xref: /freebsd/share/mk/bsd.sys.mk (revision 0957b409) 
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 4.2.1 GCC:   http://gcc.gnu.org/onlinedocs/gcc-4.2.1/gcc/Warning-Options.html
10# for current GCC: https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
11# for clang: https://clang.llvm.org/docs/DiagnosticsReference.html
12
13.include <bsd.compiler.mk>
14
15# the default is gnu99 for now
16CSTD?=		gnu99
17
18.if ${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.if ${WARNS} >= 6
51CWARNFLAGS+=	-Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\
52		-Wold-style-definition
53.if !defined(NO_WMISSING_VARIABLE_DECLARATIONS)
54CWARNFLAGS.clang+=	-Wmissing-variable-declarations
55.endif
56.if !defined(NO_WTHREAD_SAFETY)
57CWARNFLAGS.clang+=	-Wthread-safety
58.endif
59.endif # WARNS >= 6
60.if ${WARNS} >= 2 && ${WARNS} <= 4
61# XXX Delete -Wuninitialized by default for now -- the compiler doesn't
62# XXX always get it right.
63CWARNFLAGS+=	-Wno-uninitialized
64.endif # WARNS >=2 && WARNS <= 4
65CWARNFLAGS+=	-Wno-pointer-sign
66# Clang has more warnings enabled by default, and when using -Wall, so if WARNS
67# is set to low values, these have to be disabled explicitly.
68.if ${WARNS} <= 6
69CWARNFLAGS.clang+=	-Wno-empty-body -Wno-string-plus-int
70.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30400
71CWARNFLAGS.clang+=	-Wno-unused-const-variable
72.endif
73.endif # WARNS <= 6
74.if ${WARNS} <= 3
75CWARNFLAGS.clang+=	-Wno-tautological-compare -Wno-unused-value\
76		-Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion
77.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
78CWARNFLAGS.clang+=	-Wno-unused-local-typedef
79.endif
80.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 40000
81CWARNFLAGS.clang+=	-Wno-address-of-packed-member
82.endif
83.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 70000 && \
84    ${MACHINE_CPUARCH} == "arm" && !${MACHINE_ARCH:Marmv[67]*}
85CWARNFLAGS.clang+=	-Wno-atomic-alignment
86.endif
87.endif # WARNS <= 3
88.if ${WARNS} <= 2
89CWARNFLAGS.clang+=	-Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
90.endif # WARNS <= 2
91.if ${WARNS} <= 1
92CWARNFLAGS.clang+=	-Wno-parentheses
93.endif # WARNS <= 1
94.if defined(NO_WARRAY_BOUNDS)
95CWARNFLAGS.clang+=	-Wno-array-bounds
96.endif # NO_WARRAY_BOUNDS
97.endif # WARNS
98
99.if defined(FORMAT_AUDIT)
100WFORMAT=	1
101.endif # FORMAT_AUDIT
102.if defined(WFORMAT)
103.if ${WFORMAT} > 0
104#CWARNFLAGS+=	-Wformat-nonliteral -Wformat-security -Wno-format-extra-args
105CWARNFLAGS+=	-Wformat=2 -Wno-format-extra-args
106.if ${WARNS} <= 3
107CWARNFLAGS.clang+=	-Wno-format-nonliteral
108.endif # WARNS <= 3
109.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
110CWARNFLAGS+=	-Werror
111.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
112.endif # WFORMAT > 0
113.endif # WFORMAT
114.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE})
115CWARNFLAGS+=	-Wno-format
116.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE}
117
118# GCC 5.2.0
119.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200
120CWARNFLAGS+=	-Wno-error=address			\
121		-Wno-error=array-bounds			\
122		-Wno-error=attributes			\
123		-Wno-error=bool-compare			\
124		-Wno-error=cast-align			\
125		-Wno-error=clobbered			\
126		-Wno-error=enum-compare			\
127		-Wno-error=extra			\
128		-Wno-error=inline			\
129		-Wno-error=logical-not-parentheses	\
130		-Wno-error=strict-aliasing		\
131		-Wno-error=uninitialized		\
132		-Wno-error=unused-but-set-variable	\
133		-Wno-error=unused-function		\
134		-Wno-error=unused-value
135.endif
136
137# GCC 6.1.0
138.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100
139CWARNFLAGS+=	-Wno-error=misleading-indentation	\
140		-Wno-error=nonnull-compare		\
