xref: /freebsd/share/mk/bsd.sys.mk (revision 780fb4a2fa9a9aee5ac48a60b790f567c0dc13e9) 
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.endif # WARNS <= 3
84.if ${WARNS} <= 2
85CWARNFLAGS.clang+=	-Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
86.endif # WARNS <= 2
87.if ${WARNS} <= 1
88CWARNFLAGS.clang+=	-Wno-parentheses
89.endif # WARNS <= 1
90.if defined(NO_WARRAY_BOUNDS)
91CWARNFLAGS.clang+=	-Wno-array-bounds
92.endif # NO_WARRAY_BOUNDS
93.endif # WARNS
94
95.if defined(FORMAT_AUDIT)
96WFORMAT=	1
97.endif # FORMAT_AUDIT
98.if defined(WFORMAT)
99.if ${WFORMAT} > 0
100#CWARNFLAGS+=	-Wformat-nonliteral -Wformat-security -Wno-format-extra-args
101CWARNFLAGS+=	-Wformat=2 -Wno-format-extra-args
102.if ${WARNS} <= 3
103CWARNFLAGS.clang+=	-Wno-format-nonliteral
104.endif # WARNS <= 3
105.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
106CWARNFLAGS+=	-Werror
107.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
108.endif # WFORMAT > 0
109.endif # WFORMAT
110.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE})
111CWARNFLAGS+=	-Wno-format
112.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE}
113
114# GCC 5.2.0
115.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200
116CWARNFLAGS+=	-Wno-error=address			\
117		-Wno-error=array-bounds			\
118		-Wno-error=attributes			\
119		-Wno-error=bool-compare			\
120		-Wno-error=cast-align			\
121		-Wno-error=clobbered			\
122		-Wno-error=enum-compare			\
123		-Wno-error=extra			\
124		-Wno-error=inline			\
125		-Wno-error=logical-not-parentheses	\
126		-Wno-error=strict-aliasing		\
127		-Wno-error=uninitialized		\
128		-Wno-error=unused-but-set-variable	\
129		-Wno-error=unused-function		\
130		-Wno-error=unused-value
131.endif
132
133# GCC 6.1.0
134.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100
135CWARNFLAGS+=	-Wno-error=misleading-indentation	\
136		-Wno-error=nonnull-compare		\
137		-Wno-error=shift-negative-value		\
138		-Wno-error=tautological-compare		\
139		-Wno-error=unused-const-variable
140.endif
141
142# GCC 7.1.0
143.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 70100
144CWARNFLAGS+=	-Wno-error=bool-operation		\
145		-Wno-error=deprecated			\
146		-Wno-error=expansion-to-defined		\
147		-Wno-error=format-overflow		\
148		-Wno-error=format-truncation		\
149		-Wno-error=implicit-fallthrough		\
150		-Wno-error=int-in-bool-context		\
151		-Wno-error=memset-elt-size		\
152		-Wno-error=nonnull			\
153		-Wno-error=pointer-compare		\
154		-Wno-error=stringop-overflow
155.endif
156
157# GCC 8.1.0
158.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 80100
159CWARNFLAGS+=	-Wno-error=aggressive-loop-optimizations	\
160		-Wno-error=cast-function-type			\
161		-Wno-error=multistatement-macros		\
162		-Wno-error=restrict				\
163		-Wno-error=sizeof-pointer-memaccess		\
164		-Wno-error=stringop-truncation
165.endif
166
167# How to handle FreeBSD custom printf format specifiers.
168.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
169FORMAT_EXTENSIONS=	-D__printf__=__freebsd_kprintf__
170.else
171FORMAT_EXTENSIONS=	-fformat-extensions
172.endif
173
174.if defined(IGNORE_PRAGMA)
175CWARNFLAGS+=	-Wno-unknown-pragmas
176.endif # IGNORE_PRAGMA
177
178# We need this conditional because many places that use it
179# only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}.
180# unconditionally, and can't easily use the CFLAGS.clang=
181# mechanism.
182.if ${COMPILER_TYPE} == "clang"
183CLANG_NO_IAS=	 -no-integrated-as
184.endif
185CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
186		 -mllvm -simplifycfg-dup-ret
187.if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700
188CLANG_OPT_SMALL+= -mllvm -enable-gvn=false
189.else
190CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
191.endif
192CFLAGS.clang+=	 -Qunused-arguments
193.if ${MACHINE_CPUARCH} == "sparc64"
194# Don't emit .cfi directives, since we must use GNU as on sparc64, for now.
195CFLAGS.clang+=	 -fno-dwarf2-cfi-asm
196.endif # SPARC64
197# The libc++ headers use c++11 extensions.  These are normally silenced because
198# they are treated as system headers, but we explicitly disable that warning
199# suppression when building the base system to catch bugs in our headers.
200# Eventually we'll want to start building the base system C++ code as C++11,
201# but not yet.
202CXXFLAGS.clang+=	 -Wno-c++11-extensions
203
204.if ${MK_SSP} != "no" && \
205    ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
206.if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \
207    (${COMPILER_TYPE} == "gcc" && \
208     (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900))
209# Don't use -Wstack-protector as it breaks world with -Werror.
