bsd.sys.mk revision 259158 
1# $FreeBSD: stable/9/share/mk/bsd.sys.mk 259158 2013-12-10 07:28:26Z dim $
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-enum-conversion
73.endif # WARNS <= 3
74.if ${WARNS} <= 2
75CWARNFLAGS+=	-Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
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