1 # Copyright (C) 1991-2016 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, see
16 # <http://www.gnu.org/licenses/>.
19 # Makefile configuration options for the GNU C library.
22 This makefile requires GNU Make.
25 all: # Make this the default goal
27 ifneq "$(origin +included-Makeconfig)" "file"
29 +included-Makeconfig := yes
35 # $(common-objdir) is the place to put objects and
36 # such that are not specific to a single subdir.
38 objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/)
39 common-objpfx = $(objdir)/
40 common-objdir = $(objdir)
42 objdir must be defined by the build-directory Makefile.
45 # Root of the sysdeps tree.
46 sysdep_dir := $(..)sysdeps
47 export sysdep_dir := $(sysdep_dir)
49 # Get the values defined by options to `configure'.
50 include $(common-objpfx)config.make
52 # What flags to give to sources which call user provided callbacks
53 uses-callbacks = -fexceptions
55 # What flags to give to tests which test stack alignment
56 stack-align-test-flags =
58 # Complete path to sysdep dirs.
59 # `configure' writes a definition of `config-sysdirs' in `config.make'.
60 sysdirs := $(foreach D,$(config-sysdirs),$(firstword $(filter /%,$D) $(..)$D))
62 # Add-ons that contribute sysdeps trees get added to the include list
63 # after sysdeps/generic. This makes #include <sysdeps/...> work right
64 # to find specific add-on files without assuming the add-on directory name.
65 # It also means that headers can go into an add-on's base directory
66 # instead of the add-on needing a sysdeps/generic of its own.
67 sysdeps-srcdirs := $(foreach add-on,$(sysdeps-add-ons),\
68 $(firstword $(filter /%,$(add-on)) \
70 +sysdep_dirs = $(sysdirs) $(sysdeps-srcdirs)
72 +sysdep_dirs := $(objdir) $(+sysdep_dirs)
75 # Run config.status to update config.make and config.h. We don't show the
76 # dependence of config.h to Make, because it is only touched when it
77 # changes and so config.status would be run every time; the dependence of
78 # config.make should suffice to force regeneration and re-exec, and the new
79 # image will notice if config.h changed.
80 $(common-objpfx)config.make: $(common-objpfx)config.status \
81 $(..)config.make.in $(..)config.h.in
82 cd $(<D); $(SHELL) $(<F)
84 # Find all the add-on and sysdeps configure fragments, to make sure we
85 # re-run configure when any of them changes.
86 $(common-objpfx)config.status: $(..)version.h $(..)configure \
87 $(foreach dir,$(sysdirs),\
88 $(wildcard $(dir)/Implies) \
90 $(firstword $(wildcard \
91 $(addprefix $(dir)/,configure configure.ac))))) \
93 $(wildcard $(..)sysdeps/*/preconfigure $(..)sysdeps/*/preconfigure.ac)) \
95 $(foreach add-on,$(add-ons),\
96 $(firstword $(wildcard \
97 $(addprefix $(firstword $(filter /%,$(add-on)) $(..)$(add-on))/,\
98 configure configure.ac))) \
99 $(wildcard $(addprefix $(firstword $(filter /%,$(add-on)) $(..)$(add-on))/,\
100 sysdeps/*/preconfigure sysdeps/*/preconfigure.ac))))
101 @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
102 echo The GNU C library has not been configured. >&2; \
103 echo Run \`configure\' to configure it before building. >&2; \
104 echo Try \`configure --help\' for more details. >&2; \
107 # We don't want CPPFLAGS to be exported to the command running configure.
110 # Get the user's configuration parameters.
111 ifneq ($(wildcard $(..)configparms),)
112 include $(..)configparms
115 ifneq ($(wildcard $(common-objpfx)configparms),)
116 include $(common-objpfx)configparms
121 #### These are the configuration variables. You can define values for
122 #### the variables below in the file `configparms'.
123 #### Do NOT edit this file.
127 # Common prefix for machine-independent installation directories.
128 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
132 # Decide whether we shall build the programs or not. We always do this
133 # unless the user tells us (in configparms) or we are building for a
135 ifndef build-programs
136 ifneq ($(config-os),none)
143 # Common prefix for machine-dependent installation directories.
144 ifeq ($(origin exec_prefix),undefined)
145 exec_prefix = $(prefix)
148 # Where to install the library and object files.
150 libdir = $(exec_prefix)/lib
152 inst_libdir = $(install_root)$(libdir)
154 # Where to install the shared library.
156 slibdir = $(exec_prefix)/lib
158 inst_slibdir = $(install_root)$(slibdir)
160 # Where to install the dynamic linker.
164 inst_rtlddir = $(install_root)$(rtlddir)
166 # Prefix to put on files installed in $(libdir). For libraries `libNAME.a',
167 # the prefix is spliced between `lib' and the name, so the linker switch
168 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
169 # just prepended to the whole file name.
170 ifeq ($(origin libprefix),undefined)
174 # Where to install the header files.
176 includedir = $(prefix)/include
178 inst_includedir = $(install_root)$(includedir)
180 # Where to install machine-independent data files.
181 # These are the timezone database, and the locale database.
