1 # Copyright (C) 1991-2003,2004,2005,2006 Free Software Foundation, Inc.
2 # This file is part of the GNU C Library.
4 # The GNU C Library is free software; you can redistribute it and/or
5 # modify it under the terms of the GNU Lesser General Public
6 # License as published by the Free Software Foundation; either
7 # version 2.1 of the License, or (at your option) any later version.
9 # The GNU C Library is distributed in the hope that it will be useful,
10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 # Lesser General Public License for more details.
14 # You should have received a copy of the GNU Lesser General Public
15 # License along with the GNU C Library; if not, write to the Free
16 # Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 # Makefile configuration options for the GNU C library.
23 This makefile requires GNU Make.
26 all: # Make this the default goal
28 ifneq "$(origin +included-Makeconfig)" "file"
30 +included-Makeconfig := yes
36 # If config.make exists, the source directory was configured,
37 # so don't try to be clever and find another directory to build in.
38 ifneq (,$(wildcard $(..)config.make))
41 else # Not configured.
49 # Directory for object files and libc.a. If this is not defined, the
50 # object files live in the subdirectories where their sources live, and
51 # libc.a lives in the parent directory (this probably doesn't work any
54 ifeq ($(filter /%,$(ARCH)),)
55 objdir := $(..)$(ARCH)
61 # $(common-objdir) is the place to put objects and
62 # such that are not specific to a single subdir.
64 objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/)
65 common-objpfx = $(objdir)/
66 common-objdir = $(objdir)
73 # This is a kludge. make wizards might grok.
74 common-objpfx = sysdeps/../
79 # Root of the sysdeps tree.
80 sysdep_dir := $(..)sysdeps
81 export sysdep_dir := $(sysdep_dir)
83 # Get the values defined by options to `configure'.
84 include $(common-objpfx)config.make
86 # What flags to give to sources which call user provided callbacks
87 uses-callbacks = $(exceptions)
89 # What flags to give to tests which test stack alignment
90 stack-align-test-flags =
92 # We have a special subdir for each binary format.
93 # For now, only ELF is fully supported.
97 # This is probably better than nothing.
101 # Complete path to sysdep dirs.
102 # `configure' writes a definition of `config-sysdirs' in `config.make'.
103 sysdirs := $(foreach D,$(config-sysdirs),$(firstword $(filter /%,$D) $(..)$D))
105 # Add-ons that contribute sysdeps trees get added to the include list
106 # after sysdeps/generic. This makes #include <sysdeps/...> work right
107 # to find specific add-on files without assuming the add-on directory name.
108 # It also means that headers can go into an add-on's base directory
109 # instead of the add-on needing a sysdeps/generic of its own.
110 sysdeps-srcdirs := $(foreach add-on,$(sysdeps-add-ons),\
111 $(firstword $(filter /%,$(add-on)) \
113 +sysdep_dirs = $(sysdirs) $(sysdeps-srcdirs)
115 +sysdep_dirs := $(objdir) $(+sysdep_dirs)
118 # Run config.status to update config.make and config.h. We don't show the
119 # dependence of config.h to Make, because it is only touched when it
120 # changes and so config.status would be run every time; the dependence of
121 # config.make should suffice to force regeneration and re-exec, and the new
122 # image will notice if config.h changed.
123 $(common-objpfx)config.make: $(common-objpfx)config.status \
124 $(..)config.make.in $(..)config.h.in
125 cd $(<D); $(SHELL) $(<F)
127 # Find all the add-on and sysdeps configure fragments, to make sure we
128 # re-run configure when any of them changes.
129 $(common-objpfx)config.status: $(..)version.h $(..)configure \
130 $(foreach dir,$(sysdirs),\
131 $(wildcard $(dir)/Implies) \
133 $(firstword $(wildcard \
134 $(addprefix $(dir)/,configure configure.in))))) \
136 $(foreach add-on,$(add-ons),\
137 $(firstword $(wildcard \
138 $(addprefix $(firstword $(filter /%,$(add-on)) $(..)$(add-on))/,\
139 configure configure.in)))))
140 @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
141 echo The GNU C library has not been configured. >&2; \
142 echo Run \`configure\' to configure it before building. >&2; \
143 echo Try \`configure --help\' for more details. >&2; \
146 # We don't want CPPFLAGS to be exported to the command running configure.
