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 += $(combreloc-LDFLAGS)
410 ifeq (yes,$(have-z-relro))
411 relro-LDFLAGS = -Wl,-z,relro
412 LDFLAGS.so += $(relro-LDFLAGS)
413 LDFLAGS-rtld += $(relro-LDFLAGS)
416 ifeq (yes,$(have-hash-style))
417 # For the time being we unconditionally use 'both'. At some time we
418 # should declare statically linked code as 'out of luck' and compile
419 # with --hash-style=gnu only.
420 hashstyle-LDFLAGS = -Wl,--hash-style=both
421 LDFLAGS.so += $(hashstyle-LDFLAGS)
422 LDFLAGS-rtld += $(hashstyle-LDFLAGS)
425 # Command for linking programs with the C library.
427 +link = $(CC) -nostdlib -nostartfiles -o $@ \
428 $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
429 $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
430 $(addprefix $(csu-objpfx),$(start-installed-name)) \
431 $(+preinit) $(+prector) \
432 $(filter-out $(addprefix $(csu-objpfx),start.o \
433 $(start-installed-name))\
434 $(+preinit) $(link-extra-libs) \
435 $(common-objpfx)libc% $(+postinit),$^) \
436 $(link-extra-libs) $(link-libc) $(+postctor) $(+postinit)
438 # Command for statically linking programs with the C library.
440 +link-static = $(CC) -nostdlib -nostartfiles -static -o $@ \
441 $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
442 $(addprefix $(csu-objpfx),$(static-start-installed-name)) \
443 $(+preinit) $(+prector) \
444 $(filter-out $(addprefix $(csu-objpfx),start.o \
445 $(start-installed-name))\
446 $(+preinit) $(link-extra-libs-static) \
447 $(common-objpfx)libc% $(+postinit),$^) \
448 $(link-extra-libs-static) $(link-libc-static) $(+postctor) $(+postinit)
450 # Command for statically linking bounded-pointer programs with the C library.
452 +link-bounded = $(CC) -nostdlib -nostartfiles -static -fbounded-pointers -o $@ \
453 $(sysdep-LDFLAGS) $(LDFLAGS) \
454 $(addprefix $(csu-objpfx),b$(static-start-installed-name)) \
455 $(+preinit) $(+prector) \
456 $(filter-out $(addprefix $(csu-objpfx),start.ob \
457 $(start-installed-name))\
458 $(+preinit) $(link-extra-libs-bounded) \
459 $(common-objpfx)libc% $(+postinit),$^) \
460 $(link-extra-libs-bounded) $(link-libc-bounded) $(+postctor) $(+postinit)
462 ifndef config-LDFLAGS
463 ifeq (yesyes,$(build-shared)$(elf))
464 config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
468 ifeq (yes,$(build-shared))
470 # We need the versioned name of libc.so in the deps of $(others) et al
471 # so that the symlink to libc.so is created before anything tries to
472 # run the linked programs.
473 link-libc = -Wl,-rpath-link=$(rpath-link) \
474 $(common-objpfx)libc.so$(libc.so-version) \
475 $(common-objpfx)$(patsubst %,$(libtype.oS),c) $(gnulib)
476 # This is how to find at build-time things that will be installed there.
477 rpath-dirs = math elf dlfcn nss nis rt resolv crypt
480 $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
481 elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf)
483 nssobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)nss)
484 resolvobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)resolv)
485 link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
489 # Differences in the linkers on the various platforms.
491 LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
492 LDFLAGS-soname-fname = -Wl,-soname,$(@F)
493 LDFLAGS-rdynamic = -rdynamic
494 LDFLAGS-Bsymbolic = -Bsymbolic
497 # Choose the default search path for the dynamic linker based on
498 # where we will install libraries.
499 ifneq ($(libdir),$(slibdir))
500 default-rpath = $(slibdir):$(libdir)
502 default-rpath = $(libdir)
505 ifndef link-extra-libs
506 link-extra-libs = $(LDLIBS-$(@F))
507 link-extra-libs-static = $(link-extra-libs)
508 link-extra-libs-bounded = $(link-extra-libs)
511 # The static libraries.
512 ifeq (yes,$(build-static))
513 link-libc-static = $(common-objpfx)libc.a $(static-gnulib) $(common-objpfx)libc.a
515 ifeq (yes,$(build-shared))
516 # We can try to link the programs with lib*_pic.a...
