bsd.sys.mk revision 352023 
1# $FreeBSD: stable/11/share/mk/bsd.sys.mk 352023 2019-09-07 20:01:26Z imp $
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#
28# Turn off -Werror for gcc 4.2.1. The compiler is on the glide path out of the
29# system, and any warnings specific to it are no longer relevant as there are
30# too many false positives.
31#
32.if ${COMPILER_VERSION} <  50000
33NO_WERROR.gcc=	yes
34.endif
35
36# -pedantic is problematic because it also imposes namespace restrictions
37#CFLAGS+=	-pedantic
38.if defined(WARNS)
39.if ${WARNS} >= 1
40CWARNFLAGS+=	-Wsystem-headers
41.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
42CWARNFLAGS+=	-Werror
43.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
44.endif # WARNS >= 1
45.if ${WARNS} >= 2
46CWARNFLAGS+=	-Wall -Wno-format-y2k
47.endif # WARNS >= 2
48.if ${WARNS} >= 3
49CWARNFLAGS+=	-W -Wno-unused-parameter -Wstrict-prototypes\
50		-Wmissing-prototypes -Wpointer-arith
51.endif # WARNS >= 3
52.if ${WARNS} >= 4
53CWARNFLAGS+=	-Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\
54		-Wunused-parameter
55.if !defined(NO_WCAST_ALIGN) && !defined(NO_WCAST_ALIGN.${COMPILER_TYPE})
56CWARNFLAGS+=	-Wcast-align
57.endif # !NO_WCAST_ALIGN !NO_WCAST_ALIGN.${COMPILER_TYPE}
58.endif # WARNS >= 4
59# BDECFLAGS
60.if ${WARNS} >= 6
61CWARNFLAGS+=	-Wchar-subscripts -Winline -Wnested-externs -Wredundant-decls\
62		-Wold-style-definition
63.if !defined(NO_WMISSING_VARIABLE_DECLARATIONS)
64CWARNFLAGS.clang+=	-Wmissing-variable-declarations
65.endif
66.if !defined(NO_WTHREAD_SAFETY)
67CWARNFLAGS.clang+=	-Wthread-safety
68.endif
69.endif # WARNS >= 6
70.if ${WARNS} >= 2 && ${WARNS} <= 4
71# XXX Delete -Wuninitialized by default for now -- the compiler doesn't
72# XXX always get it right.
73CWARNFLAGS+=	-Wno-uninitialized
74.endif # WARNS >=2 && WARNS <= 4
75CWARNFLAGS+=	-Wno-pointer-sign
76# Clang has more warnings enabled by default, and when using -Wall, so if WARNS
77# is set to low values, these have to be disabled explicitly.
78.if ${WARNS} <= 6
79CWARNFLAGS.clang+=	-Wno-empty-body -Wno-string-plus-int
80.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30400
81CWARNFLAGS.clang+= -Wno-unused-const-variable
82.endif
83.endif # WARNS <= 6
84.if ${WARNS} <= 3
85CWARNFLAGS.clang+=	-Wno-tautological-compare -Wno-unused-value\
86		-Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion
87.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
88CWARNFLAGS.clang+=	-Wno-unused-local-typedef
89.endif
90.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 40000
91CWARNFLAGS.clang+=	-Wno-address-of-packed-member
92.endif
93.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 70000 && \
94    ${MACHINE_CPUARCH} == "arm" && !${MACHINE_ARCH:Marmv[67]*}
95CWARNFLAGS.clang+=	-Wno-atomic-alignment
96.endif
97.endif # WARNS <= 3
98.if ${WARNS} <= 2
99CWARNFLAGS.clang+=	-Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
100.endif # WARNS <= 2
101.if ${WARNS} <= 1
102CWARNFLAGS.clang+=	-Wno-parentheses
103.endif # WARNS <= 1
104.if defined(NO_WARRAY_BOUNDS)
105CWARNFLAGS.clang+=	-Wno-array-bounds
106.endif # NO_WARRAY_BOUNDS
107.endif # WARNS
108
109.if defined(FORMAT_AUDIT)
110WFORMAT=	1
111.endif # FORMAT_AUDIT
112.if defined(WFORMAT)
113.if ${WFORMAT} > 0
114#CWARNFLAGS+=	-Wformat-nonliteral -Wformat-security -Wno-format-extra-args
115CWARNFLAGS+=	-Wformat=2 -Wno-format-extra-args
116.if ${WARNS} <= 3