149 # Get the user's configuration parameters.
150 ifneq ($(wildcard $(..)configparms),)
151 include $(..)configparms
154 ifneq ($(wildcard $(common-objpfx)configparms),)
155 include $(common-objpfx)configparms
160 #### These are the configuration variables. You can define values for
161 #### the variables below in the file `configparms'.
162 #### Do NOT edit this file.
166 # Common prefix for machine-independent installation directories.
167 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
171 # Decide whether we shall build the programs or not. We always do this
172 # unless the user tells us (in configparms) or we are building for a
174 ifndef build-programs
175 ifneq ($(config-os),none)
182 # Common prefix for machine-dependent installation directories.
183 ifeq ($(origin exec_prefix),undefined)
184 exec_prefix = $(prefix)
187 # Where to install the library and object files.
189 libdir = $(exec_prefix)/lib
191 inst_libdir = $(install_root)$(libdir)
193 # Where to install the shared library and dynamic linker.
195 slibdir = $(exec_prefix)/lib
197 inst_slibdir = $(install_root)$(slibdir)
199 # Prefix to put on files installed in $(libdir). For libraries `libNAME.a',
200 # the prefix is spliced between `lib' and the name, so the linker switch
201 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
202 # just prepended to the whole file name.
203 ifeq ($(origin libprefix),undefined)
207 # Where to install the header files.
209 includedir = $(prefix)/include
211 inst_includedir = $(install_root)$(includedir)
213 # Where to install machine-independent data files.
214 # These are the timezone database, and the locale database.
216 datadir = $(prefix)/share
218 inst_datadir = $(install_root)$(datadir)
220 # Where to install the timezone data files (which are machine-independent).
222 zonedir = $(datadir)/zoneinfo
224 inst_zonedir = $(install_root)$(zonedir)
226 # Where to install the locale files.
228 localedir = $(libdir)/locale
230 inst_localedir = $(install_root)$(localedir)
232 # Where to install the message catalog data files (which are
233 # machine-independent).
235 msgcatdir = $(datadir)/locale
237 inst_msgcatdir = $(install_root)$(msgcatdir)
239 # Where to install the locale charmap source files.
241 i18ndir = $(datadir)/i18n
243 inst_i18ndir = $(install_root)$(i18ndir)
245 # Where to install the shared object for charset transformation.
247 gconvdir = $(libdir)/gconv
249 inst_gconvdir = $(install_root)$(gconvdir)
251 # Where to install programs.
253 bindir = $(exec_prefix)/bin
255 inst_bindir = $(install_root)$(bindir)
257 # Where to install internal programs.
259 libexecdir = $(exec_prefix)/libexec
261 inst_libexecdir = $(install_root)$(libexecdir)
263 # Where to install administrative programs.
265 rootsbindir = $(exec_prefix)/sbin
267 inst_rootsbindir = $(install_root)$(rootsbindir)
270 sbindir = $(exec_prefix)/sbin
272 inst_sbindir = $(install_root)$(sbindir)
274 # Where to install the Info files.
276 infodir = $(prefix)/info
278 inst_infodir = $(install_root)$(infodir)
280 # Where to install default configuration files. These include the local
281 # timezone specification and network data base files.
283 sysconfdir = $(prefix)/etc
285 inst_sysconfdir = $(install_root)$(sysconfdir)
287 # What timezone should be the installed default (e.g., US/Eastern).
288 # Run `make -C time echo-zonenames' to see a list of available zone names.
289 # The local timezone can be changed with `zic -l TIMEZONE' at any time.
294 # Where to install the "localtime" timezone file; this is the file whose
295 # contents $(localtime) specifies. If this is a relative pathname, it is
296 # relative to $(zonedir). It is a good idea to put this somewhere
297 # other than there, so the zoneinfo directory contains only universal data,
298 # localizing the configuration data elsewhere.
299 ifndef localtime-file
300 localtime-file = $(sysconfdir)/localtime
301 inst_localtime-file = $(install_root)$(localtime-file)
304 # What to use for leap second specifications in compiling the default
305 # timezone files. Set this to `/dev/null' for no leap second handling as
306 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
307 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
308 # This variable determines the default: if it's `/dev/null',
309 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
311 leapseconds = /dev/null
314 # What timezone's DST rules should be used when a POSIX-style TZ
315 # environment variable doesn't specify any rules. For 1003.1 compliance
316 # this timezone must use rules that are as U.S. federal law defines DST.
