xref: /freebsd/share/mk/bsd.sys.mk (revision 58a0f0d00c0cc4a90ce584a61470290751bfcac7) 
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 6.1.0
135.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100
136CWARNFLAGS+=	-Wno-error=misleading-indentation	\
137		-Wno-error=nonnull-compare		\
138		-Wno-error=shift-negative-value		\
139		-Wno-error=tautological-compare		\
140		-Wno-error=unused-const-variable
141.endif
142
143# GCC 7.1.0
144.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 70100
145CWARNFLAGS+=	-Wno-error=deprecated			\
146		-Wno-error=pointer-compare		\
147		-Wno-error=format-truncation		\
148		-Wno-error=implicit-fallthrough		\
149		-Wno-error=expansion-to-defined		\
150		-Wno-error=int-in-bool-context		\
151		-Wno-error=bool-operation		\
152		-Wno-error=format-overflow		\
153		-Wno-error=stringop-overflow		\
154		-Wno-error=memset-elt-size		\
155		-Wno-error=int-in-bool-context		\
156		-Wno-error=unused-const-variable	\
157		-Wno-error=nonnull
158.endif
159
160# How to handle FreeBSD custom printf format specifiers.
161.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
162FORMAT_EXTENSIONS=	-D__printf__=__freebsd_kprintf__
163.else
164FORMAT_EXTENSIONS=	-fformat-extensions
165.endif
166
167.if defined(IGNORE_PRAGMA)
168CWARNFLAGS+=	-Wno-unknown-pragmas
169.endif # IGNORE_PRAGMA
170
171# We need this conditional because many places that use it
172# only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}.
173# unconditionally, and can't easily use the CFLAGS.clang=
174# mechanism.
175.if ${COMPILER_TYPE} == "clang"
176CLANG_NO_IAS=	 -no-integrated-as
177.endif
178CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
179		 -mllvm -simplifycfg-dup-ret
180.if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700
181CLANG_OPT_SMALL+= -mllvm -enable-gvn=false
182.else
183CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
184.endif
185CFLAGS.clang+=	 -Qunused-arguments
186.if ${MACHINE_CPUARCH} == "sparc64"
187# Don't emit .cfi directives, since we must use GNU as on sparc64, for now.
188CFLAGS.clang+=	 -fno-dwarf2-cfi-asm
189.endif # SPARC64
190# The libc++ headers use c++11 extensions.  These are normally silenced because
191# they are treated as system headers, but we explicitly disable that warning
192# suppression when building the base system to catch bugs in our headers.
193# Eventually we'll want to start building the base system C++ code as C++11,
194# but not yet.
195CXXFLAGS.clang+=	 -Wno-c++11-extensions
196
197.if ${MK_SSP} != "no" && \
198    ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
199.if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \
200    (${COMPILER_TYPE} == "gcc" && \
201     (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900))
202# Don't use -Wstack-protector as it breaks world with -Werror.
203SSP_CFLAGS?=	-fstack-protector-strong
204.else
205SSP_CFLAGS?=	-fstack-protector
206.endif
207CFLAGS+=	${SSP_CFLAGS}
208.endif # SSP && !ARM && !MIPS
209
210# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is
211# enabled.
212DEBUG_FILES_CFLAGS?= -g
213
214# Allow user-specified additional warning flags, plus compiler and file
215# specific flag overrides, unless we've overriden this...
216.if ${MK_WARNS} != "no"
217CFLAGS+=	${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}}
218CFLAGS+=	${CWARNFLAGS.${.IMPSRC:T}}
219.endif
220
221CFLAGS+=	 ${CFLAGS.${COMPILER_TYPE}}
222CXXFLAGS+=	 ${CXXFLAGS.${COMPILER_TYPE}}
223
224AFLAGS+=	${AFLAGS.${.IMPSRC:T}}
225ACFLAGS+=	${ACFLAGS.${.IMPSRC:T}}
226CFLAGS+=	${CFLAGS.${.IMPSRC:T}}
227CXXFLAGS+=	${CXXFLAGS.${.IMPSRC:T}}
228
229LDFLAGS+=	${LDFLAGS.${LINKER_TYPE}}
230
231.if defined(SRCTOP)
232# Prevent rebuilding during install to support read-only objdirs.
