1 # Copyright (C) 1991-2003,2004,2005,2006,2007,2008,2009,2010,2011,2012
2 # Free Software Foundation, Inc.
3 # This file is part of the GNU C Library.
5 # The GNU C Library is free software; you can redistribute it and/or
6 # modify it under the terms of the GNU Lesser General Public
7 # License as published by the Free Software Foundation; either
8 # version 2.1 of the License, or (at your option) any later version.
10 # The GNU C Library is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # Lesser General Public License for more details.
15 # You should have received a copy of the GNU Lesser General Public
16 # License along with the GNU C Library; if not, see
17 # <http://www.gnu.org/licenses/>.
20 # Makefile configuration options for the GNU C library.
23 This makefile requires GNU Make.
26 all: # Make this the default goal
28 ifneq "$(origin +included-Makeconfig)" "file"
30 +included-Makeconfig := yes
36 # $(common-objdir) is the place to put objects and
37 # such that are not specific to a single subdir.
39 objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/)
40 common-objpfx = $(objdir)/
41 common-objdir = $(objdir)
43 objdir must be defined by the build-directory Makefile.
46 # Root of the sysdeps tree.
47 sysdep_dir := $(..)sysdeps
48 export sysdep_dir := $(sysdep_dir)
50 # Get the values defined by options to `configure'.
51 include $(common-objpfx)config.make
53 # What flags to give to sources which call user provided callbacks
54 uses-callbacks = $(exceptions)
56 # What flags to give to tests which test stack alignment
57 stack-align-test-flags =
59 # Complete path to sysdep dirs.
60 # `configure' writes a definition of `config-sysdirs' in `config.make'.
61 sysdirs := $(foreach D,$(config-sysdirs),$(firstword $(filter /%,$D) $(..)$D))
63 # Add-ons that contribute sysdeps trees get added to the include list
64 # after sysdeps/generic. This makes #include <sysdeps/...> work right
65 # to find specific add-on files without assuming the add-on directory name.
66 # It also means that headers can go into an add-on's base directory
67 # instead of the add-on needing a sysdeps/generic of its own.
68 sysdeps-srcdirs := $(foreach add-on,$(sysdeps-add-ons),\
69 $(firstword $(filter /%,$(add-on)) \
71 +sysdep_dirs = $(sysdirs) $(sysdeps-srcdirs)
73 +sysdep_dirs := $(objdir) $(+sysdep_dirs)
76 # Run config.status to update config.make and config.h. We don't show the
77 # dependence of config.h to Make, because it is only touched when it
78 # changes and so config.status would be run every time; the dependence of
79 # config.make should suffice to force regeneration and re-exec, and the new
80 # image will notice if config.h changed.
81 $(common-objpfx)config.make: $(common-objpfx)config.status \
82 $(..)config.make.in $(..)config.h.in
83 cd $(<D); $(SHELL) $(<F)
85 # Find all the add-on and sysdeps configure fragments, to make sure we
86 # re-run configure when any of them changes.
87 $(common-objpfx)config.status: $(..)version.h $(..)configure \
88 $(foreach dir,$(sysdirs),\
89 $(wildcard $(dir)/Implies) \
91 $(firstword $(wildcard \
92 $(addprefix $(dir)/,configure configure.in))))) \
94 $(foreach add-on,$(add-ons),\
95 $(firstword $(wildcard \
96 $(addprefix $(firstword $(filter /%,$(add-on)) $(..)$(add-on))/,\
97 configure configure.in)))))
98 @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
99 echo The GNU C library has not been configured. >&2; \
100 echo Run \`configure\' to configure it before building. >&2; \
101 echo Try \`configure --help\' for more details. >&2; \
104 # We don't want CPPFLAGS to be exported to the command running configure.
107 # Get the user's configuration parameters.
108 ifneq ($(wildcard $(..)configparms),)
109 include $(..)configparms
112 ifneq ($(wildcard $(common-objpfx)configparms),)
113 include $(common-objpfx)configparms
118 #### These are the configuration variables. You can define values for
119 #### the variables below in the file `configparms'.
120 #### Do NOT edit this file.
124 # Common prefix for machine-independent installation directories.
125 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
129 # Decide whether we shall build the programs or not. We always do this
130 # unless the user tells us (in configparms) or we are building for a
132 ifndef build-programs
133 ifneq ($(config-os),none)
140 # Common prefix for machine-dependent installation directories.
141 ifeq ($(origin exec_prefix),undefined)
142 exec_prefix = $(prefix)
145 # Where to install the library and object files.