317 # Run `make -C time echo-zonenames' to see a list of available zone names.
318 # This setting can be changed with `zic -p TIMEZONE' at any time.
319 # If you want POSIX.1 compatibility, use `America/New_York'.
321 posixrules = America/New_York
324 # Where to install the "posixrules" timezone file; this is file
325 # whose contents $(posixrules) specifies. If this is a relative
326 # pathname, it is relative to $(zonedir).
327 ifndef posixrules-file
328 posixrules-file = posixrules
332 # Directory where your system's native header files live.
333 # This is used on Unix systems to generate some GNU libc header files.
335 sysincludedir = /usr/include
339 # Commands to install files.
341 INSTALL_DATA = $(INSTALL) -m 644
343 ifndef INSTALL_SCRIPT
344 INSTALL_SCRIPT = $(INSTALL)
346 ifndef INSTALL_PROGRAM
347 INSTALL_PROGRAM = $(INSTALL)
354 # The name of the C compiler.
355 # If you've got GCC, and it works, use it.
356 ifeq ($(origin CC),default)
360 # The name of the C compiler to use for compilations of programs to run on
361 # the host that is building the library. If you set CC to a
362 # cross-compiler, you must set this to the normal compiler.
367 # Default flags to pass the C compiler.
368 ifndef default_cflags
369 ifeq ($(release),stable)
370 default_cflags := -g -O2
372 default_cflags := -g -O
376 # Flags to pass the C compiler when assembling preprocessed assembly code
377 # (`.S' files). On some systems the assembler doesn't understand the `#' line
378 # directives the preprocessor produces. If you have troubling compiling
379 # assembly code, try using -P here to suppress these directives.
384 # ELF always supports init/fini sections
389 # Installed name of the startup code.
390 ifneq ($(have-initfini),yes)
391 # When not having init/fini, there is just one startfile, called crt0.o.
392 start-installed-name = crt0.o
394 # On systems having init/fini, crt0.o is called crt1.o, and there are
395 # some additional bizarre files.
396 start-installed-name = crt1.o
398 # On systems that do not need a special startfile for statically linked
399 # binaries, simply set it to the normal name.
400 ifndef static-start-installed-name
401 static-start-installed-name = $(start-installed-name)
404 ifeq (yesyesyes,$(build-shared)$(elf)$(have-z-combreloc))
405 combreloc-LDFLAGS = -Wl,-z,combreloc
406 LDFLAGS.so += $(combreloc-LDFLAGS)
407 LDFLAGS-rtld += $(combreloc-LDFLAGS)
410 relro-LDFLAGS = -Wl,-z,relro
411 LDFLAGS.so += $(relro-LDFLAGS)
412 LDFLAGS-rtld += $(relro-LDFLAGS)
414 ifeq (yes,$(have-hash-style))
415 # For the time being we unconditionally use 'both'. At some time we
416 # should declare statically linked code as 'out of luck' and compile
417 # with --hash-style=gnu only.
418 hashstyle-LDFLAGS = -Wl,--hash-style=both
419 LDFLAGS.so += $(hashstyle-LDFLAGS)
420 LDFLAGS-rtld += $(hashstyle-LDFLAGS)
423 # Command for linking programs with the C library.
425 +link = $(CC) -nostdlib -nostartfiles -o $@ \
426 $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
427 $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
428 $(addprefix $(csu-objpfx),$(start-installed-name)) \
429 $(+preinit) $(+prector) \
430 $(filter-out $(addprefix $(csu-objpfx),start.o \
431 $(start-installed-name))\
432 $(+preinit) $(link-extra-libs) \
433 $(common-objpfx)libc% $(+postinit),$^) \
434 $(link-extra-libs) $(link-libc) $(+postctor) $(+postinit)
436 # Command for statically linking programs with the C library.
