xref: /freebsd/share/mk/bsd.sys.mk (revision b37f6c9805edb4b89f0a8c2b78f78a3dcfc0647b) 
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.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 60000
75CWARNFLAGS.clang+=	-Wno-error=tautological-constant-compare
76.endif
77.endif # WARNS <= 6
78.if ${WARNS} <= 3
79CWARNFLAGS.clang+=	-Wno-tautological-compare -Wno-unused-value\
80		-Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion
81.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
82CWARNFLAGS.clang+=	-Wno-unused-local-typedef
83.endif
84.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 40000
85CWARNFLAGS.clang+=	-Wno-address-of-packed-member
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=deprecated			\
149		-Wno-error=pointer-compare		\
150		-Wno-error=format-truncation		\
151		-Wno-error=implicit-fallthrough		\
152		-Wno-error=expansion-to-defined		\
153		-Wno-error=int-in-bool-context		\
154		-Wno-error=bool-operation		\
155		-Wno-error=format-overflow		\
156		-Wno-error=stringop-overflow		\
157		-Wno-error=memset-elt-size		\
158		-Wno-error=int-in-bool-context		\
159		-Wno-error=unused-const-variable	\
160		-Wno-error=nonnull
161.endif
162
163# How to handle FreeBSD custom printf format specifiers.
164.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30600
165FORMAT_EXTENSIONS=	-D__printf__=__freebsd_kprintf__
166.else
167FORMAT_EXTENSIONS=	-fformat-extensions
168.endif
169
170.if defined(IGNORE_PRAGMA)
171CWARNFLAGS+=	-Wno-unknown-pragmas
172.endif # IGNORE_PRAGMA
173
174# We need this conditional because many places that use it
175# only enable it for some files with CLFAGS.$FILE+=${CLANG_NO_IAS}.
176# unconditionally, and can't easily use the CFLAGS.clang=
177# mechanism.
178.if ${COMPILER_TYPE} == "clang"
179CLANG_NO_IAS=	 -no-integrated-as
180.endif
181CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3\
182		 -mllvm -simplifycfg-dup-ret
183.if ${COMPILER_VERSION} >= 30500 && ${COMPILER_VERSION} < 30700
184CLANG_OPT_SMALL+= -mllvm -enable-gvn=false
185.else
186CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
187.endif
188CFLAGS.clang+=	 -Qunused-arguments
189.if ${MACHINE_CPUARCH} == "sparc64"
190# Don't emit .cfi directives, since we must use GNU as on sparc64, for now.
191CFLAGS.clang+=	 -fno-dwarf2-cfi-asm
192.endif # SPARC64
193# The libc++ headers use c++11 extensions.  These are normally silenced because
194# they are treated as system headers, but we explicitly disable that warning
195# suppression when building the base system to catch bugs in our headers.
196# Eventually we'll want to start building the base system C++ code as C++11,
197# but not yet.
198CXXFLAGS.clang+=	 -Wno-c++11-extensions
199
200.if ${MK_SSP} != "no" && \
201    ${MACHINE_CPUARCH} != "arm" && ${MACHINE_CPUARCH} != "mips"
202.if (${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 30500) || \
203    (${COMPILER_TYPE} == "gcc" && \
204     (${COMPILER_VERSION} == 40201 || ${COMPILER_VERSION} >= 40900))
205# Don't use -Wstack-protector as it breaks world with -Werror.
206SSP_CFLAGS?=	-fstack-protector-strong
207.else
208SSP_CFLAGS?=	-fstack-protector
209.endif
210CFLAGS+=	${SSP_CFLAGS}
211.endif # SSP && !ARM && !MIPS
212
213# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is
214# enabled.
215DEBUG_FILES_CFLAGS?= -g
216
217# Allow user-specified additional warning flags, plus compiler and file
218# specific flag overrides, unless we've overriden this...