147 libdir = $(exec_prefix)/lib
149 inst_libdir = $(install_root)$(libdir)
151 # Where to install the shared library and dynamic linker.
153 slibdir = $(exec_prefix)/lib
155 inst_slibdir = $(install_root)$(slibdir)
157 # Prefix to put on files installed in $(libdir). For libraries `libNAME.a',
158 # the prefix is spliced between `lib' and the name, so the linker switch
159 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
160 # just prepended to the whole file name.
161 ifeq ($(origin libprefix),undefined)
165 # Where to install the header files.
167 includedir = $(prefix)/include
169 inst_includedir = $(install_root)$(includedir)
171 # Where to install machine-independent data files.
172 # These are the timezone database, and the locale database.
174 datadir = $(prefix)/share
176 inst_datadir = $(install_root)$(datadir)
178 # Where to install the timezone data files (which are machine-independent).
180 zonedir = $(datadir)/zoneinfo
182 inst_zonedir = $(install_root)$(zonedir)
184 # Where to install the locale files.
186 localedir = $(libdir)/locale
188 inst_localedir = $(install_root)$(localedir)
190 # Where to install the message catalog data files (which are
191 # machine-independent).
193 msgcatdir = $(datadir)/locale
195 inst_msgcatdir = $(install_root)$(msgcatdir)
197 # Where to install the locale charmap source files.
199 i18ndir = $(datadir)/i18n
201 inst_i18ndir = $(install_root)$(i18ndir)
203 # Where to install the shared object for charset transformation.
205 gconvdir = $(libdir)/gconv
207 inst_gconvdir = $(install_root)$(gconvdir)
209 # Where to install programs.
211 bindir = $(exec_prefix)/bin
213 inst_bindir = $(install_root)$(bindir)
215 # Where to install internal programs.
217 libexecdir = $(exec_prefix)/libexec
219 inst_libexecdir = $(install_root)$(libexecdir)
221 # Where to install administrative programs.
223 rootsbindir = $(exec_prefix)/sbin
225 inst_rootsbindir = $(install_root)$(rootsbindir)
228 sbindir = $(exec_prefix)/sbin
230 inst_sbindir = $(install_root)$(sbindir)
232 # Where to install the Info files.
234 infodir = $(prefix)/info
236 inst_infodir = $(install_root)$(infodir)
238 # Where to install audit libraries.
240 auditdir = $(libdir)/audit
242 inst_auditdir = $(install_root)$(auditdir)
244 # Where to install default configuration files. These include the local
245 # timezone specification and network data base files.
247 sysconfdir = $(prefix)/etc
249 inst_sysconfdir = $(install_root)$(sysconfdir)
251 # Directory for the database files and Makefile for nss_db.
253 vardbdir = $(localstatedir)/db
255 inst_vardbdir = $(install_root)$(vardbdir)
257 # Where to install the "localtime" timezone file; this is the file whose
258 # contents $(localtime) specifies. If this is a relative pathname, it is
259 # relative to $(zonedir). It is a good idea to put this somewhere
260 # other than there, so the zoneinfo directory contains only universal data,
261 # localizing the configuration data elsewhere.
262 ifndef localtime-file
263 localtime-file = $(sysconfdir)/localtime
266 # What to use for leap second specifications in compiling the default
267 # timezone files. Set this to `/dev/null' for no leap second handling as
268 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
269 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
270 # This variable determines the default: if it's `/dev/null',
271 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
273 leapseconds = /dev/null
276 # What timezone's DST rules should be used when a POSIX-style TZ
277 # environment variable doesn't specify any rules. For 1003.1 compliance
278 # this timezone must use rules that are as U.S. federal law defines DST.
279 # Run `make -C time echo-zonenames' to see a list of available zone names.
280 # This setting can be changed with `zic -p TIMEZONE' at any time.
281 # If you want POSIX.1 compatibility, use `America/New_York'.
283 posixrules = America/New_York
286 # Where to install the "posixrules" timezone file; this is file
287 # whose contents $(posixrules) specifies. If this is a relative
288 # pathname, it is relative to $(zonedir).
289 ifndef posixrules-file
290 posixrules-file = posixrules
294 # Directory where your system's native header files live.
295 # This is used on Unix systems to generate some GNU libc header files.
297 sysincludedir = /usr/include
301 # Commands to install files.
