3 # This file contains common settings used for building FreeBSD
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.
9 # for GCC: http://gcc.gnu.org/onlinedocs/gcc-4.2.1/gcc/Warning-Options.html
11 .include <bsd.compiler.mk>
13 # the default is gnu99 for now
18 .elif ${CSTD} == "c89" || ${CSTD} == "c90"
19 CFLAGS+= -std=iso9899:1990
20 .elif ${CSTD} == "c94" || ${CSTD} == "c95"
21 CFLAGS+= -std=iso9899:199409
22 .elif ${CSTD} == "c99"
23 CFLAGS+= -std=iso9899:1999
27 # -pedantic is problematic because it also imposes namespace restrictions
31 CWARNFLAGS+= -Wsystem-headers
32 .if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
34 .endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
37 CWARNFLAGS+= -Wall -Wno-format-y2k
40 CWARNFLAGS+= -W -Wno-unused-parameter -Wstrict-prototypes\
41 -Wmissing-prototypes -Wpointer-arith
44 CWARNFLAGS+= -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\
46 .if !defined(NO_WCAST_ALIGN) && !defined(NO_WCAST_ALIGN.${COMPILER_TYPE})
47 CWARNFLAGS+= -Wcast-align
48 .endif # !NO_WCAST_ALIGN !NO_WCAST_ALIGN.${COMPILER_TYPE}
52 CWARNFLAGS+= -Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\
53 -Wold-style-definition
54 .if !defined(NO_WMISSING_VARIABLE_DECLARATIONS)
55 CWARNFLAGS.clang+= -Wmissing-variable-declarations
58 .if ${WARNS} >= 2 && ${WARNS} <= 4
59 # XXX Delete -Wuninitialized by default for now -- the compiler doesn't
60 # XXX always get it right.
61 CWARNFLAGS+= -Wno-uninitialized
62 .endif # WARNS >=2 && WARNS <= 4
63 CWARNFLAGS+= -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.
67 CWARNFLAGS.clang+= -Wno-empty-body -Wno-string-plus-int
68 .if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} > 30300
69 CWARNFLAGS.clang+= -Wno-unused-const-variable
73 CWARNFLAGS.clang+= -Wno-tautological-compare -Wno-unused-value\
74 -Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion
77 CWARNFLAGS.clang+= -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
80 CWARNFLAGS.clang+= -Wno-parentheses
82 .if defined(NO_WARRAY_BOUNDS)
83 CWARNFLAGS.clang+= -Wno-array-bounds
84 .endif # NO_WARRAY_BOUNDS
87 .if defined(FORMAT_AUDIT)
92 #CWARNFLAGS+= -Wformat-nonliteral -Wformat-security -Wno-format-extra-args
93 CWARNFLAGS+= -Wformat=2 -Wno-format-extra-args
95 CWARNFLAGS.clang+= -Wno-format-nonliteral
97 .if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
99 .endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
102 .if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE})
103 CWARNFLAGS+= -Wno-format
104 .endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE}
106 .if defined(IGNORE_PRAGMA)
107 CWARNFLAGS+= -Wno-unknown-pragmas
108 .endif # IGNORE_PRAGMA
110 .if ${COMPILER_TYPE} == "clang"
111 # Would love to do this unconditionally, but can't due to its use in
112 # kernel build coupled with CFLAGS.${TARGET} feature
113 CLANG_NO_IAS= -no-integrated-as
115 CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
116 -mllvm -enable-load-pre=false -mllvm -simplifycfg-dup-ret
117 CFLAGS.clang+= -Qunused-arguments
118 .if ${MACHINE_CPUARCH} == "sparc64"
119 # Don't emit .cfi directives, since we must use GNU as on sparc64, for now.
120 CFLAGS.clang+= -fno-dwarf2-cfi-asm
122 # The libc++ headers use c++11 extensions. These are normally silenced because
123 # they are treated as system headers, but we explicitly disable that warning
124 # suppression when building the base system to catch bugs in our headers.
125 # Eventually we'll want to start building the base system C++ code as C++11,
127 CXXFLAGS.clang+= -Wno-c++11-extensions
129 .if ${MK_SSP} != "no" && ${MACHINE_CPUARCH} != "ia64" && \
130 ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
131 # Don't use -Wstack-protector as it breaks world with -Werror.
132 SSP_CFLAGS?= -fstack-protector
133 CFLAGS+= ${SSP_CFLAGS}
134 .endif # SSP && !IA64 && !ARM && !MIPS
136 # Allow user-specified additional warning flags, plus compiler specific flag overrides.
137 # Unless we've overriden this...
138 .if ${MK_WARNS} != "no"
139 CFLAGS+= ${CWARNFLAGS} ${CWARNFLAGS.${COMPILER_TYPE}}
142 CFLAGS+= ${CFLAGS.${COMPILER_TYPE}}
143 CXXFLAGS+= ${CXXFLAGS.${COMPILER_TYPE}}
145 # Tell bmake not to mistake standard targets for things to be searched for
146 # or expect to ever be up-to-date.
147 PHONY_NOTMAIN = afterdepend afterinstall all beforedepend beforeinstall \
148 beforelinking build build-tools buildfiles buildincludes \
149 checkdpadd clean cleandepend cleandir cleanobj configure \
150 depend dependall distclean distribute exe \
151 html includes install installfiles installincludes lint \
152 obj objlink objs objwarn realall realdepend \
153 realinstall regress subdir-all subdir-depend subdir-install \
156 .PHONY: ${PHONY_NOTMAIN}
157 .NOTMAIN: ${PHONY_NOTMAIN}