1 # Copyright (C) 1991-2023 Free Software Foundation, Inc.
2 # Copyright The GNU Toolchain Authors.
3 # This file is part of the GNU C Library.
5 # The GNU C Library is free software; you can redistribute it and/or
6 # modify it under the terms of the GNU Lesser General Public
7 # License as published by the Free Software Foundation; either
8 # version 2.1 of the License, or (at your option) any later version.
10 # The GNU C Library is distributed in the hope that it will be useful,
11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 # Lesser General Public License for more details.
15 # You should have received a copy of the GNU Lesser General Public
16 # License along with the GNU C Library; if not, see
17 # <https://www.gnu.org/licenses/>.
20 # Makefile configuration options for the GNU C library.
23 This makefile requires GNU Make.
26 all: # Make this the default goal
28 ifneq "$(origin +included-Makeconfig)" "file"
30 +included-Makeconfig := yes
36 # $(common-objdir) is the place to put objects and
37 # such that are not specific to a single subdir.
39 objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/)
40 common-objpfx = $(objdir)/
41 common-objdir = $(objdir)
43 $(error objdir must be defined by the build-directory Makefile)
46 # Did we request 'make -s' run? "yes" or "no".
47 # Starting from make-4.4 MAKEFLAGS now contains long
48 # options like '--shuffle'. To detect presence of 's'
49 # we pick first word with short options. Long options
50 # are guaranteed to come after whitespace. We use '-'
51 # prefix to always have a word before long options
52 # even if no short options were passed.
53 # Typical MAKEFLAGS values to watch for:
54 # "rs --shuffle=42" (silent)
55 # " --shuffle" (not silent)
56 ifeq ($(findstring s, $(firstword -$(MAKEFLAGS))),)
62 # Root of the sysdeps tree.
63 sysdep_dir := $(..)sysdeps
64 export sysdep_dir := $(sysdep_dir)
66 # Get the values defined by options to `configure'.
67 include $(common-objpfx)config.make
69 # What flags to give to sources which call user provided callbacks
70 uses-callbacks = -fexceptions
72 # What flags to give to tests which test stack alignment
73 stack-align-test-flags =
75 # Complete path to sysdep dirs.
76 # `configure' writes a definition of `config-sysdirs' in `config.make'.
77 sysdirs := $(foreach D,$(config-sysdirs),$(firstword $(filter /%,$D) $(..)$D))
79 +sysdep_dirs = $(sysdirs)
81 +sysdep_dirs := $(objdir) $(+sysdep_dirs)
84 # Run config.status to update config.make and config.h. We don't show the
85 # dependence of config.h to Make, because it is only touched when it
86 # changes and so config.status would be run every time; the dependence of
87 # config.make should suffice to force regeneration and re-exec, and the new
88 # image will notice if config.h changed.
89 $(common-objpfx)config.make: $(common-objpfx)config.status \
90 $(..)config.make.in $(..)config.h.in
91 cd $(<D); $(SHELL) $(<F)
93 # Find all the sysdeps configure fragments, to make sure we re-run
94 # configure when any of them changes.
95 $(common-objpfx)config.status: $(..)version.h $(..)configure \
96 $(foreach dir,$(sysdirs),\
97 $(wildcard $(dir)/Implies) \
99 $(firstword $(wildcard \
100 $(addprefix $(dir)/,configure configure.ac))))) \
102 $(wildcard $(..)sysdeps/*/preconfigure $(..)sysdeps/*/preconfigure.ac))
103 @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
104 echo The GNU C library has not been configured. >&2; \
105 echo Run \`configure\' to configure it before building. >&2; \
106 echo Try \`configure --help\' for more details. >&2; \
109 # We don't want CPPFLAGS to be exported to the command running configure.
112 # Get the user's configuration parameters.
113 ifneq ($(wildcard $(..)configparms),)
114 include $(..)configparms
117 ifneq ($(wildcard $(common-objpfx)configparms),)
118 include $(common-objpfx)configparms
123 #### These are the configuration variables. You can define values for
124 #### the variables below in the file `configparms'.
125 #### Do NOT edit this file.
129 # Common prefix for machine-independent installation directories.
130 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
134 # Decide whether we shall build the programs or not. We always do this
135 # unless the user tells us (in configparms) or we are building for a
137 ifndef build-programs
138 ifneq ($(config-os),none)
145 # Common prefix for machine-dependent installation directories.
146 ifeq ($(origin exec_prefix),undefined)
147 exec_prefix = $(prefix)
150 # Where to install the library and object files.
152 libdir = $(exec_prefix)/lib
154 inst_libdir = $(install_root)$(libdir)
156 # Where to install the shared library.
158 slibdir = $(exec_prefix)/lib
160 inst_slibdir = $(install_root)$(slibdir)
162 # Where to install the dynamic linker.
166 inst_rtlddir = $(install_root)$(rtlddir)
168 # Prefix to put on files installed in $(libdir). For libraries `libNAME.a',
169 # the prefix is spliced between `lib' and the name, so the linker switch
170 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
171 # just prepended to the whole file name.
172 ifeq ($(origin libprefix),undefined)
176 # Where to install the header files.
178 includedir = $(prefix)/include
180 inst_includedir = $(install_root)$(includedir)
182 # Where to install machine-independent data files.
183 # These are the timezone database, and the locale database.
185 datadir = $(prefix)/share
187 inst_datadir = $(install_root)$(datadir)
189 # Where to install the timezone data files (which are machine-independent).
191 zonedir = $(datadir)/zoneinfo
193 inst_zonedir = $(install_root)$(zonedir)
195 # Where to install the compiled binary locale archive and compiled
196 # binary locale files.
198 complocaledir = $(libdir)/locale
200 inst_complocaledir = $(install_root)$(complocaledir)
202 # Where to install the message catalog data files (which are
203 # machine-independent).
205 localedir = $(datadir)/locale
207 inst_localedir = $(install_root)$(localedir)
209 # Where to install the locale charmap source files.
211 i18ndir = $(datadir)/i18n
213 inst_i18ndir = $(install_root)$(i18ndir)
215 # Where to install the shared object for charset transformation.
217 gconvdir = $(libdir)/gconv
219 inst_gconvdir = $(install_root)$(gconvdir)
221 # Where to install programs.
223 bindir = $(exec_prefix)/bin
225 inst_bindir = $(install_root)$(bindir)
227 # Where to install internal programs.
229 libexecdir = $(exec_prefix)/libexec
231 inst_libexecdir = $(install_root)$(libexecdir)
233 # Where to install administrative programs.
235 rootsbindir = $(exec_prefix)/sbin
237 inst_rootsbindir = $(install_root)$(rootsbindir)
240 sbindir = $(exec_prefix)/sbin
242 inst_sbindir = $(install_root)$(sbindir)
244 # Where to install the Info files.
246 infodir = $(prefix)/info
248 inst_infodir = $(install_root)$(infodir)
250 # Where to install audit libraries.
252 auditdir = $(libdir)/audit
254 inst_auditdir = $(install_root)$(auditdir)
256 # Where to install default configuration files. These include the local
257 # timezone specification and network data base files.
259 sysconfdir = $(prefix)/etc
261 inst_sysconfdir = $(install_root)$(sysconfdir)
263 # Directory for the database files and Makefile for nss_db.
