111.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE} 112.endif # WFORMAT > 0 113.endif # WFORMAT 114.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE}) 115CWARNFLAGS+= -Wno-format 116.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE} 117 118# GCC 5.2.0 119.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200 120CWARNFLAGS+= -Wno-error=address \ 121 -Wno-error=array-bounds \ 122 -Wno-error=attributes \ 123 -Wno-error=bool-compare \ 124 -Wno-error=cast-align \ 125 -Wno-error=clobbered \ 126 -Wno-error=enum-compare \ 127 -Wno-error=extra \ 128 -Wno-error=inline \ 129 -Wno-error=logical-not-parentheses \ 130 -Wno-error=strict-aliasing \ 131 -Wno-error=uninitialized \ 132 -Wno-error=unused-but-set-variable \ 133 -Wno-error=unused-function \ 134 -Wno-error=unused-value 135.endif 136 137# GCC 6.1.0 138.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100 139CWARNFLAGS+= -Wno-error=misleading-indentation \ 140 -Wno-error=nonnull-compare \ 141 -Wno-error=shift-negative-value \ 142 -Wno-error=tautological-compare \ 143 -Wno-error=unused-const-variable 144.endif 145 146# GCC 7.1.0 147.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 70100 148CWARNFLAGS+= -Wno-error=bool-operation \ 149 -Wno-error=deprecated \ 150 -Wno-error=expansion-to-defined \ 151 -Wno-error=format-overflow \ 152 -Wno-error=format-truncation \ 153 -Wno-error=implicit-fallthrough \ 154 -Wno-error=int-in-bool-context \ 155 -Wno-error=memset-elt-size \ 156 -Wno-error=noexcept-type \ 157 -Wno-error=nonnull \ 158 -Wno-error=pointer-compare \ 159 -Wno-error=stringop-overflow 160.endif 161 162# GCC 8.1.0 163.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 80100 164CWARNFLAGS+= -Wno-error=aggressive-loop-optimizations \ 165 -Wno-error=cast-function-type \ 166 -Wno-error=catch-value \ 167 -Wno-error=multistatement-macros \ 168 -Wno-error=restrict \ 169 -Wno-error=sizeof-pointer-memaccess \ 170 -Wno-error=stringop-truncation 171.endif 172 173# How to handle FreeBSD custom printf format specifiers. 174.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600 175FORMAT_EXTENSIONS= -D__printf__=__freebsd_kprintf__ 176.else 177FORMAT_EXTENSIONS= -fformat-extensions 178.endif 179 180.if defined(IGNORE_PRAGMA) 181CWARNFLAGS+= -Wno-unknown-pragmas 182.endif # IGNORE_PRAGMA 183 184# We need this conditional because many places that use it 185# only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}. 186# unconditionally, and can't easily use the CFLAGS.clang= 187# mechanism. 188.if ${COMPILER_TYPE} == "clang" 189CLANG_NO_IAS= -no-integrated-as 190.endif 191CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\ 192 -mllvm -simplifycfg-dup-ret 193.if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700 194CLANG_OPT_SMALL+= -mllvm -enable-gvn=false 195.else 196CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false 197.endif 198CFLAGS.clang+= -Qunused-arguments 199.if ${MACHINE_CPUARCH} == "sparc64" 200# Don't emit .cfi directives, since we must use GNU as on sparc64, for now. 201CFLAGS.clang+= -fno-dwarf2-cfi-asm 202.endif # SPARC64 203# The libc++ headers use c++11 extensions. These are normally silenced because 204# they are treated as system headers, but we explicitly disable that warning 205# suppression when building the base system to catch bugs in our headers. 206# Eventually we'll want to start building the base system C++ code as C++11, 207# but not yet. 208CXXFLAGS.clang+= -Wno-c++11-extensions 209 210.if ${MK_SSP} != "no" && \ 211 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 212.if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \ 213 (${COMPILER_TYPE} == "gcc" && \ 214 (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900)) 215# Don't use -Wstack-protector as it breaks world with -Werror. 216SSP_CFLAGS?= -fstack-protector-strong 217.else 218SSP_CFLAGS?= -fstack-protector 219.endif 220CFLAGS+= ${SSP_CFLAGS} 221.endif # SSP && !ARM && !MIPS 222 223# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is 224# enabled. 225DEBUG_FILES_CFLAGS?= -g 226 227# Allow user-specified additional warning flags, plus compiler and file 228# specific flag overrides, unless we've overridden this... 229.if ${MK_WARNS} != "no" 230CFLAGS+= ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}} 231CFLAGS+= ${CWARNFLAGS.