xref: /freebsd/share/mk/bsd.sys.mk (revision f1a94c5552a2c2880a10cf0b121ae56d1b407f0c) 
1#
2# This file contains common settings used for building FreeBSD
3# sources.
4
5# Enable various levels of compiler warning checks.  These may be
6# overridden (e.g. if using a non-gcc compiler) by defining MK_WARNS=no.
7
8# for GCC:   https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
9# for clang: https://clang.llvm.org/docs/DiagnosticsReference.html
10
11.include <bsd.compiler.mk>
12
13CSTD?=		gnu17
14
15.if ${CSTD} == "c89" || ${CSTD} == "c90"
16CFLAGS+=	-std=iso9899:1990
17.elif ${CSTD} == "c94" || ${CSTD} == "c95"
18CFLAGS+=	-std=iso9899:199409
19.elif ${CSTD} == "c99"
20CFLAGS+=	-std=iso9899:1999
21.else # CSTD
22CFLAGS+=	-std=${CSTD}
23.endif # CSTD
24
25CXXSTD?=	gnu++17
26
27.if !empty(CXXSTD)
28CXXFLAGS+=	-std=${CXXSTD}
29.endif
30
31# This gives the Makefile we're evaluating at the top-level a chance to set
32# WARNS.  If it doesn't do so, we may freely pull a DEFAULTWARNS if it's set
33# and use that.  This allows us to default WARNS to 6 for src builds without
34# needing to set the default in various Makefile.inc.
35.if !defined(WARNS) && defined(DEFAULTWARNS)
36WARNS=	${DEFAULTWARNS}
37.endif
38
39# -pedantic is problematic because it also imposes namespace restrictions
40#CFLAGS+=	-pedantic
41.if defined(WARNS)
42.if ${WARNS} >= 1
43CWARNFLAGS+=	-Wsystem-headers
44.if ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no"
45CWARNFLAGS+=	-Werror
46.endif # ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no"
47.endif # WARNS >= 1
48.if ${WARNS} >= 2
49CWARNFLAGS+=	-Wall -Wno-format-y2k
50.endif # WARNS >= 2
51.if ${WARNS} >= 3
52CWARNFLAGS+=	-W -Wno-unused-parameter
53.if ${COMPILER_TYPE} == "clang"
54CWARNFLAGS+=	-Wstrict-prototypes
55.endif
56CWARNFLAGS+=	-Wmissing-prototypes -Wpointer-arith
57.endif # WARNS >= 3
58.if ${WARNS} >= 4
59CWARNFLAGS+=	-Wreturn-type -Wcast-qual -Wwrite-strings -Wswitch -Wshadow\
60		-Wunused-parameter
61.if !defined(NO_WCAST_ALIGN) && !defined(NO_WCAST_ALIGN.${COMPILER_TYPE})
62CWARNFLAGS+=	-Wcast-align
63.endif # !NO_WCAST_ALIGN !NO_WCAST_ALIGN.${COMPILER_TYPE}
64.endif # WARNS >= 4
65.if ${WARNS} >= 6
66CWARNFLAGS+=	-Wchar-subscripts -Wnested-externs \
67		-Wold-style-definition
68.if !defined(NO_WMISSING_VARIABLE_DECLARATIONS)
69CWARNFLAGS.clang+=	-Wmissing-variable-declarations
70.endif
71.if !defined(NO_WTHREAD_SAFETY)
72CWARNFLAGS.clang+=	-Wthread-safety
73.endif
74.endif # WARNS >= 6
75.if ${WARNS} >= 2 && ${WARNS} <= 4
76# XXX Delete -Wuninitialized by default for now -- the compiler doesn't
77# XXX always get it right.
78CWARNFLAGS+=	-Wno-uninitialized
79.endif # WARNS >=2 && WARNS <= 4
80CWARNFLAGS+=	-Wno-pointer-sign
81.if !defined(NO_WDATE_TIME)
82CWARNFLAGS+=	-Wdate-time
83.endif # NO_WDATE_TIME
84# Clang has more warnings enabled by default, and when using -Wall, so if WARNS
85# is set to low values, these have to be disabled explicitly.