303 INSTALL_DATA = $(INSTALL) -m 644
305 ifndef INSTALL_SCRIPT
306 INSTALL_SCRIPT = $(INSTALL)
308 ifndef INSTALL_PROGRAM
309 INSTALL_PROGRAM = $(INSTALL)
316 # The name of the C compiler.
317 # If you've got GCC, and it works, use it.
318 ifeq ($(origin CC),default)
322 # The name of the C compiler to use for compilations of programs to run on
323 # the host that is building the library. If you set CC to a
324 # cross-compiler, you must set this to the normal compiler.
329 # Default flags to pass the C compiler.
330 ifndef default_cflags
331 ifeq ($(release),stable)
332 default_cflags := -g -O2
334 default_cflags := -g -O
338 # Flags to pass the C compiler when assembling preprocessed assembly code
339 # (`.S' files). On some systems the assembler doesn't understand the `#' line
340 # directives the preprocessor produces. If you have troubling compiling
341 # assembly code, try using -P here to suppress these directives.
346 as-needed := -Wl,--as-needed
347 no-as-needed := -Wl,--no-as-needed
349 # Must be supported by the linker.
350 no-whole-archive = -Wl,--no-whole-archive
351 whole-archive = -Wl,--whole-archive
353 # Installed name of the startup code.
354 # The ELF convention is that the startfile is called crt1.o
355 start-installed-name = crt1.o
356 # On systems that do not need a special startfile for statically linked
357 # binaries, simply set it to the normal name.
358 ifndef static-start-installed-name
359 static-start-installed-name = $(start-installed-name)
362 ifeq (yesyes,$(build-shared)$(have-z-combreloc))
363 combreloc-LDFLAGS = -Wl,-z,combreloc
364 LDFLAGS.so += $(combreloc-LDFLAGS)
365 LDFLAGS-rtld += $(combreloc-LDFLAGS)
368 relro-LDFLAGS = -Wl,-z,relro
369 LDFLAGS.so += $(relro-LDFLAGS)
370 LDFLAGS-rtld += $(relro-LDFLAGS)
372 ifeq (yes,$(have-hash-style))
373 # For the time being we unconditionally use 'both'. At some time we
374 # should declare statically linked code as 'out of luck' and compile
375 # with --hash-style=gnu only.
376 hashstyle-LDFLAGS = -Wl,--hash-style=both
377 LDFLAGS.so += $(hashstyle-LDFLAGS)
378 LDFLAGS-rtld += $(hashstyle-LDFLAGS)
381 # Command for linking PIE programs with the C library.
383 +link-pie = $(CC) -pie -Wl,-O1 -nostdlib -nostartfiles -o $@ \
384 $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
385 $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
386 $(addprefix $(csu-objpfx),S$(start-installed-name)) \
387 $(+preinit) $(+prectorS) \
388 $(filter-out $(addprefix $(csu-objpfx),start.o \
389 S$(start-installed-name))\
390 $(+preinit) $(link-extra-libs) \
391 $(common-objpfx)libc% $(+postinit),$^) \
392 $(link-extra-libs) $(link-libc) $(+postctorS) $(+postinit)
394 # Command for statically linking programs with the C library.
396 +link-static-before-libc = $(CC) -nostdlib -nostartfiles -static -o $@ \
397 $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
398 $(addprefix $(csu-objpfx),$(static-start-installed-name)) \
399 $(+preinit) $(+prectorT) \
400 $(filter-out $(addprefix $(csu-objpfx),start.o \
401 $(start-installed-name))\
402 $(+preinit) $(link-extra-libs-static) \
403 $(common-objpfx)libc% $(+postinit),$^) \
404 $(link-extra-libs-static)
405 +link-static-after-libc = $(+postctorT) $(+postinit)
406 +link-static = $(+link-static-before-libc) $(link-libc-static) \
407 $(+link-static-after-libc)
408 +link-static-tests = $(+link-static-before-libc) $(link-libc-static-tests) \
409 $(+link-static-after-libc)
411 # Commands for linking programs with the C library.
413 ifeq (yes,$(build-shared))
414 +link-before-libc = $(CC) -nostdlib -nostartfiles -o $@ \
415 $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
416 $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
417 $(addprefix $(csu-objpfx),$(start-installed-name)) \
418 $(+preinit) $(+prector) \
419 $(filter-out $(addprefix $(csu-objpfx),start.o \
420 $(start-installed-name))\
421 $(+preinit) $(link-extra-libs) \
422 $(common-objpfx)libc% $(+postinit),$^) \
424 +link-after-libc = $(+postctor) $(+postinit)
425 +link = $(+link-before-libc) $(link-libc) $(+link-after-libc)
426 +link-tests = $(+link-before-libc) $(link-libc-tests) $(+link-after-libc)
428 +link = $(+link-static)
429 +link-tests = $(+link-static-tests)
432 # Command for statically linking bounded-pointer programs with the C library.