438 +link-static = $(CC) -nostdlib -nostartfiles -static -o $@ \
439 $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
440 $(addprefix $(csu-objpfx),$(static-start-installed-name)) \
441 $(+preinit) $(+prector) \
442 $(filter-out $(addprefix $(csu-objpfx),start.o \
443 $(start-installed-name))\
444 $(+preinit) $(link-extra-libs-static) \
445 $(common-objpfx)libc% $(+postinit),$^) \
446 $(link-extra-libs-static) $(link-libc-static) $(+postctor) $(+postinit)
448 # Command for statically linking bounded-pointer programs with the C library.
450 +link-bounded = $(CC) -nostdlib -nostartfiles -static -fbounded-pointers -o $@ \
451 $(sysdep-LDFLAGS) $(LDFLAGS) \
452 $(addprefix $(csu-objpfx),b$(static-start-installed-name)) \
453 $(+preinit) $(+prector) \
454 $(filter-out $(addprefix $(csu-objpfx),start.ob \
455 $(start-installed-name))\
456 $(+preinit) $(link-extra-libs-bounded) \
457 $(common-objpfx)libc% $(+postinit),$^) \
458 $(link-extra-libs-bounded) $(link-libc-bounded) $(+postctor) $(+postinit)
460 ifndef config-LDFLAGS
461 ifeq (yesyes,$(build-shared)$(elf))
462 config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
466 ifeq (yes,$(build-shared))
468 # We need the versioned name of libc.so in the deps of $(others) et al
469 # so that the symlink to libc.so is created before anything tries to
470 # run the linked programs.
471 link-libc = -Wl,-rpath-link=$(rpath-link) \
472 $(common-objpfx)libc.so$(libc.so-version) \
473 $(common-objpfx)$(patsubst %,$(libtype.oS),c) $(gnulib)
474 # This is how to find at build-time things that will be installed there.
475 rpath-dirs = math elf dlfcn nss nis rt resolv crypt
478 $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
479 elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf)
481 nssobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)nss)
482 resolvobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)resolv)
483 link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
487 # Differences in the linkers on the various platforms.
489 LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
490 LDFLAGS-soname-fname = -Wl,-soname,$(@F)
491 LDFLAGS-rdynamic = -rdynamic
492 LDFLAGS-Bsymbolic = -Bsymbolic
495 # Choose the default search path for the dynamic linker based on
496 # where we will install libraries.
497 ifneq ($(libdir),$(slibdir))
498 default-rpath = $(slibdir):$(libdir)
500 default-rpath = $(libdir)
503 ifndef link-extra-libs
504 link-extra-libs = $(LDLIBS-$(@F))
505 link-extra-libs-static = $(link-extra-libs)
506 link-extra-libs-bounded = $(link-extra-libs)
509 # The static libraries.
510 ifeq (yes,$(build-static))
511 link-libc-static = $(common-objpfx)libc.a $(static-gnulib) $(common-objpfx)libc.a
513 ifeq (yes,$(build-shared))
514 # We can try to link the programs with lib*_pic.a...
515 link-libc-static = $(static-gnulib) $(common-objpfx)libc_pic.a
518 link-libc-bounded = $(common-objpfx)libc_b.a $(gnulib) $(common-objpfx)libc_b.a
521 ifneq ($(have-cc-with-libunwind),yes)
526 ifneq ($(have-as-needed),yes)
527 libgcc_eh := -lgcc_eh $(libunwind)
529 libgcc_eh := -Wl,--as-needed -lgcc_s$(libgcc_s_suffix) $(libunwind) -Wl,--no-as-needed
531 gnulib := -lgcc $(libgcc_eh)
532 static-gnulib := -lgcc -lgcc_eh $(libunwind)
533 libc.so-gnulib := -lgcc
536 +preinit = $(addprefix $(csu-objpfx),crti.o)
537 +postinit = $(addprefix $(csu-objpfx),crtn.o)
538 +prector = `$(CC) --print-file-name=crtbegin.o`
539 +postctor = `$(CC) --print-file-name=crtend.o`
540 +interp = $(addprefix $(elf-objpfx),interp.os)
542 csu-objpfx = $(common-objpfx)csu/
543 elf-objpfx = $(common-objpfx)elf/
545 # How to run a program we just linked with our library.
546 # The program binary is assumed to be $(word 2,$^).
