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# How to handle FreeBSD custom printf format specifiers. 149.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600 150FORMAT_EXTENSIONS= -D__printf__=__freebsd_kprintf__ 151.else 152FORMAT_EXTENSIONS= -fformat-extensions 153.endif 154 155.if defined(IGNORE_PRAGMA) 156CWARNFLAGS+= -Wno-unknown-pragmas 157.endif # IGNORE_PRAGMA 158 159# We need this conditional because many places that use it 160# only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}. 161# unconditionally, and can't easily use the CFLAGS.clang= 162# mechanism. 163.if ${COMPILER_TYPE} == "clang" 164CLANG_NO_IAS= -no-integrated-as 165.endif 166CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\ 167 -mllvm -simplifycfg-dup-ret 168.if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700 169CLANG_OPT_SMALL+= -mllvm -enable-gvn=false 170.else 171CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false 172.endif 173CFLAGS.clang+= -Qunused-arguments 174.if ${MACHINE_CPUARCH} == "sparc64" 175# Don't emit .cfi directives, since we must use GNU as on sparc64, for now. 176CFLAGS.clang+= -fno-dwarf2-cfi-asm 177.endif # SPARC64 178# The libc++ headers use c++11 extensions. These are normally silenced because 179# they are treated as system headers, but we explicitly disable that warning 180# suppression when building the base system to catch bugs in our headers. 181# Eventually we'll want to start building the base system C++ code as C++11, 182# but not yet. 183CXXFLAGS.clang+= -Wno-c++11-extensions 184 185.if ${MK_SSP} != "no" && \ 186 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 187.if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \ 188 (${COMPILER_TYPE} == "gcc" && \ 189 (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900)) 190# Don't use -Wstack-protector as it breaks world with -Werror. 191SSP_CFLAGS?= -fstack-protector-strong 192.else 193SSP_CFLAGS?= -fstack-protector 194.endif 195CFLAGS+= ${SSP_CFLAGS} 196.endif # SSP && !ARM && !MIPS 197 198# Allow user-specified additional warning flags, plus compiler and file 199# specific flag overrides, unless we've overriden this... 200.if ${MK_WARNS} != "no" 201CFLAGS+= ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}} 202CFLAGS+= ${CWARNFLAGS.${.IMPSRC:T}} 203.endif 204 205CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} 206CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}} 207 208AFLAGS+= ${AFLAGS.${.IMPSRC:T}} 209ACFLAGS+= ${ACFLAGS.${.IMPSRC:T}} 210CFLAGS+= ${CFLAGS.${.IMPSRC:T}} 211CXXFLAGS+= ${CXXFLAGS.${.IMPSRC:T}} 212 213.if defined(SRCTOP) 214# Prevent rebuilding during install to support read-only objdirs. 215.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta) 216CFLAGS+= ERROR-tried-to-rebuild-during-make-install 217.endif 218.endif 219 220# Tell bmake not to mistake standard targets for things to be searched for 221# or expect to ever be up-to-date. 222PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \ 223 beforelinking build build-tools buildconfig buildfiles \ 224 buildincludes check checkdpadd clean cleandepend cleandir \ 225 cleanobj configure depend distclean distribute exe \ 226 files html includes install installconfig installfiles \ 227 installincludes lint obj objlink objs objwarn \ 228 realinstall tags whereobj 229 230# we don't want ${PROG} to be PHONY 231.PHONY: ${PHONY_NOTMAIN:N${PROG:U}} 232.NOTMAIN: ${PHONY_NOTMAIN:Nall} 233 234.if ${MK_STAGING} != "no" 235.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*)) 236_SKIP_STAGING?= yes 237.endif 238.if ${_SKIP_STAGING:Uno} == "yes" 239staging stage_libs stage_files stage_as stage_links stage_symlinks: 240.else 241# allow targets like beforeinstall to be leveraged 242DESTDIR= ${STAGE_OBJTOP} 243.export DESTDIR 244 245.if target(beforeinstall) 246.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 247staging: beforeinstall 248.endif 249.endif 250 251# normally only libs and includes are staged 252.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG) 253STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR} 254 255.if !empty(PROG) 256.if defined(PROGNAME) 257STAGE_AS_SETS+= prog 258STAGE_AS_${PROG}= ${PROGNAME} 259stage_as.prog: ${PROG} 260.else 261STAGE_SETS+= prog 262stage_files.prog: ${PROG} 263STAGE_TARGETS+= stage_files 264.endif 265.endif 266.endif 267 268.if !empty(_LIBS) && !defined(INTERNALLIB) 269.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != "" 270STAGE_SETS+= shlib 271STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR} 272STAGE_FILES.shlib+= ${_LIBS:M*.so.*} 273stage_files.shlib: ${_LIBS:M*.so.*} 274.endif 275 276.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld) 277STAGE_AS_SETS+= ldscript 278STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld 279stage_as.ldscript: ${SHLIB_LINK:R}.ld 280STAGE_DIR.ldscript = ${STAGE_LIBDIR} 281STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK} 282NO_SHLIB_LINKS= 283.endif 284 285.if target(stage_files.shlib) 286stage_libs: ${_LIBS} 287.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 288stage_files.shlib: ${SHLIB_NAME}.symbols 289.endif 290.else 291stage_libs: ${_LIBS} 292.endif 293.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 294stage_libs: ${SHLIB_NAME}.symbols 295.endif 296 297.endif 298 299.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes) 300.if !defined(NO_BEFOREBUILD_INCLUDES) 301stage_includes: buildincludes 302beforebuild: stage_includes 303.endif 304.endif 305 306.for t in stage_libs stage_files stage_as 307.if target($t) 308STAGE_TARGETS+= $t 309.endif 310.endfor 311 312.if !empty(STAGE_AS_SETS) 313STAGE_TARGETS+= stage_as 314.endif 315 316.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 317 318.if !empty(LINKS) 319STAGE_TARGETS+= stage_links 320.if ${MAKE_VERSION} < 20131001 321stage_links.links: ${_LIBS} ${PROG} 322.endif 323STAGE_SETS+= links 324STAGE_LINKS.links= ${LINKS} 325.endif 326 327.if !empty(SYMLINKS) 328STAGE_TARGETS+= stage_symlinks 329STAGE_SETS+= links 330STAGE_SYMLINKS.links= ${SYMLINKS} 331.endif 332 333.endif 334 335.include <meta.stage.mk> 336.endif 337.endif 338 339.if defined(META_TARGETS) 340.for _tgt in ${META_TARGETS} 341.if target(${_tgt}) 342${_tgt}: ${META_DEPS} 343.endif 344.endfor 345.endif 346