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.endif # WARNS <= 3 82.if ${WARNS} <= 2 83CWARNFLAGS.clang+= -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter 84.endif # WARNS <= 2 85.if ${WARNS} <= 1 86CWARNFLAGS.clang+= -Wno-parentheses 87.endif # WARNS <= 1 88.if defined(NO_WARRAY_BOUNDS) 89CWARNFLAGS.clang+= -Wno-array-bounds 90.endif # NO_WARRAY_BOUNDS 91.endif # WARNS 92 93.if defined(FORMAT_AUDIT) 94WFORMAT= 1 95.endif # FORMAT_AUDIT 96.if defined(WFORMAT) 97.if ${WFORMAT} > 0 98#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 99CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 100.if ${WARNS} <= 3 101CWARNFLAGS.clang+= -Wno-format-nonliteral 102.endif # WARNS <= 3 103.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE}) 104CWARNFLAGS+= -Werror 105.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE} 106.endif # WFORMAT > 0 107.endif # WFORMAT 108.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE}) 109CWARNFLAGS+= -Wno-format 110.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE} 111 112# GCC 5.2.0 113.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200 114CWARNFLAGS+= -Wno-error=address \ 115 -Wno-error=array-bounds \ 116 -Wno-error=attributes \ 117 -Wno-error=bool-compare \ 118 -Wno-error=cast-align \ 119 -Wno-error=clobbered \ 120 -Wno-error=enum-compare \ 121 -Wno-error=extra \ 122 -Wno-error=inline \ 123 -Wno-error=logical-not-parentheses \ 124 -Wno-error=strict-aliasing \ 125 -Wno-error=uninitialized \ 126 -Wno-error=unused-but-set-variable \ 127 -Wno-error=unused-function \ 128 -Wno-error=unused-value 129.endif 130 131# GCC 6.1.0 132.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100 133CWARNFLAGS+= -Wno-error=misleading-indentation \ 134 -Wno-error=nonnull-compare \ 135 -Wno-error=shift-negative-value \ 136 -Wno-error=tautological-compare \ 137 -Wno-error=unused-const-variable 138.endif 139 140# How to handle FreeBSD custom printf format specifiers. 141.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600 142FORMAT_EXTENSIONS= -D__printf__=__freebsd_kprintf__ 143.else 144FORMAT_EXTENSIONS= -fformat-extensions 145.endif 146 147.if defined(IGNORE_PRAGMA) 148CWARNFLAGS+= -Wno-unknown-pragmas 149.endif # IGNORE_PRAGMA 150 151# We need this conditional because many places that use it 152# only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}. 153# unconditionally, and can't easily use the CFLAGS.clang= 154# mechanism. 155.if ${COMPILER_TYPE} == "clang" 156CLANG_NO_IAS= -no-integrated-as 157.endif 158CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\ 159 -mllvm -simplifycfg-dup-ret 160.if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700 161CLANG_OPT_SMALL+= -mllvm -enable-gvn=false 162.else 163CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false 164.endif 165CFLAGS.clang+= -Qunused-arguments 166.if ${MACHINE_CPUARCH} == "sparc64" 167# Don't emit .cfi directives, since we must use GNU as on sparc64, for now. 168CFLAGS.clang+= -fno-dwarf2-cfi-asm 169.endif # SPARC64 170# The libc++ headers use c++11 extensions. These are normally silenced because 171# they are treated as system headers, but we explicitly disable that warning 172# suppression when building the base system to catch bugs in our headers. 173# Eventually we'll want to start building the base system C++ code as C++11, 174# but not yet. 175CXXFLAGS.clang+= -Wno-c++11-extensions 176 177.if ${MK_SSP} != "no" && \ 178 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 179.if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \ 180 (${COMPILER_TYPE} == "gcc" && \ 181 (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900)) 182# Don't use -Wstack-protector as it breaks world with -Werror. 183SSP_CFLAGS?= -fstack-protector-strong 184.else 185SSP_CFLAGS?= -fstack-protector 186.endif 187CFLAGS+= ${SSP_CFLAGS} 188.endif # SSP && !ARM && !MIPS 189 190# Allow user-specified additional warning flags, plus compiler and file 191# specific flag overrides, unless we've overriden this... 192.if ${MK_WARNS} != "no" 193CFLAGS+= ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}} 194CFLAGS+= ${CWARNFLAGS.