141		-Wno-error=shift-negative-value		\
142		-Wno-error=tautological-compare		\
143		-Wno-error=unused-const-variable
144.endif
145
146# GCC 7.1.0
147.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 70100
148CWARNFLAGS+=	-Wno-error=bool-operation		\
149		-Wno-error=deprecated			\
150		-Wno-error=expansion-to-defined		\
151		-Wno-error=format-overflow		\
152		-Wno-error=format-truncation		\
153		-Wno-error=implicit-fallthrough		\
154		-Wno-error=int-in-bool-context		\
155		-Wno-error=memset-elt-size		\
156		-Wno-error=noexcept-type		\
157		-Wno-error=nonnull			\
158		-Wno-error=pointer-compare		\
159		-Wno-error=stringop-overflow
160.endif
161
162# GCC 8.1.0
163.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 80100
164CWARNFLAGS+=	-Wno-error=aggressive-loop-optimizations	\
165		-Wno-error=cast-function-type			\
166		-Wno-error=catch-value				\
167		-Wno-error=multistatement-macros		\
168		-Wno-error=restrict				\
169		-Wno-error=sizeof-pointer-memaccess		\
170		-Wno-error=stringop-truncation
171.endif
172
173# How to handle FreeBSD custom printf format specifiers.
174.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
175FORMAT_EXTENSIONS=	-D__printf__=__freebsd_kprintf__
176.else
177FORMAT_EXTENSIONS=	-fformat-extensions
178.endif
179
180.if defined(IGNORE_PRAGMA)
181CWARNFLAGS+=	-Wno-unknown-pragmas
182.endif # IGNORE_PRAGMA
183
184# We need this conditional because many places that use it
185# only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}.
186# unconditionally, and can't easily use the CFLAGS.clang=
187# mechanism.
188.if ${COMPILER_TYPE} == "clang"
189CLANG_NO_IAS=	 -no-integrated-as
190.endif
191CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
192		 -mllvm -simplifycfg-dup-ret
193.if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700
194CLANG_OPT_SMALL+= -mllvm -enable-gvn=false
195.else
196CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
197.endif
198CFLAGS.clang+=	 -Qunused-arguments
199.if ${MACHINE_CPUARCH} == "sparc64"
200# Don't emit .cfi directives, since we must use GNU as on sparc64, for now.
201CFLAGS.clang+=	 -fno-dwarf2-cfi-asm
202.endif # SPARC64
203# The libc++ headers use c++11 extensions.  These are normally silenced because
204# they are treated as system headers, but we explicitly disable that warning
205# suppression when building the base system to catch bugs in our headers.
206# Eventually we'll want to start building the base system C++ code as C++11,
207# but not yet.
208CXXFLAGS.clang+=	 -Wno-c++11-extensions
209
210.if ${MK_SSP} != "no" && \
211    ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
212.if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \
213    (${COMPILER_TYPE} == "gcc" && \
214     (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900))
215# Don't use -Wstack-protector as it breaks world with -Werror.
216SSP_CFLAGS?=	-fstack-protector-strong
217.else
218SSP_CFLAGS?=	-fstack-protector
219.endif
220CFLAGS+=	${SSP_CFLAGS}
221.endif # SSP && !ARM && !MIPS
222
223# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is
224# enabled.
225DEBUG_FILES_CFLAGS?= -g
226
227# Allow user-specified additional warning flags, plus compiler and file
228# specific flag overrides, unless we've overridden this...
229.if ${MK_WARNS} != "no"
230CFLAGS+=	${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}}
231CFLAGS+=	${CWARNFLAGS.${.IMPSRC:T}}
232.endif
233
234CFLAGS+=	 ${CFLAGS.${COMPILER_TYPE}}
235CXXFLAGS+=	 ${CXXFLAGS.${COMPILER_TYPE}}
236
237AFLAGS+=	${AFLAGS.${.IMPSRC:T}}
238ACFLAGS+=	${ACFLAGS.${.IMPSRC:T}}
239CFLAGS+=	${CFLAGS.${.IMPSRC:T}}
240CXXFLAGS+=	${CXXFLAGS.${.IMPSRC:T}}
241
242LDFLAGS+=	${LDFLAGS.${LINKER_TYPE}}
243
244.if defined(SRCTOP)
245# Prevent rebuilding during install to support read-only objdirs.
