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