${.IMPSRC:T}} 232.endif 233 234CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} 235CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}} 236 237AFLAGS+= ${AFLAGS.${.IMPSRC:T}} 238ACFLAGS+= ${ACFLAGS.${.IMPSRC:T}} 239CFLAGS+= ${CFLAGS.${.IMPSRC:T}} 240CXXFLAGS+= ${CXXFLAGS.${.IMPSRC:T}} 241 242LDFLAGS+= ${LDFLAGS.${LINKER_TYPE}} 243 244.if defined(SRCTOP) 245# Prevent rebuilding during install to support read-only objdirs. 246.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta) 247CFLAGS+= ERROR-tried-to-rebuild-during-make-install 248.endif 249.endif 250 251# Tell bmake not to mistake standard targets for things to be searched for 252# or expect to ever be up-to-date. 253PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \ 254 beforelinking build build-tools buildconfig buildfiles \ 255 buildincludes check checkdpadd clean cleandepend cleandir \ 256 cleanobj configure depend distclean distribute exe \ 257 files html includes install installconfig installdirs \ 258 installfiles installincludes lint obj objlink objs objwarn \ 259 realinstall tags whereobj 260 261# we don't want ${PROG} to be PHONY 262.PHONY: ${PHONY_NOTMAIN:N${PROG:U}} 263.NOTMAIN: ${PHONY_NOTMAIN:Nall} 264 265.if ${MK_STAGING} != "no" 266.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*)) 267_SKIP_STAGING?= yes 268.endif 269.if ${_SKIP_STAGING:Uno} == "yes" 270staging stage_libs stage_files stage_as stage_links stage_symlinks: 271.else 272# allow targets like beforeinstall to be leveraged 273DESTDIR= ${STAGE_OBJTOP} 274.export DESTDIR 275 276.if target(beforeinstall) 277.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 278staging: beforeinstall 279.endif 280.endif 281 282# normally only libs and includes are staged 283.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG) 284STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR} 285 286.if !empty(PROG) 287.if defined(PROGNAME) 288STAGE_AS_SETS+= prog 289STAGE_AS_${PROG}= ${PROGNAME} 290stage_as.prog: ${PROG} 291.else 292STAGE_SETS+= prog 293stage_files.prog: ${PROG} 294STAGE_TARGETS+= stage_files 295.endif 296.endif 297.endif 298 299.if !empty(_LIBS) && !defined(INTERNALLIB) 300.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != "" 301STAGE_SETS+= shlib 302STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR} 303STAGE_FILES.shlib+= ${_LIBS:M*.so.*} 304stage_files.shlib: ${_LIBS:M*.so.*} 305.endif 306 307.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld) 308STAGE_AS_SETS+= ldscript 309STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld 310stage_as.ldscript: ${SHLIB_LINK:R}.ld 311STAGE_DIR.ldscript = ${STAGE_LIBDIR} 312STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK} 313NO_SHLIB_LINKS= 314.endif 315 316.if target(stage_files.shlib) 317stage_libs: ${_LIBS} 318.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 319stage_files.shlib: ${SHLIB_NAME}.symbols 320.endif 321.else 322stage_libs: ${_LIBS} 323.endif 324.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 325stage_libs: ${SHLIB_NAME}.symbols 326.endif 327 328.endif 329 330.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes) 331.if !defined(NO_BEFOREBUILD_INCLUDES) 332stage_includes: buildincludes 333beforebuild: stage_includes 334.endif 335.endif 336 337.for t in stage_libs stage_files stage_as 338.if target($t) 339STAGE_TARGETS+= $t 340.endif 341.endfor 342 343.if !empty(STAGE_AS_SETS) 344STAGE_TARGETS+= stage_as 345.endif 346 347.if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 348 349.if !empty(LINKS) 350STAGE_TARGETS+= stage_links 351.if ${MAKE_VERSION} < 20131001 352stage_links.links: ${_LIBS} ${PROG} 353.endif 354STAGE_SETS+= links 355STAGE_LINKS.links= ${LINKS} 356.endif 357 358.if !empty(SYMLINKS) 359STAGE_TARGETS+= stage_symlinks 360STAGE_SETS+= links 361STAGE_SYMLINKS.links= ${SYMLINKS} 362.endif 363 364.endif 365 366.include <meta.stage.mk> 367.endif 368.endif 369 370.if defined(META_TARGETS) 371.for _tgt in ${META_TARGETS} 372.if target(${_tgt}) 373${_tgt}: ${META_DEPS} 374.endif 375.endfor 376.endif 377