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: http://gcc.gnu.org/onlinedocs/gcc-4.2.1/gcc/Warning-Options.html 10 11.include <bsd.compiler.mk> 12 13# the default is gnu99 for now 14CSTD?= gnu99 15 16.if ${CSTD} == "k&r" 17CFLAGS+= -traditional 18.elif ${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# BDECFLAGS 51.if ${WARNS} >= 6 52CWARNFLAGS+= -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\ 53 -Wold-style-definition 54.if !defined(NO_WMISSING_VARIABLE_DECLARATIONS) 55CWARNFLAGS.clang+= -Wmissing-variable-declarations 56.endif 57.if !defined(NO_WTHREAD_SAFETY) 58CWARNFLAGS.clang+= -Wthread-safety 59.endif 60.endif # WARNS >= 6 61.if ${WARNS} >= 2 && ${WARNS} <= 4 62# XXX Delete -Wuninitialized by default for now -- the compiler doesn't 63# XXX always get it right. 64CWARNFLAGS+= -Wno-uninitialized 65.endif # WARNS >=2 && WARNS <= 4 66CWARNFLAGS+= -Wno-pointer-sign 67# Clang has more warnings enabled by default, and when using -Wall, so if WARNS 68# is set to low values, these have to be disabled explicitly. 69.if ${WARNS} <= 6 70CWARNFLAGS.clang+= -Wno-empty-body -Wno-string-plus-int 71.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30400 72CWARNFLAGS.clang+= -Wno-unused-const-variable 73.endif 74.endif # WARNS <= 6 75.if ${WARNS} <= 3 76CWARNFLAGS.clang+= -Wno-tautological-compare -Wno-unused-value\ 77 -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion 78.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600 79CWARNFLAGS.clang+= -Wno-unused-local-typedef 80.endif 81.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 40000 82CWARNFLAGS.clang+= -Wno-address-of-packed-member 83.endif 84.endif # WARNS <= 3 85.if ${WARNS} <= 2 86CWARNFLAGS.clang+= -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter 87.endif # WARNS <= 2 88.if ${WARNS} <= 1 89CWARNFLAGS.clang+= -Wno-parentheses 90.endif # WARNS <= 1 91.if defined(NO_WARRAY_BOUNDS) 92CWARNFLAGS.clang+= -Wno-array-bounds 93.endif # NO_WARRAY_BOUNDS 94.endif # WARNS 95 96.if defined(FORMAT_AUDIT) 97WFORMAT= 1 98.endif # FORMAT_AUDIT 99.if defined(WFORMAT) 100.if ${WFORMAT} > 0 101#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 102CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 103.if ${WARNS} <= 3 104CWARNFLAGS.clang+= -Wno-format-nonliteral 105.endif # WARNS <= 3 106.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE}) 107CWARNFLAGS+= -Werror 108.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE} 109.endif # WFORMAT > 0 110.endif # WFORMAT 111.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE}) 112CWARNFLAGS+= -Wno-format 113.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE} 114 115# GCC 5.2.0 116.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200 117CWARNFLAGS+= -Wno-error=address \ 118 -Wno-error=array-bounds \ 119 -Wno-error=attributes \ 120 -Wno-error=bool-compare \ 121 -Wno-error=cast-align \ 122 -Wno-error=clobbered \ 123 -Wno-error=enum-compare \ 124 -Wno-error=extra \ 125 -Wno-error=inline \ 126 -Wno-error=logical-not-parentheses \ 127 -Wno-error=strict-aliasing \ 128 -Wno-error=uninitialized \ 129 -Wno-error=unused-but-set-variable \ 130 -Wno-error=unused-function \ 131 -Wno-error=unused-value 132.endif 133 134# GCC 5.3.0 135.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50300 136CWARNFLAGS+= -Wno-error=strict-overflow 137.endif 138 139# GCC 6.1.0 140.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100 141CWARNFLAGS+= -Wno-error=misleading-indentation \ 142 -Wno-error=nonnull-compare \ 143 -Wno-error=shift-negative-value \ 144 -Wno-error=tautological-compare \ 145 -Wno-error=unused-const-variable 146.endif 147 148# GCC 7.1.0 149.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 70100 150CWARNFLAGS+= -Wno-error=deprecated \ 151 -Wno-error=pointer-compare \ 152 -Wno-error=format-truncation \ 153 -Wno-error=implicit-fallthrough \ 154 -Wno-error=expansion-to-defined \ 155 -Wno-error=int-in-bool-context \ 156 -Wno-error=bool-operation \ 157 -Wno-error=format-overflow \ 158 -Wno-error=stringop-overflow \ 159 -Wno-error=memset-elt-size \ 160 -Wno-error=int-in-bool-context \ 161 -Wno-error=unused-const-variable \ 162 -Wno-error=nonnull 163.endif 164 165# How to handle FreeBSD custom printf format specifiers. 166.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600 167FORMAT_EXTENSIONS= -D__printf__=__freebsd_kprintf__ 168.else 169FORMAT_EXTENSIONS= -fformat-extensions 170.endif 171 172.if defined(IGNORE_PRAGMA) 173CWARNFLAGS+= -Wno-unknown-pragmas 174.endif # IGNORE_PRAGMA 175 176# We need this conditional because many places that use it 177# only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}. 178# unconditionally, and can't easily use the CFLAGS.clang= 179# mechanism. 180.if ${COMPILER_TYPE} == "clang" 181CLANG_NO_IAS= -no-integrated-as 182.endif 183CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\ 184 -mllvm -simplifycfg-dup-ret 185.if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700 186CLANG_OPT_SMALL+= -mllvm -enable-gvn=false 187.else 188CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false 189.endif 190CFLAGS.clang+= -Qunused-arguments 191.if ${MACHINE_CPUARCH} == "sparc64" 192# Don't emit .cfi directives, since we must use GNU as on sparc64, for now. 193CFLAGS.clang+= -fno-dwarf2-cfi-asm 194.endif # SPARC64 195# The libc++ headers use c++11 extensions. These are normally silenced because 196# they are treated as system headers, but we explicitly disable that warning 197# suppression when building the base system to catch bugs in our headers. 