246.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta)
247CFLAGS+=	ERROR-tried-to-rebuild-during-make-install
248.endif
249.endif
250
251# Tell bmake not to mistake standard targets for things to be searched for
252# or expect to ever be up-to-date.
253PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \
254		beforelinking build build-tools buildconfig buildfiles \
255		buildincludes check checkdpadd clean cleandepend cleandir \
256		cleanobj configure depend distclean distribute exe \
257		files html includes install installconfig installdirs \
258		installfiles installincludes lint obj objlink objs objwarn \
259		realinstall tags whereobj
260
261# we don't want ${PROG} to be PHONY
262.PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
263.NOTMAIN: ${PHONY_NOTMAIN:Nall}
264
265.if ${MK_STAGING} != "no"
266.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*))
267_SKIP_STAGING?= yes
268.endif
269.if ${_SKIP_STAGING:Uno} == "yes"
270staging stage_libs stage_files stage_as stage_links stage_symlinks:
271.else
272# allow targets like beforeinstall to be leveraged
273DESTDIR= ${STAGE_OBJTOP}
274.export DESTDIR
275
276.if target(beforeinstall)
277.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
278staging: beforeinstall
279.endif
280.endif
281
282# normally only libs and includes are staged
283.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)
284STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
285
286.if !empty(PROG)
287.if defined(PROGNAME)
288STAGE_AS_SETS+= prog
289STAGE_AS_${PROG}= ${PROGNAME}
290stage_as.prog: ${PROG}
291.else
292STAGE_SETS+= prog
293stage_files.prog: ${PROG}
294STAGE_TARGETS+= stage_files
295.endif
296.endif
297.endif
298
299.if !empty(_LIBS) && !defined(INTERNALLIB)
300.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
301STAGE_SETS+= shlib
302STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
303STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
304stage_files.shlib: ${_LIBS:M*.so.*}
305.endif
306
307.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
308STAGE_AS_SETS+= ldscript
309STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
310stage_as.ldscript: ${SHLIB_LINK:R}.ld
311STAGE_DIR.ldscript = ${STAGE_LIBDIR}
312STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
313NO_SHLIB_LINKS=
314.endif
315
316.if target(stage_files.shlib)
317stage_libs: ${_LIBS}
318.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
319stage_files.shlib: ${SHLIB_NAME}.symbols
320.endif
321.else
322stage_libs: ${_LIBS}
323.endif
324.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
325stage_libs: ${SHLIB_NAME}.symbols
326.endif
327
328.endif
329
330.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
331.if !defined(NO_BEFOREBUILD_INCLUDES)
332stage_includes: buildincludes
333beforebuild: stage_includes
334.endif
335.endif
336
337.for t in stage_libs stage_files stage_as
338.if target($t)
339STAGE_TARGETS+= $t
340.endif
341.endfor
342
343.if !empty(STAGE_AS_SETS)
344STAGE_TARGETS+= stage_as
345.endif
346
347.if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
348
349.if !empty(LINKS)
350STAGE_TARGETS+= stage_links
351.if ${MAKE_VERSION} < 20131001
352stage_links.links: ${_LIBS} ${PROG}
353.endif
354STAGE_SETS+= links
355STAGE_LINKS.links= ${LINKS}
356.endif
357
358.if !empty(SYMLINKS)
359STAGE_TARGETS+= stage_symlinks
360STAGE_SETS+= links
361STAGE_SYMLINKS.links= ${SYMLINKS}
362.endif
363
364.endif
365
366.include <meta.stage.mk>
367.endif
368.endif
369
370.if defined(META_TARGETS)
371.for _tgt in ${META_TARGETS}
372.if target(${_tgt})
373${_tgt}: ${META_DEPS}
374.endif
375.endfor
376.endif
377