86.if ${WARNS} <= 6
87CWARNFLAGS.clang+=	-Wno-empty-body -Wno-string-plus-int
88CWARNFLAGS.clang+=	-Wno-unused-const-variable
89.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 150000
90CWARNFLAGS.clang+=	-Wno-error=unused-but-set-parameter
91.endif
92.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 190000
93# Similar to gcc >= 8.1 -Wno-error=cast-function-type below
94CWARNFLAGS.clang+=	-Wno-error=cast-function-type-mismatch
95.endif
96.endif # WARNS <= 6
97.if ${WARNS} <= 3
98CWARNFLAGS.clang+=	-Wno-tautological-compare -Wno-unused-value\
99		-Wno-parentheses-equality -Wno-unused-function -Wno-enum-conversion
100CWARNFLAGS.clang+=	-Wno-unused-local-typedef
101CWARNFLAGS.clang+=	-Wno-address-of-packed-member
102.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 90100
103CWARNFLAGS.gcc+=	-Wno-address-of-packed-member
104.endif
105.endif # WARNS <= 3
106.if ${WARNS} <= 2
107CWARNFLAGS.clang+=	-Wno-switch -Wno-switch-enum -Wno-knr-promoted-parameter
108.endif # WARNS <= 2
109.if ${WARNS} <= 1
110CWARNFLAGS.clang+=	-Wno-parentheses
111.endif # WARNS <= 1
112.if defined(NO_WARRAY_BOUNDS)
113CWARNFLAGS.clang+=	-Wno-array-bounds
114.endif # NO_WARRAY_BOUNDS
115.if defined(NO_WMISLEADING_INDENTATION) && \
116    ((${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 100000) || \
117      ${COMPILER_TYPE} == "gcc")
118CWARNFLAGS+=		-Wno-misleading-indentation
119.endif # NO_WMISLEADING_INDENTATION
120.if ${COMPILER_VERSION} >= 130000
121NO_WUNUSED_BUT_SET_VARIABLE=	-Wno-unused-but-set-variable
122.endif
123.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 140000
124NO_WBITWISE_INSTEAD_OF_LOGICAL=	-Wno-bitwise-instead-of-logical
125.endif
126.if ${COMPILER_TYPE} == "clang" && ${COMPILER_VERSION} >= 150000
127NO_WARRAY_PARAMETER=	-Wno-array-parameter
128NO_WSTRICT_PROTOTYPES=	-Wno-strict-prototypes
129NO_WDEPRECATED_NON_PROTOTYPE=-Wno-deprecated-non-prototype
130.endif
131.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 50200
132NO_WUNUSED_BUT_SET_VARIABLE=-Wno-unused-but-set-variable
133.endif
134.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 100100
135NO_WZERO_LENGTH_BOUNDS=	-Wno-zero-length-bounds
136.endif
137.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 110100
138NO_WARRAY_PARAMETER=	-Wno-array-parameter
139.endif
140.if ${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 120100
141NO_WUSE_AFTER_FREE=	-Wno-use-after-free
142NO_WDANGLING_POINTER=	-Wno-dangling-pointer
143.endif
144.endif # WARNS
145
146.if defined(FORMAT_AUDIT)
147WFORMAT=	1
148.endif # FORMAT_AUDIT
149.if defined(WFORMAT)
150.if ${WFORMAT} > 0
151#CWARNFLAGS+=	-Wformat-nonliteral -Wformat-security -Wno-format-extra-args
152CWARNFLAGS+=	-Wformat=2 -Wno-format-extra-args
153.if ${WARNS:U0} <= 3
154CWARNFLAGS.clang+=	-Wno-format-nonliteral
155.endif # WARNS <= 3
156.if ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no"
157CWARNFLAGS+=	-Werror
158.endif # ${MK_WERROR} != "no" && ${MK_WERROR.${COMPILER_TYPE}:Uyes} != "no"
159.endif # WFORMAT > 0
160.endif # WFORMAT
161.if defined(NO_WFORMAT) || defined(NO_WFORMAT.${COMPILER_TYPE})
162CWARNFLAGS+=	-Wno-format
163.endif # NO_WFORMAT || NO_WFORMAT.${COMPILER_TYPE}
164
165# GCC
166# We should clean up warnings produced with these flags.