183 datadir = $(prefix)/share
185 inst_datadir = $(install_root)$(datadir)
187 # Where to install the timezone data files (which are machine-independent).
189 zonedir = $(datadir)/zoneinfo
191 inst_zonedir = $(install_root)$(zonedir)
193 # Where to install the compiled binary locale archive and compiled
194 # binary locale files.
196 complocaledir = $(libdir)/locale
198 inst_complocaledir = $(install_root)$(complocaledir)
200 # Where to install the message catalog data files (which are
201 # machine-independent).
203 localedir = $(datadir)/locale
205 inst_localedir = $(install_root)$(localedir)
207 # Where to install the locale charmap source files.
209 i18ndir = $(datadir)/i18n
211 inst_i18ndir = $(install_root)$(i18ndir)
213 # Where to install the shared object for charset transformation.
215 gconvdir = $(libdir)/gconv
217 inst_gconvdir = $(install_root)$(gconvdir)
219 # Where to install programs.
221 bindir = $(exec_prefix)/bin
223 inst_bindir = $(install_root)$(bindir)
225 # Where to install internal programs.
227 libexecdir = $(exec_prefix)/libexec
229 inst_libexecdir = $(install_root)$(libexecdir)
231 # Where to install administrative programs.
233 rootsbindir = $(exec_prefix)/sbin
235 inst_rootsbindir = $(install_root)$(rootsbindir)
238 sbindir = $(exec_prefix)/sbin
240 inst_sbindir = $(install_root)$(sbindir)
242 # Where to install the Info files.
244 infodir = $(prefix)/info
246 inst_infodir = $(install_root)$(infodir)
248 # Where to install audit libraries.
250 auditdir = $(libdir)/audit
252 inst_auditdir = $(install_root)$(auditdir)
254 # Where to install default configuration files. These include the local
255 # timezone specification and network data base files.
257 sysconfdir = $(prefix)/etc
259 inst_sysconfdir = $(install_root)$(sysconfdir)
261 # Directory for the database files and Makefile for nss_db.
263 vardbdir = $(localstatedir)/db
265 inst_vardbdir = $(install_root)$(vardbdir)
267 # Where to install the "localtime" timezone file; this is the file whose
268 # contents $(localtime) specifies. If this is a relative pathname, it is
269 # relative to $(zonedir). It is a good idea to put this somewhere
270 # other than there, so the zoneinfo directory contains only universal data,
271 # localizing the configuration data elsewhere.
272 ifndef localtime-file
273 localtime-file = $(sysconfdir)/localtime
276 # What to use for leap second specifications in compiling the default
277 # timezone files. Set this to `/dev/null' for no leap second handling as
278 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
279 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
280 # This variable determines the default: if it's `/dev/null',
281 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
283 leapseconds = /dev/null
286 # What timezone's DST rules should be used when a POSIX-style TZ
287 # environment variable doesn't specify any rules. For 1003.1 compliance
288 # this timezone must use rules that are as U.S. federal law defines DST.
289 # Run `make -C time echo-zonenames' to see a list of available zone names.
290 # This setting can be changed with `zic -p TIMEZONE' at any time.
291 # If you want POSIX.1 compatibility, use `America/New_York'.
293 posixrules = America/New_York
296 # Where to install the "posixrules" timezone file; this is file
297 # whose contents $(posixrules) specifies. If this is a relative
298 # pathname, it is relative to $(zonedir).
299 ifndef posixrules-file
300 posixrules-file = posixrules
304 # Directory where your system's native header files live.
305 # This is used on Unix systems to generate some GNU libc header files.
307 sysincludedir = /usr/include
311 # Commands to install files.
313 INSTALL_DATA = $(INSTALL) -m 644
315 ifndef INSTALL_SCRIPT
316 INSTALL_SCRIPT = $(INSTALL)
318 ifndef INSTALL_PROGRAM
319 INSTALL_PROGRAM = $(INSTALL)
326 # The name of the C compiler.
327 # If you've got GCC, and it works, use it.
328 ifeq ($(origin CC),default)
332 # The name of the C compiler to use for compilations of programs to run on
333 # the host that is building the library. If you set CC to a
334 # cross-compiler, you must set this to the normal compiler.
339 # Default flags to pass the C compiler.
340 ifndef default_cflags
341 ifeq ($(release),stable)
342 default_cflags := -g -O2
344 default_cflags := -g -O
348 # Flags to pass the C compiler when assembling preprocessed assembly code
354 as-needed := -Wl,--as-needed
355 no-as-needed := -Wl,--no-as-needed
357 # Must be supported by the linker.
358 no-whole-archive = -Wl,--no-whole-archive
359 whole-archive = -Wl,--whole-archive
361 # Installed name of the startup code.
362 # The ELF convention is that the startfile is called crt1.o
363 start-installed-name = crt1.o
364 # On systems that do not need a special startfile for statically linked
365 # binaries, simply set it to the normal name.