117CWARNFLAGS.clang+=	-Wno-format-nonliteral
118.endif # WARNS <= 3
119.if !defined(NO_WERROR) && !defined(NO_WERROR.${COMPILER_TYPE})
120CWARNFLAGS+=	-Werror
121.endif # !NO_WERROR && !NO_WERROR.${COMPILER_TYPE}
122.endif # WFORMAT > 0
123.endif # WFORMAT
124.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE})
125CWARNFLAGS+=	-Wno-format
126.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE}
127
128# GCC 5.2.0
129.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200
130CWARNFLAGS+=	-Wno-error=address			\
131		-Wno-error=array-bounds			\
132		-Wno-error=attributes			\
133		-Wno-error=bool-compare			\
134		-Wno-error=cast-align			\
135		-Wno-error=clobbered			\
136		-Wno-error=enum-compare			\
137		-Wno-error=extra			\
138		-Wno-error=inline			\
139		-Wno-error=logical-not-parentheses	\
140		-Wno-error=strict-aliasing		\
141		-Wno-error=uninitialized		\
142		-Wno-error=unused-but-set-variable	\
143		-Wno-error=unused-function		\
144		-Wno-error=unused-value
145.endif
146
147# GCC 6.1.0
148.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 60100
149CWARNFLAGS+=	-Wno-error=misleading-indentation	\
150		-Wno-error=nonnull-compare		\
151		-Wno-error=shift-negative-value		\
152		-Wno-error=tautological-compare		\
153		-Wno-error=unused-const-variable
154.endif
155
156# How to handle FreeBSD custom printf format specifiers.
157.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
158FORMAT_EXTENSIONS=	-D__printf__=__freebsd_kprintf__
159.else
160FORMAT_EXTENSIONS=	-fformat-extensions
161.endif
162
163.if defined(IGNORE_PRAGMA)
164CWARNFLAGS+=	-Wno-unknown-pragmas
165.endif # IGNORE_PRAGMA
166
167# We need this conditional because many places that use it
168# only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}.
169# unconditionally, and can't easily use the CFLAGS.clang=
170# mechanism.
171.if ${COMPILER_TYPE} == "clang"
172CLANG_NO_IAS=	 -no-integrated-as
173.endif
174CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
175		 -mllvm -simplifycfg-dup-ret
176.if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700
177CLANG_OPT_SMALL+= -mllvm -enable-gvn=false
178.else
179CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
180.endif
181CFLAGS.clang+=	 -Qunused-arguments
182.if ${MACHINE_CPUARCH} == "sparc64"
183# Don't emit .cfi directives, since we must use GNU as on sparc64, for now.
184CFLAGS.clang+=	 -fno-dwarf2-cfi-asm
185.endif # SPARC64
186# The libc++ headers use c++11 extensions.  These are normally silenced because
187# they are treated as system headers, but we explicitly disable that warning
188# suppression when building the base system to catch bugs in our headers.
189# Eventually we'll want to start building the base system C++ code as C++11,
190# but not yet.
191CXXFLAGS.clang+=	 -Wno-c++11-extensions
192
193.if ${MK_SSP} != "no" && \
194    ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
195.if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \
196    (${COMPILER_TYPE} == "gcc" && \
197     (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900))
198# Don't use -Wstack-protector as it breaks world with -Werror.
199SSP_CFLAGS?=	-fstack-protector-strong
200.else
201SSP_CFLAGS?=	-fstack-protector
202.endif
203CFLAGS+=	${SSP_CFLAGS}
204.endif # SSP && !ARM && !MIPS
205
206# Allow user-specified additional warning flags, plus compiler and file
207# specific flag overrides, unless we've overriden this...