167# They were originally added as a quick hack to enable gcc5/6.
168# The base system requires at least GCC 6.4, but some ports
169# use this file with older compilers.  Request an exprun
170# before changing these.
171.if ${COMPILER_TYPE} == "gcc"
172# GCC 5.2.0
173.if ${COMPILER_VERSION} >= 50200
174CWARNFLAGS+=	-Wno-error=address			\
175		-Wno-error=array-bounds			\
176		-Wno-error=attributes			\
177		-Wno-error=bool-compare			\
178		-Wno-error=cast-align			\
179		-Wno-error=clobbered			\
180		-Wno-error=deprecated-declarations	\
181		-Wno-error=enum-compare			\
182		-Wno-error=extra			\
183		-Wno-error=logical-not-parentheses	\
184		-Wno-error=strict-aliasing		\
185		-Wno-error=uninitialized		\
186		-Wno-error=unused-function		\
187		-Wno-error=unused-value
188.endif
189
190# GCC 6.1.0
191.if ${COMPILER_VERSION} >= 60100
192CWARNFLAGS+=	-Wno-error=empty-body			\
193		-Wno-error=maybe-uninitialized		\
194		-Wno-error=nonnull-compare		\
195		-Wno-error=shift-negative-value		\
196		-Wno-error=tautological-compare		\
197		-Wno-error=unused-const-variable
198.endif
199
200# GCC 7.1.0
201.if ${COMPILER_VERSION} >= 70100
202CWARNFLAGS+=	-Wno-error=bool-operation		\
203		-Wno-error=deprecated			\
204		-Wno-error=expansion-to-defined		\
205		-Wno-error=format-overflow		\
206		-Wno-error=format-truncation		\
207		-Wno-error=implicit-fallthrough		\
208		-Wno-error=int-in-bool-context		\
209		-Wno-error=memset-elt-size		\
210		-Wno-error=noexcept-type		\
211		-Wno-error=nonnull			\
212		-Wno-error=pointer-compare		\
213		-Wno-error=stringop-overflow
214.endif
215
216# GCC 8.1.0
217.if ${COMPILER_VERSION} >= 80100
218CWARNFLAGS+=	-Wno-error=aggressive-loop-optimizations	\
219		-Wno-error=cast-function-type			\
220		-Wno-error=catch-value				\
221		-Wno-error=multistatement-macros		\
222		-Wno-error=restrict				\
223		-Wno-error=sizeof-pointer-memaccess		\
224		-Wno-error=stringop-truncation
225CXXWARNFLAGS+=	-Wno-error=class-memaccess
226.endif
227
228# GCC 9.2.0
229.if ${COMPILER_VERSION} >= 90200
230.if ${MACHINE_ARCH} == "i386"
231CWARNFLAGS+=	-Wno-error=overflow
232.endif
233.endif
234
235# GCC 12.1.0
236.if ${COMPILER_VERSION} >= 120100
237# These warnings are raised by headers in libc++ so are disabled
238# globally for all C++
239CXXWARNFLAGS+=	-Wno-literal-suffix 			\
240		-Wno-error=unknown-pragmas
241.endif
242
243# GCC 13.1.0
244.if ${COMPILER_VERSION} >= 130100
245# These warnings are raised by headers in libc++ so are disabled
246# globally for all C++
247CXXWARNFLAGS+=	-Wno-dangling-reference
248.endif
249
250# GCC produces false positives for functions that switch on an
251# enum (GCC bug 87950)
252CWARNFLAGS+=	-Wno-return-type
253
254# GCC's own arm_neon.h triggers various warnings
255.if ${MACHINE_CPUARCH} == "aarch64"
256CWARNFLAGS+=	-Wno-system-headers
257.endif
258.endif	# gcc
259
260# How to handle FreeBSD custom printf format specifiers.