265 vardbdir = $(localstatedir)/db
267 inst_vardbdir = $(install_root)$(vardbdir)
269 # Where to install the "localtime" timezone file; this is the file whose
270 # contents $(localtime) specifies. If this is a relative pathname, it is
271 # relative to $(zonedir). It is a good idea to put this somewhere
272 # other than there, so the zoneinfo directory contains only universal data,
273 # localizing the configuration data elsewhere.
274 ifndef localtime-file
275 localtime-file = $(sysconfdir)/localtime
278 # What to use for leap second specifications in compiling the default
279 # timezone files. Set this to `/dev/null' for no leap second handling as
280 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
281 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
282 # This variable determines the default: if it's `/dev/null',
283 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
285 leapseconds = /dev/null
288 # What timezone's DST rules should be used when a POSIX-style TZ
289 # environment variable doesn't specify any rules. For 1003.1 compliance
290 # this timezone must use rules that are as U.S. federal law defines DST.
291 # Run `make -C time echo-zonenames' to see a list of available zone names.
292 # This setting can be changed with `zic -p TIMEZONE' at any time.
293 # If you want POSIX.1 compatibility, use `America/New_York'.
295 posixrules = America/New_York
298 # Where to install the "posixrules" timezone file; this is file
299 # whose contents $(posixrules) specifies. If this is a relative
300 # pathname, it is relative to $(zonedir).
301 ifndef posixrules-file
302 posixrules-file = posixrules
306 # Directory where your system's native header files live.
307 # This is used on Unix systems to generate some GNU libc header files.
309 sysincludedir = /usr/include
313 # Commands to install files.
315 INSTALL_DATA = $(INSTALL) -m 644
317 ifndef INSTALL_SCRIPT
318 INSTALL_SCRIPT = $(INSTALL)
320 ifndef INSTALL_PROGRAM
321 INSTALL_PROGRAM = $(INSTALL)
328 # The name of the C compiler.
329 # If you've got GCC, and it works, use it.
330 ifeq ($(origin CC),default)
334 # The name of the C compiler to use for compilations of programs to run on
335 # the host that is building the library. If you set CC to a
336 # cross-compiler, you must set this to the normal compiler.
341 # Default flags to pass the C compiler.
342 ifndef default_cflags
343 ifeq ($(release),stable)
344 default_cflags := -g -O2
346 default_cflags := -g -O
350 # Flags to pass the C compiler when assembling preprocessed assembly code
356 # Must be supported by the linker.
357 no-whole-archive = -Wl,--no-whole-archive
358 whole-archive = -Wl,--whole-archive
360 # Installed name of the startup code.
361 # The ELF convention is that the startfile is called crt1.o
362 start-installed-name = crt1.o
363 # On systems that do not need a special startfile for statically linked
364 # binaries, simply set it to the normal name.
365 ifndef static-start-installed-name
366 static-start-installed-name = $(start-installed-name)
369 ifeq (yes,$(enable-static-pie))
370 # Link with rcrt1.o, instead of crt1.o, to call _dl_relocate_static_pie
371 # to relocate static PIE.
372 real-static-start-installed-name = r$(static-start-installed-name)
374 real-static-start-installed-name = $(static-start-installed-name)
377 relro-LDFLAGS = -Wl,-z,relro
378 LDFLAGS.so += $(relro-LDFLAGS)
379 LDFLAGS-rtld += $(relro-LDFLAGS)
381 # Linker options to enable and disable DT_RELR.
382 ifeq ($(have-dt-relr),yes)
383 dt-relr-ldflag = -Wl,-z,pack-relative-relocs
384 no-dt-relr-ldflag = -Wl,-z,nopack-relative-relocs
390 ifeq (no,$(build-pie-default))
391 pie-default = $(no-pie-ccflag)
392 else # build-pie-default
394 # Compile libc.a and libc_p.a with -fPIE/-fpie for static PIE.
395 pie-default = $(pie-ccflag)
397 ifeq (yes,$(enable-static-pie))
398 static-pie-dt-relr-ldflag = $(dt-relr-ldflag)
399 ifeq (yes,$(have-static-pie))
400 static-pie-ldflag = -static-pie
402 # Static PIE can't have dynamic relocations in read-only segments since
403 # static PIE is mapped into memory by kernel. --eh-frame-hdr is needed
404 # for PIE to support exception.
405 static-pie-ldflag = -Wl,-pie,--no-dynamic-linker,--eh-frame-hdr,-z,text
406 endif # have-static-pie
407 endif # enable-static-pie
408 endif # build-pie-default
410 # If lazy relocations are disabled, add the -z now flag. Use
411 # LDFLAGS-lib.so instead of LDFLAGS.so, to avoid adding the flag to
413 ifeq ($(bind-now),yes)
414 LDFLAGS-lib.so += -Wl,-z,now
415 # Extra flags for dynamically linked non-test main programs.
416 link-extra-flags += -Wl,-z,now
419 # Command to run after every final link (executable or shared object).
420 # This is invoked with $(call after-link,...), so it should operate on
421 # the file $1. This can be set to do some sort of post-processing on
422 # binaries, or to perform some sort of static sanity check.
427 # Additional libraries to link into every test.
428 link-extra-libs-tests = $(libsupport)
430 # Command for linking PIE programs with the C library.
432 +link-pie-before-inputs = $(if $($(@F)-no-pie),$(no-pie-ldflag),-pie) \
433 $(if $($(@F)-no-dt-relr),$(no-dt-relr-ldflag),$(dt-relr-ldflag)) \
434 -Wl,-O1 -nostdlib -nostartfiles \
435 $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
436 $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
437 $(firstword $(CRT-$(@F)) $(csu-objpfx)S$(start-installed-name)) \
438 $(+preinit) $(+prectorS)
439 +link-pie-before-libc = -o $@ $(+link-pie-before-inputs) \
440 $(filter-out $(addprefix $(csu-objpfx),start.o \
441 S$(start-installed-name))\
442 $(+preinit) $(link-extra-libs) \
443 $(common-objpfx)libc% $(+postinit),$^) \
445 +link-pie-after-libc = $(+postctorS) $(+postinit)
447 $(CC) $(link-libc-rpath-link) $(+link-pie-before-libc) $(rtld-LDFLAGS) \
448 $(link-extra-flags) $(link-libc) $(+link-pie-after-libc)
449 $(call after-link,$@)
451 define +link-pie-tests
452 $(CC) $(+link-pie-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
453 $(+link-pie-after-libc)
454 $(call after-link,$@)
456 define +link-pie-printers-tests
457 $(CC) $(+link-pie-before-libc) $(built-rtld-LDFLAGS) \
458 $(link-libc-printers-tests) $(+link-pie-after-libc)
459 $(call after-link,$@)
462 # Command for statically linking programs with the C library.