366 ifndef static-start-installed-name
367 static-start-installed-name = $(start-installed-name)
370 ifeq (yesyes,$(build-shared)$(have-z-combreloc))
371 combreloc-LDFLAGS = -Wl,-z,combreloc
372 LDFLAGS.so += $(combreloc-LDFLAGS)
373 LDFLAGS-rtld += $(combreloc-LDFLAGS)
376 relro-LDFLAGS = -Wl,-z,relro
377 LDFLAGS.so += $(relro-LDFLAGS)
378 LDFLAGS-rtld += $(relro-LDFLAGS)
380 ifeq (yes,$(have-hash-style))
381 # For the time being we unconditionally use 'both'. At some time we
382 # should declare statically linked code as 'out of luck' and compile
383 # with --hash-style=gnu only.
384 hashstyle-LDFLAGS = -Wl,--hash-style=both
385 LDFLAGS.so += $(hashstyle-LDFLAGS)
386 LDFLAGS-rtld += $(hashstyle-LDFLAGS)
389 # Command to run after every final link (executable or shared object).
390 # This is invoked with $(call after-link,...), so it should operate on
391 # the file $1. This can be set to do some sort of post-processing on
392 # binaries, or to perform some sort of static sanity check.
397 # Command for linking PIE programs with the C library.
399 +link-pie-before-libc = $(CC) -pie -Wl,-O1 -nostdlib -nostartfiles -o $@ \
400 $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
401 $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
402 $(addprefix $(csu-objpfx),S$(start-installed-name)) \
403 $(+preinit) $(+prectorS) \
404 $(filter-out $(addprefix $(csu-objpfx),start.o \
405 S$(start-installed-name))\
406 $(+preinit) $(link-extra-libs) \
407 $(common-objpfx)libc% $(+postinit),$^) \
409 +link-pie-after-libc = $(+postctorS) $(+postinit)
411 $(+link-pie-before-libc) $(rtld-LDFLAGS) $(link-libc) $(+link-pie-after-libc)
412 $(call after-link,$@)
414 define +link-pie-tests
415 $(+link-pie-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
416 $(+link-pie-after-libc)
417 $(call after-link,$@)
420 # Command for statically linking programs with the C library.
422 +link-static-before-libc = $(CC) -nostdlib -nostartfiles -static -o $@ \
423 $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
424 $(addprefix $(csu-objpfx),$(static-start-installed-name)) \
425 $(+preinit) $(+prectorT) \
426 $(filter-out $(addprefix $(csu-objpfx),start.o \
427 $(start-installed-name))\
428 $(+preinit) $(link-extra-libs-static) \
429 $(common-objpfx)libc% $(+postinit),$^) \
430 $(link-extra-libs-static)
431 +link-static-after-libc = $(+postctorT) $(+postinit)
433 $(+link-static-before-libc) $(link-libc-static) $(+link-static-after-libc)
434 $(call after-link,$@)
436 define +link-static-tests
437 $(+link-static-before-libc) $(link-libc-static-tests) $(+link-static-after-libc)
438 $(call after-link,$@)
441 # Commands for linking programs with the C library.
443 ifeq (yes,$(build-shared))
444 ifeq (yes,$(build-pie-default))
445 no-pie-ldflag = -no-pie
447 +link-tests = $(+link-pie-tests)
449 +link-before-libc = $(CC) -nostdlib -nostartfiles -o $@ \
450 $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
451 $(combreloc-LDFLAGS) $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
452 $(addprefix $(csu-objpfx),$(start-installed-name)) \
453 $(+preinit) $(+prector) \
454 $(filter-out $(addprefix $(csu-objpfx),start.o \
455 $(start-installed-name))\
456 $(+preinit) $(link-extra-libs) \
457 $(common-objpfx)libc% $(+postinit),$^) \
459 +link-after-libc = $(+postctor) $(+postinit)
461 $(+link-before-libc) $(rtld-LDFLAGS) $(link-libc) $(+link-after-libc)
462 $(call after-link,$@)
465 $(+link-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
467 $(call after-link,$@)
471 +link = $(+link-static)
472 +link-tests = $(+link-static-tests)
475 ifeq (yes,$(build-shared))
477 rtld-LDFLAGS = -Wl,-dynamic-linker=$(rtlddir)/$(rtld-installed-name)
479 ifndef rtld-tests-LDFLAGS
480 ifeq (yes,$(build-hardcoded-path-in-tests))
481 rtld-tests-LDFLAGS = -Wl,-dynamic-linker=$(elf-objpfx)ld.so
483 rtld-tests-LDFLAGS = $(rtld-LDFLAGS)
488 ifeq (yes,$(build-shared))
489 # We need the versioned name of libc.so in the deps of $(others) et al
490 # so that the symlink to libc.so is created before anything tries to
491 # run the linked programs.
492 link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link)
493 ifeq (yes,$(build-hardcoded-path-in-tests))
494 link-libc-tests-rpath-link = -Wl,-rpath=$(rpath-link)
496 link-libc-tests-rpath-link = $(link-libc-rpath-link)
498 link-libc-before-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
499 $(common-objpfx)$(patsubst %,$(libtype.oS),c) \
500 $(as-needed) $(elf-objpfx)ld.so \
502 link-libc = $(link-libc-rpath-link) $(link-libc-before-gnulib) $(gnulib)
503 link-libc-tests = $(link-libc-tests-rpath-link) \
504 $(link-libc-before-gnulib) $(gnulib-tests)
505 # This is how to find at build-time things that will be installed there.