208.if ${MK_WARNS} != "no"
209CFLAGS+=	${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}}
210CFLAGS+=	${CWARNFLAGS.${.IMPSRC:T}}
211.endif
212
213CFLAGS+=	 ${CFLAGS.${COMPILER_TYPE}}
214CXXFLAGS+=	 ${CXXFLAGS.${COMPILER_TYPE}}
215
216AFLAGS+=	${AFLAGS.${.IMPSRC:T}}
217ACFLAGS+=	${ACFLAGS.${.IMPSRC:T}}
218CFLAGS+=	${CFLAGS.${.IMPSRC:T}}
219CXXFLAGS+=	${CXXFLAGS.${.IMPSRC:T}}
220
221.if defined(SRCTOP)
222# Prevent rebuilding during install to support read-only objdirs.
223.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta)
224CFLAGS+=	ERROR-tried-to-rebuild-during-make-install
225.endif
226.endif
227
228# Tell bmake not to mistake standard targets for things to be searched for
229# or expect to ever be up-to-date.
230PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \
231		beforelinking build build-tools buildconfig buildfiles \
232		buildincludes check checkdpadd clean cleandepend cleandir \
233		cleanobj configure depend distclean distribute exe \
234		files html includes install installconfig installfiles \
235		installincludes lint obj objlink objs objwarn \
236		realinstall tags whereobj
237
238# we don't want ${PROG} to be PHONY
239.PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
240.NOTMAIN: ${PHONY_NOTMAIN:Nall}
241
242.if ${MK_STAGING} != "no"
243.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*))
244_SKIP_STAGING?= yes
245.endif
246.if ${_SKIP_STAGING:Uno} == "yes"
247staging stage_libs stage_files stage_as stage_links stage_symlinks:
248.else
249# allow targets like beforeinstall to be leveraged
250DESTDIR= ${STAGE_OBJTOP}
251.export DESTDIR
252
253.if target(beforeinstall)
254.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
255staging: beforeinstall
256.endif
257.endif
258
259# normally only libs and includes are staged
260.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)
261STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
262
263.if !empty(PROG)
264.if defined(PROGNAME)
265STAGE_AS_SETS+= prog
266STAGE_AS_${PROG}= ${PROGNAME}
267stage_as.prog: ${PROG}
268.else
269STAGE_SETS+= prog
270stage_files.prog: ${PROG}
271STAGE_TARGETS+= stage_files
272.endif
273.endif
274.endif
275
276.if !empty(_LIBS) && !defined(INTERNALLIB)
277.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
278STAGE_SETS+= shlib
279STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
280STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
281stage_files.shlib: ${_LIBS:M*.so.*}
282.endif
283
284.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
285STAGE_AS_SETS+= ldscript
286STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
287stage_as.ldscript: ${SHLIB_LINK:R}.ld
288STAGE_DIR.ldscript = ${STAGE_LIBDIR}
289STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
290NO_SHLIB_LINKS=
291.endif
292
293.if target(stage_files.shlib)
294stage_libs: ${_LIBS}
295.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
296stage_files.shlib: ${SHLIB_NAME}.symbols
297.endif
298.else
299stage_libs: ${_LIBS}
300.endif
301.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
302stage_libs: ${SHLIB_NAME}.symbols
303.endif
304
305.endif
306
307.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
308.if !defined(NO_BEFOREBUILD_INCLUDES)
309stage_includes: buildincludes
310beforebuild: stage_includes
311.endif
312.endif
313
314.for t in stage_libs stage_files stage_as
315.if target($t)
316STAGE_TARGETS+= $t
317.endif
318.endfor
319
320.if !empty(STAGE_AS_SETS)
321STAGE_TARGETS+= stage_as
322.endif
323
324.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
325
326.if !empty(LINKS)
327STAGE_TARGETS+= stage_links
328.if ${MAKE_VERSION} < 20131001
329stage_links.links: ${_LIBS} ${PROG}
330.endif
331STAGE_SETS+= links
332STAGE_LINKS.links= ${LINKS}
333.endif
334
335.if !empty(SYMLINKS)
336STAGE_TARGETS+= stage_symlinks
337STAGE_SETS+= links
338STAGE_SYMLINKS.links= ${SYMLINKS}
339.endif
340
341.endif
342
343.include <meta.stage.mk>
344.endif
345.endif
346
347.if defined(META_TARGETS)
348.for _tgt in ${META_TARGETS}
349.if target(${_tgt})
350${_tgt}: ${META_DEPS}
351.endif
352.endfor
353.endif
354