517 link-libc-static = $(static-gnulib) $(common-objpfx)libc_pic.a
520 link-libc-bounded = $(common-objpfx)libc_b.a $(gnulib) $(common-objpfx)libc_b.a
523 ifneq ($(have-cc-with-libunwind),yes)
528 ifneq ($(have-as-needed),yes)
529 libgcc_eh := -lgcc_eh $(libunwind)
531 libgcc_eh := -Wl,--as-needed -lgcc_s$(libgcc_s_suffix) $(libunwind) -Wl,--no-as-needed
533 gnulib := -lgcc $(libgcc_eh)
534 static-gnulib := -lgcc -lgcc_eh $(libunwind)
535 libc.so-gnulib := -lgcc
538 +preinit = $(addprefix $(csu-objpfx),crti.o)
539 +postinit = $(addprefix $(csu-objpfx),crtn.o)
540 +prector = `$(CC) --print-file-name=crtbegin.o`
541 +postctor = `$(CC) --print-file-name=crtend.o`
542 +interp = $(addprefix $(elf-objpfx),interp.os)
544 csu-objpfx = $(common-objpfx)csu/
545 elf-objpfx = $(common-objpfx)elf/
547 # How to run a program we just linked with our library.
548 # The program binary is assumed to be $(word 2,$^).
549 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
550 ifeq (yesyes,$(build-shared)$(elf))
552 sysdep-library-path = \
553 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
554 $(filter -Wl$(comma)-rpath-link=%,\
555 $(sysdep-LDFLAGS)))))
556 run-program-prefix = $(if $(filter $(notdir $(built-program-file)),\
557 $(tests-static) $(xtests-static)),, \
558 $(elf-objpfx)$(rtld-installed-name) \
559 --library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)))
563 # Never use $(run-program-prefix) for the statically-linked %-bp test programs
564 built-program-cmd = $(patsubst %,$(run-program-prefix),\
565 $(filter-out %-bp,$(built-program-file))) \
566 $(built-program-file)
576 # Extra flags to pass to GCC.
577 ifeq ($(all-warnings),yes)
578 +gccwarn := -Wall -Wwrite-strings -Winline -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
580 +gccwarn := -Wall -Wwrite-strings -Winline
582 +gccwarn-c = -Wstrict-prototypes
584 # We do not depend on the address of constants in different files to be
585 # actually different, so allow the compiler to merge them all.
586 +merge-constants = -fmerge-all-constants
588 # This is the program that generates makefile dependencies from C source files.
589 # The -MP flag tells GCC >= 3.2 (which we now require) to produce dummy
590 # targets for headers so that removed headers don't break the build.
592 +mkdep = $(CC) -M -MP
595 # The program that makes Emacs-style TAGS files.
598 # The `xgettext' program for producing .pot files from sources.
603 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
604 # perhaps others) to preprocess assembly code in some cases.
607 # To force installation of files even if they are older than the
608 # installed files. This variable is included in the dependency list
609 # of all installation targets.
610 ifeq ($(force-install),yes)
611 +force = force-install
617 #### End of configuration variables.
620 # This tells some versions of GNU make before 3.63 not to export all variables.
623 # We want to echo the commands we're running without
624 # umpteen zillion filenames along with it (we use `...' instead)
625 # but we don't want this echoing done when the user has said
626 # he doesn't want to see commands echoed by using -s.
627 ifneq "$(findstring s,$(MAKEFLAGS))" "" # if -s
628 +cmdecho := echo >/dev/null
633 # These are the flags given to the compiler to tell
634 # it what sort of optimization and/or debugging output to do.
636 # If `CFLAGS' was defined, use that.
638 +cflags := $(filter-out -I%,$(CFLAGS))
642 # If none of the above worked, default to "-g -O".
643 ifeq "$(strip $(+cflags))" ""
644 +cflags := $(default_cflags)
645 endif # $(+cflags) == ""
647 +cflags += $(addprefix -mcpu=,$(with-cpu)) $(+gccwarn) $(+merge-constants)
650 # Don't duplicate options if we inherited variables from the parent.
651 +cflags := $(sort $(+cflags))
654 # These are flags given to the C compiler to tell it to look for
655 # include files (including ones given in angle brackets) in the parent
656 # library source directory, in the include directory, and in the
658 +sysdep-includes = $(addprefix -I,$(+sysdep_dirs))
659 +includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \
660 $(+sysdep-includes) $(includes) \
661 $(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes)
663 # Since libio has several internal header files, we use a -I instead
664 # of many little headers in the include directory.
665 libio-include = -I$(..)libio
667 # These are the variables that the implicit compilation rules use.
668 # Note that we can't use -std=* in CPPFLAGS, because it overrides
669 # the implicit -lang-asm and breaks cpp behavior for .S files--notably
670 # it causes cpp to stop predefining __ASSEMBLER__.