506 rpath-dirs = math elf dlfcn nss nis rt resolv crypt mathvec
508 $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
510 link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
511 link-libc-tests = $(common-objpfx)libc.a $(otherlibs) $(gnulib-tests) $(common-objpfx)libc.a $(gnulib-tests)
515 # Differences in the linkers on the various platforms.
516 LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
517 LDFLAGS-soname-fname = -Wl,-soname,$(@F)
518 LDFLAGS-rdynamic = -rdynamic
519 LDFLAGS-Bsymbolic = -Bsymbolic
521 # Choose the default search path for the dynamic linker based on
522 # where we will install libraries.
523 ifneq ($(libdir),$(slibdir))
524 default-rpath = $(slibdir):$(libdir)
526 default-rpath = $(libdir)
529 ifndef link-extra-libs
530 link-extra-libs = $(LDLIBS-$(@F))
531 link-extra-libs-static = $(link-extra-libs)
534 # The static libraries.
535 link-libc-static = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib) -Wl,--end-group
536 link-libc-static-tests = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib-tests) -Wl,--end-group
538 # How to link against libgcc. Some libgcc functions, such as those
539 # for "long long" arithmetic or software floating point, can always be
540 # built without use of C library headers and do not have any global
541 # state so can safely be linked statically into any executable or
542 # shared library requiring them; these functions are in libgcc.a.
543 # Other functions, relating to exception handling, may require C
544 # library headers to build and it may not be safe to have more than
545 # one copy of them in a process; these functions are only in
546 # libgcc_s.so and libgcc_eh.a.
548 # To avoid circular dependencies when bootstrapping, it is desirable
549 # to avoid use of libgcc_s and libgcc_eh in building glibc. Where any
550 # glibc functionality (in particular, thread cancellation) requires
551 # exception handling, this is implemented through dlopen of libgcc_s
552 # to avoid unnecessary dependencies on libgcc_s by programs not using
553 # that functionality; executables built with glibc do not use
554 # exception handling other than through thread cancellation.
556 # Undefined references to functions from libgcc_eh or libgcc_s may
557 # arise for code built with -fexceptions. In the case of statically
558 # linked programs installed by glibc, unwinding will never actually
559 # occur at runtime and the use of elf/static-stubs.c to resolve these
560 # references is safe. In the case of statically linked test programs
561 # and test programs built with -fexceptions, unwinding may occur in
562 # some cases and it is preferable to link with libgcc_eh or libgcc_s
563 # so that the testing is as similar as possible to how programs will
564 # be built with the installed glibc.
566 # Some architectures have architecture-specific systems for exception
567 # handling that may involve undefined references to
568 # architecture-specific functions. On those architectures,
569 # gnulib-arch and static-gnulib-arch may be defined in sysdeps
570 # makefiles to use additional libraries for linking executables and
571 # shared libraries built by glibc.
573 ifneq ($(have-cc-with-libunwind),yes)
578 libgcc_eh := -Wl,--as-needed -lgcc_s $(libunwind) -Wl,--no-as-needed
580 gnulib = -lgcc $(gnulib-arch)
581 gnulib-tests := -lgcc $(libgcc_eh)
583 # By default, elf/static-stubs.o, instead of -lgcc_eh, is used to
584 # statically link programs. When --disable-shared is used, we use
585 # -lgcc_eh since elf/static-stubs.o isn't sufficient.
586 ifeq (yes,$(build-shared))
587 static-gnulib = -lgcc $(static-gnulib-arch)
589 static-gnulib = -lgcc -lgcc_eh $(static-gnulib-arch)
591 static-gnulib-tests := -lgcc -lgcc_eh $(libunwind)
592 libc.so-gnulib := -lgcc
594 +preinit = $(addprefix $(csu-objpfx),crti.o)
595 +postinit = $(addprefix $(csu-objpfx),crtn.o)
596 +prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbegin.o`
597 +postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
598 # Variants of the two previous definitions for linking PIE programs.
599 +prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o`
600 +postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o`
601 # Variants of the two previous definitions for statically linking programs.
602 +prectorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o`
603 +postctorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
604 csu-objpfx = $(common-objpfx)csu/
605 elf-objpfx = $(common-objpfx)elf/
607 # A command that, prepended to the name and arguments of a program,
608 # and run on the build system, causes that program with those
609 # arguments to be run on the host for which the library is built.
613 # Likewise, but the name of the program is preceded by
614 # <variable>=<value> assignments for environment variables.
615 ifndef test-wrapper-env
616 test-wrapper-env = $(test-wrapper) env
618 # Likewise, but the program's environment will be empty except for any
619 # explicit <variable>=<value> assignments preceding the program name.
620 ifndef test-wrapper-env-only
621 test-wrapper-env-only = $(test-wrapper) env -i
624 # Whether to run test programs built for the library's host system.
625 ifndef run-built-tests
626 ifeq (yes|,$(cross-compiling)|$(test-wrapper))
629 run-built-tests = yes
633 # Whether to stop immediately when a test fails. Nonempty means to
634 # stop, empty means not to stop.
635 ifndef stop-on-test-failure
636 stop-on-test-failure =
639 # How to run a program we just linked with our library.