434 +link-bounded = $(CC) -nostdlib -nostartfiles -static -fbounded-pointers -o $@ \
435 $(sysdep-LDFLAGS) $(LDFLAGS) \
436 $(addprefix $(csu-objpfx),b$(static-start-installed-name)) \
437 $(+preinit) $(+prectorT) \
438 $(filter-out $(addprefix $(csu-objpfx),start.ob \
439 $(start-installed-name))\
440 $(+preinit) $(link-extra-libs-bounded) \
441 $(common-objpfx)libc% $(+postinit),$^) \
442 $(link-extra-libs-bounded) $(link-libc-bounded) $(+postctorT) $(+postinit)
444 ifndef config-LDFLAGS
445 ifeq (yes,$(build-shared))
446 config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
450 ifeq (yes,$(build-shared))
451 # We need the versioned name of libc.so in the deps of $(others) et al
452 # so that the symlink to libc.so is created before anything tries to
453 # run the linked programs.
454 link-libc-before-gnulib = -Wl,-rpath-link=$(rpath-link) \
455 $(common-objpfx)libc.so$(libc.so-version) \
456 $(common-objpfx)$(patsubst %,$(libtype.oS),c) \
457 $(as-needed) $(common-objpfx)elf/ld.so $(no-as-needed)
458 link-libc = $(link-libc-before-gnulib) $(gnulib)
459 link-libc-tests = $(link-libc-before-gnulib) $(gnulib-tests)
460 # This is how to find at build-time things that will be installed there.
461 rpath-dirs = math elf dlfcn nss nis rt resolv crypt
463 $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
465 link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
466 link-libc-tests = $(common-objpfx)libc.a $(otherlibs) $(gnulib-tests) $(common-objpfx)libc.a $(gnulib-tests)
470 elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf)
472 # Differences in the linkers on the various platforms.
473 LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
474 LDFLAGS-soname-fname = -Wl,-soname,$(@F)
475 LDFLAGS-rdynamic = -rdynamic
476 LDFLAGS-Bsymbolic = -Bsymbolic
478 # Choose the default search path for the dynamic linker based on
479 # where we will install libraries.
480 ifneq ($(libdir),$(slibdir))
481 default-rpath = $(slibdir):$(libdir)
483 default-rpath = $(libdir)
486 ifndef link-extra-libs
487 link-extra-libs = $(LDLIBS-$(@F))
488 link-extra-libs-static = $(link-extra-libs)
489 link-extra-libs-bounded = $(link-extra-libs)
492 # The static libraries.
493 link-libc-static = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib) -Wl,--end-group
494 link-libc-static-tests = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib-tests) -Wl,--end-group
495 link-libc-bounded = $(common-objpfx)libc_b.a $(gnulib) $(common-objpfx)libc_b.a
497 # How to link against libgcc. Some libgcc functions, such as those
498 # for "long long" arithmetic or software floating point, can always be
499 # built without use of C library headers and do not have any global
500 # state so can safely be linked statically into any executable or
501 # shared library requiring them; these functions are in libgcc.a.
502 # Other functions, relating to exception handling, may require C
503 # library headers to build and it may not be safe to have more than
504 # one copy of them in a process; these functions are only in
505 # libgcc_s.so and libgcc_eh.a.
507 # To avoid circular dependencies when bootstrapping, it is desirable
508 # to avoid use of libgcc_s and libgcc_eh in building glibc. Where any
509 # glibc functionality (in particular, thread cancellation) requires
510 # exception handling, this is implemented through dlopen of libgcc_s
511 # to avoid unnecessary dependencies on libgcc_s by programs not using
512 # that functionality; executables built with glibc do not use
513 # exception handling other than through thread cancellation.
515 # Undefined references to functions from libgcc_eh or libgcc_s may
516 # arise for code built with -fexceptions. In the case of statically
517 # linked programs installed by glibc, unwinding will never actually
518 # occur at runtime and the use of elf/static-stubs.c to resolve these
519 # references is safe. In the case of statically linked test programs
520 # and test programs built with -fexceptions, unwinding may occur in
521 # some cases and it is preferable to link with libgcc_eh or libgcc_s
522 # so that the testing is as similar as possible to how programs will
523 # be built with the installed glibc.