261.if ${COMPILER_TYPE} == "clang" || \
262    (${COMPILER_TYPE} == "gcc" && ${COMPILER_VERSION} >= 120100)
263FORMAT_EXTENSIONS=	-D__printf__=__freebsd_kprintf__
264.else
265FORMAT_EXTENSIONS=	-fformat-extensions
266.endif
267
268.if defined(IGNORE_PRAGMA)
269CWARNFLAGS+=	-Wno-unknown-pragmas
270.endif # IGNORE_PRAGMA
271
272# This warning is utter nonsense
273CFLAGS+=	-Wno-format-zero-length
274
275.if ${COMPILER_TYPE} == "clang"
276# The headers provided by clang are incompatible with the FreeBSD headers.
277# If the version of clang is not one that has been patched to omit the
278# incompatible headers, we need to compile with -nobuiltininc and add the
279# resource dir to the end of the search paths. This ensures that headers such as
280# immintrin.h are still found but stddef.h, etc. are picked up from FreeBSD.
281#
282# XXX: This is a hack to support complete external installs of clang while
283# we work to synchronize our decleration guards with those in the clang tree.
284.if ${MK_CLANG_BOOTSTRAP:Uno} == "no" && \
285    ${COMPILER_RESOURCE_DIR} != "unknown" && !defined(BOOTSTRAPPING)
286CFLAGS+=-nobuiltininc -idirafter ${COMPILER_RESOURCE_DIR}/include
287.endif
288.endif
289
290CLANG_OPT_SMALL= -mstack-alignment=8 -mllvm -inline-threshold=3
291.if ${COMPILER_VERSION} < 130000
292CLANG_OPT_SMALL+= -mllvm -simplifycfg-dup-ret
293.endif
294CLANG_OPT_SMALL+= -mllvm -enable-load-pre=false
295CFLAGS.clang+=	 -Qunused-arguments
296
297# XXX This should be defaulted to 2 when WITH_SSP is in use after further
298# testing and soak time.
299FORTIFY_SOURCE?=	0
300.if ${MK_SSP} != "no"
301# Don't use -Wstack-protector as it breaks world with -Werror.
302.if ${COMPILER_FEATURES:Mstackclash}
303SSP_CFLAGS?=	-fstack-protector-strong -fstack-clash-protection
304.else
305SSP_CFLAGS?=	-fstack-protector-strong
306.endif
307CFLAGS+=	${SSP_CFLAGS}
308.endif # SSP
309.if ${FORTIFY_SOURCE} > 0
310CFLAGS+=	-D_FORTIFY_SOURCE=${FORTIFY_SOURCE}
311CXXFLAGS+=	-D_FORTIFY_SOURCE=${FORTIFY_SOURCE}
312.endif
313
314# Additional flags passed in CFLAGS and CXXFLAGS when MK_DEBUG_FILES is
315# enabled.
316DEBUG_FILES_CFLAGS?= -g -gz=zlib
317
318# Allow user-specified additional warning flags, plus compiler and file
319# specific flag overrides, unless we've overridden this...
320.if ${MK_WARNS} != "no"
321CFLAGS+=	${CWARNFLAGS:M*} ${CWARNFLAGS.${COMPILER_TYPE}}
322CFLAGS+=	${CWARNFLAGS.${.IMPSRC:T}}
323CXXFLAGS+=	${CXXWARNFLAGS:M*} ${CXXWARNFLAGS.${COMPILER_TYPE}}
324CXXFLAGS+=	${CXXWARNFLAGS.${.IMPSRC:T}}
325.endif
326
327CFLAGS+=	 ${CFLAGS.${COMPILER_TYPE}}
328CXXFLAGS+=	 ${CXXFLAGS.${COMPILER_TYPE}}
329
330AFLAGS+=	${AFLAGS.${.IMPSRC:T}}
331AFLAGS+=	${AFLAGS.${.TARGET:T}}
332ACFLAGS+=	${ACFLAGS.${.IMPSRC:T}}
333ACFLAGS+=	${ACFLAGS.${.TARGET:T}}
334CFLAGS+=	${CFLAGS.${.IMPSRC:T}}
335CXXFLAGS+=	${CXXFLAGS.${.IMPSRC:T}}
336
337LDFLAGS+=	${LDFLAGS.${LINKER_TYPE}}
338
339# Only allow .TARGET when not using PROGS as it has the same syntax
340# per PROG which is ambiguous with this syntax. This is only needed
341# for PROG_VARS vars.