640 # The program binary is assumed to be $(word 2,$^).
641 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
642 rtld-prefix = $(elf-objpfx)$(rtld-installed-name) \
644 $(rpath-link)$(patsubst %,:%,$(sysdep-library-path))
645 ifeq (yes,$(build-shared))
647 sysdep-library-path = \
648 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
649 $(filter -Wl$(comma)-rpath-link=%,\
650 $(sysdep-LDFLAGS)))))
651 # $(run-via-rtld-prefix) is a command that, when prepended to the name
652 # of a program built with the newly built library, produces a command
653 # that, executed on the host for which the library is built, runs that
654 # program. For tests listed in tests-static or xtests-static, it is
656 run-via-rtld-prefix = \
657 $(if $(strip $(filter $(notdir $(built-program-file)), \
658 $(tests-static) $(xtests-static))),, $(rtld-prefix))
660 run-via-rtld-prefix =
662 # $(run-program-env) is the default environment variable settings to
663 # use when running a program built with the newly built library.
664 run-program-env = GCONV_PATH=$(common-objpfx)iconvdata \
665 LOCPATH=$(common-objpfx)localedata LC_ALL=C
666 # $(run-program-prefix) is a command that, when prepended to the name
667 # of a program built with the newly built library, produces a command
668 # that, executed on the build system on which "make" is run, runs that
669 # program. $(run-program-prefix-before-env) and
670 # $(run-program-prefix-after-env) are similar, but separate parts
671 # before and after a list of environment variables.
672 run-program-prefix-before-env = $(test-wrapper-env)
673 run-program-prefix-after-env = $(run-via-rtld-prefix)
674 run-program-prefix = $(run-program-prefix-before-env) $(run-program-env) \
675 $(run-program-prefix-after-env)
676 # $(built-program-cmd) is a command that, executed on the build system
677 # on which "make" is run, runs the newly built program that is the
678 # second dependency of the makefile target in which
679 # $(built-program-cmd) is used. $(built-program-cmd-before-env) and
680 # $(built-program-cmd-after-env) are similar, before and after a list
681 # of environment variables.
682 built-program-cmd-before-env = $(test-wrapper-env)
683 built-program-cmd-after-env = $(run-via-rtld-prefix) $(built-program-file)
684 built-program-cmd = $(built-program-cmd-before-env) $(run-program-env) \
685 $(built-program-cmd-after-env)
686 # $(host-built-program-cmd) is a command that, executed on the host
687 # for which the library is built, runs the newly built program that is
688 # the second dependency of the makefile target in which
689 # $(host-built-program-cmd) is used.
690 host-built-program-cmd = $(run-via-rtld-prefix) $(built-program-file)
696 # $(test-via-rtld-prefix) is a command that, when prepended to the name
697 # of a test program built with the newly built library, produces a command
698 # that, executed on the host for which the library is built, runs that
699 # program. For tests listed in tests-static or xtests-static as well
700 # as when test programs are hardcoded to the newly built libraries, it
703 # $(test-program-prefix) is a command that, when prepended to the name
704 # of a test program built with the newly built library, produces a command
705 # that, executed on the build system on which "make" is run, runs that
706 # test program. $(test-program-prefix-before-env) and
707 # $(test-program-prefix-after-env) are similar, before and after a
708 # list of environment variables.
710 # $(test-program-cmd) is a command that, executed on the build system
711 # on which "make" is run, runs the newly built test program that is the
712 # second dependency of the makefile target in which
713 # $(test-program-cmd) is used. $(test-program-cmd-before-env) and
714 # $(test-program-cmd-after-env) are similar, before and after a list
715 # of environment variables.
717 # $(host-test-program-cmd) is a command that, executed on the host
718 # for which the library is built, runs the newly built test program that
719 # is the second dependency of the makefile target in which
720 # $(host-test-program-cmd) is used.
722 ifeq (yes,$(build-hardcoded-path-in-tests))
723 test-via-rtld-prefix =
724 test-program-prefix-before-env = $(test-wrapper-env)
725 test-program-prefix-after-env =
726 test-program-prefix = $(test-program-prefix-before-env) $(run-program-env) \
727 $(test-program-prefix-after-env)
728 test-program-cmd-before-env = $(test-wrapper-env)
729 test-program-cmd-after-env = $(built-program-file)
730 test-program-cmd = $(test-program-cmd-before-env) $(run-program-env) \
731 $(test-program-cmd-after-env)
732 host-test-program-cmd = $(built-program-file)
734 test-via-rtld-prefix = $(run-via-rtld-prefix)
735 test-program-prefix-before-env = $(run-program-prefix-before-env)
736 test-program-prefix-after-env = $(run-program-prefix-after-env)
737 test-program-prefix = $(run-program-prefix)
738 test-program-cmd-before-env = $(built-program-cmd-before-env)
739 test-program-cmd-after-env = $(built-program-cmd-after-env)
740 test-program-cmd = $(built-program-cmd)
741 host-test-program-cmd = $(host-built-program-cmd)
744 # Extra flags to pass to GCC.