525 # Some architectures have architecture-specific systems for exception
526 # handling that may involve undefined references to
527 # architecture-specific functions. On those architectures,
528 # gnulib-arch and static-gnulib-arch may be defined in sysdeps
529 # makefiles to use additional libraries for linking executables and
530 # shared libraries built by glibc.
532 ifneq ($(have-cc-with-libunwind),yes)
537 libgcc_eh := -Wl,--as-needed -lgcc_s $(libunwind) -Wl,--no-as-needed
539 gnulib = -lgcc $(gnulib-arch)
540 gnulib-tests := -lgcc $(libgcc_eh)
542 # By default, elf/static-stubs.o, instead of -lgcc_eh, is used to
543 # statically link programs. When --disable-shared is used, we use
544 # -lgcc_eh since elf/static-stubs.o isn't sufficient.
545 ifeq (yes,$(build-shared))
546 static-gnulib = -lgcc $(static-gnulib-arch)
548 static-gnulib = -lgcc -lgcc_eh $(static-gnulib-arch)
550 static-gnulib-tests := -lgcc -lgcc_eh $(libunwind)
551 libc.so-gnulib := -lgcc
553 +preinit = $(addprefix $(csu-objpfx),crti.o)
554 +postinit = $(addprefix $(csu-objpfx),crtn.o)
555 +prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbegin.o`
556 +postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
557 # Variants of the two previous definitions for linking PIE programs.
558 +prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o`
559 +postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o`
560 # Variants of the two previous definitions for statically linking programs.
561 +prectorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o`
562 +postctorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
563 +interp = $(addprefix $(elf-objpfx),interp.os)
564 csu-objpfx = $(common-objpfx)csu/
565 elf-objpfx = $(common-objpfx)elf/
567 # How to run a program we just linked with our library.
568 # The program binary is assumed to be $(word 2,$^).
569 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
570 ifeq (yes,$(build-shared))
572 sysdep-library-path = \
573 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
574 $(filter -Wl$(comma)-rpath-link=%,\
575 $(sysdep-LDFLAGS)))))
576 # $(run-via-rtld-prefix) is a command that, when prepended to the name
577 # of a program built with the newly built library, produces a command
578 # that, executed on the host for which the library is built, runs that
579 # program. For the statically-linked %-bp test programs, and for
580 # tests listed in tests-static or xtests-static, it is empty.
581 run-via-rtld-prefix = \
582 $(if $(strip $(filter $(notdir $(built-program-file)), \
583 $(tests-static) $(xtests-static)) \
584 $(filter %-bp,$(built-program-file))),, \
585 $(elf-objpfx)$(rtld-installed-name) \
586 --library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)))
588 run-via-rtld-prefix =
590 # $(run-via-rtld-prefix) is a command that, when prepended to the name
591 # of a program built with the newly built library, produces a command
592 # that, executed on the build system on which "make" is run, runs that
594 run-program-prefix = $(run-via-rtld-prefix)
595 # $(built-program-cmd) is a command that, executed on the build system
596 # on which "make" is run, runs the newly built program that is the
597 # second dependency of the makefile target in which
598 # $(built-program-cmd) is used.
599 built-program-cmd = $(run-via-rtld-prefix) $(built-program-file)
605 # Extra flags to pass to GCC.
606 ifeq ($(all-warnings),yes)
607 +gccwarn := -Wall -Wwrite-strings -Winline -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
609 +gccwarn := -Wall -Wwrite-strings -Winline
611 +gccwarn-c = -Wstrict-prototypes
613 # We do not depend on the address of constants in different files to be
614 # actually different, so allow the compiler to merge them all.
615 +merge-constants = -fmerge-all-constants
617 # We have to assume that glibc functions are called in any rounding
618 # mode and also change the rounding mode in a few functions. So,
619 # disable any optimization that assume default rounding mode.
620 +math-flags = -frounding-math
622 # This is the program that generates makefile dependencies from C source files.
623 # The -MP flag tells GCC >= 3.2 (which we now require) to produce dummy
624 # targets for headers so that removed headers don't break the build.
626 +mkdep = $(CC) -M -MP
629 # The program that makes Emacs-style TAGS files.
632 # The `xgettext' program for producing .pot files from sources.
637 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
638 # perhaps others) to preprocess assembly code in some cases.
641 # To force installation of files even if they are older than the
642 # installed files. This variable is included in the dependency list
643 # of all installation targets.
644 ifeq ($(force-install),yes)
645 +force = force-install
651 #### End of configuration variables.