464 +link-static-before-inputs = -nostdlib -nostartfiles -static \
465 $(if $($(@F)-no-pie),$(no-pie-ldflag),$(static-pie-ldflag)) \
466 $(if $($(@F)-no-dt-relr),$(no-dt-relr-ldflag),$(static-pie-dt-relr-ldflag)) \
467 $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
468 $(firstword $(CRT-$(@F)) $(csu-objpfx)$(real-static-start-installed-name)) \
469 $(+preinit) $(+prectorT)
470 +link-static-before-libc = -o $@ $(+link-static-before-inputs) \
471 $(filter-out $(addprefix $(csu-objpfx),start.o \
472 $(start-installed-name))\
473 $(+preinit) $(link-extra-libs-static) \
474 $(common-objpfx)libc% $(+postinit),$^) \
475 $(link-extra-libs-static)
476 +link-static-after-libc = $(+postctorT) $(+postinit)
478 $(CC) $(+link-static-before-libc) $(link-extra-flags) $(link-libc-static) \
479 $(+link-static-after-libc)
480 $(call after-link,$@)
482 define +link-static-tests
483 $(CC) $(+link-static-before-libc) $(link-libc-static-tests) \
484 $(+link-static-after-libc)
485 $(call after-link,$@)
488 # Commands for linking programs with the C library.
490 ifeq (yes,$(build-shared))
491 ifeq (yes,$(cc-pie-default))
492 no-pie-ldflag = -no-pie
494 ifeq (yes,$(build-pie-default))
496 +link-tests = $(+link-pie-tests)
497 +link-tests-before-inputs = $(+link-pie-before-inputs) $(rtld-tests-LDFLAGS)
498 +link-tests-after-inputs = $(link-libc-tests) $(+link-pie-after-libc)
499 +link-printers-tests = $(+link-pie-printers-tests)
500 else # not build-pie-default
501 +link-before-inputs = -nostdlib -nostartfiles $(no-pie-ldflag) \
502 $(sysdep-LDFLAGS) $(LDFLAGS) $(LDFLAGS-$(@F)) \
503 $(relro-LDFLAGS) $(hashstyle-LDFLAGS) \
504 $(firstword $(CRT-$(@F)) $(csu-objpfx)$(start-installed-name)) \
505 $(+preinit) $(+prector)
506 +link-before-libc = -o $@ $(+link-before-inputs) \
507 $(filter-out $(addprefix $(csu-objpfx),start.o \
508 $(start-installed-name))\
509 $(+preinit) $(link-extra-libs) \
510 $(common-objpfx)libc% $(+postinit),$^) \
512 +link-after-libc = $(+postctor) $(+postinit)
514 $(CC) $(link-libc-rpath-link) $(+link-before-libc) $(rtld-LDFLAGS) \
515 $(link-extra-flags) $(link-libc) $(+link-after-libc)
516 $(call after-link,$@)
518 +link-tests-before-inputs = $(+link-before-inputs) $(rtld-tests-LDFLAGS)
519 +link-tests-after-inputs = $(link-libc-tests) $(+link-after-libc)
521 $(CC) $(+link-before-libc) $(rtld-tests-LDFLAGS) $(link-libc-tests) \
523 $(call after-link,$@)
525 define +link-printers-tests
526 $(CC) $(+link-before-libc) $(built-rtld-LDFLAGS) $(link-libc-printers-tests) \
528 $(call after-link,$@)
530 endif # build-pie-default
532 +link = $(+link-static)
533 +link-tests = $(+link-static-tests)
534 +link-tests-before-inputs = $(+link-static-before-inputs)
535 +link-tests-after-inputs = $(link-libc-static-tests) $(+link-static-after-libc)
536 +link-printers-tests = $(+link-static-tests)
540 # The pretty printer test programs need to be compiled without optimizations
541 # so they won't confuse gdb. We could use either the 'GCC optimize' pragma
542 # or the 'optimize' function attribute to achieve this; however, at least on
543 # ARM, gcc always produces different debugging symbols when invoked with
544 # a -O greater than 0 than when invoked with -O0, regardless of anything else
545 # we're using to suppress optimizations. Therefore, we need to explicitly pass
546 # -O0 to it through CFLAGS. As a result, any fortification needs to be disabled
547 # as it needs -O greater than 0.
548 # Additionally, the build system will try to -include $(common-objpfx)/config.h
549 # when compiling the tests, which will throw an error if some special macros
550 # (such as __OPTIMIZE__ and IS_IN_build) aren't defined. To avoid this, we
551 # tell gcc to define IS_IN_build.
552 CFLAGS-printers-tests := -O0 -ggdb3 -DIS_IN_build $(no-fortify-source)
554 ifeq (yes,$(build-shared))
555 # These indicate whether to link using the built ld.so or the installed one.
556 installed-rtld-LDFLAGS = -Wl,-dynamic-linker=$(rtlddir)/$(rtld-installed-name)
557 built-rtld-LDFLAGS = -Wl,-dynamic-linker=$(elf-objpfx)ld.so
560 rtld-LDFLAGS = $(installed-rtld-LDFLAGS)
563 ifndef rtld-tests-LDFLAGS
564 ifeq (yes,$(build-hardcoded-path-in-tests))
565 rtld-tests-LDFLAGS = $(built-rtld-LDFLAGS)
567 rtld-tests-LDFLAGS = $(installed-rtld-LDFLAGS)
568 endif # build-hardcoded-path-in-tests
569 endif # rtld-tests-LDFLAGS
574 ifeq (yes,$(build-shared))
575 # We need the versioned name of libc.so in the deps of $(others) et al
576 # so that the symlink to libc.so is created before anything tries to
577 # run the linked programs.
578 link-libc-rpath = -Wl,-rpath=$(rpath-link)
579 link-libc-rpath-link = -Wl,-rpath-link=$(rpath-link)
581 # For programs which are not tests, $(link-libc-rpath-link) is added
582 # directly in $(+link), $(+link-pie) above, so that -Wl,-rpath-link
583 # comes before the expansion of LDLIBS-* and affects libraries added
584 # there. For shared objects, -Wl,-rpath-link is added via
585 # $(build-shlib-helper) and $(build-module-helper) in Makerules (also
586 # before the expansion of LDLIBS-* variables).
588 # Tests use -Wl,-rpath instead of -Wl,-rpath-link for
589 # build-hardcoded-path-in-tests.
590 ifeq (yes,$(build-hardcoded-path-in-tests))
591 link-libc-tests-rpath-link = $(link-libc-rpath)
592 link-test-modules-rpath-link = $(link-libc-rpath)
594 link-libc-tests-rpath-link = $(link-libc-rpath-link)
595 link-test-modules-rpath-link =
596 endif # build-hardcoded-path-in-tests
598 link-libc-between-gnulib = $(common-objpfx)libc.so$(libc.so-version) \
599 $(common-objpfx)$(patsubst %,$(libtype.oS),c) \
600 -Wl,--as-needed $(elf-objpfx)ld.so \
602 link-libc = $(link-libc-between-gnulib) $(gnulib)
604 link-libc-tests-after-rpath-link = $(gnulib-tests) $(link-libc-between-gnulib) $(gnulib-tests)
605 link-libc-tests = $(link-libc-tests-rpath-link) \
606 $(link-libc-tests-after-rpath-link)
607 # Pretty printer test programs always require rpath instead of rpath-link.
608 link-libc-printers-tests = $(link-libc-rpath) \
609 $(link-libc-tests-after-rpath-link)
611 # This is how to find at build-time things that will be installed there.