547 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
548 ifeq (yesyes,$(build-shared)$(elf))
550 sysdep-library-path = \
551 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
552 $(filter -Wl$(comma)-rpath-link=%,\
553 $(sysdep-LDFLAGS)))))
554 run-program-prefix = $(if $(filter $(notdir $(built-program-file)),\
555 $(tests-static) $(xtests-static)),, \
556 $(elf-objpfx)$(rtld-installed-name) \
557 --library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)))
561 # Never use $(run-program-prefix) for the statically-linked %-bp test programs
562 built-program-cmd = $(patsubst %,$(run-program-prefix),\
563 $(filter-out %-bp,$(built-program-file))) \
564 $(built-program-file)
574 # Extra flags to pass to GCC.
575 ifeq ($(all-warnings),yes)
576 +gccwarn := -Wall -Wwrite-strings -Winline -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
578 +gccwarn := -Wall -Wwrite-strings -Winline
580 +gccwarn-c = -Wstrict-prototypes
582 # We do not depend on the address of constants in different files to be
583 # actually different, so allow the compiler to merge them all.
584 +merge-constants = -fmerge-all-constants
586 # This is the program that generates makefile dependencies from C source files.
587 # The -MP flag tells GCC >= 3.2 (which we now require) to produce dummy
588 # targets for headers so that removed headers don't break the build.
590 +mkdep = $(CC) -M -MP
593 # The program that makes Emacs-style TAGS files.
596 # The `xgettext' program for producing .pot files from sources.
601 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
602 # perhaps others) to preprocess assembly code in some cases.
605 # To force installation of files even if they are older than the
606 # installed files. This variable is included in the dependency list
607 # of all installation targets.
608 ifeq ($(force-install),yes)
609 +force = force-install
615 #### End of configuration variables.
618 # This tells some versions of GNU make before 3.63 not to export all variables.
621 # We want to echo the commands we're running without
622 # umpteen zillion filenames along with it (we use `...' instead)
623 # but we don't want this echoing done when the user has said
624 # he doesn't want to see commands echoed by using -s.
625 ifneq "$(findstring s,$(MAKEFLAGS))" "" # if -s
626 +cmdecho := echo >/dev/null
631 # These are the flags given to the compiler to tell
632 # it what sort of optimization and/or debugging output to do.
634 # If `CFLAGS' was defined, use that.
636 +cflags := $(filter-out -I%,$(CFLAGS))
640 # If none of the above worked, default to "-g -O".
641 ifeq "$(strip $(+cflags))" ""
642 +cflags := $(default_cflags)
643 endif # $(+cflags) == ""
645 +cflags += $(addprefix -mcpu=,$(with-cpu)) $(+gccwarn) $(+merge-constants)
648 # Don't duplicate options if we inherited variables from the parent.
649 +cflags := $(sort $(+cflags))
652 # These are flags given to the C compiler to tell it to look for
653 # include files (including ones given in angle brackets) in the parent
654 # library source directory, in the include directory, and in the
656 +sysdep-includes = $(addprefix -I,$(+sysdep_dirs))
657 +includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \
658 $(+sysdep-includes) $(includes) \
659 $(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes)
661 # Since libio has several internal header files, we use a -I instead
662 # of many little headers in the include directory.
663 libio-include = -I$(..)libio
665 # These are the variables that the implicit compilation rules use.
666 # Note that we can't use -std=* in CPPFLAGS, because it overrides
667 # the implicit -lang-asm and breaks cpp behavior for .S files--notably
668 # it causes cpp to stop predefining __ASSEMBLER__.
669 CPPFLAGS = $($(subdir)-CPPFLAGS) $(+includes) $(defines) \
670 -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
671 $(CPPFLAGS-$(suffix $@)) \
672 $(foreach lib,$(libof-$(basename $(@F))) \
673 $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
674 $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
675 override CFLAGS = -std=gnu99 \
676 $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
677 $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
679 override CXXFLAGS = $(c++-sysincludes) \
680 $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
681 $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
683 # If everything is compiled with -fPIC (implicitly) we must tell this by
684 # defining the PIC symbol.
685 ifeq (yes,$(build-pic-default))
689 # Enable object files for different versions of the library.
690 # Various things use $(object-suffixes) to know what all to make.
691 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
692 # to pass different flags for each flavor.