210SSP_CFLAGS?=	-fstack-protector-strong
211.else
212SSP_CFLAGS?=	-fstack-protector
213.endif
214CFLAGS+=	${SSP_CFLAGS}
215.endif # SSP && !ARM && !MIPS
216
217# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is
218# enabled.
219DEBUG_FILES_CFLAGS?= -g
220
221# Allow user-specified additional warning flags, plus compiler and file
222# specific flag overrides, unless we've overriden this...
223.if ${MK_WARNS} != "no"
224CFLAGS+=	${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}}
225CFLAGS+=	${CWARNFLAGS.${.IMPSRC:T}}
226.endif
227
228CFLAGS+=	 ${CFLAGS.${COMPILER_TYPE}}
229CXXFLAGS+=	 ${CXXFLAGS.${COMPILER_TYPE}}
230
231AFLAGS+=	${AFLAGS.${.IMPSRC:T}}
232ACFLAGS+=	${ACFLAGS.${.IMPSRC:T}}
233CFLAGS+=	${CFLAGS.${.IMPSRC:T}}
234CXXFLAGS+=	${CXXFLAGS.${.IMPSRC:T}}
235
236LDFLAGS+=	${LDFLAGS.${LINKER_TYPE}}
237
238.if defined(SRCTOP)
239# Prevent rebuilding during install to support read-only objdirs.
240.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta)
241CFLAGS+=	ERROR-tried-to-rebuild-during-make-install
242.endif
243.endif
244
245# Tell bmake not to mistake standard targets for things to be searched for
246# or expect to ever be up-to-date.
247PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \
248		beforelinking build build-tools buildconfig buildfiles \
249		buildincludes check checkdpadd clean cleandepend cleandir \
250		cleanobj configure depend distclean distribute exe \
251		files html includes install installconfig installfiles \
252		installincludes lint obj objlink objs objwarn \
253		realinstall tags whereobj
254
255# we don't want ${PROG} to be PHONY
256.PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
257.NOTMAIN: ${PHONY_NOTMAIN:Nall}
258
259.if ${MK_STAGING} != "no"
260.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*))
261_SKIP_STAGING?= yes
262.endif
263.if ${_SKIP_STAGING:Uno} == "yes"
264staging stage_libs stage_files stage_as stage_links stage_symlinks:
265.else
266# allow targets like beforeinstall to be leveraged
267DESTDIR= ${STAGE_OBJTOP}
268.export DESTDIR
269
270.if target(beforeinstall)
271.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
272staging: beforeinstall
273.endif
274.endif
275
276# normally only libs and includes are staged
277.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)
278STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
279
280.if !empty(PROG)
281.if defined(PROGNAME)
282STAGE_AS_SETS+= prog
283STAGE_AS_${PROG}= ${PROGNAME}
284stage_as.prog: ${PROG}
285.else
286STAGE_SETS+= prog
287stage_files.prog: ${PROG}
288STAGE_TARGETS+= stage_files
289.endif
290.endif
291.endif
292
293.if !empty(_LIBS) && !defined(INTERNALLIB)
294.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
295STAGE_SETS+= shlib
296STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
297STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
298stage_files.shlib: ${_LIBS:M*.so.*}
299.endif
300
301.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
302STAGE_AS_SETS+= ldscript
303STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
304stage_as.ldscript: ${SHLIB_LINK:R}.ld
305STAGE_DIR.ldscript = ${STAGE_LIBDIR}
306STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
307NO_SHLIB_LINKS=
308.endif
309
310.if target(stage_files.shlib)
311stage_libs: ${_LIBS}
312.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
313stage_files.shlib: ${SHLIB_NAME}.symbols
314.endif
315.else
316stage_libs: ${_LIBS}
317.endif
318.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
319stage_libs: ${SHLIB_NAME}.symbols
320.endif
321
322.endif
323
324.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
325.if !defined(NO_BEFOREBUILD_INCLUDES)
326stage_includes: buildincludes
327beforebuild: stage_includes
328.endif
329.endif
330
331.for t in stage_libs stage_files stage_as
332.if target($t)
333STAGE_TARGETS+= $t
334.endif
335.endfor
336
337.if !empty(STAGE_AS_SETS)
338STAGE_TARGETS+= stage_as
339.endif
340
341.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
342
343.if !empty(LINKS)
344STAGE_TARGETS+= stage_links
345.if ${MAKE_VERSION} < 20131001
346stage_links.links: ${_LIBS} ${PROG}
347.endif
348STAGE_SETS+= links
349STAGE_LINKS.links= ${LINKS}
350.endif
351
352.if !empty(SYMLINKS)
353STAGE_TARGETS+= stage_symlinks
354STAGE_SETS+= links
355STAGE_SYMLINKS.links= ${SYMLINKS}
356.endif
357
358.endif
359
360.include <meta.stage.mk>
361.endif
362.endif
363
364.if defined(META_TARGETS)
365.for _tgt in ${META_TARGETS}
366.if target(${_tgt})
367${_tgt}: ${META_DEPS}
368.endif
369.endfor
370.endif
371