654 # This tells some versions of GNU make before 3.63 not to export all variables.
657 # We want to echo the commands we're running without
658 # umpteen zillion filenames along with it (we use `...' instead)
659 # but we don't want this echoing done when the user has said
660 # he doesn't want to see commands echoed by using -s.
661 ifneq "$(findstring s,$(MAKEFLAGS))" "" # if -s
662 +cmdecho := echo >/dev/null
667 # These are the flags given to the compiler to tell
668 # it what sort of optimization and/or debugging output to do.
670 # If `CFLAGS' was defined, use that.
672 +cflags := $(filter-out -I%,$(CFLAGS))
676 # If none of the above worked, default to "-g -O".
677 ifeq "$(strip $(+cflags))" ""
678 +cflags := $(default_cflags)
679 endif # $(+cflags) == ""
681 +cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags)
684 # Don't duplicate options if we inherited variables from the parent.
685 +cflags := $(sort $(+cflags))
687 # These are flags given to the C compiler to tell it to look for
688 # include files (including ones given in angle brackets) in the parent
689 # library source directory, in the include directory, and in the
691 +sysdep-includes = $(addprefix -I,$(+sysdep_dirs))
692 +includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \
693 $(+sysdep-includes) $(includes) \
694 $(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes)
696 # Since libio has several internal header files, we use a -I instead
697 # of many little headers in the include directory.
698 libio-include = -I$(..)libio
700 # These are the variables that the implicit compilation rules use.
701 # Note that we can't use -std=* in CPPFLAGS, because it overrides
702 # the implicit -lang-asm and breaks cpp behavior for .S files--notably
703 # it causes cpp to stop predefining __ASSEMBLER__.
704 CPPFLAGS = $(CPPUNDEFS) $(CPPFLAGS-config) $($(subdir)-CPPFLAGS) \
705 $(+includes) $(defines) \
706 -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
707 $(CPPFLAGS-$(suffix $@)) \
708 $(foreach lib,$(libof-$(basename $(@F))) \
709 $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
710 $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
711 override CFLAGS = -std=gnu99 $(gnu89-inline-CFLAGS) $(config-extra-cflags) \
712 $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
713 $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
715 $(foreach lib,$(libof-$(basename $(@F))) \
716 $(libof-$(<F)) $(libof-$(@F)),$(CFLAGS-$(lib)))
717 override CXXFLAGS = $(c++-sysincludes) \
718 $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
719 $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
721 # If everything is compiled with -fPIC (implicitly) we must tell this by
722 # defining the PIC symbol.
723 ifeq (yes,$(build-pic-default))
727 # Enable object files for different versions of the library.
728 # Various things use $(object-suffixes) to know what all to make.
729 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
730 # to pass different flags for each flavor.
731 libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
732 all-object-suffixes := .o .os .op .og .ob .oS
734 CPPFLAGS-.o = $(pic-default)
735 CFLAGS-.o = $(filter %frame-pointer,$(+cflags))
737 object-suffixes += .o
738 ifeq (yes,$(build-shared))
739 # Under --enable-shared, we will build a shared library of PIC objects.
740 # The PIC object files are named foo.os.
741 object-suffixes += .os
742 CPPFLAGS-.os = -DPIC -DSHARED
743 CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
744 libtype.os := lib%_pic.a
745 # This can be changed by a sysdep makefile
747 # This one should always stay like this unless there is a very good reason.
750 # This can be changed by a sysdep makefile
752 # This one should always stay like this unless there is a very good reason.
754 ifeq (yes,$(build-profile))
755 # Under --enable-profile, we will build a static library of profiled objects.
756 # The profiled object files are named foo.op.
757 object-suffixes += .op
758 CPPFLAGS-.op = -DPROF $(pic-default)
760 libtype.op = lib%_p.a
763 # Convenience variable for when we want to treat shared-library cases
764 # differently from the rest.
765 object-suffixes-noshared := $(filter-out .os,$(object-suffixes))
768 ifeq (yes,$(build-bounded))
769 # Under --enable-bounded, we build the library with `-fbounded-pointers -g'
770 # to runtime bounds checking. The bounded-pointer objects are named foo.ob.
771 # We disable sibling-call optimizations so that stack traces will be complete
772 # and thus aid debugging, since after all, BPs are a debugging tool.
