bsd.sys.mk: Set -Werror only for compilers that have the warnings fixed.
[dragonfly.git] / share / mk / bsd.sys.mk
1 # $FreeBSD: src/share/mk/bsd.sys.mk,v 1.3.2.5 2002/07/03 16:59:14 des Exp $
2 #
3 # This file contains common settings used for building DragonFly
4 # sources.
5
6 CSTD?=  gnu99
7
8 .if ${CSTD} == "k&r"
9 CFLAGS          += -traditional
10 .elif ${CSTD} == "c89" || ${CSTD} == "c90"
11 CFLAGS          += -std=iso9899:1990
12 .elif ${CSTD} == "c94" || ${CSTD} == "c95"
13 CFLAGS          += -std=iso9899:199409
14 .elif ${CSTD} == "c99"
15 CFLAGS          += -std=iso9899:1999
16 .else
17 CFLAGS          += -std=${CSTD}
18 .endif
19
20 # Enable various levels of compiler warning checks.  These may be
21 # overridden (e.g. if using a non-gcc compiler) by defining NO_WARNS.
22
23 .if !defined(NO_WARNS)
24 . if defined(WARNS)
25 .  if ${WARNS} >= 1
26 CWARNFLAGS      +=      -Wmissing-include-dirs -Wsystem-headers
27 .   if !defined(NO_WERROR) && (${CCVER} == "gcc47" || ${CCVER} == "gcc50")
28 CWARNFLAGS      +=      -Werror
29 .   endif
30 .  endif
31 .  if ${WARNS} >= 2
32 CWARNFLAGS      +=      -Wall -Wformat-security -Winit-self -Wno-pointer-sign
33 .  endif
34 .  if ${WARNS} >= 3
35 CWARNFLAGS      +=      -Wextra -Wno-unused-parameter -Wstrict-prototypes\
36                         -Wmissing-prototypes -Wpointer-arith\
37                         -Wold-style-definition
38 .  endif
39 .  if ${WARNS} >= 4
40 CWARNFLAGS      +=      -Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch\
41                         -Wshadow -Wcast-align -Wunused-parameter
42 .  endif
43 .  if ${WARNS} >= 6
44 CWARNFLAGS      +=      -Wchar-subscripts -Winline -Wnested-externs\
45                         -Wredundant-decls
46 .  endif
47 .  if ${WARNS} >= 2 && ${WARNS} <= 4
48 # XXX Delete -Wmaybe-uninitialized by default for now -- the compiler doesn't
49 # XXX always get it right.
50 .   if ${CCVER:Mgcc*}
51 CWARNFLAGS      +=      -Wno-maybe-uninitialized
52 .   else
53 CWARNFLAGS      +=      -Wno-uninitialized
54 .   endif
55 .  endif
56 # Activate gcc47's -Wunused-but-set-variable (which is in -Wall) and
57 # -Wunused-but-set-parameter (which is in -Wextra) only at WARNS >= 4
58 # (which is the level when also -Wunused-parameter comes into play).
59 .  if ${WARNS} >= 2 && ${WARNS} <= 3 && ${CCVER:Mgcc*}
60 CWARNFLAGS      +=      -Wno-unused-but-set-variable
61 .  endif
62 .  if ${WARNS} == 3 && ${CCVER:Mgcc*}
63 CWARNFLAGS      +=      -Wno-unused-but-set-parameter
64 .  endif
65 .  if ${WARNS} == 3 && (${CCVER:Mgcc49} || ${CCVER:Mgcc[5-]*})
66 CWARNFLAGS      +=      -Wno-unused-value
67 .  endif
68 .  if ${WARNS} >= 2 && ${CCVER:Mgcc4[789]}
69 CWARNFLAGS      +=      -Wno-error=maybe-uninitialized\
70                         -Wno-error=uninitialized\
71                         -Wno-error=shadow
72 .  endif
73 # Disable -Werror selectively for -Os and -Og compilations.  Both -Winline and
74 # -Wmaybe-uninitialized are noisy and should be caught by standard -O and -O2.
75 # These are still useful diagnostics while investigating compilation issues.
76 .  if defined(WORLD_CCOPTLEVEL) && (${WORLD_CCOPTLEVEL:Mg} || ${WORLD_CCOPTLEVEL:Ms})
77 .   if ${WARNS} >= 6
78 CWARNFLAGS      +=      -Wno-error=inline
79 .   endif
80 .   if ${WARNS} >= 5 && ${CCVER:Mgcc*}
81 CWARNFLAGS      +=      -Wno-error=maybe-uninitialized
82 .   endif
83 .  endif
84 . endif
85
86 . if defined(FORMAT_AUDIT)
87 WFORMAT         =       1
88 . endif
89 . if defined(WFORMAT)
90 .  if ${WFORMAT} > 0
91 CWARNFLAGS      +=      -Wformat=2 -Wno-format-extra-args
92 .   if !defined(NO_WERROR) && (${CCVER} == "gcc47" || ${CCVER} == "gcc50")
93 CWARNFLAGS      +=      -Werror
94 .   endif
95 .  endif
96 . endif
97 .endif
98
99 .if defined(NO_WARRAY_BOUNDS)
100 CWARNFLAGS      +=      -Wno-array-bounds
101 .endif
102 .if defined(NO_STRICT_OVERFLOW)
103 CFLAGS          +=      -fno-strict-overflow
104 .endif
105 .if defined(NO_STRICT_ALIASING)
106 CFLAGS          +=      -fno-strict-aliasing
107 .endif
108
109
110 # Allow user-specified additional warning flags
111 CFLAGS          +=      ${CWARNFLAGS}
112
113 # Tell bmake not to mistake standard targets for things to be searched for
114 # or expect to ever be up-to-date
115 PHONY_NOTMAIN = afterdepend afterinstall all beforedepend beforeinstall \
116         beforelinking build build-tools buildfiles buildincludes \
117         checkdpadd clean cleandepend cleandir cleanobj configure \
118         depend dependall distclean distribute exe extract fetch \
119         html includes install installfiles installincludes lint \
120         obj objlink objs objwarn patch realall realdepend \
121         realinstall regress subdir-all subdir-depend subdir-install \
122         tags whereobj
123
124 # if given PROG matches anything in the PHONY list, exclude it.
125 .PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
126 .NOTMAIN: ${PHONY_NOTMAIN}