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} <= 3 66CWARNFLAGS+= -Wno-tautological-compare -Wno-unused-value\ 67 -Wno-parentheses-equality -Wno-unused-function -Wno-conversion 68.endif # WARNS <= 3 69.if ${WARNS} <= 2 70CWARNFLAGS+= -Wno-switch-enum -Wno-empty-body 71.endif # WARNS <= 2 72.if ${WARNS} <= 1 73CWARNFLAGS+= -Wno-parentheses 74.endif # WARNS <= 1 75.if defined(NO_WARRAY_BOUNDS) 76CWARNFLAGS+= -Wno-array-bounds 77.endif # NO_WARRAY_BOUNDS 78.endif # CLANG 79.endif # WARNS 80 81.if defined(FORMAT_AUDIT) 82WFORMAT= 1 83.endif # FORMAT_AUDIT 84.if defined(WFORMAT) 85.if ${WFORMAT} > 0 86#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 87CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 88.if !defined(NO_WERROR) && ((${MK_CLANG_IS_CC} == "no" && \ 89 ${CC:T:Mclang} != "clang") || !defined(NO_WERROR.clang)) 90CWARNFLAGS+= -Werror 91.endif # !NO_WERROR && (!CLANG || !NO_WERROR.clang) 92.endif # WFORMAT > 0 93.endif # WFORMAT 94.if defined(NO_WFORMAT) || ((${MK_CLANG_IS_CC} != "no" || \ 95 ${CC:T:Mclang} == "clang") && defined(NO_WFORMAT.clang)) 96CWARNFLAGS+= -Wno-format 97.endif # NO_WFORMAT || (CLANG && NO_WFORMAT.clang) 98.endif # !NO_WARNS 99 100.if defined(IGNORE_PRAGMA) 101CWARNFLAGS+= -Wno-unknown-pragmas 102.endif # IGNORE_PRAGMA 103 104.if ${MK_CLANG_IS_CC} != "no" || ${CC:T:Mclang} == "clang" 105CLANG_NO_IAS= -no-integrated-as 106CLANG_OPT_SMALL= -mllvm -stack-alignment=8 -mllvm -inline-threshold=3\ 107 -mllvm -enable-load-pre=false -mllvm -simplifycfg-dup-ret 108.endif # CLANG 109 110.if ${MK_SSP} != "no" && ${MACHINE_CPUARCH} != "ia64" && \ 111 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 112# Don't use -Wstack-protector as it breaks world with -Werror. 113SSP_CFLAGS?= -fstack-protector 114CFLAGS+= ${SSP_CFLAGS} 115.endif # SSP && !IA64 && !ARM && !MIPS 116 117# Allow user-specified additional warning flags 118CFLAGS+= ${CWARNFLAGS} 119