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.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.endif # WARNS <= 6 74.if ${WARNS} <= 3 75CWARNFLAGS+= -Wno-tautological-compare -Wno-unused-value\ 76 -Wno-parentheses-equality -Wno-unused-function -Wno-conversion 77.endif # WARNS <= 3 78.if ${WARNS} <= 2 79CWARNFLAGS+= -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter 80.endif # WARNS <= 2 81.if ${WARNS} <= 1 82CWARNFLAGS+= -Wno-parentheses 83.endif # WARNS <= 1 84.if defined(NO_WARRAY_BOUNDS) 85CWARNFLAGS+= -Wno-array-bounds 86.endif # NO_WARRAY_BOUNDS 87.endif # CLANG 88.endif # WARNS 89 90.if defined(FORMAT_AUDIT) 91WFORMAT= 1 92.endif # FORMAT_AUDIT 93.if defined(WFORMAT) 94.if ${WFORMAT} > 0 95#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 96CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 97.if ${COMPILER_TYPE} == "clang" && !defined(EARLY_BUILD) 98.if ${WARNS} <= 3 99CWARNFLAGS+= -Wno-format-nonliteral 100.endif # WARNS <= 3 101.endif # CLANG 102.if !defined(NO_WERROR) && (${COMPILER_TYPE} != "clang" \ 103 || !defined(NO_WERROR.clang)) 104CWARNFLAGS+= -Werror 105.endif # !NO_WERROR && (!CLANG || !NO_WERROR.clang) 106.endif # WFORMAT > 0 107.endif # WFORMAT 108.if defined(NO_WFORMAT) || (${COMPILER_TYPE} == "clang" && defined(NO_WFORMAT.clang)) 109CWARNFLAGS+= -Wno-format 110.endif # NO_WFORMAT || (CLANG && NO_WFORMAT.clang) 111.endif # !NO_WARNS 112 113.if defined(IGNORE_PRAGMA) 114CWARNFLAGS+= -Wno-unknown-pragmas 115.endif # IGNORE_PRAGMA 116 117.if ${COMPILER_TYPE} == "clang" && !defined(EARLY_BUILD) 118CLANG_NO_IAS= -no-integrated-as 119CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\ 120 -mllvm -enable-load-pre=false -mllvm -simplifycfg-dup-ret 121CFLAGS+= -Qunused-arguments 122.endif # CLANG 123 124.if ${MK_SSP} != "no" && ${MACHINE_CPUARCH} != "ia64" && \ 125 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 126# Don't use -Wstack-protector as it breaks world with -Werror. 127SSP_CFLAGS?= -fstack-protector 128CFLAGS+= ${SSP_CFLAGS} 129.endif # SSP && !IA64 && !ARM && !MIPS 130 131# Allow user-specified additional warning flags 132CFLAGS+= ${CWARNFLAGS} 133 134 135# Tell bmake not to mistake standard targets for things to be searched for 136# or expect to ever be up-to-date. 137PHONY_NOTMAIN = afterdepend afterinstall all beforedepend beforeinstall \ 138 beforelinking build build-tools buildfiles buildincludes \ 139 checkdpadd clean cleandepend cleandir cleanobj configure \ 140 depend dependall distclean distribute exe extract fetch \ 141 html includes install installfiles installincludes lint \ 142 obj objlink objs objwarn patch realall realdepend \ 143 realinstall regress subdir-all subdir-depend subdir-install \ 144 tags whereobj 145 146.PHONY: ${PHONY_NOTMAIN} 147.NOTMAIN: ${PHONY_NOTMAIN} 148