612 rpath-dirs = math elf dlfcn nss nis rt resolv mathvec support
614 $(common-objdir):$(subst $(empty) ,:,$(patsubst ../$(subdir),.,$(rpath-dirs:%=$(common-objpfx)%)))
616 link-libc = $(common-objpfx)libc.a $(otherlibs) $(gnulib) $(common-objpfx)libc.a $(gnulib)
617 link-libc-tests = $(common-objpfx)libc.a $(otherlibs) $(gnulib-tests) $(common-objpfx)libc.a $(gnulib-tests)
621 # Differences in the linkers on the various platforms.
622 LDFLAGS-rpath-ORIGIN = -Wl,-rpath,'$$ORIGIN'
623 LDFLAGS-soname-fname = -Wl,-soname,$(@F)
624 LDFLAGS-rdynamic = -rdynamic
625 LDFLAGS-Bsymbolic = -Bsymbolic
627 # Choose the default search path for the dynamic linker based on
628 # where we will install libraries.
629 ifneq ($(libdir),$(slibdir))
630 default-rpath = $(slibdir):$(libdir)
632 default-rpath = $(libdir)
635 ifndef link-extra-libs
636 link-extra-libs = $(LDLIBS-$(@F))
637 link-extra-libs-static = $(link-extra-libs)
640 # The static libraries.
641 link-libc-static = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib) -Wl,--end-group
642 link-libc-static-tests = -Wl,--start-group $(common-objpfx)libc.a $(static-gnulib-tests) -Wl,--end-group
644 # How to link against libgcc. Some libgcc functions, such as those
645 # for "long long" arithmetic or software floating point, can always be
646 # built without use of C library headers and do not have any global
647 # state so can safely be linked statically into any executable or
648 # shared library requiring them; these functions are in libgcc.a.
649 # Other functions, relating to exception handling, may require C
650 # library headers to build and it may not be safe to have more than
651 # one copy of them in a process; these functions are only in
652 # libgcc_s.so and libgcc_eh.a.
654 # To avoid circular dependencies when bootstrapping, it is desirable
655 # to avoid use of libgcc_s and libgcc_eh in building glibc. Where any
656 # glibc functionality (in particular, thread cancellation) requires
657 # exception handling, this is implemented through dlopen of libgcc_s
658 # to avoid unnecessary dependencies on libgcc_s by programs not using
659 # that functionality; executables built with glibc do not use
660 # exception handling other than through thread cancellation.
662 # Undefined references to functions from libgcc_eh or libgcc_s may
663 # arise for code built with -fexceptions. In the case of statically
664 # linked programs installed by glibc, unwinding will never actually
665 # occur at runtime and the use of elf/static-stubs.c to resolve these
666 # references is safe. In the case of statically linked test programs
667 # and test programs built with -fexceptions, unwinding may occur in
668 # some cases and it is preferable to link with libgcc_eh or libgcc_s
669 # so that the testing is as similar as possible to how programs will
670 # be built with the installed glibc.
672 # Some architectures have architecture-specific systems for exception
673 # handling that may involve undefined references to
674 # architecture-specific functions. On those architectures,
675 # gnulib-arch and static-gnulib-arch may be defined in sysdeps
676 # makefiles to use additional libraries for linking executables and
677 # shared libraries built by glibc.
679 ifneq ($(have-cc-with-libunwind),yes)
684 libgcc_eh := -Wl,--as-needed -lgcc_s $(libunwind) -Wl,--no-as-needed
686 gnulib = -lgcc $(gnulib-arch)
687 gnulib-tests := -lgcc $(libgcc_eh)
689 # By default, elf/static-stubs.o, instead of -lgcc_eh, is used to
690 # statically link programs. When --disable-shared is used, we use
691 # -lgcc_eh since elf/static-stubs.o isn't sufficient.
692 ifeq (yes,$(build-shared))
693 static-gnulib = -lgcc $(static-gnulib-arch)
695 static-gnulib = -lgcc -lgcc_eh $(static-gnulib-arch)
697 static-gnulib-tests := -lgcc -lgcc_eh $(libunwind)
698 libc.so-gnulib := -lgcc
700 +preinit = $(addprefix $(csu-objpfx),crti.o)
701 +postinit = $(addprefix $(csu-objpfx),crtn.o)
702 +prector = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbegin.o`
703 +postctor = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
704 # Variants of the two previous definitions for linking PIE programs.
705 +prectorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginS.o`
706 +postctorS = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtendS.o`
707 # Variants of the two previous definitions for statically linking programs.
708 ifeq (yes,$(enable-static-pie))
709 # Static PIE must use PIE variants.
710 +prectorT = $(+prectorS)
711 +postctorT = $(+postctorS)
713 +prectorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtbeginT.o`
714 +postctorT = `$(CC) $(sysdep-LDFLAGS) --print-file-name=crtend.o`
716 csu-objpfx = $(common-objpfx)csu/
717 elf-objpfx = $(common-objpfx)elf/
719 # A command that, prepended to the name and arguments of a program,
720 # and run on the build system, causes that program with those
721 # arguments to be run on the host for which the library is built.
725 # Likewise, but the name of the program is preceded by
726 # <variable>=<value> assignments for environment variables.
727 ifndef test-wrapper-env
728 test-wrapper-env = $(test-wrapper) env
730 # Likewise, but the program's environment will be empty except for any
731 # explicit <variable>=<value> assignments preceding the program name.
732 ifndef test-wrapper-env-only
733 test-wrapper-env-only = $(test-wrapper) env -i
736 # Whether to run test programs built for the library's host system.
737 ifndef run-built-tests
738 ifeq (yes|,$(cross-compiling)|$(test-wrapper))
741 run-built-tests = yes
745 # Whether to stop immediately when a test fails. Nonempty means to
746 # stop, empty means not to stop.
747 ifndef stop-on-test-failure
748 stop-on-test-failure =
751 # How to run a program we just linked with our library.
752 # The program binary is assumed to be $(word 2,$^).
753 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
754 rtld-prefix = $(elf-objpfx)$(rtld-installed-name) \
756 $(rpath-link)$(patsubst %,:%,$(sysdep-library-path))
757 ifeq (yes,$(build-shared))
759 sysdep-library-path = \
760 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
761 $(filter -Wl$(comma)-rpath-link=%,\
762 $(sysdep-LDFLAGS)))))
763 # $(run-via-rtld-prefix) is a command that, when prepended to the name
764 # of a program built with the newly built library, produces a command
765 # that, executed on the host for which the library is built, runs that
766 # program. For tests listed in tests-static or xtests-static, it is
768 run-via-rtld-prefix = \
769 $(if $(strip $(filter $(notdir $(built-program-file)), \
770 $(tests-static) $(xtests-static))),, $(rtld-prefix))
772 run-via-rtld-prefix =
774 # $(run-program-env) is the default environment variable settings to
775 # use when running a program built with the newly built library.
776 run-program-env = GCONV_PATH=$(common-objpfx)iconvdata \
777 LOCPATH=$(common-objpfx)localedata LC_ALL=C
778 # $(run-program-prefix) is a command that, when prepended to the name
779 # of a program built with the newly built library, produces a command
780 # that, executed on the build system on which "make" is run, runs that
781 # program. $(run-program-prefix-before-env) and
782 # $(run-program-prefix-after-env) are similar, but separate parts
783 # before and after a list of environment variables.