198# Eventually we'll want to start building the base system C++ code as C++11, 199# but not yet. 200CXXFLAGS.clang+= -Wno-c++11-extensions 201 202.if ${MK_SSP} != "no" && \ 203 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 204.if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \ 205 (${COMPILER_TYPE} == "gcc" && \ 206 (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900)) 207# Don't use -Wstack-protector as it breaks world with -Werror. 208SSP_CFLAGS?= -fstack-protector-strong 209.else 210SSP_CFLAGS?= -fstack-protector 211.endif 212CFLAGS+= ${SSP_CFLAGS} 213.endif # SSP && !ARM && !MIPS 214 215# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is 216# enabled. 217DEBUG_FILES_CFLAGS?= -g 218 219# Allow user-specified additional warning flags, plus compiler and file 220# specific flag overrides, unless we've overriden this... 221.if ${MK_WARNS} != "no" 222CFLAGS+= ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}} 223CFLAGS+= ${CWARNFLAGS.${.IMPSRC:T}} 224.endif 225 226CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} 227CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}} 228 229AFLAGS+= ${AFLAGS.${.IMPSRC:T}} 230ACFLAGS+= ${ACFLAGS.${.IMPSRC:T}} 231CFLAGS+= ${CFLAGS.${.IMPSRC:T}} 232CXXFLAGS+= ${CXXFLAGS.${.IMPSRC:T}} 233 234.if defined(SRCTOP) 235# Prevent rebuilding during install to support read-only objdirs. 236.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta) 237CFLAGS+= ERROR-tried-to-rebuild-during-make-install 238.endif 239.endif 240 241# Tell bmake not to mistake standard targets for things to be searched for 242# or expect to ever be up-to-date. 243PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \ 244 beforelinking build build-tools buildconfig buildfiles \ 245 buildincludes check checkdpadd clean cleandepend cleandir \ 246 cleanobj configure depend distclean distribute exe \ 247 files html includes install installconfig installfiles \ 248 installincludes lint obj objlink objs objwarn \ 249 realinstall tags whereobj 250 251# we don't want ${PROG} to be PHONY 252.PHONY: ${PHONY_NOTMAIN:N${PROG:U}} 253.NOTMAIN: ${PHONY_NOTMAIN:Nall} 254 255.if ${MK_STAGING} != "no" 256.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*)) 257_SKIP_STAGING?= yes 258.endif 259.if ${_SKIP_STAGING:Uno} == "yes" 260staging stage_libs stage_files stage_as stage_links stage_symlinks: 261.else 262# allow targets like beforeinstall to be leveraged 263DESTDIR= ${STAGE_OBJTOP} 264.export DESTDIR 265 266.if target(beforeinstall) 267.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 268staging: beforeinstall 269.endif 270.endif 271 272# normally only libs and includes are staged 273.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG) 274STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR} 275 276.if !empty(PROG) 277.if defined(PROGNAME) 278STAGE_AS_SETS+= prog 279STAGE_AS_${PROG}= ${PROGNAME} 280stage_as.prog: ${PROG} 281.else 282STAGE_SETS+= prog 283stage_files.prog: ${PROG} 284STAGE_TARGETS+= stage_files 285.endif 286.endif 287.endif 288 289.if !empty(_LIBS) && !defined(INTERNALLIB) 290.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != "" 291STAGE_SETS+= shlib 292STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR} 293STAGE_FILES.shlib+= ${_LIBS:M*.so.*} 294stage_files.shlib: ${_LIBS:M*.so.*} 295.endif 296 297.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld) 298STAGE_AS_SETS+= ldscript 299STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld 300stage_as.ldscript: ${SHLIB_LINK:R}.ld 301STAGE_DIR.ldscript = ${STAGE_LIBDIR} 302STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK} 303NO_SHLIB_LINKS= 304.endif 305 306.if target(stage_files.shlib) 307stage_libs: ${_LIBS} 308.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 309stage_files.shlib: ${SHLIB_NAME}.symbols 310.endif 311.else 312stage_libs: ${_LIBS} 313.endif 314.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 315stage_libs: ${SHLIB_NAME}.symbols 316.endif 317 318.endif 319 320.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes) 321.if !defined(NO_BEFOREBUILD_INCLUDES) 322stage_includes: buildincludes 323beforebuild: stage_includes 324.endif 325.endif 326 327.for t in stage_libs stage_files stage_as 328.if target($t) 329STAGE_TARGETS+= $t 330.endif 331.endfor 332 333.if !empty(STAGE_AS_SETS) 334STAGE_TARGETS+= stage_as 335.endif 336 337.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 338 339.if !empty(LINKS) 340STAGE_TARGETS+= stage_links 341.if ${MAKE_VERSION} < 20131001 342stage_links.links: ${_LIBS} ${PROG} 343.endif 344STAGE_SETS+= links 345STAGE_LINKS.links= ${LINKS} 346.endif 347 348.if !empty(SYMLINKS) 349STAGE_TARGETS+= stage_symlinks 350STAGE_SETS+= links 351STAGE_SYMLINKS.links= ${SYMLINKS} 352.endif 353 354.endif 355 356.include <meta.stage.mk> 357.endif 358.endif 359 360.if defined(META_TARGETS) 361.for _tgt in ${META_TARGETS} 362.if target(${_tgt}) 363${_tgt}: ${META_DEPS} 364.endif 365.endfor 366.endif 367