693 libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
694 all-object-suffixes := .o .os .op .og .ob .oS
696 CPPFLAGS-.o = $(pic-default)
697 CFLAGS-.o = $(filter %frame-pointer,$(+cflags))
698 ifeq (yes,$(build-static))
700 object-suffixes += .o
702 ifeq (yes,$(build-shared))
703 # Under --enable-shared, we will build a shared library of PIC objects.
704 # The PIC object files are named foo.os.
705 object-suffixes += .os
706 CPPFLAGS-.os = -DPIC -DSHARED
707 CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
708 libtype.os := lib%_pic.a
709 # This can be changed by a sysdep makefile
711 # This one should always stay like this unless there is a very good reason.
714 ifeq (yes,$(build-profile))
715 # Under --enable-profile, we will build a static library of profiled objects.
716 # The profiled object files are named foo.op.
717 object-suffixes += .op
718 CPPFLAGS-.op = -DPROF $(pic-default)
720 libtype.op = lib%_p.a
722 ifeq (yes,$(build-omitfp))
723 # Under --enable-omitfp, we build the library optimized without
724 # debugging information using -fomit-frame-pointer, and build an extra
725 # library with debugging information. The debuggable objects are named foo.og.
726 object-suffixes += .og
727 CPPFLAGS-.og = $(pic-default)
729 CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES
730 CFLAGS-.os += -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES
731 libtype.og = lib%_g.a
735 ifeq (yes,$(build-bounded))
736 # Under --enable-bounded, we build the library with `-fbounded-pointers -g'
737 # to runtime bounds checking. The bounded-pointer objects are named foo.ob.
738 # We disable sibling-call optimizations so that stack traces will be complete
739 # and thus aid debugging, since after all, BPs are a debugging tool.
740 object-suffixes += .ob
741 CPPFLAGS-.ob = -fbounded-pointers $(pic-default)
742 CFLAGS-.ob = -g -O2 -fno-optimize-sibling-calls -fno-strict-aliasing
743 libtype.ob = lib%_b.a
746 object-suffixes-for-libc := $(object-suffixes)
748 ifeq (yes,$(build-shared))
749 # Build special library that contains the static-only routines for libc.
750 object-suffixes-for-libc += .oS
752 # Must build the routines as PIC, though, because they can end up in (users')
753 # shared objects. We don't want to use CFLAGS-os because users may, for
754 # example, make that processor-specific.
755 CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag)
756 CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
757 libtype.oS = lib%_nonshared.a
760 # The assembler can generate debug information too.
762 ifeq ($(have-cpp-asm-debuginfo),yes)
763 ASFLAGS := $(filter -g%,$(CFLAGS))
768 ASFLAGS += $(ASFLAGS-config)
774 move-if-change = $(SHELL) $(..)scripts/move-if-change
776 -include $(common-objpfx)sysd-sorted
777 subdirs = $(sorted-subdirs)
778 subdir-srcdirs = $(foreach dir,$(subdirs),\
779 $(firstword $($(dir)-srcdir) $(..)$(dir)))
781 ifeq (yes, $(build-shared))
783 # This is a pair of implicit rules to preprocess a file with # comments,
784 # %ifdef et al, based on config.h settings or other %include'd files.
785 # We use chained rules instead of a pipeline here so that we can properly
786 # check the exit status of cpp rather than using its bad output when there
787 # is a preprocessing error. Another rule should depend on the output file
788 # `FOO.v', and along with that `FOO.v.i' should be given dependencies
789 # listing both its input files, and any header files that it may reference
791 %.v.i: $(common-objpfx)config.h
792 sed '/^[ ]*#/d;s/^[ ]*%/#/' $(filter-out FORCE %.h,$^) \
793 | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \
797 sed '/^[ ]*#/d;/^[ ]*$$/d' $< > $@T
800 # Process the shlib-versions file, which tells us what shared library
801 # version numbers to use when we install shared objects on this system.
802 # We need to wait until $(subdirs) is complete.
803 ifeq ($(sysd-sorted-done),t)
804 -include $(common-objpfx)soversions.mk
805 ifndef avoid-generated
806 # This lets add-ons give more-specific matches that override defaults
807 # in the top-level file.