784 run-program-prefix-before-env = $(test-wrapper-env)
785 run-program-prefix-after-env = $(run-via-rtld-prefix)
786 run-program-prefix = $(run-program-prefix-before-env) $(run-program-env) \
787 $(run-program-prefix-after-env)
788 # $(built-program-cmd) is a command that, executed on the build system
789 # on which "make" is run, runs the newly built program that is the
790 # second dependency of the makefile target in which
791 # $(built-program-cmd) is used. $(built-program-cmd-before-env) and
792 # $(built-program-cmd-after-env) are similar, before and after a list
793 # of environment variables.
794 built-program-cmd-before-env = $(test-wrapper-env)
795 built-program-cmd-after-env = $(run-via-rtld-prefix) $(built-program-file)
796 built-program-cmd = $(built-program-cmd-before-env) $(run-program-env) \
797 $(built-program-cmd-after-env)
798 # $(host-built-program-cmd) is a command that, executed on the host
799 # for which the library is built, runs the newly built program that is
800 # the second dependency of the makefile target in which
801 # $(host-built-program-cmd) is used.
802 host-built-program-cmd = $(run-via-rtld-prefix) $(built-program-file)
803 # $(ld-library-path) is the common content to be set in LD_LIBRARY_PATH
804 # for running static binaries that may load dynamic objects.
805 ld-library-path = $(objpfx):$(common-objpfx)$(addprefix :,$(sysdep-ld-library-path))
811 # $(test-via-rtld-prefix) is a command that, when prepended to the name
812 # of a test program built with the newly built library, produces a command
813 # that, executed on the host for which the library is built, runs that
814 # program. For tests listed in tests-static or xtests-static as well
815 # as when test programs are hardcoded to the newly built libraries, it
818 # $(test-program-prefix) is a command that, when prepended to the name
819 # of a test program built with the newly built library, produces a command
820 # that, executed on the build system on which "make" is run, runs that
821 # test program. $(test-program-prefix-before-env) and
822 # $(test-program-prefix-after-env) are similar, before and after a
823 # list of environment variables.
825 # $(test-program-cmd) is a command that, executed on the build system
826 # on which "make" is run, runs the newly built test program that is the
827 # second dependency of the makefile target in which
828 # $(test-program-cmd) is used. $(test-program-cmd-before-env) and
829 # $(test-program-cmd-after-env) are similar, before and after a list
830 # of environment variables.
832 # $(host-test-program-cmd) is a command that, executed on the host
833 # for which the library is built, runs the newly built test program that
834 # is the second dependency of the makefile target in which
835 # $(host-test-program-cmd) is used.
837 ifeq (yes,$(build-hardcoded-path-in-tests))
838 test-via-rtld-prefix =
839 test-program-prefix-before-env = $(test-wrapper-env)
840 test-program-prefix-after-env =
841 test-program-prefix = $(test-program-prefix-before-env) $(run-program-env) \
842 $(test-program-prefix-after-env)
843 test-program-cmd-before-env = $(test-wrapper-env)
844 test-program-cmd-after-env = $(built-program-file)
845 test-program-cmd = $(test-program-cmd-before-env) $(run-program-env) \
846 $(test-program-cmd-after-env)
847 host-test-program-cmd = $(built-program-file)
849 test-via-rtld-prefix = $(run-via-rtld-prefix)
850 test-program-prefix-before-env = $(run-program-prefix-before-env)
851 test-program-prefix-after-env = $(run-program-prefix-after-env)
852 test-program-prefix = $(run-program-prefix)
853 test-program-cmd-before-env = $(built-program-cmd-before-env)
854 test-program-cmd-after-env = $(built-program-cmd-after-env)
855 test-program-cmd = $(built-program-cmd)
856 host-test-program-cmd = $(host-built-program-cmd)
859 # Extra flags to pass to GCC.
860 ifeq ($(all-warnings),yes)
861 +gccwarn := -Wall -Wwrite-strings -Wcast-qual -Wbad-function-cast -Wmissing-noreturn -Wmissing-prototypes -Wmissing-declarations -Wcomment -Wcomments -Wtrigraphs -Wsign-compare -Wfloat-equal -Wmultichar
863 +gccwarn := -Wall -Wwrite-strings
866 ifeq ($(enable-werror),yes)
869 +gccwarn-c = -Wstrict-prototypes -Wold-style-definition
871 # We do not depend on the address of constants in different files to be
872 # actually different, so allow the compiler to merge them all.
873 +merge-constants = -fmerge-all-constants
875 # We have to assume that glibc functions are called in any rounding
876 # mode and also change the rounding mode in a few functions. So,
877 # disable any optimization that assume default rounding mode.
878 +math-flags = -frounding-math
880 # Logically only "libnldbl", "nonlib" and "testsuite" should be using
881 # -fno-math-errno. However due to GCC bug #88576, only "libm" can use
883 +extra-math-flags = $(if $(filter libm,$(in-module)),-fno-math-errno,-fmath-errno)
885 # Use 64 bit time_t support for installed programs
886 installed-modules = nonlib nscd ldconfig locale_programs \
887 iconvprogs libnss_files libnss_compat libnss_db libnss_hesiod \
888 libutil libpcprofile libnsl
889 +extra-time-flags = $(if $(filter $(installed-modules),\
890 $(in-module)),-D_TIME_BITS=64 -D_FILE_OFFSET_BITS=64)
892 # We might want to compile with some stack-protection flag.
893 ifneq ($(stack-protector),)
894 +stack-protector=$(stack-protector)
897 # Some routines are unsafe to build with stack-protection since they're called
898 # before the stack check guard is set up. Provide a way to disable stack
899 # protector. The first argument is the extension (.o, .os, .oS) and the second
900 # is a list of routines that this path should be applied to.
901 define elide-stack-protector
902 $(if $(filter $(@F),$(patsubst %,%$(1),$(2))), $(no-stack-protector))
905 # We might want to compile with fortify-source
906 ifneq ($(fortify-source),)
907 +fortify-source=$(fortify-source)
910 # Some routine can't be fortified like the ones used by fortify
911 define elide-fortify-source
912 $(if $(filter $(@F),$(patsubst %,%$(1),$(2))), $(no-fortify-source))
915 # The program that makes Emacs-style TAGS files.
918 # The `xgettext' program for producing .pot files from sources.
923 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
924 # perhaps others) to preprocess assembly code in some cases.
927 # To force installation of files even if they are older than the
928 # installed files. This variable is included in the dependency list
929 # of all installation targets.
930 ifeq ($(force-install),yes)
931 +force = force-install
937 #### End of configuration variables.
940 # This tells some versions of GNU make before 3.63 not to export all variables.
943 # We want to echo the commands we're running without
944 # umpteen zillion filenames along with it (we use `...' instead)
945 # but we don't want this echoing done when the user has said
946 # he doesn't want to see commands echoed by using -s.
947 ifeq ($(silent-make),yes) # if -s
948 +cmdecho := echo >/dev/null
953 # These are the flags given to the compiler to tell
954 # it what sort of optimization and/or debugging output to do.
956 # If `CFLAGS' was defined, use that.
958 +cflags := $(filter-out -I%,$(CFLAGS))
962 # If none of the above worked, default to "-g -O".
