xref: /freebsd/share/mk/bsd.sys.mk (revision 7a0c41d5d7d4e9770ef6f5d56f893efc8f18ab7c) 
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.endif # WARNS <= 3
82.if ${WARNS} <= 2
83CWARNFLAGS.clang+=	-Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
84.endif # WARNS <= 2
85.if ${WARNS} <= 1
86CWARNFLAGS.clang+=	-Wno-parentheses
87.endif # WARNS <= 1
88.if defined(NO_WARRAY_BOUNDS)
89CWARNFLAGS.clang+=	-Wno-array-bounds
90.endif # NO_WARRAY_BOUNDS
91.endif # WARNS
92
93.if defined(FORMAT_AUDIT)
94WFORMAT=	1
95.endif # FORMAT_AUDIT
96.if defined(WFORMAT)
97.if ${WFORMAT} > 0
98#CWARNFLAGS+=	-Wformat-nonliteral -Wformat-security -Wno-format-extra-args
99CWARNFLAGS+=	-Wformat=2 -Wno-format-extra-args
100.if ${WARNS} <= 3
101CWARNFLAGS.clang+=	-Wno-format-nonliteral
102.endif # WARNS <= 3
103.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
104CWARNFLAGS+=	-Werror
105.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
106.endif # WFORMAT > 0
107.endif # WFORMAT
108.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE})
109CWARNFLAGS+=	-Wno-format
110.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE}
111
112# GCC 5.2.0
113.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200
114CWARNFLAGS+=	-Wno-error=unused-function -Wno-error=enum-compare -Wno-error=logical-not-parentheses -Wno-error=bool-compare -Wno-error=uninitialized -Wno-error=array-bounds -Wno-error=clobbered -Wno-error=cast-align -Wno-error=extra -Wno-error=attributes -Wno-error=inline -Wno-error=unused-but-set-variable -Wno-error=unused-value -Wno-error=strict-aliasing -Wno-error=address
115.endif
116
117# How to handle FreeBSD custom printf format specifiers.
118.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
119FORMAT_EXTENSIONS=	-D__printf__=__freebsd_kprintf__
120.else
121FORMAT_EXTENSIONS=	-fformat-extensions
122.endif
123
124.if defined(IGNORE_PRAGMA)
125CWARNFLAGS+=	-Wno-unknown-pragmas
126.endif # IGNORE_PRAGMA
127
128# We need this conditional because many places that use it
129# only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}.
130# unconditionally, and can't easily use the CFLAGS.clang=
131# mechanism.
132.if ${COMPILER_TYPE} == "clang"
133CLANG_NO_IAS=	 -no-integrated-as
134.endif
135CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
136		 -mllvm -simplifycfg-dup-ret
137.if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700
138CLANG_OPT_SMALL+= -mllvm -enable-gvn=false
139.else
140CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
141.endif
142CFLAGS.clang+=	 -Qunused-arguments
143.if ${MACHINE_CPUARCH} == "sparc64"
144# Don't emit .cfi directives, since we must use GNU as on sparc64, for now.
145CFLAGS.clang+=	 -fno-dwarf2-cfi-asm
146.endif # SPARC64
147# The libc++ headers use c++11 extensions.  These are normally silenced because
148# they are treated as system headers, but we explicitly disable that warning
149# suppression when building the base system to catch bugs in our headers.
150# Eventually we'll want to start building the base system C++ code as C++11,
151# but not yet.
152CXXFLAGS.clang+=	 -Wno-c++11-extensions
153
154.if ${MK_SSP} != "no" && \
155    ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
156.if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \
157    (${COMPILER_TYPE} == "gcc" && \
158     (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900))
159# Don't use -Wstack-protector as it breaks world with -Werror.
160SSP_CFLAGS?=	-fstack-protector-strong
161.else
162SSP_CFLAGS?=	-fstack-protector
163.endif
164CFLAGS+=	${SSP_CFLAGS}
165.endif # SSP && !ARM && !MIPS
166
167# Allow user-specified additional warning flags, plus compiler and file
168# specific flag overrides, unless we've overriden this...
169.if ${MK_WARNS} != "no"
170CFLAGS+=	${CWARNFLAGS} ${CWARNFLAGS.${COMPILER_TYPE}}
171CFLAGS+=	${CWARNFLAGS.${.IMPSRC:T}}
172.endif
173
174CFLAGS+=	 ${CFLAGS.${COMPILER_TYPE}}
175CXXFLAGS+=	 ${CXXFLAGS.${COMPILER_TYPE}}
176
177ACFLAGS+=	${ACFLAGS.${.IMPSRC:T}}
178CFLAGS+=	${CFLAGS.${.IMPSRC:T}}
179CXXFLAGS+=	${CXXFLAGS.${.IMPSRC:T}}
180
181# Special handling for external GCC.
182.if defined(X_COMPILER_TYPE) && ${X_COMPILER_TYPE} == "gcc"
183# GCC's --sysroot support for a cross-compiler without a default
184# TARGET_SYSTEM_ROOT does not add sysroot/usr/include in or the C++
185# include path of sysroot/usr/include/c++/v1.  They need to be added in
186# when not using -nostdinc/-nostdinc++.  This is not a problem with a
187# non-cross-compiler external GCC or the in-tree cross-compiler GCC which
188# has a default TARGET_SYSTEM_ROOT.