671 CPPFLAGS = $($(subdir)-CPPFLAGS) $(+includes) $(defines) \
672 -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
673 $(CPPFLAGS-$(suffix $@)) \
674 $(foreach lib,$(libof-$(basename $(@F))) \
675 $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
676 $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
677 override CFLAGS = -std=gnu99 \
678 $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
679 $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
681 override CXXFLAGS = $(c++-sysincludes) \
682 $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
683 $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
685 # If everything is compiled with -fPIC (implicitly) we must tell this by
686 # defining the PIC symbol.
687 ifeq (yes,$(build-pic-default))
691 # Enable object files for different versions of the library.
692 # Various things use $(object-suffixes) to know what all to make.
693 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
694 # to pass different flags for each flavor.
695 libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
696 all-object-suffixes := .o .os .op .og .ob .oS
698 CPPFLAGS-.o = $(pic-default)
699 CFLAGS-.o = $(filter %frame-pointer,$(+cflags))
700 ifeq (yes,$(build-static))
702 object-suffixes += .o
704 ifeq (yes,$(build-shared))
705 # Under --enable-shared, we will build a shared library of PIC objects.
706 # The PIC object files are named foo.os.
707 object-suffixes += .os
708 CPPFLAGS-.os = -DPIC -DSHARED
709 CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
710 libtype.os := lib%_pic.a
711 # This can be changed by a sysdep makefile
713 # This one should always stay like this unless there is a very good reason.
716 ifeq (yes,$(build-profile))
717 # Under --enable-profile, we will build a static library of profiled objects.
718 # The profiled object files are named foo.op.
719 object-suffixes += .op
720 CPPFLAGS-.op = -DPROF $(pic-default)
722 libtype.op = lib%_p.a
724 ifeq (yes,$(build-omitfp))
725 # Under --enable-omitfp, we build the library optimized without
726 # debugging information using -fomit-frame-pointer, and build an extra
727 # library with debugging information. The debuggable objects are named foo.og.
728 object-suffixes += .og
729 CPPFLAGS-.og = $(pic-default)
731 CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES
732 CFLAGS-.os += -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES
733 libtype.og = lib%_g.a
737 ifeq (yes,$(build-bounded))
738 # Under --enable-bounded, we build the library with `-fbounded-pointers -g'
739 # to runtime bounds checking. The bounded-pointer objects are named foo.ob.
740 # We disable sibling-call optimizations so that stack traces will be complete
741 # and thus aid debugging, since after all, BPs are a debugging tool.
742 object-suffixes += .ob
743 CPPFLAGS-.ob = -fbounded-pointers $(pic-default)
744 CFLAGS-.ob = -g -O2 -fno-optimize-sibling-calls -fno-strict-aliasing
745 libtype.ob = lib%_b.a
748 object-suffixes-for-libc := $(object-suffixes)
750 ifeq (yes,$(build-shared))
751 # Build special library that contains the static-only routines for libc.
752 object-suffixes-for-libc += .oS
754 # Must build the routines as PIC, though, because they can end up in (users')
755 # shared objects. We don't want to use CFLAGS-os because users may, for
756 # example, make that processor-specific.
757 CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag)
758 CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
759 libtype.oS = lib%_nonshared.a
762 # The assembler can generate debug information too.
764 ifeq ($(have-cpp-asm-debuginfo),yes)
765 ASFLAGS := $(filter -g%,$(CFLAGS))
770 ASFLAGS += $(ASFLAGS-config)
776 move-if-change = $(SHELL) $(..)scripts/move-if-change
778 -include $(common-objpfx)sysd-sorted
779 subdirs = $(sorted-subdirs)
780 subdir-srcdirs = $(foreach dir,$(subdirs),\
781 $(firstword $($(dir)-srcdir) $(..)$(dir)))
783 ifeq (yes, $(build-shared))
785 # This is a pair of implicit rules to preprocess a file with # comments,
786 # %ifdef et al, based on config.h settings or other %include'd files.
787 # We use chained rules instead of a pipeline here so that we can properly
788 # check the exit status of cpp rather than using its bad output when there
789 # is a preprocessing error. Another rule should depend on the output file
790 # `FOO.v', and along with that `FOO.v.i' should be given dependencies
791 # listing both its input files, and any header files that it may reference
793 %.v.i: $(common-objpfx)config.h
794 sed '/^[ ]*#/d;s/^[ ]*%/#/' $(filter-out FORCE %.h,$^) \
795 | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \
799 sed '/^[ ]*#/d;/^[ ]*$$/d' $< > $@T
802 # Process the shlib-versions file, which tells us what shared library
803 # version numbers to use when we install shared objects on this system.
804 # We need to wait until $(subdirs) is complete.
