xref: /freebsd/share/mk/bsd.sys.mk (revision b0b1dbdd) 
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} >= 30400
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.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
79CWARNFLAGS.clang+=	-Wno-unused-local-typedef
80.endif
81.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 40000
82CWARNFLAGS.clang+=	-Wno-address-of-packed-member
83.endif
84.endif # WARNS <= 3
85.if ${WARNS} <= 2
86CWARNFLAGS.clang+=	-Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
87.endif # WARNS <= 2
88.if ${WARNS} <= 1
89CWARNFLAGS.clang+=	-Wno-parentheses
90.endif # WARNS <= 1
91.if defined(NO_WARRAY_BOUNDS)
92CWARNFLAGS.clang+=	-Wno-array-bounds
93.endif # NO_WARRAY_BOUNDS
94.endif # WARNS
95
96.if defined(FORMAT_AUDIT)
97WFORMAT=	1
98.endif # FORMAT_AUDIT
99.if defined(WFORMAT)
100.if ${WFORMAT} > 0
101#CWARNFLAGS+=	-Wformat-nonliteral -Wformat-security -Wno-format-extra-args
102CWARNFLAGS+=	-Wformat=2 -Wno-format-extra-args
103.if ${WARNS} <= 3
104CWARNFLAGS.clang+=	-Wno-format-nonliteral
105.endif # WARNS <= 3
106.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
107CWARNFLAGS+=	-Werror
108.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
109.endif # WFORMAT > 0
110.endif # WFORMAT
111.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE})
112CWARNFLAGS+=	-Wno-format
113.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE}
114
115# GCC 5.2.0
116.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200
117CWARNFLAGS+=	-Wno-error=address			\
118		-Wno-error=array-bounds			\
119		-Wno-error=attributes			\
120		-Wno-error=bool-compare			\
121		-Wno-error=cast-align			\
122		-Wno-error=clobbered			\
123		-Wno-error=enum-compare			\
124		-Wno-error=extra			\
125		-Wno-error=inline			\
126		-Wno-error=logical-not-parentheses	\
127		-Wno-error=strict-aliasing		\
128		-Wno-error=uninitialized		\
129		-Wno-error=unused-but-set-variable	\
130		-Wno-error=unused-function		\
131		-Wno-error=unused-value
132.endif
133
134# GCC 5.3.0
135.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50300
136CWARNFLAGS+=	-Wno-error=strict-overflow
137.endif
138
139# GCC 6.1.0
140.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100
141CWARNFLAGS+=	-Wno-error=misleading-indentation	\
142		-Wno-error=nonnull-compare		\
143		-Wno-error=shift-negative-value		\
144		-Wno-error=tautological-compare		\
145		-Wno-error=unused-const-variable
146.endif
147
148# How to handle FreeBSD custom printf format specifiers.
149.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
150FORMAT_EXTENSIONS=	-D__printf__=__freebsd_kprintf__
151.else
152FORMAT_EXTENSIONS=	-fformat-extensions
153.endif
154
155.if defined(IGNORE_PRAGMA)
156CWARNFLAGS+=	-Wno-unknown-pragmas
157.endif # IGNORE_PRAGMA
158
159# We need this conditional because many places that use it
160# only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}.
161# unconditionally, and can't easily use the CFLAGS.clang=
162# mechanism.
163.if ${COMPILER_TYPE} == "clang"
164CLANG_NO_IAS=	 -no-integrated-as
165.endif
166CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
167		 -mllvm -simplifycfg-dup-ret
168.if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700
169CLANG_OPT_SMALL+= -mllvm -enable-gvn=false
170.else
171CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
172.endif
173CFLAGS.clang+=	 -Qunused-arguments
174.if ${MACHINE_CPUARCH} == "sparc64"
175# Don't emit .cfi directives, since we must use GNU as on sparc64, for now.
176CFLAGS.clang+=	 -fno-dwarf2-cfi-asm
177.endif # SPARC64
178# The libc++ headers use c++11 extensions.  These are normally silenced because
179# they are treated as system headers, but we explicitly disable that warning
180# suppression when building the base system to catch bugs in our headers.
181# Eventually we'll want to start building the base system C++ code as C++11,
182# but not yet.
183CXXFLAGS.clang+=	 -Wno-c++11-extensions
184
185.if ${MK_SSP} != "no" && \
186    ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
187.if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \
188    (${COMPILER_TYPE} == "gcc" && \
189     (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900))
190# Don't use -Wstack-protector as it breaks world with -Werror.
191SSP_CFLAGS?=	-fstack-protector-strong
192.else
193SSP_CFLAGS?=	-fstack-protector
194.endif
195CFLAGS+=	${SSP_CFLAGS}
196.endif # SSP && !ARM && !MIPS
197
198# Allow user-specified additional warning flags, plus compiler and file
199# specific flag overrides, unless we've overriden this...
