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 NO_WARNS. 8 9# for GCC: http://gcc.gnu.org/onlinedocs/gcc-4.2.1/gcc/Warning-Options.html 10 11# the default is gnu99 for now 12CSTD?= gnu99 13 14.if ${CSTD} == "k&r" 15CFLAGS+= -traditional 16.elif ${CSTD} == "c89" || ${CSTD} == "c90" 17CFLAGS+= -std=iso9899:1990 18.elif ${CSTD} == "c94" || ${CSTD} == "c95" 19CFLAGS+= -std=iso9899:199409 20.elif ${CSTD} == "c99" 21CFLAGS+= -std=iso9899:1999 22.else # CSTD 23CFLAGS+= -std=${CSTD} 24.endif # CSTD 25.if !defined(NO_WARNS) 26# -pedantic is problematic because it also imposes namespace restrictions 27#CFLAGS+= -pedantic 28.if defined(WARNS) 29.if ${WARNS} >= 1 30CWARNFLAGS+= -Wsystem-headers 31.if !defined(NO_WERROR) && ((${MK_CLANG_IS_CC} == "no" && \ 32 ${CC:T:Mclang} != "clang") || !defined(NO_WERROR.clang)) 33CWARNFLAGS+= -Werror 34.endif # !NO_WERROR && (!CLANG || !NO_WERROR.clang) 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 ${WARNS} >= 4 44CWARNFLAGS+= -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\ 45 -Wunused-parameter 46.if !defined(NO_WCAST_ALIGN) && ((${MK_CLANG_IS_CC} == "no" && \ 47 ${CC:T:Mclang} != "clang") || !defined(NO_WCAST_ALIGN.clang)) 48CWARNFLAGS+= -Wcast-align 49.endif # !NO_WCAST_ALIGN && (!CLANG || !NO_WCAST_ALIGN.clang) 50.endif # WARNS >= 4 51# BDECFLAGS 52.if ${WARNS} >= 6 53CWARNFLAGS+= -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\ 54 -Wold-style-definition 55.endif # WARNS >= 6 56.if ${WARNS} >= 2 && ${WARNS} <= 4 57# XXX Delete -Wuninitialized by default for now -- the compiler doesn't 58# XXX always get it right. 59CWARNFLAGS+= -Wno-uninitialized 60.endif # WARNS >=2 && WARNS <= 4 61CWARNFLAGS+= -Wno-pointer-sign 62# Clang has more warnings enabled by default, and when using -Wall, so if WARNS 63# is set to low values, these have to be disabled explicitly. 64.if ${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang" 65.if ${WARNS} <= 6 66CWARNFLAGS+= -Wno-empty-body -Wno-string-plus-int 67.endif # WARNS <= 6 68.if ${WARNS} <= 3 69CWARNFLAGS+= -Wno-tautological-compare -Wno-unused-value\ 70 -Wno-parentheses-equality -Wno-unused-function -Wno-conversion 71.endif # WARNS <= 3 72.if ${WARNS} <= 2 73CWARNFLAGS+= -Wno-switch -Wno-switch-enum 74.endif # WARNS <= 2 75.if ${WARNS} <= 1 76CWARNFLAGS+= -Wno-parentheses 77.endif # WARNS <= 1 78.if defined(NO_WARRAY_BOUNDS) 79CWARNFLAGS+= -Wno-array-bounds 80.endif # NO_WARRAY_BOUNDS 81.endif # CLANG 82.endif # WARNS 83 84.if defined(FORMAT_AUDIT) 85WFORMAT= 1 86.endif # FORMAT_AUDIT 87.if defined(WFORMAT) 88.if ${WFORMAT} > 0 89#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 90CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 91.if ${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang" 92.if ${WARNS} <= 3 93CWARNFLAGS+= -Wno-format-nonliteral 94.endif # WARNS <= 3 95.endif # CLANG 96.if !defined(NO_WERROR) && ((${MK_CLANG_IS_CC} == "no" && \ 97 ${CC:T:Mclang} != "clang") || !defined(NO_WERROR.clang)) 98CWARNFLAGS+= -Werror 99.endif # !NO_WERROR && (!CLANG || !NO_WERROR.clang) 100.endif # WFORMAT > 0 101.endif # WFORMAT 102.if defined(NO_WFORMAT) || ((${MK_CLANG_IS_CC} != "no" || \ 103 ${CC:T:Mclang} == "clang") && defined(NO_WFORMAT.clang)) 104CWARNFLAGS+= -Wno-format 105.endif # NO_WFORMAT || (CLANG && NO_WFORMAT.clang) 106.endif # !NO_WARNS 107 108.if defined(IGNORE_PRAGMA) 109CWARNFLAGS+= -Wno-unknown-pragmas 110.endif # IGNORE_PRAGMA 111 112.if ${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang" 113CLANG_NO_IAS= -no-integrated-as 114CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\ 115 -mllvm -enable-load-pre=false -mllvm -simplifycfg-dup-ret 116CFLAGS+= -Qunused-arguments 117.endif # CLANG 118 119.if ${MK_SSP} != "no" && ${MACHINE_CPUARCH} != "ia64" && \ 120 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 121# Don't use -Wstack-protector as it breaks world with -Werror. 122SSP_CFLAGS?= -fstack-protector 123CFLAGS+= ${SSP_CFLAGS} 124.endif # SSP && !IA64 && !ARM && !MIPS 125 126# Allow user-specified additional warning flags 127CFLAGS+= ${CWARNFLAGS} 128 129 130# Tell bmake not to misstake standard targets for things to be searched for 131# or expect to ever be up-to-date. 132PHONY_NOTMAIN = afterdepend afterinstall all beforedepend beforeinstall \ 133 beforelinking build build-tools buildfiles buildincludes \ 134 checkdpadd clean cleandepend cleandir cleanobj configure \ 135 depend dependall distclean distribute exe extract fetch \ 136 html includes install installfiles installincludes lint \ 137 obj objlink objs objwarn patch realall realdepend \ 138 realinstall regress subdir-all subdir-depend subdir-install \ 139 tags whereobj 140 141.PHONY: ${PHONY_NOTMAIN} 142.NOTMAIN: ${PHONY_NOTMAIN} 143