963 ifeq "$(strip $(+cflags))" ""
964 +cflags := $(default_cflags)
965 endif # $(+cflags) == ""
967 # Force building with -fno-common because hidden_def, compat_symbol
968 # and other constructs do not work for common symbols (and would
969 # otherwise require specifying __attribute__ ((nocommon)) on a
970 # case-by-case basis).
971 +cflags += $(cflags-cpu) $(+gccwarn) $(+merge-constants) $(+math-flags) \
972 $(+stack-protector) -fno-common
975 # We must filter out elf because the early bootstrap of the dynamic loader
976 # cannot be fortified. Likewise we exclude dlfcn because it is entangled
977 # with the loader. We must filter out csu because early startup, like the
978 # loader, cannot be fortified. Lastly debug is the fortification routines
979 # themselves and they cannot be fortified.
980 do-fortify = $(filter-out elf dlfcn csu debug,$(subdir))
981 ifeq ($(do-fortify),$(subdir))
982 +cflags += $(+fortify-source)
984 +cflags += $(no-fortify-source)
987 # Each sysdeps directory can contain header files that both will be
988 # used to compile and will be installed. Each can also contain an
989 # include/ subdirectory, whose header files will be used to compile
990 # but will not be installed, and will take precedence over the
991 # installed files. This mirrors the top-level include/ subdirectory.
992 +sysdep-includes := $(foreach dir,$(+sysdep_dirs),\
993 $(addprefix -I,$(wildcard $(dir)/include) $(dir)))
995 # These are flags given to the C compiler to tell it to look for
996 # include files (including ones given in angle brackets) in the parent
997 # library source directory, in the include directory, and in the
999 +includes = -I$(..)include $(if $(subdir),$(objpfx:%/=-I%)) \
1000 $(+sysdep-includes) $(includes) \
1001 $(patsubst %/,-I%,$(..)) $(libio-include) -I. $(sysincludes)
1003 # Since libio has several internal header files, we use a -I instead
1004 # of many little headers in the include directory.
1005 libio-include = -I$(..)libio
1007 # List of non-library modules that we build.
1008 built-modules = iconvprogs iconvdata ldconfig libmemusage \
1009 libpcprofile librpcsvc locale-programs \
1010 memusagestat nonlib nscd extramodules libnldbl libsupport \
1011 testsuite testsuite-internal
1013 in-module = $(subst -,_,$(firstword $(libof-$(basename $(@F))) \
1018 # Build ld.so, libc.so and libpthread.so with -ftls-model=initial-exec
1019 tls-model = $(if $(filter libpthread rtld \
1020 libc,$(in-module)),-ftls-model=initial-exec,)
1022 module-cppflags-real = -include $(common-objpfx)libc-modules.h \
1023 -DMODULE_NAME=$(in-module)
1025 # We don't need libc-modules.h and the MODULE_NAME definition for .v.i
1026 # files. These targets don't (and will likely never need to) use the IS_IN
1027 # facility. In fact, shlib-versions should not use it because that will
1028 # create a circular dependency as libc-modules.h is generated from
1030 module-cppflags = $(if $(filter %.mk.i %.v.i,$(@F)),,$(module-cppflags-real))
1032 # These are the variables that the implicit compilation rules use.
1033 # Note that we can't use -std=* in CPPFLAGS, because it overrides
1034 # the implicit -lang-asm and breaks cpp behavior for .S files--notably
1035 # it causes cpp to stop predefining __ASSEMBLER__.
1036 CPPFLAGS = $(config-extra-cppflags) $(CPPFLAGS-config) \
1037 $($(subdir)-CPPFLAGS) \
1038 $(+includes) $(defines) $(module-cppflags) \
1039 -include $(..)include/libc-symbols.h $(sysdep-CPPFLAGS) \
1040 $(CPPFLAGS-$(suffix $@)) \
1041 $(foreach lib,$(libof-$(basename $(@F))) \
1042 $(libof-$(<F)) $(libof-$(@F)),$(CPPFLAGS-$(lib))) \
1043 $(CPPFLAGS-$(<F)) $(CPPFLAGS-$(@F)) $(CPPFLAGS-$(basename $(@F))) \
1044 -DTOP_NAMESPACE=glibc
1046 override CFLAGS = -std=gnu11 -fgnu89-inline $(config-extra-cflags) \
1047 $(filter-out %frame-pointer,$(+cflags)) $(+gccwarn-c) \
1048 $(+extra-math-flags) $(+extra-time-flags) \
1049 $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) \
1050 $(CFLAGS-$(@F)) $(tls-model) \
1051 $(foreach lib,$(libof-$(basename $(@F))) \
1052 $(libof-$(<F)) $(libof-$(@F)),$(CFLAGS-$(lib)))
1053 # Use our copies of cstdlib and cmath.
1054 override CXXFLAGS = -I$(common-objpfx) $(c++-sysincludes) \
1055 $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
1056 $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
1058 # If everything is compiled with -fPIC (implicitly) we must tell this by
1059 # defining the PIC symbol.
1060 ifeq (yes,$(build-pic-default))
1064 # Enable object files for different versions of the library.
1065 # Various things use $(object-suffixes) to know what all to make.
1066 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
1067 # to pass different flags for each flavor.
1068 libtypes = $(foreach o,$(object-suffixes-for-libc),$(libtype$o))
1069 # .op may be added to all-object-suffixes below.
1070 all-object-suffixes := .o .os .oS
1072 CPPFLAGS-.o = $(pic-default)
1073 # libc.a must be compiled with -fPIE/-fpie for static PIE.
1074 CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) $(pie-default)
1075 CFLAGS-.o += $(call elide-fortify-source,.o,$(routines_no_fortify))
1076 CFLAGS-.o += $(call elide-fortify-source,_chk.o,$(routines_no_fortify))
1078 object-suffixes += .o
1079 ifeq (yes,$(build-shared))
1080 # Under --enable-shared, we will build a shared library of PIC objects.
1081 # The PIC object files are named foo.os.
1082 object-suffixes += .os
1083 pic-cppflags = -DPIC -DSHARED
1084 CPPFLAGS-.os = $(pic-cppflags)
1085 CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
1086 CFLAGS-.os += $(call elide-fortify-source,.os,$(routines_no_fortify))
1087 CFLAGS-.os += $(call elide-fortify-source,_chk.os,$(routines_no_fortify))
1088 libtype.os := lib%_pic.a
1089 # This can be changed by a sysdep makefile
1091 # This one should always stay like this unless there is a very good reason.
1094 # This can be changed by a sysdep makefile
1096 no-pie-ccflag = -fno-pie
1097 # This one should always stay like this unless there is a very good reason.
1099 ifeq (yes,$(build-profile))
1100 # Under --enable-profile, we will build a static library of profiled objects.
1101 # The profiled object files are named foo.op.
1102 all-object-suffixes += .op
1103 object-suffixes += .op
1104 CPPFLAGS-.op = -DPROF $(pic-default)
1105 # libc_p.a must be compiled with -fPIE/-fpie for static PIE.
1106 CFLAGS-.op = -pg $(pie-default)
1107 CFLAGS-.op += $(call elide-fortify-source,.op,$(routines_no_fortify))
1108 CFLAGS-.op += $(call elide-fortify-source,_chk.op,$(routines_no_fortify))
1109 libtype.op = lib%_p.a
1112 # Convenience variable for when we want to treat shared-library cases
1113 # differently from the rest.