200.if ${MK_WARNS} != "no"
201CFLAGS+=	${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}}
202CFLAGS+=	${CWARNFLAGS.${.IMPSRC:T}}
203.endif
204
205CFLAGS+=	 ${CFLAGS.${COMPILER_TYPE}}
206CXXFLAGS+=	 ${CXXFLAGS.${COMPILER_TYPE}}
207
208AFLAGS+=	${AFLAGS.${.IMPSRC:T}}
209ACFLAGS+=	${ACFLAGS.${.IMPSRC:T}}
210CFLAGS+=	${CFLAGS.${.IMPSRC:T}}
211CXXFLAGS+=	${CXXFLAGS.${.IMPSRC:T}}
212
213.if defined(SRCTOP)
214# Prevent rebuilding during install to support read-only objdirs.
215.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta)
216CFLAGS+=	ERROR-tried-to-rebuild-during-make-install
217.endif
218.endif
219
220# Tell bmake not to mistake standard targets for things to be searched for
221# or expect to ever be up-to-date.
222PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \
223		beforelinking build build-tools buildconfig buildfiles \
224		buildincludes check checkdpadd clean cleandepend cleandir \
225		cleanobj configure depend distclean distribute exe \
226		files html includes install installconfig installfiles \
227		installincludes lint obj objlink objs objwarn \
228		realinstall tags whereobj
229
230# we don't want ${PROG} to be PHONY
231.PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
232.NOTMAIN: ${PHONY_NOTMAIN:Nall}
233
234.if ${MK_STAGING} != "no"
235.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*))
236_SKIP_STAGING?= yes
237.endif
238.if ${_SKIP_STAGING:Uno} == "yes"
239staging stage_libs stage_files stage_as stage_links stage_symlinks:
240.else
241# allow targets like beforeinstall to be leveraged
242DESTDIR= ${STAGE_OBJTOP}
243.export DESTDIR
244
245.if target(beforeinstall)
246.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
247staging: beforeinstall
248.endif
249.endif
250
251# normally only libs and includes are staged
252.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)
253STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
254
255.if !empty(PROG)
256.if defined(PROGNAME)
257STAGE_AS_SETS+= prog
258STAGE_AS_${PROG}= ${PROGNAME}
259stage_as.prog: ${PROG}
260.else
261STAGE_SETS+= prog
262stage_files.prog: ${PROG}
263STAGE_TARGETS+= stage_files
264.endif
265.endif
266.endif
267
268.if !empty(_LIBS) && !defined(INTERNALLIB)
269.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
270STAGE_SETS+= shlib
271STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
272STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
273stage_files.shlib: ${_LIBS:M*.so.*}
274.endif
275
276.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
277STAGE_AS_SETS+= ldscript
278STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
279stage_as.ldscript: ${SHLIB_LINK:R}.ld
280STAGE_DIR.ldscript = ${STAGE_LIBDIR}
281STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
282NO_SHLIB_LINKS=
283.endif
284
285.if target(stage_files.shlib)
286stage_libs: ${_LIBS}
287.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
288stage_files.shlib: ${SHLIB_NAME}.symbols
289.endif
290.else
291stage_libs: ${_LIBS}
292.endif
293.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
294stage_libs: ${SHLIB_NAME}.symbols
295.endif
296
297.endif
298
299.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
300.if !defined(NO_BEFOREBUILD_INCLUDES)
301stage_includes: buildincludes
302beforebuild: stage_includes
303.endif
304.endif
305
306.for t in stage_libs stage_files stage_as
307.if target($t)
308STAGE_TARGETS+= $t
309.endif
310.endfor
311
312.if !empty(STAGE_AS_SETS)
313STAGE_TARGETS+= stage_as
314.endif
315
316.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
317
318.if !empty(LINKS)
319STAGE_TARGETS+= stage_links
320.if ${MAKE_VERSION} < 20131001
321stage_links.links: ${_LIBS} ${PROG}
322.endif
323STAGE_SETS+= links
324STAGE_LINKS.links= ${LINKS}
325.endif
326
327.if !empty(SYMLINKS)
328STAGE_TARGETS+= stage_symlinks
329STAGE_SETS+= links
330STAGE_SYMLINKS.links= ${SYMLINKS}
331.endif
332
333.endif
334
335.include <meta.stage.mk>
336.endif
337.endif
338
339.if defined(META_TARGETS)
340.for _tgt in ${META_TARGETS}
341.if target(${_tgt})
342${_tgt}: ${META_DEPS}
343.endif
344.endfor
345.endif
346