805 ifeq ($(sysd-sorted-done),t)
806 -include $(common-objpfx)soversions.mk
807 ifndef avoid-generated
808 # This lets add-ons give more-specific matches that override defaults
809 # in the top-level file.
810 $(common-objpfx)shlib-versions.v.i: \
811 $(wildcard $(+sysdep_dirs:=/shlib-versions) \
812 $(subdir-srcdirs:=/shlib-versions)) \
815 soversions-default-setname = $(patsubst %, %,\
816 $(filter-out %_default,\
817 $(oldest-abi:%=GLIBC_%)))
818 $(common-objpfx)soversions.i: $(..)scripts/soversions.awk \
819 $(common-objpfx)shlib-versions.v
820 $(AWK) -v default_setname='$(soversions-default-setname)' \
821 -v cpu='$(config-machine)' \
822 -v vendor='$(config-vendor)' \
823 -v os='$(config-os)' \
826 $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
827 (seen_DEFAULT=0; seen_WORDSIZE32=0; seen_WORDSIZE64=0; \
828 while read which lib number setname; do \
829 eval seen_$$which=1; \
830 test x"$$which" = xDEFAULT || continue; \
832 [0-9]*) echo "$$lib.so-version=.$$number"; \
833 echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
834 *) echo "$$lib.so-version=$$number"; \
835 echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
838 case "$$seen_DEFAULT$$seen_WORDSIZE32$$seen_WORDSIZE64" in \
839 100) echo biarch = no;; \
840 101) echo biarch = 32;; \
841 ?1?) echo biarch = 64;; \
842 *) echo >&2 BUG; exit 2;; \
844 echo soversions.mk-done = t;) < $< > $@T; exit 0
849 postclean-generated += soversions.mk soversions.i \
850 shlib-versions.v shlib-versions.v.i
852 # Generate the header containing the names of all shared libraries.
853 # We use a stamp file to avoid unnecessary recompilations.
854 before-compile += $(common-objpfx)gnu/lib-names.h
855 ifeq ($(soversions.mk-done),t)
856 $(common-objpfx)gnu/lib-names.h: $(common-objpfx)gnu/lib-names.stmp; @:
857 $(common-objpfx)gnu/lib-names.stmp: $(..)scripts/lib-names.awk \
858 $(common-objpfx)soversions.i
859 $(make-target-directory)
860 @rm -f ${@:stmp=T} $@
861 $(AWK) -f $^ > ${@:stmp=T}
862 $(move-if-change) ${@:stmp=T} ${@:stmp=h}
866 common-generated += gnu/lib-names.h gnu/lib-names.stmp
868 # The name under which the run-time dynamic linker is installed.
869 # We are currently going for the convention that `/lib/ld.so.1'
870 # names the SVR4/ELF ABI-compliant dynamic linker.
871 ifndef rtld-installed-name
873 rtld-installed-name = $(ld.so-version)
875 rtld-installed-name = ld.so.1
879 ifndef rtld-version-installed-name
880 rtld-version-installed-name = ld-$(version).so
888 ifeq ($(build-shared),yes)
889 libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
891 libdl = $(common-objpfx)dlfcn/libdl.a
894 ifneq (,$(findstring aix,$(config-os)))
895 ifeq ($(build-shared),yes)
897 libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
899 # No libdl without shared libs on AIX
904 # No ELF, no AIX - no libdl, at least for now.
910 # These are the subdirectories containing the library source. The order
911 # is more or less arbitrary. The sorting step will take care of the
913 all-subdirs = csu assert ctype locale intl catgets math setjmp signal \
914 stdlib stdio-common libio malloc string wcsmbs time dirent \
915 grp pwd posix io termios resource misc socket sysvipc gmon \
916 gnulib iconv iconvdata wctype manual shadow po argp \
917 crypt nss localedata timezone rt conform debug \
918 $(add-on-subdirs) $(dlfcn) $(binfmt-subdir)
920 ifndef avoid-generated
921 all-Depend-files := $(wildcard $(foreach dir,$(all-subdirs),\
922 $(firstword $($(dir)-srcdir) \
923 $(..)$(dir))/Depend))
924 $(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \
925 $(common-objpfx)config.make $(..)Makeconfig \
926 $(wildcard $(sysdirs:=/Subdirs)) \
929 -v subdirs='$(all-subdirs)' \
931 $(filter %/Subdirs %/Depend,$^) > $@-tmp
933 $(all-Depend-files): ;
936 # Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
937 sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig))
938 ifneq (,$(sysdep-makeconfigs))
939 include $(sysdep-makeconfigs)
943 endif # Makeconfig not yet included