745 ifeq ($(all-warnings),yes)
746 +gccwarn := -Wall -Wwrite-strings -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
748 +gccwarn := -Wall -Wwrite-strings
751 ifeq ($(enable-werror),yes)
754 +gccwarn-c = -Wstrict-prototypes -Wold-style-definition
756 # We do not depend on the address of constants in different files to be
757 # actually different, so allow the compiler to merge them all.
758 +merge-constants = -fmerge-all-constants
760 # We have to assume that glibc functions are called in any rounding
761 # mode and also change the rounding mode in a few functions. So,
762 # disable any optimization that assume default rounding mode.
763 +math-flags = -frounding-math
765 # This is the program that generates makefile dependencies from C source files.
766 # The -MP flag tells GCC >= 3.2 (which we now require) to produce dummy
767 # targets for headers so that removed headers don't break the build.
769 +mkdep = $(CC) -M -MP
772 # The program that makes Emacs-style TAGS files.
775 # The `xgettext' program for producing .pot files from sources.
780 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
781 # perhaps others) to preprocess assembly code in some cases.
784 # To force installation of files even if they are older than the
785 # installed files. This variable is included in the dependency list
786 # of all installation targets.
787 ifeq ($(force-install),yes)
788 +force = force-install
794 #### End of configuration variables.
797 # This tells some versions of GNU make before 3.63 not to export all variables.
800 # We want to echo the commands we're running without
801 # umpteen zillion filenames along with it (we use `...' instead)
802 # but we don't want this echoing done when the user has said
803 # he doesn't want to see commands echoed by using -s.
804 ifneq "$(findstring s,$(MAKEFLAGS))" "" # if -s
805 +cmdecho := echo >/dev/null
810 # These are the flags given to the compiler to tell
811 # it what sort of optimization and/or debugging output to do.
813 # If `CFLAGS' was defined, use that.
815 +cflags := $(filter-out -I%,$(CFLAGS))
819 # If none of the above worked, default to "-g -O".
820 ifeq "$(strip $(+cflags))" ""
821 +cflags := $(default_cflags)
822 endif # $(+cflags) == ""
824 +cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags)
827 # Don't duplicate options if we inherited variables from the parent.
828 +cflags := $(sort $(+cflags))
830 # Each sysdeps directory can contain header files that both will be
831 # used to compile and will be installed. Each can also contain an
832 # include/ subdirectory, whose header files will be used to compile
833 # but will not be installed, and will take precedence over the
834 # installed files. This mirrors the top-level include/ subdirectory.
835 +sysdep-includes := $(foreach dir,$(+sysdep_dirs),\
836 $(addprefix -I,$(wildcard $(dir)/include) $(dir)))
838 # These are flags given to the C compiler to tell it to look for
839 # include files (including ones given in angle brackets) in the parent
840 # library source directory, in the include directory, and in the
842 +includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \
843 $(+sysdep-includes) $(includes) \
844 $(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes)
846 # Since libio has several internal header files, we use a -I instead
847 # of many little headers in the include directory.
848 libio-include = -I$(..)libio
850 # List of non-library modules that we build.
851 built-modules = iconvprogs iconvdata ldconfig lddlibc4 libmemusage \
852 libSegFault libpcprofile librpcsvc locale-programs \
853 memusagestat nonlib nscd extramodules libnldbl
855 in-module = $(subst -,_,$(firstword $(libof-$(basename $(@F))) \
860 # Build ld.so, libc.so and libpthread.so with -ftls-model=initial-exec
861 tls-model = $(if $(filter libpthread rtld \
862 libc,$(in-module)),-ftls-model=initial-exec,)
864 module-cppflags-real = -include $(common-objpfx)libc-modules.h \
865 -DMODULE_NAME=$(in-module)
867 # We don't need libc-modules.h and the MODULE_NAME definition for .v.i
868 # files. These targets don't (and will likely never need to) use the IS_IN
869 # facility. In fact, shlib-versions should not use it because that will
870 # create a circular dependency as libc-modules.h is generated from
872 module-cppflags = $(if $(filter %.v.i,$(@F)),,$(module-cppflags-real))
874 # These are the variables that the implicit compilation rules use.
875 # Note that we can't use -std=* in CPPFLAGS, because it overrides
876 # the implicit -lang-asm and breaks cpp behavior for .S files--notably
877 # it causes cpp to stop predefining __ASSEMBLER__.
878 CPPFLAGS = $(config-extra-cppflags) $(CPPUNDEFS) $(CPPFLAGS-config) \
879 $($(subdir)-CPPFLAGS) \
880 $(+includes) $(defines) $(module-cppflags) \
881 -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
882 $(CPPFLAGS-$(suffix $@)) \
883 $(foreach lib,$(libof-$(basename $(@F))) \
884 $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
885 $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F)))
886 override CFLAGS = -std=gnu11 -fgnu89-inline $(config-extra-cflags) \
887 $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
888 $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
889 $(CFLAGS-$(@F)) $(tls-model) \
890 $(foreach lib,$(libof-$(basename $(@F))) \
891 $(libof-$(<F)) $(libof-$(@F)),$(CFLAGS-$(lib)))
892 # Use our copies of cstdlib and cmath.
893 override CXXFLAGS = -I$(common-objpfx) $(c++-sysincludes) \
894 $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
895 $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
897 # If everything is compiled with -fPIC (implicitly) we must tell this by
898 # defining the PIC symbol.
