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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
14 CSTD?=          gnu99
15
16 .if ${CSTD} == "k&r"
17 CFLAGS+=        -traditional
18 .elif ${CSTD} == "c89" || ${CSTD} == "c90"
19 CFLAGS+=        -std=iso9899:1990
20 .elif ${CSTD} == "c94" || ${CSTD} == "c95"
21 CFLAGS+=        -std=iso9899:199409
22 .elif ${CSTD} == "c99"
23 CFLAGS+=        -std=iso9899:1999
24 .else # CSTD
25 CFLAGS+=        -std=${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 ${WARNS} >= 1
32 CWARNFLAGS+=    -Wsystem-headers
33 .if !defined(NO_WERROR) && (${COMPILER_TYPE} != "clang" \
34     || !defined(NO_WERROR.clang))
35 CWARNFLAGS+=    -Werror
36 .endif # !NO_WERROR && (!CLANG || !NO_WERROR.clang)
37 .endif # WARNS >= 1
38 .if ${WARNS} >= 2
39 CWARNFLAGS+=    -Wall -Wno-format-y2k
40 .endif # WARNS >= 2
41 .if ${WARNS} >= 3
42 CWARNFLAGS+=    -W -Wno-unused-parameter -Wstrict-prototypes\
43                 -Wmissing-prototypes -Wpointer-arith
44 .endif # WARNS >= 3
45 .if ${WARNS} >= 4
46 CWARNFLAGS+=    -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\
47                 -Wunused-parameter
48 .if !defined(NO_WCAST_ALIGN) && (${COMPILER_TYPE} != "clang" \
49     || !defined(NO_WCAST_ALIGN.clang))
50 CWARNFLAGS+=    -Wcast-align
51 .endif # !NO_WCAST_ALIGN && (!CLANG || !NO_WCAST_ALIGN.clang)
52 .endif # WARNS >= 4
53 # BDECFLAGS
54 .if ${WARNS} >= 6
55 CWARNFLAGS+=    -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)
59 CWARNFLAGS+=    -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.
65 CWARNFLAGS+=    -Wno-uninitialized
66 .endif # WARNS >=2 && WARNS <= 4
67 CWARNFLAGS+=    -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
72 CWARNFLAGS+=    -Wno-empty-body -Wno-string-plus-int
73 .endif # WARNS <= 6
74 .if ${WARNS} <= 3
75 CWARNFLAGS+=    -Wno-tautological-compare -Wno-unused-value\
76                 -Wno-parentheses-equality -Wno-unused-function -Wno-conversion
77 .endif # WARNS <= 3
78 .if ${WARNS} <= 2
79 CWARNFLAGS+=    -Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
80 .endif # WARNS <= 2
81 .if ${WARNS} <= 1
82 CWARNFLAGS+=    -Wno-parentheses
83 .endif # WARNS <= 1
84 .if defined(NO_WARRAY_BOUNDS)
85 CWARNFLAGS+=    -Wno-array-bounds
86 .endif # NO_WARRAY_BOUNDS
87 .endif # CLANG
88 .endif # WARNS
89
90 .if defined(FORMAT_AUDIT)
91 WFORMAT=        1
92 .endif # FORMAT_AUDIT
93 .if defined(WFORMAT)
94 .if ${WFORMAT} > 0
95 #CWARNFLAGS+=   -Wformat-nonliteral -Wformat-security -Wno-format-extra-args
96 CWARNFLAGS+=    -Wformat=2 -Wno-format-extra-args
97 .if ${COMPILER_TYPE} == "clang" && !defined(EARLY_BUILD)
98 .if ${WARNS} <= 3
99 CWARNFLAGS+=    -Wno-format-nonliteral
100 .endif # WARNS <= 3
101 .endif # CLANG
102 .if !defined(NO_WERROR) && (${COMPILER_TYPE} != "clang" \
103     || !defined(NO_WERROR.clang))
104 CWARNFLAGS+=    -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))
109 CWARNFLAGS+=    -Wno-format
110 .endif # NO_WFORMAT || (CLANG && NO_WFORMAT.clang)
111 .endif # !NO_WARNS
112
113 .if defined(IGNORE_PRAGMA)
114 CWARNFLAGS+=    -Wno-unknown-pragmas
115 .endif # IGNORE_PRAGMA
116
117 .if ${COMPILER_TYPE} == "clang" && !defined(EARLY_BUILD)
118 CLANG_NO_IAS=    -no-integrated-as
119 CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
120                  -mllvm -enable-load-pre=false -mllvm -simplifycfg-dup-ret
121 CFLAGS+=         -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.
127 SSP_CFLAGS?=    -fstack-protector
128 CFLAGS+=        ${SSP_CFLAGS}
129 .endif # SSP && !IA64 && !ARM && !MIPS
130
131 # Allow user-specified additional warning flags
132 CFLAGS+=        ${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.
137 PHONY_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}