189.if ${CC:M--sysroot=*} || ${CFLAGS:M--sysroot=*}
190.if ${CFLAGS:M-nostdinc} == ""
191CFLAGS+=	-isystem =/usr/include
192.endif
193# Add in sysroot/usr/lib to ensure that it comes before /usr/local/lib
194# from ports compilers.
195LDFLAGS+=	-L=/usr/lib
196# We want to force building the system with our in-tree libc++.  Note that
197# this also requires a symlink in OBJDIR/lib/libc++/libstdc++.so to
198# sysroot/usr/lib/libc++.so.
199.if ${CXXFLAGS:M-nostdinc++} == "" && ${CXXFLAGS:M-nostdlib} == ""
200CXXFLAGS+=	-std=c++11 \
201		-nostdinc++ -isystem =/usr/include/c++/v1
202LDFLAGS+=	-L${OBJTOP}/lib/libc++
203.endif
204.endif	# --sysroot
205.endif	# X_COMPILER_TYPE == gcc
206
207.if defined(SRCTOP)
208# Prevent rebuilding during install to support read-only objdirs.
209.if !make(all) && make(install) && empty(.MAKE.MODE:Mmeta)
210CFLAGS+=	ERROR-tried-to-rebuild-during-make-install
211.endif
212.endif
213
214# Tell bmake not to mistake standard targets for things to be searched for
215# or expect to ever be up-to-date.
216PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \
217		beforelinking build build-tools buildconfig buildfiles \
218		buildincludes check checkdpadd clean cleandepend cleandir \
219		cleanobj configure depend distclean distribute exe \
220		files html includes install installconfig installfiles \
221		installincludes lint obj objlink objs objwarn \
222		realinstall tags whereobj
223
224# we don't want ${PROG} to be PHONY
225.PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
226.NOTMAIN: ${PHONY_NOTMAIN:Nall}
227
228.if ${MK_STAGING} != "no"
229.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*))
230_SKIP_STAGING?= yes
231.endif
232.if ${_SKIP_STAGING:Uno} == "yes"
233staging stage_libs stage_files stage_as stage_links stage_symlinks:
234.else
235# allow targets like beforeinstall to be leveraged
236DESTDIR= ${STAGE_OBJTOP}
237.export DESTDIR
238
239.if target(beforeinstall)
240.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
241staging: beforeinstall
242.endif
243.endif
244
245# normally only libs and includes are staged
246.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)
247STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
248
249.if !empty(PROG)
250.if defined(PROGNAME)
251STAGE_AS_SETS+= prog
252STAGE_AS_${PROG}= ${PROGNAME}
253stage_as.prog: ${PROG}
254.else
255STAGE_SETS+= prog
256stage_files.prog: ${PROG}
257STAGE_TARGETS+= stage_files
258.endif
259.endif
260.endif
261
262.if !empty(_LIBS) && !defined(INTERNALLIB)
263.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
264STAGE_SETS+= shlib
265STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
266STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
267stage_files.shlib: ${_LIBS:M*.so.*}
268.endif
269
270.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
271STAGE_AS_SETS+= ldscript
272STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
273stage_as.ldscript: ${SHLIB_LINK:R}.ld
274STAGE_DIR.ldscript = ${STAGE_LIBDIR}
275STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
276NO_SHLIB_LINKS=
277.endif
278
279.if target(stage_files.shlib)
280stage_libs: ${_LIBS}
281.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
282stage_files.shlib: ${SHLIB_NAME}.symbols
283.endif
284.else
285stage_libs: ${_LIBS}
286.endif
287.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
288stage_libs: ${SHLIB_NAME}.symbols
289.endif
290
291.endif
292
293.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
294.if !defined(NO_BEFOREBUILD_INCLUDES)
295stage_includes: buildincludes
296beforebuild: stage_includes
297.endif
298.endif
299
300.for t in stage_libs stage_files stage_as
301.if target($t)
302STAGE_TARGETS+= $t
303.endif
304.endfor
305
306.if !empty(STAGE_AS_SETS)
307STAGE_TARGETS+= stage_as
308.endif
309
310.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
311
312.if !empty(LINKS)
313STAGE_TARGETS+= stage_links
314.if ${MAKE_VERSION} < 20131001
315stage_links.links: ${_LIBS} ${PROG}
316.endif
317STAGE_SETS+= links
318STAGE_LINKS.links= ${LINKS}
319.endif
320
321.if !empty(SYMLINKS)
322STAGE_TARGETS+= stage_symlinks
323STAGE_SETS+= links
324STAGE_SYMLINKS.links= ${SYMLINKS}
325.endif
326
327.endif
328
329.include <meta.stage.mk>
330.endif
331.endif
332
333.if defined(META_TARGETS)
334.for _tgt in ${META_TARGETS}
335.if target(${_tgt})
336${_tgt}: ${META_DEPS}
337.endif
338.endfor
339.endif
340