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.endif # WARNS >= 6 58.if ${WARNS} >= 2 && ${WARNS} <= 4 59# XXX Delete -Wuninitialized by default for now -- the compiler doesn't 60# XXX always get it right. 61CWARNFLAGS+= -Wno-uninitialized 62.endif # WARNS >=2 && WARNS <= 4 63CWARNFLAGS+= -Wno-pointer-sign 64# Clang has more warnings enabled by default, and when using -Wall, so if WARNS 65# is set to low values, these have to be disabled explicitly. 66.if ${COMPILER_TYPE} == "clang" && !defined(EARLY_BUILD) 67.if ${WARNS} <= 6 68CWARNFLAGS+= -Wno-empty-body -Wno-string-plus-int 69.endif # WARNS <= 6 70.if ${WARNS} <= 3 71CWARNFLAGS+= -Wno-tautological-compare -Wno-unused-value\ 72 -Wno-parentheses-equality -Wno-unused-function -Wno-conversion 73.endif # WARNS <= 3 74.if ${WARNS} <= 2 75CWARNFLAGS+= -Wno-switch -Wno-switch-enum 76.endif # WARNS <= 2 77.if ${WARNS} <= 1 78CWARNFLAGS+= -Wno-parentheses 79.endif # WARNS <= 1 80.if defined(NO_WARRAY_BOUNDS) 81CWARNFLAGS+= -Wno-array-bounds 82.endif # NO_WARRAY_BOUNDS 83.endif # CLANG 84.endif # WARNS 85 86.if defined(FORMAT_AUDIT) 87WFORMAT= 1 88.endif # FORMAT_AUDIT 89.if defined(WFORMAT) 90.if ${WFORMAT} > 0 91#CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args 92CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args 93.if ${COMPILER_TYPE} == "clang" && !defined(EARLY_BUILD) 94.if ${WARNS} <= 3 95CWARNFLAGS+= -Wno-format-nonliteral 96.endif # WARNS <= 3 97.endif # CLANG 98.if !defined(NO_WERROR) && (${COMPILER_TYPE} != "clang" \ 99 || !defined(NO_WERROR.clang)) 100CWARNFLAGS+= -Werror 101.endif # !NO_WERROR && (!CLANG || !NO_WERROR.clang) 102.endif # WFORMAT > 0 103.endif # WFORMAT 104.if defined(NO_WFORMAT) || (${COMPILER_TYPE} == "clang" && defined(NO_WFORMAT.clang)) 105CWARNFLAGS+= -Wno-format 106.endif # NO_WFORMAT || (CLANG && NO_WFORMAT.clang) 107.endif # !NO_WARNS 108 109.if defined(IGNORE_PRAGMA) 110CWARNFLAGS+= -Wno-unknown-pragmas 111.endif # IGNORE_PRAGMA 112 113.if ${COMPILER_TYPE} == "clang" && !defined(EARLY_BUILD) 114CLANG_NO_IAS= -no-integrated-as 115CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\ 116 -mllvm -enable-load-pre=false -mllvm -simplifycfg-dup-ret 117CFLAGS+= -Qunused-arguments 118.endif # CLANG 119 120.if ${MK_SSP} != "no" && ${MACHINE_CPUARCH} != "ia64" && \ 121 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 122# Don't use -Wstack-protector as it breaks world with -Werror. 123SSP_CFLAGS?= -fstack-protector 124CFLAGS+= ${SSP_CFLAGS} 125.endif # SSP && !IA64 && !ARM && !MIPS 126 127# Allow user-specified additional warning flags 128CFLAGS+= ${CWARNFLAGS} 129 130 131# Tell bmake not to mistake standard targets for things to be searched for 132# or expect to ever be up-to-date. 133PHONY_NOTMAIN = afterdepend afterinstall all beforedepend beforeinstall \ 134 beforelinking build build-tools buildfiles buildincludes \ 135 checkdpadd clean cleandepend cleandir cleanobj configure \ 136 depend dependall distclean distribute exe extract fetch \ 137 html includes install installfiles installincludes lint \ 138 obj objlink objs objwarn patch realall realdepend \ 139 realinstall regress subdir-all subdir-depend subdir-install \ 140 tags whereobj 141 142.PHONY: ${PHONY_NOTMAIN} 143.NOTMAIN: ${PHONY_NOTMAIN} 144