bsd.sys.mk revision 234237
176861Skris# $FreeBSD: stable/9/share/mk/bsd.sys.mk 234237 2012-04-13 21:35:24Z dim $ 276861Skris# 376861Skris# This file contains common settings used for building FreeBSD 476861Skris# sources. 576861Skris 676861Skris# Enable various levels of compiler warning checks. These may be 776861Skris# overridden (e.g. if using a non-gcc compiler) by defining NO_WARNS. 876861Skris 9234237Sdim# for GCC: http://gcc.gnu.org/onlinedocs/gcc-4.2.1/gcc/Warning-Options.html 1096316Sobrien 11189801Srdivacky# the default is gnu99 for now 12234237SdimCSTD?= gnu99 13189801Srdivacky 14220863Sdim.if ${CSTD} == "k&r" 15234237SdimCFLAGS+= -traditional 16220863Sdim.elif ${CSTD} == "c89" || ${CSTD} == "c90" 17234237SdimCFLAGS+= -std=iso9899:1990 18220863Sdim.elif ${CSTD} == "c94" || ${CSTD} == "c95" 19234237SdimCFLAGS+= -std=iso9899:199409 20220863Sdim.elif ${CSTD} == "c99" 21234237SdimCFLAGS+= -std=iso9899:1999 22234237Sdim.else # CSTD 23234237SdimCFLAGS+= -std=${CSTD} 24234237Sdim.endif # CSTD 25220863Sdim.if !defined(NO_WARNS) 26161214Sdes# -pedantic is problematic because it also imposes namespace restrictions 27234237Sdim#CFLAGS+= -pedantic 28234237Sdim.if defined(WARNS) 29234237Sdim.if ${WARNS} >= 1 30234237SdimCWARNFLAGS+= -Wsystem-headers 31234237Sdim.if !defined(NO_WERROR) && ((${MK_CLANG_IS_CC} == "no" && \ 32234237Sdim ${CC:T:Mclang} != "clang") || !defined(NO_WERROR.clang)) 33234237SdimCWARNFLAGS+= -Werror 34234237Sdim.endif # !NO_WERROR && (!CLANG || !NO_WERROR.clang) 35234237Sdim.endif # WARNS >= 1 36234237Sdim.if ${WARNS} >= 2 37234237SdimCWARNFLAGS+= -Wall -Wno-format-y2k 38234237Sdim.endif # WARNS >= 2 39234237Sdim.if ${WARNS} >= 3 40234237SdimCWARNFLAGS+= -W -Wno-unused-parameter -Wstrict-prototypes\ 41234237Sdim -Wmissing-prototypes -Wpointer-arith 42234237Sdim.endif # WARNS >= 3 43234237Sdim.if ${WARNS} >= 4 44234237SdimCWARNFLAGS+= -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\ 45234237Sdim -Wunused-parameter 46234237Sdim.if !defined(NO_WCAST_ALIGN) && ((${MK_CLANG_IS_CC} == "no" && \ 47234237Sdim ${CC:T:Mclang} != "clang") || !defined(NO_WCAST_ALIGN.clang)) 48234237SdimCWARNFLAGS+= -Wcast-align 49234237Sdim.endif # !NO_WCAST_ALIGN && (!CLANG || !NO_WCAST_ALIGN.clang) 50234237Sdim.endif # WARNS >= 4 5194332Sobrien# BDECFLAGS 52234237Sdim.if ${WARNS} >= 6 53234237SdimCWARNFLAGS+= -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\ 54234237Sdim -Wold-style-definition 55234237Sdim.endif # WARNS >= 6 56234237Sdim.if ${WARNS} >= 2 && ${WARNS} <= 4 5788936Sdwmalone# XXX Delete -Wuninitialized by default for now -- the compiler doesn't 5888936Sdwmalone# XXX always get it right. 59234237SdimCWARNFLAGS+= -Wno-uninitialized 60234237Sdim.endif # WARNS >=2 && WARNS <= 4 61234237SdimCWARNFLAGS+= -Wno-pointer-sign 62229087Sdim# Clang has more warnings enabled by default, and when using -Wall, so if WARNS 63229087Sdim# is set to low values, these have to be disabled explicitly. 64234237Sdim.if ${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang" 65234237Sdim.if ${WARNS} <= 3 66234237SdimCWARNFLAGS+= -Wno-tautological-compare -Wno-unused-value\ 67234237Sdim -Wno-parentheses-equality -Wno-unused-function -Wno-conversion 68234237Sdim.endif # WARNS <= 3 69234237Sdim.if ${WARNS} <= 2 70234237SdimCWARNFLAGS+= -Wno-switch-enum -Wno-empty-body 71234237Sdim.endif # WARNS <= 2 72234237Sdim.if ${WARNS} <= 1 73234237SdimCWARNFLAGS+= -Wno-parentheses 74234237Sdim.endif # WARNS <= 1 75234237Sdim.if defined(NO_WARRAY_BOUNDS) 76234237SdimCWARNFLAGS+= -Wno-array-bounds 77234237Sdim.endif # NO_WARRAY_BOUNDS 78234237Sdim.endif # CLANG 79234237Sdim.endif # WARNS 8076861Skris 81234237Sdim.if defined(FORMAT_AUDIT) 82234237SdimWFORMAT= 1 83234237Sdim.endif # FORMAT_AUDIT 84234237Sdim.if defined(WFORMAT) 85234237Sdim.if ${WFORMAT} > 0 86234237Sdim#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 87234237SdimCWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 88234237Sdim.if !defined(NO_WERROR) && ((${MK_CLANG_IS_CC} == "no" && \ 89234237Sdim ${CC:T:Mclang} != "clang") || !defined(NO_WERROR.clang)) 90234237SdimCWARNFLAGS+= -Werror 91234237Sdim.endif # !NO_WERROR && (!CLANG || !NO_WERROR.clang) 92234237Sdim.endif # WFORMAT > 0 93234237Sdim.endif # WFORMAT 94234237Sdim.if defined(NO_WFORMAT) || ((${MK_CLANG_IS_CC} != "no" || \ 95234237Sdim ${CC:T:Mclang} == "clang") && defined(NO_WFORMAT.clang)) 96234237SdimCWARNFLAGS+= -Wno-format 97234237Sdim.endif # NO_WFORMAT || (CLANG && NO_WFORMAT.clang) 98234237Sdim.endif # !NO_WARNS 9976861Skris 100163971Sjb.if defined(IGNORE_PRAGMA) 101234237SdimCWARNFLAGS+= -Wno-unknown-pragmas 102234237Sdim.endif # IGNORE_PRAGMA 103163971Sjb 104233099Sdim.if ${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang" 105234237SdimCLANG_NO_IAS= -no-integrated-as 106234237SdimCLANG_OPT_SMALL= -mllvm -stack-alignment=8 -mllvm -inline-threshold=3\ 107234237Sdim -mllvm -enable-load-pre=false -mllvm -simplifycfg-dup-ret 108234237Sdim.endif # CLANG 109232930Sdim 110220863Sdim.if ${MK_SSP} != "no" && ${MACHINE_CPUARCH} != "ia64" && \ 111220863Sdim ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 112180012Sru# Don't use -Wstack-protector as it breaks world with -Werror. 113234237SdimSSP_CFLAGS?= -fstack-protector 114234237SdimCFLAGS+= ${SSP_CFLAGS} 115234237Sdim.endif # SSP && !IA64 && !ARM && !MIPS 116180012Sru 11776861Skris# Allow user-specified additional warning flags 118234237SdimCFLAGS+= ${CWARNFLAGS} 119