bsd.sys.mk revision 235633
176861Skris# $FreeBSD: stable/9/share/mk/bsd.sys.mk 235633 2012-05-18 21:49:11Z 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" 65235633Sdim.if ${WARNS} <= 6 66235633SdimCWARNFLAGS+= -Wno-empty-body -Wno-string-plus-int 67235633Sdim.endif # WARNS <= 6 68234237Sdim.if ${WARNS} <= 3 69234237SdimCWARNFLAGS+= -Wno-tautological-compare -Wno-unused-value\ 70234237Sdim -Wno-parentheses-equality -Wno-unused-function -Wno-conversion 71234237Sdim.endif # WARNS <= 3 72234237Sdim.if ${WARNS} <= 2 73235633SdimCWARNFLAGS+= -Wno-switch -Wno-switch-enum 74234237Sdim.endif # WARNS <= 2 75234237Sdim.if ${WARNS} <= 1 76234237SdimCWARNFLAGS+= -Wno-parentheses 77234237Sdim.endif # WARNS <= 1 78234237Sdim.if defined(NO_WARRAY_BOUNDS) 79234237SdimCWARNFLAGS+= -Wno-array-bounds 80234237Sdim.endif # NO_WARRAY_BOUNDS 81234237Sdim.endif # CLANG 82234237Sdim.endif # WARNS 8376861Skris 84234237Sdim.if defined(FORMAT_AUDIT) 85234237SdimWFORMAT= 1 86234237Sdim.endif # FORMAT_AUDIT 87234237Sdim.if defined(WFORMAT) 88234237Sdim.if ${WFORMAT} > 0 89234237Sdim#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 90234237SdimCWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 91235633Sdim.if ${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang" 92235633Sdim.if ${WARNS} <= 3 93235633SdimCWARNFLAGS+= -Wno-format-nonliteral 94235633Sdim.endif # WARNS <= 3 95235633Sdim.endif # CLANG 96234237Sdim.if !defined(NO_WERROR) && ((${MK_CLANG_IS_CC} == "no" && \ 97234237Sdim ${CC:T:Mclang} != "clang") || !defined(NO_WERROR.clang)) 98234237SdimCWARNFLAGS+= -Werror 99234237Sdim.endif # !NO_WERROR && (!CLANG || !NO_WERROR.clang) 100234237Sdim.endif # WFORMAT > 0 101234237Sdim.endif # WFORMAT 102234237Sdim.if defined(NO_WFORMAT) || ((${MK_CLANG_IS_CC} != "no" || \ 103234237Sdim ${CC:T:Mclang} == "clang") && defined(NO_WFORMAT.clang)) 104234237SdimCWARNFLAGS+= -Wno-format 105234237Sdim.endif # NO_WFORMAT || (CLANG && NO_WFORMAT.clang) 106234237Sdim.endif # !NO_WARNS 10776861Skris 108163971Sjb.if defined(IGNORE_PRAGMA) 109234237SdimCWARNFLAGS+= -Wno-unknown-pragmas 110234237Sdim.endif # IGNORE_PRAGMA 111163971Sjb 112233099Sdim.if ${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang" 113234237SdimCLANG_NO_IAS= -no-integrated-as 114235633SdimCLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\ 115234237Sdim -mllvm -enable-load-pre=false -mllvm -simplifycfg-dup-ret 116235633SdimCFLAGS+= -Qunused-arguments 117234237Sdim.endif # CLANG 118232930Sdim 119220863Sdim.if ${MK_SSP} != "no" && ${MACHINE_CPUARCH} != "ia64" && \ 120220863Sdim ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 121180012Sru# Don't use -Wstack-protector as it breaks world with -Werror. 122234237SdimSSP_CFLAGS?= -fstack-protector 123234237SdimCFLAGS+= ${SSP_CFLAGS} 124234237Sdim.endif # SSP && !IA64 && !ARM && !MIPS 125180012Sru 12676861Skris# Allow user-specified additional warning flags 127234237SdimCFLAGS+= ${CWARNFLAGS} 128