342#
343# Some directories (currently just clang) also need to disable this since
344# CFLAGS.${COMPILER_TYPE}, CFLAGS.${.IMPSRC:T} and CFLAGS.${.TARGET:T} all live
345# in the same namespace, meaning that, for example, GCC builds of clang pick up
346# CFLAGS.clang via CFLAGS.${.TARGET:T} and thus try to pass Clang-specific
347# flags. Ideally the different sources of CFLAGS would be namespaced to avoid
348# collisions.
349.if !defined(_RECURSING_PROGS) && !defined(NO_TARGET_FLAGS)
350.if ${MK_WARNS} != "no"
351CFLAGS+=	${CWARNFLAGS.${.TARGET:T}}
352.endif
353CFLAGS+=	${CFLAGS.${.TARGET:T}}
354CXXFLAGS+=	${CXXFLAGS.${.TARGET:T}}
355LDFLAGS+=	${LDFLAGS.${.TARGET:T}}
356LDADD+=		${LDADD.${.TARGET:T}}
357LIBADD+=	${LIBADD.${.TARGET:T}}
358.endif
359
360.if defined(SRCTOP)
361# Prevent rebuilding during install to support read-only objdirs.
362.if ${.TARGETS:M*install*} == ${.TARGETS} && empty(.MAKE.MODE:Mmeta)
363CFLAGS+=	ERROR-tried-to-rebuild-during-make-install
364.endif
365.endif
366
367# Please keep this if in sync with kern.mk
368.if ${LD} != "ld" && (${CC:[1]:H} != ${LD:[1]:H} || ${LD:[1]:T} != "ld")
369# Add -fuse-ld=${LD} if $LD is in a different directory or not called "ld".
370.if ${COMPILER_TYPE} == "clang"
371# Note: Clang does not like relative paths for ld so we map ld.lld -> lld.
372.if ${COMPILER_VERSION} >= 120000
373LDFLAGS+=	--ld-path=${LD:[1]:S/^ld.//1W}
374.else
375LDFLAGS+=	-fuse-ld=${LD:[1]:S/^ld.//1W}
376.endif
377.elif ${COMPILER_TYPE} == "gcc"
378# GCC does not support an absolute path for -fuse-ld so we just print this
379# warning instead and let the user add the required symlinks.
380# However, we can avoid this warning if -B is set appropriately (e.g. for
381# CROSS_TOOLCHAIN=...-gcc).
382.if !(${LD:[1]:T} == "ld" && ${CC:tw:M-B${LD:[1]:H}/})
383.warning LD (${LD}) is not the default linker for ${CC} but -fuse-ld= is not supported
384.endif
385.endif
386.endif
387
388# Tell bmake not to mistake standard targets for things to be searched for
389# or expect to ever be up-to-date.
390PHONY_NOTMAIN = analyze afterdepend afterinstall all beforedepend beforeinstall \
391		beforelinking build build-tools buildconfig buildfiles \
392		buildincludes check checkdpadd clean cleandepend cleandir \
393		cleanobj configure depend distclean distribute exe \
394		files html includes install installconfig installdirs \
395		installfiles installincludes lint obj objlink objs objwarn \
396		realinstall tags whereobj
397
398# we don't want ${PROG} to be PHONY
399.PHONY: ${PHONY_NOTMAIN:N${PROG:U}}
400.NOTMAIN: ${PHONY_NOTMAIN:Nall}
401
402.if ${MK_STAGING} != "no"
403.if defined(_SKIP_BUILD) || (!make(all) && !make(clean*) && !make(*clean))
404_SKIP_STAGING?= yes
405.endif
406.if ${_SKIP_STAGING:Uno} == "yes"
407staging stage_libs stage_files stage_as stage_links stage_symlinks:
408.else
409# allow targets like beforeinstall to be leveraged
410DESTDIR= ${STAGE_OBJTOP}