${.IMPSRC:T}} 195.endif 196 197CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} 198CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}} 199 200AFLAGS+= ${AFLAGS.${.IMPSRC:T}} 201ACFLAGS+= ${ACFLAGS.${.IMPSRC:T}} 202CFLAGS+= ${CFLAGS.${.IMPSRC:T}} 203CXXFLAGS+= ${CXXFLAGS.${.IMPSRC:T}} 204 205.if defined(SRCTOP) 206# Prevent rebuilding during install to support read-only objdirs. 207.if !make(all) && make(install) && empty(.MAKE.MODE:Mmeta) 208CFLAGS+= ERROR-tried-to-rebuild-during-make-install 209.endif 210.endif 211 212# Tell bmake not to mistake standard targets for things to be searched for 213# or expect to ever be up-to-date. 214PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \ 215 beforelinking build build-tools buildconfig buildfiles \ 216 buildincludes check checkdpadd clean cleandepend cleandir \ 217 cleanobj configure depend distclean distribute exe \ 218 files html includes install installconfig installfiles \ 219 installincludes lint obj objlink objs objwarn \ 220 realinstall tags whereobj 221 222# we don't want ${PROG} to be PHONY 223.PHONY: ${PHONY_NOTMAIN:N${PROG:U}} 224.NOTMAIN: ${PHONY_NOTMAIN:Nall} 225 226.if ${MK_STAGING} != "no" 227.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*)) 228_SKIP_STAGING?= yes 229.endif 230.if ${_SKIP_STAGING:Uno} == "yes" 231staging stage_libs stage_files stage_as stage_links stage_symlinks: 232.else 233# allow targets like beforeinstall to be leveraged 234DESTDIR= ${STAGE_OBJTOP} 235.export DESTDIR 236 237.if target(beforeinstall) 238.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 239staging: beforeinstall 240.endif 241.endif 242 243# normally only libs and includes are staged 244.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG) 245STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR} 246 247.if !empty(PROG) 248.if defined(PROGNAME) 249STAGE_AS_SETS+= prog 250STAGE_AS_${PROG}= ${PROGNAME} 251stage_as.prog: ${PROG} 252.else 253STAGE_SETS+= prog 254stage_files.prog: ${PROG} 255STAGE_TARGETS+= stage_files 256.endif 257.endif 258.endif 259 260.if !empty(_LIBS) && !defined(INTERNALLIB) 261.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != "" 262STAGE_SETS+= shlib 263STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR} 264STAGE_FILES.shlib+= ${_LIBS:M*.so.*} 265stage_files.shlib: ${_LIBS:M*.so.*} 266.endif 267 268.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld) 269STAGE_AS_SETS+= ldscript 270STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld 271stage_as.ldscript: ${SHLIB_LINK:R}.ld 272STAGE_DIR.ldscript = ${STAGE_LIBDIR} 273STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK} 274NO_SHLIB_LINKS= 275.endif 276 277.if target(stage_files.shlib) 278stage_libs: ${_LIBS} 279.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 280stage_files.shlib: ${SHLIB_NAME}.symbols 281.endif 282.else 283stage_libs: ${_LIBS} 284.endif 285.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 286stage_libs: ${SHLIB_NAME}.symbols 287.endif 288 289.endif 290 291.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes) 292.if !defined(NO_BEFOREBUILD_INCLUDES) 293stage_includes: buildincludes 294beforebuild: stage_includes 295.endif 296.endif 297 298.for t in stage_libs stage_files stage_as 299.if target($t) 300STAGE_TARGETS+= $t 301.endif 302.endfor 303 304.if !empty(STAGE_AS_SETS) 305STAGE_TARGETS+= stage_as 306.endif 307 308.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 309 310.if !empty(LINKS) 311STAGE_TARGETS+= stage_links 312.if ${MAKE_VERSION} < 20131001 313stage_links.links: ${_LIBS} ${PROG} 314.endif 315STAGE_SETS+= links 316STAGE_LINKS.links= ${LINKS} 317.endif 318 319.if !empty(SYMLINKS) 320STAGE_TARGETS+= stage_symlinks 321STAGE_SETS+= links 322STAGE_SYMLINKS.links= ${SYMLINKS} 323.endif 324 325.endif 326 327.include <meta.stage.mk> 328.endif 329.endif 330 331.if defined(META_TARGETS) 332.for _tgt in ${META_TARGETS} 333.if target(${_tgt}) 334${_tgt}: ${META_DEPS} 335.endif 336.endfor 337.endif 338