773 object-suffixes += .ob
774 CPPFLAGS-.ob = -fbounded-pointers $(pic-default)
775 CFLAGS-.ob = -g -O2 -fno-optimize-sibling-calls -fno-strict-aliasing
776 libtype.ob = lib%_b.a
779 object-suffixes-for-libc := $(object-suffixes)
781 ifeq (yes,$(build-shared))
782 # Build special library that contains the static-only routines for libc.
783 object-suffixes-for-libc += .oS
785 # Must build the routines as PIC, though, because they can end up in (users')
786 # shared objects. We don't want to use CFLAGS-os because users may, for
787 # example, make that processor-specific.
788 CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag)
789 CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
790 libtype.oS = lib%_nonshared.a
793 # The assembler can generate debug information too.
795 ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
797 ASFLAGS += $(ASFLAGS-config) $(asflags-cpu)
803 move-if-change = $(SHELL) $(..)scripts/move-if-change
805 -include $(common-objpfx)sysd-sorted
806 subdirs = $(sorted-subdirs)
807 subdir-srcdirs = $(foreach dir,$(subdirs),\
808 $(firstword $($(dir)-srcdir) $(..)$(dir)))
810 ifeq (yes, $(build-shared))
812 # This is a pair of implicit rules to preprocess a file with # comments,
813 # %ifdef et al, based on config.h settings or other %include'd files.
814 # We use chained rules instead of a pipeline here so that we can properly
815 # check the exit status of cpp rather than using its bad output when there
816 # is a preprocessing error. Another rule should depend on the output file
817 # `FOO.v', and along with that `FOO.v.i' should be given dependencies
818 # listing both its input files, and any header files that it may reference
820 %.v.i: $(common-objpfx)config.h $(..)Makeconfig
821 sed '/^[ ]*%/!s/#.*$$//;/^[ ]*$$/d;s/^[ ]*%/#/' \
822 $(filter-out FORCE %.h $(..)Makeconfig,$^) \
823 | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \
827 sed '/^[ ]*#/d;/^[ ]*$$/d' $< > $@T
830 # To generate a header to support more than one ABI for different
831 # architecture variants, the CPU/Makefile defines abi-variants to be a
832 # list of names for those variants (e.g. 32 64), and, for each variant,
833 # defines abi-$(variant)-condition to be the condition for those options
834 # to use in a C #if condition. abi-includes may be defined to a list of
835 # headers to include in the generated header, if the default does not
836 # suffice. default-abi is defined to be the ABI for the current glibc
840 abi-includes := bits/wordsize.h
843 # Process the shlib-versions file, which tells us what shared library
844 # version numbers to use when we install shared objects on this system.
845 # We need to wait until $(subdirs) is complete.
846 ifeq ($(sysd-sorted-done),t)
847 -include $(common-objpfx)soversions.mk
848 ifndef avoid-generated
849 # This lets add-ons give more-specific matches that override defaults
850 # in the top-level file.
851 $(common-objpfx)shlib-versions.v.i: \
852 $(wildcard $(+sysdep_dirs:=/shlib-versions) \
853 $(subdir-srcdirs:=/shlib-versions)) \
856 soversions-default-setname = $(patsubst %, %,\
857 $(filter-out %_default,\
858 $(oldest-abi:%=GLIBC_%)))
859 $(common-objpfx)soversions.i: $(..)scripts/soversions.awk \
860 $(common-objpfx)shlib-versions.v
861 $(AWK) -v default_setname='$(soversions-default-setname)' \
862 -v cpu='$(config-machine)' \
863 -v vendor='$(config-vendor)' \
864 -v os='$(config-os)' \
867 $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
868 (while read which lib number setname; do \
869 eval seen_$$which=1; \
870 test x"$$which" != xABI || echo abi-name = "$$lib"; \
871 test x"$$which" = xDEFAULT || continue; \
873 [0-9]*) echo "$$lib.so-version=.$$number"; \
874 echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
875 *) echo "$$lib.so-version=\$$(if \$$(abi-$(default-abi)-$$lib-soname),\$$(abi-$(default-abi)-$$lib-soname),$$number)"; \
876 echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
879 echo soversions.mk-done = t;) < $< > $@T; exit 0
884 postclean-generated += soversions.mk soversions.i \
885 shlib-versions.v shlib-versions.v.i
887 # Generate the header containing the names of all shared libraries.
888 # We use a stamp file to avoid unnecessary recompilations.