411.export DESTDIR
412
413.if target(beforeinstall)
414.if !empty(_LIBS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
415staging: beforeinstall
416.endif
417.endif
418
419# normally only libs and includes are staged
420.if ${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG)
421STAGE_DIR.prog= ${STAGE_OBJTOP}${BINDIR}
422
423.if !empty(PROG)
424.if defined(PROGNAME)
425STAGE_AS_SETS+= prog
426STAGE_AS_${PROG}= ${PROGNAME}
427stage_as.prog: ${PROG}
428.else
429STAGE_SETS+= prog
430stage_files.prog: ${PROG}
431STAGE_TARGETS+= stage_files
432.endif
433.endif
434.endif
435
436.if !empty(_LIBS) && !defined(INTERNALLIB)
437.if defined(SHLIBDIR) && ${SHLIBDIR} != ${LIBDIR} && ${_LIBS:Uno:M*.so.*} != ""
438STAGE_SETS+= shlib
439STAGE_DIR.shlib= ${STAGE_OBJTOP}${SHLIBDIR}
440STAGE_FILES.shlib+= ${_LIBS:M*.so.*}
441stage_files.shlib: ${_LIBS:M*.so.*}
442.endif
443
444.if defined(SHLIB_LINK) && commands(${SHLIB_LINK:R}.ld)
445STAGE_AS_SETS+= ldscript
446STAGE_AS.ldscript+= ${SHLIB_LINK:R}.ld
447stage_as.ldscript: ${SHLIB_LINK:R}.ld
448STAGE_DIR.ldscript = ${STAGE_LIBDIR}
449STAGE_AS_${SHLIB_LINK:R}.ld:= ${SHLIB_LINK}
450NO_SHLIB_LINKS=
451.endif
452
453.if defined(STATIC_LDSCRIPT) && target(lib${LIB}.ald)
454STAGE_AS_SETS+= ald
455STAGE_DIR.ald = ${STAGE_LIBDIR}
456STAGE_AS.ald+= lib${LIB}.ald
457STAGE_AS_lib${LIB}.ald = lib${LIB}.a
458stage_as.ald: lib${LIB}.ald
459.endif
460
461.if target(stage_files.shlib)
462stage_libs: ${_LIBS}
463.if defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
464stage_files.shlib: ${SHLIB_NAME}.symbols
465.endif
466.else
467stage_libs: ${_LIBS}
468.endif
469.if defined(SHLIB_NAME) && defined(DEBUG_FLAGS) && target(${SHLIB_NAME}.symbols)
470stage_libs: ${SHLIB_NAME}.symbols
471.endif
472
473.endif
474
475.if !empty(INCS) || !empty(INCSGROUPS) && target(buildincludes)
476.if !defined(NO_BEFOREBUILD_INCLUDES)
477stage_includes: buildincludes
478beforebuild: stage_includes
479.endif
480.endif
481
482.for t in stage_libs stage_files stage_as
483.if target($t)
484STAGE_TARGETS+= $t
485.endif
486.endfor
487
488.if !empty(STAGE_AS_SETS)
489STAGE_TARGETS+= stage_as
490.endif
491
492.if !empty(STAGE_TARGETS) || (${MK_STAGING_PROG} != "no" && !defined(INTERNALPROG))
493
494.if !empty(LINKS)
495STAGE_TARGETS+= stage_links
496.if ${MAKE_VERSION} < 20131001
497stage_links.links: ${_LIBS} ${PROG}
498.endif
499STAGE_SETS+= links
500STAGE_LINKS.links= ${LINKS}
501.endif
502
503.if !empty(SYMLINKS)
504STAGE_TARGETS+= stage_symlinks
505STAGE_SETS+= links
506STAGE_SYMLINKS.links= ${SYMLINKS}
507.endif
508
509.endif
510
511.include <meta.stage.mk>
512.endif
513.endif
514
515.if defined(META_TARGETS)
516.for _tgt in ${META_TARGETS}
517.if target(${_tgt})
518${_tgt}: ${META_DEPS}
519.endif
520.endfor
521.endif
522
523# we are generally the last makefile read
524CFLAGS+= ${CFLAGS_LAST}
525CXXFLAGS+= ${CXXFLAGS_LAST}
526LDFLAGS+= ${LDFLAGS_LAST}
527