219.if ${MK_WARNS} != "no"
220CFLAGS+=	${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}}
221CFLAGS+=	${CWARNFLAGS.${.IMPSRC:T}}
222.endif
223
224CFLAGS+=	 ${CFLAGS.${COMPILER_TYPE}}
225CXXFLAGS+=	 ${CXXFLAGS.${COMPILER_TYPE}}
226
227AFLAGS+=	${AFLAGS.${.IMPSRC:T}}
228ACFLAGS+=	${ACFLAGS.${.IMPSRC:T}}
229CFLAGS+=	${CFLAGS.${.IMPSRC:T}}
230CXXFLAGS+=	${CXXFLAGS.${.IMPSRC:T}}
231
232.if defined(SRCTOP)
233# Prevent rebuilding during install to support read-only objdirs.
234.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta)
235CFLAGS+=	ERROR-tried-to-rebuild-during-make-install
236.endif
237.endif
238
239# Tell bmake not to mistake standard targets for things to be searched for
240# or expect to ever be up-to-date.
241PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \
242		beforelinking build build-tools buildconfig buildfiles \
243		buildincludes check checkdpadd clean cleandepend cleandir \
244		cleanobj configure depend distclean distribute exe \
245		files html includes install installconfig installfiles \
246		installincludes lint obj objlink objs objwarn \
247		realinstall tags whereobj
248
249# we don't want ${PROG} to be PHONY
250.PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
251.NOTMAIN: ${PHONY_NOTMAIN:Nall}
252
253.if ${MK_STAGING} != "no"
254.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*))
255_SKIP_STAGING?= yes
256.endif
257.if ${_SKIP_STAGING:Uno} == "yes"
258staging stage_libs stage_files stage_as stage_links stage_symlinks:
259.else
260# allow targets like beforeinstall to be leveraged
261DESTDIR= ${STAGE_OBJTOP}
262.export DESTDIR
263
264.if target(beforeinstall)
265.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
266staging: beforeinstall
267.endif
268.endif
269
270# normally only libs and includes are staged
271.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)
272STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
273
274.if !empty(PROG)
275.if defined(PROGNAME)
276STAGE_AS_SETS+= prog
277STAGE_AS_${PROG}= ${PROGNAME}
278stage_as.prog: ${PROG}
279.else
280STAGE_SETS+= prog
281stage_files.prog: ${PROG}
282STAGE_TARGETS+= stage_files
283.endif
284.endif
285.endif
286
287.if !empty(_LIBS) && !defined(INTERNALLIB)
288.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
289STAGE_SETS+= shlib
290STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
291STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
292stage_files.shlib: ${_LIBS:M*.so.*}
293.endif
294
295.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
296STAGE_AS_SETS+= ldscript
297STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
298stage_as.ldscript: ${SHLIB_LINK:R}.ld
299STAGE_DIR.ldscript = ${STAGE_LIBDIR}
300STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
301NO_SHLIB_LINKS=
302.endif
303
304.if target(stage_files.shlib)
305stage_libs: ${_LIBS}
306.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
307stage_files.shlib: ${SHLIB_NAME}.symbols
308.endif
309.else
310stage_libs: ${_LIBS}
311.endif
312.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
313stage_libs: ${SHLIB_NAME}.symbols
314.endif
315
316.endif
317
318.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
319.if !defined(NO_BEFOREBUILD_INCLUDES)
320stage_includes: buildincludes
321beforebuild: stage_includes
322.endif
323.endif
324
325.for t in stage_libs stage_files stage_as
326.if target($t)
327STAGE_TARGETS+= $t
328.endif
329.endfor
330
331.if !empty(STAGE_AS_SETS)
332STAGE_TARGETS+= stage_as
333.endif
334
335.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
336
337.if !empty(LINKS)
338STAGE_TARGETS+= stage_links
339.if ${MAKE_VERSION} < 20131001
340stage_links.links: ${_LIBS} ${PROG}
341.endif
342STAGE_SETS+= links
343STAGE_LINKS.links= ${LINKS}
344.endif
345
346.if !empty(SYMLINKS)
347STAGE_TARGETS+= stage_symlinks
348STAGE_SETS+= links
349STAGE_SYMLINKS.links= ${SYMLINKS}
350.endif
351
352.endif
353
354.include <meta.stage.mk>
355.endif
356.endif
357
358.if defined(META_TARGETS)
359.for _tgt in ${META_TARGETS}
360.if target(${_tgt})
361${_tgt}: ${META_DEPS}
362.endif
363.endfor
364.endif
365