1# $FreeBSD: stable/10/share/mk/bsd.sys.mk 313790 2017-02-16 05:14:07Z ngie $ 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 NO_WARNS. 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.if !defined(NO_WARNS) 28# -pedantic is problematic because it also imposes namespace restrictions 29#CFLAGS+= -pedantic 30.if defined(WARNS) 31.if ${WARNS} >= 1 32CWARNFLAGS+= -Wsystem-headers 33.if !defined(NO_WERROR) && (${COMPILER_TYPE} != "clang" \ 34 || !defined(NO_WERROR.clang)) 35CWARNFLAGS+= -Werror 36.endif # !NO_WERROR && (!CLANG || !NO_WERROR.clang) 37.endif # WARNS >= 1 38.if ${WARNS} >= 2 39CWARNFLAGS+= -Wall -Wno-format-y2k 40.endif # WARNS >= 2 41.if ${WARNS} >= 3 42CWARNFLAGS+= -W -Wno-unused-parameter -Wstrict-prototypes\ 43 -Wmissing-prototypes -Wpointer-arith 44.endif # WARNS >= 3 45.if ${WARNS} >= 4 46CWARNFLAGS+= -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\ 47 -Wunused-parameter 48.if !defined(NO_WCAST_ALIGN) && (${COMPILER_TYPE} != "clang" \ 49 || !defined(NO_WCAST_ALIGN.clang)) 50CWARNFLAGS+= -Wcast-align 51.endif # !NO_WCAST_ALIGN && (!CLANG || !NO_WCAST_ALIGN.clang) 52.endif # WARNS >= 4 53# BDECFLAGS 54.if ${WARNS} >= 6 55CWARNFLAGS+= -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\ 56 -Wold-style-definition 57.if ${COMPILER_TYPE} == "clang" && !defined(EARLY_BUILD) && \ 58 !defined(NO_WMISSING_VARIABLE_DECLARATIONS) 59CWARNFLAGS+= -Wmissing-variable-declarations 60.endif 61.endif # WARNS >= 6 62.if ${WARNS} >= 2 && ${WARNS} <= 4 63# XXX Delete -Wuninitialized by default for now -- the compiler doesn't 64# XXX always get it right. 65CWARNFLAGS+= -Wno-uninitialized 66.endif # WARNS >=2 && WARNS <= 4 67CWARNFLAGS+= -Wno-pointer-sign 68# Clang has more warnings enabled by default, and when using -Wall, so if WARNS 69# is set to low values, these have to be disabled explicitly. 70.if ${COMPILER_TYPE} == "clang" && !defined(EARLY_BUILD) 71.if ${WARNS} <= 6 72CWARNFLAGS+= -Wno-empty-body -Wno-string-plus-int 73.if ${COMPILER_VERSION} > 30300 74CWARNFLAGS+= -Wno-unused-const-variable 75.endif 76.endif # WARNS <= 6 77.if ${WARNS} <= 3 78CWARNFLAGS+= -Wno-tautological-compare -Wno-unused-value\ 79 -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion 80.endif # WARNS <= 3 81.if ${WARNS} <= 2 82CWARNFLAGS+= -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter 83.endif # WARNS <= 2 84.if ${WARNS} <= 1 85CWARNFLAGS+= -Wno-parentheses 86.endif # WARNS <= 1 87.if defined(NO_WARRAY_BOUNDS) 88CWARNFLAGS+= -Wno-array-bounds 89.endif # NO_WARRAY_BOUNDS 90.endif # CLANG 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 ${COMPILER_TYPE} == "clang" && !defined(EARLY_BUILD) 101.if ${WARNS} <= 3 102CWARNFLAGS+= -Wno-format-nonliteral 103.endif # WARNS <= 3 104.endif # CLANG 105.if !defined(NO_WERROR) && (${COMPILER_TYPE} != "clang" \ 106 || !defined(NO_WERROR.clang)) 107CWARNFLAGS+= -Werror 108.endif # !NO_WERROR && (!CLANG || !NO_WERROR.clang) 109.endif # WFORMAT > 0 110.endif # WFORMAT 111.if defined(NO_WFORMAT) || (${COMPILER_TYPE} == "clang" && defined(NO_WFORMAT.clang)) 112CWARNFLAGS+= -Wno-format 113.endif # NO_WFORMAT || (CLANG && NO_WFORMAT.clang) 114.endif # !NO_WARNS 115 116.if defined(IGNORE_PRAGMA) 117CWARNFLAGS+= -Wno-unknown-pragmas 118.endif # IGNORE_PRAGMA 119 120.if !defined(EARLY_BUILD) 121.if ${COMPILER_TYPE} == "clang" 122CLANG_NO_IAS= -no-integrated-as 123CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\ 124 -mllvm -enable-load-pre=false -mllvm -simplifycfg-dup-ret 125CFLAGS+= -Qunused-arguments 126.if ${MACHINE_CPUARCH} == "sparc64" 127# Don't emit .cfi directives, since we must use GNU as on sparc64, for now. 128CFLAGS+= -fno-dwarf2-cfi-asm 129.endif # SPARC64 130# The libc++ headers use c++11 extensions. These are normally silenced because 131# they are treated as system headers, but we explicitly disable that warning 132# suppression when building the base system to catch bugs in our headers. 133# Eventually we'll want to start building the base system C++ code as C++11, 134# but not yet. 135CXXFLAGS+= -Wno-c++11-extensions 136CFLAGS+= ${CFLAGS.clang} 137CXXFLAGS+= ${CXXFLAGS.clang} 138.else # !CLANG 139GCC_MS_EXTENSIONS= -fms-extensions 140CFLAGS+= ${CFLAGS.gcc} 141CXXFLAGS+= ${CXXFLAGS.gcc} 142.endif # CLANG 143.endif # !EARLY_BUILD 144 145.if ${MK_SSP} != "no" && ${MACHINE_CPUARCH} != "ia64" && \ 146 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 147# Don't use -Wstack-protector as it breaks world with -Werror. 148SSP_CFLAGS?= -fstack-protector 149CFLAGS+= ${SSP_CFLAGS} 150.endif # SSP && !IA64 && !ARM && !MIPS 151 152# Allow user-specified additional warning flags and file specific flag 153# overrides. 154CFLAGS+= ${CWARNFLAGS} ${CWARNFLAGS.${.IMPSRC:T}} 155 156 157# Tell bmake not to mistake standard targets for things to be searched for 158# or expect to ever be up-to-date. 159PHONY_NOTMAIN = afterdepend afterinstall all beforedepend beforeinstall \ 160 beforelinking build build-tools buildfiles buildincludes \ 161 check checkdpadd clean cleandepend cleandir cleanobj configure \ 162 depend dependall distclean distribute exe extract \ 163 html includes install installfiles installincludes lint \ 164 obj objlink objs objwarn realall realdepend \ 165 realinstall subdir-all subdir-depend subdir-install \ 166 tags whereobj 167 168.if defined(PORTNAME) 169PHONY_NOTMAIN+= fetch patch 170.endif 171 172.PHONY: ${PHONY_NOTMAIN} 173.NOTMAIN: ${PHONY_NOTMAIN} 174