899 ifeq (yes,$(build-pic-default))
903 # Enable object files for different versions of the library.
904 # Various things use $(object-suffixes) to know what all to make.
905 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
906 # to pass different flags for each flavor.
907 libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
908 all-object-suffixes := .o .os .op .oS
910 CPPFLAGS-.o = $(pic-default)
911 CFLAGS-.o = $(filter %frame-pointer,$(+cflags))
913 object-suffixes += .o
914 ifeq (yes,$(build-shared))
915 # Under --enable-shared, we will build a shared library of PIC objects.
916 # The PIC object files are named foo.os.
917 object-suffixes += .os
918 CPPFLAGS-.os = -DPIC -DSHARED
919 CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
920 libtype.os := lib%_pic.a
921 # This can be changed by a sysdep makefile
923 # This one should always stay like this unless there is a very good reason.
926 # This can be changed by a sysdep makefile
928 # This one should always stay like this unless there is a very good reason.
930 ifeq (yes,$(build-profile))
931 # Under --enable-profile, we will build a static library of profiled objects.
932 # The profiled object files are named foo.op.
933 object-suffixes += .op
934 CPPFLAGS-.op = -DPROF $(pic-default)
936 libtype.op = lib%_p.a
939 # Convenience variable for when we want to treat shared-library cases
940 # differently from the rest.
941 object-suffixes-noshared := $(filter-out .os,$(object-suffixes))
943 object-suffixes-for-libc := $(object-suffixes)
945 ifeq (yes,$(build-shared))
946 # Build special library that contains the static-only routines for libc.
947 object-suffixes-for-libc += .oS
949 # Must build the routines as PIC, though, because they can end up in (users')
950 # shared objects. We don't want to use CFLAGS-os because users may, for
951 # example, make that processor-specific.
952 CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag)
953 CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
954 libtype.oS = lib%_nonshared.a
957 # The assembler can generate debug information too.
959 ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
961 ASFLAGS += -Werror=undef $(ASFLAGS-config) $(asflags-cpu)
967 move-if-change = $(SHELL) $(..)scripts/move-if-change
969 -include $(common-objpfx)sysd-sorted
970 subdirs = $(sorted-subdirs)
971 subdir-srcdirs = $(foreach dir,$(subdirs),\
972 $(firstword $($(dir)-srcdir) $(..)$(dir)))
974 # This is a pair of implicit rules to preprocess a file with # comments,
975 # %ifdef et al, based on config.h settings or other %include'd files.
976 # We use chained rules instead of a pipeline here so that we can properly
977 # check the exit status of cpp rather than using its bad output when there
978 # is a preprocessing error. Another rule should depend on the output file
979 # `FOO.v', and along with that `FOO.v.i' should be given dependencies
980 # listing both its input files, and any header files that it may reference
982 %.v.i: $(common-objpfx)config.h $(..)Makeconfig
983 sed '/^[ ]*%/!s/#.*$$//;/^[ ]*$$/d;s/^[ ]*%/#/' \
984 $(filter-out FORCE %.h $(..)Makeconfig,$^) \
985 | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \
989 sed '/^[ ]*#/d;/^[ ]*$$/d' $< > $@T
992 ifeq (yes, $(build-shared))
994 # To generate a header to support more than one ABI for different
995 # architecture variants, the CPU/Makefile defines abi-variants to be a
996 # list of names for those variants (e.g. 32 64), and, for each variant,
997 # defines abi-$(variant)-condition to be the condition for those options
998 # to use in a C #if condition. abi-includes may be defined to a list of
999 # headers to include in the generated header, if the default does not
1000 # suffice. default-abi is defined to be the ABI for the current glibc
1004 abi-includes := bits/wordsize.h
1007 # Process the shlib-versions file, which tells us what shared library
1008 # version numbers to use when we install shared objects on this system.
1009 # We need to wait until $(subdirs) is complete.
1010 ifeq ($(sysd-sorted-done),t)
1011 -include $(common-objpfx)soversions.mk
1012 ifndef avoid-generated
1013 # This lets add-ons give more-specific matches that override defaults
1014 # in the top-level file.
1015 $(common-objpfx)shlib-versions.v.i: \
1016 $(wildcard $(+sysdep_dirs:=/shlib-versions) \
1017 $(subdir-srcdirs:=/shlib-versions)) \
1020 $(common-objpfx)soversions.i: $(..)scripts/soversions.awk \
1021 $(common-objpfx)shlib-versions.v
1024 $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
1025 (while read which lib number setname; do \
1026 eval seen_$$which=1; \
1027 test x"$$which" = xDEFAULT || continue; \
1029 [0-9]*) echo "$$lib.so-version=.$$number"; \
1030 echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
1031 *) echo "$$lib.so-version=$$number"; \
1032 echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
1035 echo soversions.mk-done = t;) < $< > $@T; exit 0
1040 postclean-generated += soversions.mk soversions.i \
1041 shlib-versions.v shlib-versions.v.i
1043 before-compile += $(common-objpfx)libc-modules.h
1044 ifeq ($(soversions.mk-done),t)
1045 # Generate a header with macro definitions for use with the IS_IN macro.