889 before-compile += $(common-objpfx)gnu/lib-names.h
890 ifeq ($(soversions.mk-done),t)
891 $(common-objpfx)gnu/lib-names.h: $(common-objpfx)gnu/lib-names.stmp; @:
892 $(common-objpfx)gnu/lib-names.stmp: $(..)scripts/lib-names.awk \
893 $(common-objpfx)soversions.i
894 $(make-target-directory)
896 echo '/* This file is automatically generated.';\
897 echo ' It defines macros to allow user program to find the shared'; \
898 echo ' library files which come as part of GNU libc. */'; \
899 echo '#ifndef __GNU_LIB_NAMES_H'; \
900 echo '#define __GNU_LIB_NAMES_H 1'; \
902 $(if $(abi-includes), \
903 $(foreach h,$(abi-includes), echo '#include <$(h)>';) \
905 $(if $(abi-variants), \
906 $(foreach v,$(abi-variants),\
907 $(if $(abi-$(v)-condition),\
908 echo '#if $(abi-$(v)-condition)'; \
909 ($(foreach s,$(all-sonames), \
910 $(if $(abi-$(v)-$(firstword $(subst =, ,$(s)))-soname),\
911 echo $(firstword $(subst =, ,$(s)))=$(abi-$(v)-$(firstword $(subst =, ,$(s)))-soname);, \
913 | LC_ALL=C $(AWK) -v multi=1 -f $(firstword $^) | LC_ALL=C sort;) \
914 $(if $(abi-$(v)-condition),echo '#endif';)), \
915 ($(foreach s,$(all-sonames), echo $(s);)) \
916 | LC_ALL=C $(AWK) -f $(firstword $^) | LC_ALL=C sort;) \
918 echo '#endif /* gnu/lib-names.h */'; \
920 $(move-if-change) ${@:stmp=T} ${@:stmp=h}
924 common-generated += gnu/lib-names.h gnu/lib-names.stmp
926 # The name under which the run-time dynamic linker is installed.
927 # We are currently going for the convention that `/lib/ld.so.1'
928 # names the SVR4/ELF ABI-compliant dynamic linker.
929 ifndef rtld-installed-name
931 rtld-installed-name = $(ld.so-version)
933 rtld-installed-name = ld.so.1
937 ifndef rtld-version-installed-name
938 rtld-version-installed-name = ld-$(version).so
944 ifeq ($(build-shared),yes)
945 libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
947 libdl = $(common-objpfx)dlfcn/libdl.a
950 ifeq ($(build-shared),yes)
951 libm = $(common-objpfx)math/libm.so$(libm.so-version)
953 libm = $(common-objpfx)math/libm.a
956 # These are the subdirectories containing the library source. The order
957 # is more or less arbitrary. The sorting step will take care of the
959 all-subdirs = csu assert ctype locale intl catgets math setjmp signal \
960 stdlib stdio-common libio malloc string wcsmbs time dirent \
961 grp pwd posix io termios resource misc socket sysvipc gmon \
962 gnulib iconv iconvdata wctype manual shadow gshadow po argp \
963 crypt nss localedata timezone rt conform debug \
964 $(add-on-subdirs) dlfcn elf
966 ifndef avoid-generated
967 all-Depend-files := $(wildcard $(foreach dir,$(all-subdirs),\
968 $(firstword $($(dir)-srcdir) \
969 $(..)$(dir))/Depend))
970 $(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \
971 $(common-objpfx)config.make $(..)Makeconfig \
972 $(wildcard $(sysdirs:=/Subdirs)) \
975 -v subdirs='$(all-subdirs)' \
977 $(filter %/Subdirs %/Depend,$^) > $@-tmp
979 $(all-Depend-files): ;
982 # This gives partial TARGET:SOURCE pattern pairs to have rules
983 # emitted into sysd-rules. A sysdeps Makeconfig fragment can
984 # add its own special object file prefix to this list with e.g. foo-%:%
985 # to have foo-*.? compiled from *.? using $(foo-CPPFLAGS).
986 sysd-rules-patterns := %:% rtld-%:rtld-% rtld-%:% m_%:s_%
988 # Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
989 sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig))
990 ifneq (,$(sysdep-makeconfigs))
991 include $(sysdep-makeconfigs)
994 # Compute just the target patterns. Makeconfig has set sysd-rules-patterns.
995 sysd-rules-targets := $(sort $(foreach p,$(sysd-rules-patterns),\
996 $(firstword $(subst :, ,$p))))
998 # A sysdeps Makeconfig fragment may set libc-reentrant to yes.
999 ifeq (yes,$(libc-reentrant))
1000 defines += -D_LIBC_REENTRANT
1002 libio-mtsafe = -D_IO_MTSAFE_IO
1005 endif # Makeconfig not yet included