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 MK_WARNS=no. 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# -pedantic is problematic because it also imposes namespace restrictions 28#CFLAGS+= -pedantic 29.if defined(WARNS) 30.if ${WARNS} >= 1 31CWARNFLAGS+= -Wsystem-headers 32.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE}) 33CWARNFLAGS+= -Werror 34.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE} 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 ${WARNS} >= 4 44CWARNFLAGS+= -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\ 45 -Wunused-parameter 46.if !defined(NO_WCAST_ALIGN) && !defined(NO_WCAST_ALIGN.${COMPILER_TYPE}) 47CWARNFLAGS+= -Wcast-align 48.endif # !NO_WCAST_ALIGN !NO_WCAST_ALIGN.${COMPILER_TYPE} 49.endif # WARNS >= 4 50# BDECFLAGS 51.if ${WARNS} >= 6 52CWARNFLAGS+= -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\ 53 -Wold-style-definition 54.if !defined(NO_WMISSING_VARIABLE_DECLARATIONS) 55CWARNFLAGS.clang+= -Wmissing-variable-declarations 56.endif 57.if !defined(NO_WTHREAD_SAFETY) 58CWARNFLAGS.clang+= -Wthread-safety 59.endif 60.endif # WARNS >= 6 61.if ${WARNS} >= 2 && ${WARNS} <= 4 62# XXX Delete -Wuninitialized by default for now -- the compiler doesn't 63# XXX always get it right. 64CWARNFLAGS+= -Wno-uninitialized 65.endif # WARNS >=2 && WARNS <= 4 66CWARNFLAGS+= -Wno-pointer-sign 67# Clang has more warnings enabled by default, and when using -Wall, so if WARNS 68# is set to low values, these have to be disabled explicitly. 69.if ${WARNS} <= 6 70CWARNFLAGS.clang+= -Wno-empty-body -Wno-string-plus-int 71.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} > 30300 72CWARNFLAGS.clang+= -Wno-unused-const-variable 73.endif 74.endif # WARNS <= 6 75.if ${WARNS} <= 3 76CWARNFLAGS.clang+= -Wno-tautological-compare -Wno-unused-value\ 77 -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion 78.endif # WARNS <= 3 79.if ${WARNS} <= 2 80CWARNFLAGS.clang+= -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter 81.endif # WARNS <= 2 82.if ${WARNS} <= 1 83CWARNFLAGS.clang+= -Wno-parentheses 84.endif # WARNS <= 1 85.if defined(NO_WARRAY_BOUNDS) 86CWARNFLAGS.clang+= -Wno-array-bounds 87.endif # NO_WARRAY_BOUNDS 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 ${WARNS} <= 3 98CWARNFLAGS.clang+= -Wno-format-nonliteral 99.endif # WARNS <= 3 100.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE}) 101CWARNFLAGS+= -Werror 102.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE} 103.endif # WFORMAT > 0 104.endif # WFORMAT 105.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE}) 106CWARNFLAGS+= -Wno-format 107.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE} 108 109.if defined(IGNORE_PRAGMA) 110CWARNFLAGS+= -Wno-unknown-pragmas 111.endif # IGNORE_PRAGMA 112 113# We need this conditional because many places that use it 114# only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}. 115# unconditionally, and can't easily use the CFLAGS.clang= 116# mechanism. 117.if ${COMPILER_TYPE} == "clang" 118CLANG_NO_IAS= -no-integrated-as 119.endif 120CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\ 121 -mllvm -simplifycfg-dup-ret -mllvm -enable-gvn=false 122CFLAGS.clang+= -Qunused-arguments 123.if ${MACHINE_CPUARCH} == "sparc64" 124# Don't emit .cfi directives, since we must use GNU as on sparc64, for now. 125CFLAGS.clang+= -fno-dwarf2-cfi-asm 126.endif # SPARC64 127# The libc++ headers use c++11 extensions. These are normally silenced because 128# they are treated as system headers, but we explicitly disable that warning 129# suppression when building the base system to catch bugs in our headers. 130# Eventually we'll want to start building the base system C++ code as C++11, 131# but not yet. 132CXXFLAGS.clang+= -Wno-c++11-extensions 133 134.if ${MK_SSP} != "no" && \ 135 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips" 136# Don't use -Wstack-protector as it breaks world with -Werror. 137SSP_CFLAGS?= -fstack-protector 138CFLAGS+= ${SSP_CFLAGS} 139.endif # SSP && !ARM && !MIPS 140 141# Allow user-specified additional warning flags, plus compiler specific flag overrides. 142# Unless we've overriden this... 143.if ${MK_WARNS} != "no" 144CFLAGS+= ${CWARNFLAGS} ${CWARNFLAGS.${COMPILER_TYPE}} 145.endif 146 147CFLAGS+= ${CFLAGS.${COMPILER_TYPE}} 148CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}} 149 150# Tell bmake not to mistake standard targets for things to be searched for 151# or expect to ever be up-to-date. 152PHONY_NOTMAIN = afterdepend afterinstall all beforedepend beforeinstall \ 153 beforelinking build build-tools buildfiles buildincludes \ 154 checkdpadd clean cleandepend cleandir cleanobj configure \ 155 depend dependall distclean distribute exe \ 156 html includes install installfiles installincludes lint \ 157 obj objlink objs objwarn realall realdepend \ 158 realinstall regress subdir-all subdir-depend subdir-install \ 159 tags whereobj 160 161.PHONY: ${PHONY_NOTMAIN} 162.NOTMAIN: ${PHONY_NOTMAIN} 163