1114 object-suffixes-noshared := $(filter-out .os,$(object-suffixes))
1116 object-suffixes-for-libc := $(object-suffixes)
1118 ifeq (yes,$(build-shared))
1119 # Build special library that contains the static-only routines for libc.
1120 object-suffixes-for-libc += .oS
1122 # Must build the routines as PIC, though, because they can end up in (users')
1123 # shared objects. We don't want to use CFLAGS-os because users may, for
1124 # example, make that processor-specific.
1125 CFLAGS-.oS = $(CFLAGS-.o) $(PIC-ccflag) $(extra-nonshared-cflags)
1126 CPPFLAGS-.oS = $(CPPFLAGS-.o) -DPIC -DLIBC_NONSHARED=1
1127 libtype.oS = lib%_nonshared.a
1130 # The assembler can generate debug information too.
1132 ASFLAGS := $(filter -g% -fdebug-prefix-map=%,$(CFLAGS))
1134 override ASFLAGS += -Werror=undef $(ASFLAGS-config) $(asflags-cpu)
1140 move-if-change = $(SHELL) $(..)scripts/move-if-change
1142 -include $(common-objpfx)sysd-sorted
1143 subdirs = $(sorted-subdirs)
1144 subdir-srcdirs = $(foreach dir,$(subdirs),\
1145 $(firstword $($(dir)-srcdir) $(..)$(dir)))
1147 # This is a pair of implicit rules to preprocess a file with # comments,
1148 # %ifdef et al, based on config.h settings or other %include'd files.
1149 # We use chained rules instead of a pipeline here so that we can properly
1150 # check the exit status of cpp rather than using its bad output when there
1151 # is a preprocessing error. Another rule should depend on the output file
1152 # `FOO.v', and along with that `FOO.v.i' should be given dependencies
1153 # listing both its input files, and any header files that it may reference
1154 # (but no commands).
1155 %.v.i: $(common-objpfx)config.h $(..)Makeconfig
1156 sed '/^[ ]*%/!s/#.*$$//;/^[ ]*$$/d;s/^[ ]*%/#/' \
1157 $(filter-out FORCE %.h $(..)Makeconfig,$^) \
1158 | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - \
1162 sed '/^[ ]*#/d;/^[ ]*$$/d' $< > $@T
1165 ifeq (yes, $(build-shared))
1167 # To generate a header to support more than one ABI for different
1168 # architecture variants, the CPU/Makefile defines abi-variants to be a
1169 # list of names for those variants (e.g. 32 64), and, for each variant,
1170 # defines abi-$(variant)-condition to be the condition for those options
1171 # to use in a C #if condition. abi-includes may be defined to a list of
1172 # headers to include in the generated header, if the default does not
1173 # suffice. default-abi is defined to be the ABI for the current glibc
1177 abi-includes := bits/wordsize.h
1180 # Process the shlib-versions file, which tells us what shared library
1181 # version numbers to use when we install shared objects on this system.
1182 # We need to wait until $(subdirs) is complete.
1183 ifeq ($(sysd-sorted-done),t)
1184 -include $(common-objpfx)soversions.mk
1185 ifndef avoid-generated
1186 $(common-objpfx)shlib-versions.v.i: \
1187 $(wildcard $(+sysdep_dirs:=/shlib-versions) \
1188 $(subdir-srcdirs:=/shlib-versions)) \
1191 $(common-objpfx)soversions.i: $(..)scripts/soversions.awk \
1192 $(common-objpfx)shlib-versions.v
1195 $(common-objpfx)soversions.mk: $(common-objpfx)soversions.i $(..)Makeconfig
1196 (while read which lib number setname; do \
1197 eval seen_$$which=1; \
1198 test x"$$which" = xDEFAULT || continue; \
1200 [0-9]*) echo "$$lib.so-version=.$$number"; \
1201 echo "all-sonames+=$$lib=$$lib.so\$$($$lib.so-version)";;\
1202 *) echo "$$lib.so-version=$$number"; \
1203 echo "all-sonames+=$$lib=\$$($$lib.so-version)";;\
1206 echo soversions.mk-done = t;) < $< > $@T; exit 0
1211 postclean-generated += soversions.mk soversions.i \
1212 shlib-versions.v shlib-versions.v.i
1214 before-compile += $(common-objpfx)libc-modules.h
1215 common-generated += libc-modules.h libc-modules.stmp
1216 ifeq ($(soversions.mk-done),t)
1217 # Generate a header with macro definitions for use with the IS_IN macro.
1218 # These are the possible values for the MODULE_NAME macro defined when building
1219 # sources, to identify which module the translation unit is going to be built
1221 $(common-objpfx)libc-modules.h: $(common-objpfx)libc-modules.stmp; @:
1222 $(common-objpfx)libc-modules.stmp: $(..)scripts/gen-libc-modules.awk \
1223 $(common-objpfx)soversions.i
1224 $(AWK) -v buildlist="$(subst -,_,$(built-modules))" -f $^ > ${@:stmp=T}
1225 $(move-if-change) ${@:stmp=T} ${@:stmp=h}
1230 # Build the tunables list header early since it could be used by any module in
1232 before-compile += $(common-objpfx)dl-tunable-list.h
1233 common-generated += dl-tunable-list.h dl-tunable-list.stmp
1235 $(common-objpfx)dl-tunable-list.h: $(common-objpfx)dl-tunable-list.stmp; @:
1236 $(common-objpfx)dl-tunable-list.stmp: \
1237 $(..)scripts/gen-tunables.awk \
1238 $(..)elf/dl-tunables.list \
1239 $(wildcard $(subdirs:%=$(..)%/dl-tunables.list)) \
1240 $(wildcard $(sysdirs:%=%/dl-tunables.list))
1241 $(AWK) -f $^ > ${@:stmp=T}
1242 $(move-if-change) ${@:stmp=T} ${@:stmp=h}
1245 # Dump the GCC macros used by the default compiler flags to a header
1246 # file, so that they can be inspected when using different compiler
1247 # flags. Add the GCCMACRO prefix to make these macro names unique.
1248 $(common-objpfx)gcc-macros.h.in: $(common-objpfx)config.status
1249 $(CC) $(CFLAGS) $(CPPFLAGS) -E -dM -x c -o $@ /dev/null
1250 $(common-objpfx)gcc-macros.h: $(common-objpfx)gcc-macros.h.in
1251 sed 's/^#define /#define GCCMACRO/' < $< > $@
1252 before-compile += $(common-objpfx)gcc-macros.h
1254 # Generate version maps, but wait until sysdep-subdirs is known
1255 ifeq ($(sysd-sorted-done),t)
1256 ifeq ($(build-shared),yes)
1257 -include $(common-objpfx)sysd-versions
1258 -include $(common-objpfx)Versions.mk
1259 $(addprefix $(common-objpfx),$(version-maps)): $(common-objpfx)sysd-versions
1260 common-generated += $(version-maps)
1261 postclean-generated += sysd-versions Versions.all abi-versions.h \
1262 Versions.def Versions.v.i Versions.v Versions.mk
1264 ifndef avoid-generated
1265 ifneq ($(sysd-versions-subdirs),$(sorted-subdirs) $(config-sysdirs))
1266 sysd-versions-force = FORCE
1270 $(common-objpfx)Versions.def: $(..)scripts/versionlist.awk \
1271 $(common-objpfx)Versions.v
1272 LC_ALL=C $(AWK) -f $^ > $@T
1275 $(common-objpfx)Versions.all: $(..)scripts/firstversions.awk \
1276 $(common-objpfx)soversions.i \
1277 $(common-objpfx)Versions.def
1278 { while read which lib version setname; do \
1279 test x"$$which" = xDEFAULT || continue; \
1280 test -z "$$setname" || echo "$$lib : $$setname"; \
1281 done < $(word 2,$^); \
1283 } | LC_ALL=C $(AWK) -f $< > $@T
1285 $(common-objpfx)Versions.mk: $(..)scripts/haveversions.awk \
1286 $(common-objpfx)Versions.all
1289 # See %.v/%.v.i implicit rules in Makeconfig.
