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 5.3.0 132.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50300 133CWARNFLAGS+= -Wno-error=strict-overflow 134.endif 135 136# GCC 6.1.0 137.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100 138CWARNFLAGS+= -Wno-error=misleading-indentation \ 139 -Wno-error=nonnull-compare \ 140 -Wno-error=shift-negative-value \ 141 -Wno-error=tautological-compare \ 142 -Wno-error=unused-const-variable 143.endif 144 145# How to handle FreeBSD custom printf format specifiers. 146.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600 147FORMAT_EXTENSIONS= -D__printf__=__freebsd_kprintf__ 148.else 149FORMAT_EXTENSIONS= -fformat-extensions 150.endif 151 152.if defined(IGNORE_PRAGMA) 153CWARNFLAGS+= -Wno-unknown-pragmas 154.endif # IGNORE_PRAGMA 155 156# We need this conditional because many places that use it 157# only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}. 158# unconditionally, and can't easily use the CFLAGS.clang= 159# mechanism. 160.if ${COMPILER_TYPE} == "clang" 161CLANG_NO_IAS= -no-integrated-as 162.endif 163CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\ 164 -mllvm -simplifycfg-dup-ret 165.if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700 166CLANG_OPT_SMALL+= -mllvm -enable-gvn=false 167.else 168CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false 169.endif 170CFLAGS.clang+= -Qunused-arguments 171.if ${MACHINE_CPUARCH} == "sparc64" 172# Don't emit .cfi directives, since we must use GNU as on sparc64, for now. 173CFLAGS.clang+= -fno-dwarf2-cfi-asm 174.endif # SPARC64 175# The libc++ headers use c++11 extensions. These are normally silenced because 176# they are treated as system headers, but we explicitly disable that warning 177# suppression when building the base system to catch bugs in our headers. 178# Eventually we'll want to start building the base system C++ code as C++11, 179# but not yet. 180CXXFLAGS.clang+= -Wno-c++11-extensions 181 182.if ${MK_SSP} != "no" && \ 183 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 184.if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \ 185 (${COMPILER_TYPE} == "gcc" && \ 186 (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900)) 187# Don't use -Wstack-protector as it breaks world with -Werror. 188SSP_CFLAGS?= -fstack-protector-strong 189.else 190SSP_CFLAGS?= -fstack-protector 191.endif 192CFLAGS+= ${SSP_CFLAGS} 193.endif # SSP && !ARM && !MIPS 194 195# Allow user-specified additional warning flags, plus compiler and file 196# specific flag overrides, unless we've overriden this... 197.if ${MK_WARNS} != "no" 198CFLAGS+= ${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}} 199CFLAGS+= ${CWARNFLAGS.${.IMPSRC:T}} 200.endif 201 202CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} 203CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}} 204 205AFLAGS+= ${AFLAGS.${.IMPSRC:T}} 206ACFLAGS+= ${ACFLAGS.${.IMPSRC:T}} 207CFLAGS+= ${CFLAGS.${.IMPSRC:T}} 208CXXFLAGS+= ${CXXFLAGS.${.IMPSRC:T}} 209 210.if defined(SRCTOP) 211# Prevent rebuilding during install to support read-only objdirs. 212.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta) 213CFLAGS+= ERROR-tried-to-rebuild-during-make-install 214.endif 215.endif 216 217# Tell bmake not to mistake standard targets for things to be searched for 218# or expect to ever be up-to-date. 219PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \ 220 beforelinking build build-tools buildconfig buildfiles \ 221 buildincludes check checkdpadd clean cleandepend cleandir \ 222 cleanobj configure depend distclean distribute exe \ 223 files html includes install installconfig installfiles \ 224 installincludes lint obj objlink objs objwarn \ 225 realinstall tags whereobj 226 227# we don't want ${PROG} to be PHONY 228.PHONY: ${PHONY_NOTMAIN:N${PROG:U}} 229.NOTMAIN: ${PHONY_NOTMAIN:Nall} 230 231.if ${MK_STAGING} != "no" 232.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*)) 233_SKIP_STAGING?= yes 234.endif 235.if ${_SKIP_STAGING:Uno} == "yes" 236staging stage_libs stage_files stage_as stage_links stage_symlinks: 237.else 238# allow targets like beforeinstall to be leveraged 239DESTDIR= ${STAGE_OBJTOP} 240.export DESTDIR 241 242.if target(beforeinstall) 243.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 244staging: beforeinstall 245.endif 246.endif 247 248# normally only libs and includes are staged 249.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG) 250STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR} 251 252.if !empty(PROG) 253.if defined(PROGNAME) 254STAGE_AS_SETS+= prog 255STAGE_AS_${PROG}= ${PROGNAME} 256stage_as.prog: ${PROG} 257.else 258STAGE_SETS+= prog 259stage_files.prog: ${PROG} 260STAGE_TARGETS+= stage_files 261.endif 262.endif 263.endif 264 265.if !empty(_LIBS) && !defined(INTERNALLIB) 266.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != "" 267STAGE_SETS+= shlib 268STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR} 269STAGE_FILES.shlib+= ${_LIBS:M*.so.*} 270stage_files.shlib: ${_LIBS:M*.so.*} 271.endif 272 273.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld) 274STAGE_AS_SETS+= ldscript 275STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld 276stage_as.ldscript: ${SHLIB_LINK:R}.ld 277STAGE_DIR.ldscript = ${STAGE_LIBDIR} 278STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK} 279NO_SHLIB_LINKS= 280.endif 281 282.if target(stage_files.shlib) 283stage_libs: ${_LIBS} 284.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 285stage_files.shlib: ${SHLIB_NAME}.symbols 286.endif 287.else 288stage_libs: ${_LIBS} 289.endif 290.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols) 291stage_libs: ${SHLIB_NAME}.symbols 292.endif 293 294.endif 295 296.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes) 297.if !defined(NO_BEFOREBUILD_INCLUDES) 298stage_includes: buildincludes 299beforebuild: stage_includes 300.endif 301.endif 302 303.for t in stage_libs stage_files stage_as 304.if target($t) 305STAGE_TARGETS+= $t 306.endif 307.endfor 308 309.if !empty(STAGE_AS_SETS) 310STAGE_TARGETS+= stage_as 311.endif 312 313.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)) 314 315.if !empty(LINKS) 316STAGE_TARGETS+= stage_links 317.if ${MAKE_VERSION} < 20131001 318stage_links.links: ${_LIBS} ${PROG} 319.endif 320STAGE_SETS+= links 321STAGE_LINKS.links= ${LINKS} 322.endif 323 324.if !empty(SYMLINKS) 325STAGE_TARGETS+= stage_symlinks 326STAGE_SETS+= links 327STAGE_SYMLINKS.links= ${SYMLINKS} 328.endif 329 330.endif 331 332.include <meta.stage.mk> 333.endif 334.endif 335 336.if defined(META_TARGETS) 337.for _tgt in ${META_TARGETS} 338.if target(${_tgt}) 339${_tgt}: ${META_DEPS} 340.endif 341.endfor 342.endif 343