233.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta)
234CFLAGS+=	ERROR-tried-to-rebuild-during-make-install
235.endif
236.endif
237
238# Tell bmake not to mistake standard targets for things to be searched for
239# or expect to ever be up-to-date.
240PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \
241		beforelinking build build-tools buildconfig buildfiles \
242		buildincludes check checkdpadd clean cleandepend cleandir \
243		cleanobj configure depend distclean distribute exe \
244		files html includes install installconfig installfiles \
245		installincludes lint obj objlink objs objwarn \
246		realinstall tags whereobj
247
248# we don't want ${PROG} to be PHONY
249.PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
250.NOTMAIN: ${PHONY_NOTMAIN:Nall}
251
252.if ${MK_STAGING} != "no"
253.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*))
254_SKIP_STAGING?= yes
255.endif
256.if ${_SKIP_STAGING:Uno} == "yes"
257staging stage_libs stage_files stage_as stage_links stage_symlinks:
258.else
259# allow targets like beforeinstall to be leveraged
260DESTDIR= ${STAGE_OBJTOP}
261.export DESTDIR
262
263.if target(beforeinstall)
264.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
265staging: beforeinstall
266.endif
267.endif
268
269# normally only libs and includes are staged
270.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)
271STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
272
273.if !empty(PROG)
274.if defined(PROGNAME)
275STAGE_AS_SETS+= prog
276STAGE_AS_${PROG}= ${PROGNAME}
277stage_as.prog: ${PROG}
278.else
279STAGE_SETS+= prog
280stage_files.prog: ${PROG}
281STAGE_TARGETS+= stage_files
282.endif
283.endif
284.endif
285
286.if !empty(_LIBS) && !defined(INTERNALLIB)
287.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
288STAGE_SETS+= shlib
289STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
290STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
291stage_files.shlib: ${_LIBS:M*.so.*}
292.endif
293
294.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
295STAGE_AS_SETS+= ldscript
296STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
297stage_as.ldscript: ${SHLIB_LINK:R}.ld
298STAGE_DIR.ldscript = ${STAGE_LIBDIR}
299STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
300NO_SHLIB_LINKS=
301.endif
302
303.if target(stage_files.shlib)
304stage_libs: ${_LIBS}
305.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
306stage_files.shlib: ${SHLIB_NAME}.symbols
307.endif
308.else
309stage_libs: ${_LIBS}
310.endif
311.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
312stage_libs: ${SHLIB_NAME}.symbols
313.endif
314
315.endif
316
317.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
318.if !defined(NO_BEFOREBUILD_INCLUDES)
319stage_includes: buildincludes
320beforebuild: stage_includes
321.endif
322.endif
323
324.for t in stage_libs stage_files stage_as
325.if target($t)
326STAGE_TARGETS+= $t
327.endif
328.endfor
329
330.if !empty(STAGE_AS_SETS)
331STAGE_TARGETS+= stage_as
332.endif
333
334.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
335
336.if !empty(LINKS)
337STAGE_TARGETS+= stage_links
338.if ${MAKE_VERSION} < 20131001
339stage_links.links: ${_LIBS} ${PROG}
340.endif
341STAGE_SETS+= links
342STAGE_LINKS.links= ${LINKS}
343.endif
344
345.if !empty(SYMLINKS)
346STAGE_TARGETS+= stage_symlinks
347STAGE_SETS+= links
348STAGE_SYMLINKS.links= ${SYMLINKS}
349.endif
350
351.endif
352
353.include <meta.stage.mk>
354.endif
355.endif
356
357.if defined(META_TARGETS)
358.for _tgt in ${META_TARGETS}
359.if target(${_tgt})
360${_tgt}: ${META_DEPS}
361.endif
362.endfor
363.endif
364