808 $(common-objpfx)shlib-versions.v.i: \
809 $(wildcard $(+sysdep_dirs:=/shlib-versions) \
810 $(subdir-srcdirs:=/shlib-versions)) \
813 soversions-default-setname = $(patsubst %, %,\
814 $(filter-out %_default,\
815 $(oldest-abi:%=GLIBC_%)))
816 $(common-objpfx)soversions.i: $(..)scripts/soversions.awk \
817 $(common-objpfx)shlib-versions.v
818 $(AWK) -v default_setname='$(soversions-default-setname)' \
819 -v cpu='$(config-machine)' \
820 -v vendor='$(config-vendor)' \
821 -v os='$(config-os)' \
824 $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
825 (seen_DEFAULT=0; seen_WORDSIZE32=0; seen_WORDSIZE64=0; \
826 while read which lib number setname; do \
827 eval seen_$$which=1; \
828 test x"$$which" = xDEFAULT || continue; \
830 [0-9]*) echo "$$lib.so-version=.$$number"; \
831 echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
832 *) echo "$$lib.so-version=$$number"; \
833 echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
836 case "$$seen_DEFAULT$$seen_WORDSIZE32$$seen_WORDSIZE64" in \
837 100) echo biarch = no;; \
838 101) echo biarch = 32;; \
839 ?1?) echo biarch = 64;; \
840 *) echo >&2 BUG; exit 2;; \
842 echo soversions.mk-done = t;) < $< > $@T; exit 0
847 postclean-generated += soversions.mk soversions.i \
848 shlib-versions.v shlib-versions.v.i
850 # Generate the header containing the names of all shared libraries.
851 # We use a stamp file to avoid unnecessary recompilations.
852 before-compile += $(common-objpfx)gnu/lib-names.h
853 ifeq ($(soversions.mk-done),t)
854 $(common-objpfx)gnu/lib-names.h: $(common-objpfx)gnu/lib-names.stmp; @:
855 $(common-objpfx)gnu/lib-names.stmp: $(..)scripts/lib-names.awk \
856 $(common-objpfx)soversions.i
857 $(make-target-directory)
858 @rm -f ${@:stmp=T} $@
859 $(AWK) -f $^ > ${@:stmp=T}
860 $(move-if-change) ${@:stmp=T} ${@:stmp=h}
864 common-generated += gnu/lib-names.h gnu/lib-names.stmp
866 # The name under which the run-time dynamic linker is installed.
867 # We are currently going for the convention that `/lib/ld.so.1'
868 # names the SVR4/ELF ABI-compliant dynamic linker.
869 ifndef rtld-installed-name
871 rtld-installed-name = $(ld.so-version)
873 rtld-installed-name = ld.so.1
877 ifndef rtld-version-installed-name
878 rtld-version-installed-name = ld-$(version).so
886 ifeq ($(build-shared),yes)
887 libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
889 libdl = $(common-objpfx)dlfcn/libdl.a
892 ifneq (,$(findstring aix,$(config-os)))
893 ifeq ($(build-shared),yes)
895 libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
897 # No libdl without shared libs on AIX
902 # No ELF, no AIX - no libdl, at least for now.
908 # These are the subdirectories containing the library source. The order
909 # is more or less arbitrary. The sorting step will take care of the
911 all-subdirs = csu assert ctype locale intl catgets math setjmp signal \
912 stdlib stdio-common libio malloc string wcsmbs time dirent \
913 grp pwd posix io termios resource misc socket sysvipc gmon \
914 gnulib iconv iconvdata wctype manual shadow po argp \
915 crypt nss localedata timezone rt conform debug \
916 $(add-on-subdirs) $(dlfcn) $(binfmt-subdir)
918 ifndef avoid-generated
919 all-Depend-files := $(wildcard $(foreach dir,$(all-subdirs),\
920 $(firstword $($(dir)-srcdir) \
921 $(..)$(dir))/Depend))
922 $(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \
923 $(common-objpfx)config.make $(..)Makeconfig \
924 $(wildcard $(sysdirs:=/Subdirs)) \
927 -v subdirs='$(all-subdirs)' \
929 $(filter %/Subdirs %/Depend,$^) > $@-tmp
931 $(all-Depend-files): ;
934 # Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
935 sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig))
936 ifneq (,$(sysdep-makeconfigs))
937 include $(sysdep-makeconfigs)
941 endif # Makeconfig not yet included