1046 # These are the possible values for the MODULE_NAME macro defined when building
1047 # sources, to identify which module the translation unit is going to be built
1049 $(common-objpfx)libc-modules.h: $(common-objpfx)libc-modules.stmp; @:
1050 $(common-objpfx)libc-modules.stmp: $(..)scripts/gen-libc-modules.awk \
1051 $(common-objpfx)soversions.i
1052 $(AWK) -v buildlist="$(subst -,_,$(built-modules))" -f $^ > ${@:stmp=T}
1053 $(move-if-change) ${@:stmp=T} ${@:stmp=h}
1058 common-generated += libc-modules.h libc-modules.stmp
1060 # The name under which the run-time dynamic linker is installed.
1061 # We are currently going for the convention that `/lib/ld.so.1'
1062 # names the SVR4/ELF ABI-compliant dynamic linker.
1063 ifndef rtld-installed-name
1065 rtld-installed-name = $(ld.so-version)
1067 rtld-installed-name = ld.so.1
1071 ifndef rtld-version-installed-name
1072 rtld-version-installed-name = ld-$(version).so
1075 endif # build-shared
1078 ifeq ($(build-shared),yes)
1079 libdl = $(common-objpfx)dlfcn/libdl.so$(libdl.so-version)
1081 libdl = $(common-objpfx)dlfcn/libdl.a
1084 ifeq ($(build-shared),yes)
1085 libm = $(common-objpfx)math/libm.so$(libm.so-version)
1086 libmvec = $(common-objpfx)mathvec/libmvec.so$(libmvec.so-version)
1088 libm = $(common-objpfx)math/libm.a
1089 libmvec = $(common-objpfx)mathvec/libmvec.a
1092 # These are the subdirectories containing the library source. The order
1093 # is more or less arbitrary. The sorting step will take care of the
1095 all-subdirs = csu assert ctype locale intl catgets math setjmp signal \
1096 stdlib stdio-common libio malloc string wcsmbs time dirent \
1097 grp pwd posix io termios resource misc socket sysvipc gmon \
1098 gnulib iconv iconvdata wctype manual shadow gshadow po argp \
1099 crypt localedata timezone rt conform debug mathvec \
1100 $(add-on-subdirs) dlfcn elf
1102 ifndef avoid-generated
1103 # sysd-sorted itself will contain rules making the sysd-sorted target
1104 # depend on Depend files. But if you just added a Depend file to an
1105 # existing directory not in all-subdirs, then sysd-sorted needs to
1106 # be regenerated, so it depends on existing $(sorted-subdirs:=/Depend) files.
1107 all-Depend-files := $(wildcard $(sort \
1108 $(foreach dir,$(all-subdirs),\
1109 $(firstword $($(dir)-srcdir) \
1110 $(..)$(dir))/Depend) \
1111 $(sorted-subdirs:=/Depend)))
1112 $(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \
1113 $(common-objpfx)config.make $(..)Makeconfig \
1114 $(wildcard $(sysdirs:=/Subdirs)) \
1117 -v subdirs='$(all-subdirs)' \
1119 $(filter %/Subdirs %/Depend,$^) > $@-tmp
1121 $(all-Depend-files): ;
1124 # This gives partial TARGET:SOURCE pattern pairs to have rules
1125 # emitted into sysd-rules. A sysdeps Makeconfig fragment can
1126 # add its own special object file prefix to this list with e.g. foo-%:%
1127 # to have foo-*.? compiled from *.? using $(foo-CPPFLAGS).
1128 sysd-rules-patterns := %:% rtld-%:rtld-% rtld-%:% m_%:s_%
1130 # Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
1131 sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig))
1132 ifneq (,$(sysdep-makeconfigs))
1133 include $(sysdep-makeconfigs)
1136 # Compute just the target patterns. Makeconfig has set sysd-rules-patterns.
1137 sysd-rules-targets := $(sort $(foreach p,$(sysd-rules-patterns),\
1138 $(firstword $(subst :, ,$p))))
1140 # A sysdeps Makeconfig fragment may set libc-reentrant to yes.
1141 ifeq (yes,$(libc-reentrant))
1142 defines += -D_LIBC_REENTRANT
1144 libio-mtsafe = -D_IO_MTSAFE_IO
1147 # The name to give to a test in test results summaries.
1148 test-name = $(strip $(patsubst %.out, %, $(patsubst $(common-objpfx)%, %, $@)))
1150 # Likewise, in XFAIL variable names.
1151 test-xfail-name = $(strip $(patsubst %.out, %, $(patsubst $(objpfx)%, %, $@)))
1153 # Command to output a test status line (such as PASS: test-name). If
1154 # test-xfail-$(test-xfail-name) has a nonempty value, the status will be
1155 # XPASS or XFAIL rather than PASS or FAIL.
1156 evaluate-test = $(..)scripts/evaluate-test.sh $(test-name) $$? \
1157 $(if $(test-xfail-$(test-xfail-name)),true,false) \
1158 $(if $(stop-on-test-failure),true,false) \
1159 > $(common-objpfx)$(test-name).test-result
1161 endif # Makeconfig not yet included