1290 $(common-objpfx)Versions.v.i: $(wildcard $(subdirs:%=$(..)%/Versions)) \
1291 $(wildcard $(sysdirs:%=%/Versions)) \
1292 $(sysd-versions-force)
1293 $(common-objpfx)sysd-versions: $(common-objpfx)versions.stmp
1294 $(common-objpfx)versions.stmp: $(common-objpfx)Versions.all \
1295 $(common-objpfx)Versions.v \
1296 $(..)scripts/versions.awk
1297 ( echo 'sysd-versions-subdirs = $(subdirs) $(config-sysdirs)' ; \
1299 | LC_ALL=C $(AWK) -v buildroot=$(common-objpfx) -v defsfile=$< \
1300 -v move_if_change='$(move-if-change)' \
1302 ) > $(common-objpfx)sysd-versionsT
1303 mv -f $(common-objpfx)sysd-versionsT $(common-objpfx)sysd-versions
1305 endif # avoid-generated
1306 endif # $(build-shared) = yes
1308 -include $(common-objpfx)time64-compat.mk
1309 postclean-generated += time64-compat.mk
1311 $(common-objpfx)time64-compat.mk: $(common-objpfx)time64-compat.mk.i \
1312 $(sysd-versions-force)
1313 sed '/^[ ]*#/d;/^[ ]*$$/d' $< > $@T
1315 $(common-objpfx)time64-compat.mk.i: $(..)Makeconfig
1316 printf "#include <time64-compat.h>\n#ifdef TIME64_NON_DEFAULT\nhave-time64-compat = yes\n#endif" \
1317 | $(CC) -E -undef $(CPPFLAGS) -x assembler-with-cpp - > $@T
1321 endif # sysd-sorted-done
1323 # The name under which the run-time dynamic linker is installed.
1324 # We are currently going for the convention that `/lib/ld.so.1'
1325 # names the SVR4/ELF ABI-compliant dynamic linker.
1326 ifndef rtld-installed-name
1328 rtld-installed-name = $(ld.so-version)
1330 rtld-installed-name = ld.so.1
1334 ifndef rtld-version-installed-name
1335 rtld-version-installed-name = ld-$(version).so
1338 endif # build-shared
1341 ifeq ($(build-shared),yes)
1342 libm = $(common-objpfx)math/libm.so$(libm.so-version)
1343 libmvec = $(common-objpfx)mathvec/libmvec.so$(libmvec.so-version)
1345 libm = $(common-objpfx)math/libm.a
1346 libmvec = $(common-objpfx)mathvec/libmvec.a
1349 ifeq ($(build-shared),yes)
1350 libsupport = $(common-objpfx)support/libsupport_nonshared.a
1352 libsupport = $(common-objpfx)support/libsupport.a
1355 # This is a partial list of subdirectories containing the library source.
1356 # The order is more or less arbitrary. The sorting step will take care of the
1357 # dependencies and generate sorted-subdirs dynamically.
1358 all-subdirs = csu assert ctype locale intl catgets math setjmp signal \
1359 stdlib stdio-common libio malloc string wcsmbs time dirent \
1360 grp pwd posix io termios resource misc socket sysvipc gmon \
1361 gnulib iconv iconvdata wctype manual shadow gshadow po argp \
1362 localedata timezone rt conform debug mathvec support \
1365 ifeq ($(build-crypt),yes)
1366 all-subdirs += crypt
1370 ifndef avoid-generated
1371 # sysd-sorted itself will contain rules making the sysd-sorted target
1372 # depend on Depend files. But if you just added a Depend file to an
1373 # existing directory not in all-subdirs, then sysd-sorted needs to
1374 # be regenerated, so it depends on existing $(sorted-subdirs:=/Depend) files.
1375 all-Depend-files := $(wildcard $(sort \
1376 $(foreach dir,$(all-subdirs),\
1377 $(firstword $($(dir)-srcdir) \
1378 $(..)$(dir))/Depend) \
1379 $(sorted-subdirs:=/Depend)))
1380 $(common-objpfx)sysd-sorted: $(..)scripts/gen-sorted.awk \
1381 $(common-objpfx)config.make $(..)Makeconfig \
1382 $(wildcard $(sysdirs:=/Subdirs)) \
1385 -v subdirs='$(all-subdirs)' \
1387 $(filter %/Subdirs %/Depend,$^) > $@-tmp
1389 $(all-Depend-files): ;
1392 # This gives partial TARGET:SOURCE pattern pairs to have rules
1393 # emitted into sysd-rules. A sysdeps Makeconfig fragment can
1394 # add its own special object file prefix to this list with e.g. foo-%:%
1395 # to have foo-*.? compiled from *.? using $(foo-CPPFLAGS).
1396 sysd-rules-patterns := %:% rtld-%:rtld-% rtld-%:% m_%:s_%
1398 # Let sysdeps/ subdirs contain a Makeconfig fragment for us to include here.
1399 sysdep-makeconfigs := $(wildcard $(+sysdep_dirs:=/Makeconfig))
1400 ifneq (,$(sysdep-makeconfigs))
1401 include $(sysdep-makeconfigs)
1404 # Compute just the target patterns. Makeconfig has set sysd-rules-patterns.
1405 sysd-rules-targets := $(sort $(foreach p,$(sysd-rules-patterns),\
1406 $(firstword $(subst :, ,$p))))
1408 # $(libpthread-routines-var) and $(librt-routines-var) are the make
1409 # variable to which pthread routines need to be added to land in the
1411 ifeq ($(pthread-in-libc),yes)
1412 libpthread-routines-var = routines
1413 librt-routines-var = routines
1414 libanl-routines-var = routines
1416 libpthread-routines-var = libpthread-routines
1417 librt-routines-var = librt-routines
1418 libanl-routines-var = libanl-routines
1421 # A sysdeps Makeconfig fragment may set libc-reentrant to yes.
1422 ifeq (yes,$(libc-reentrant))
1423 defines += -D_LIBC_REENTRANT
1425 libio-mtsafe = -D_IO_MTSAFE_IO
1428 # The name to give to a test in test results summaries.
1429 test-name = $(strip $(patsubst %.out, %, $(patsubst $(common-objpfx)%, %, $@)))
1431 # Likewise, in XFAIL variable names.
1432 test-xfail-name = $(strip $(patsubst %.out, %, $(patsubst $(objpfx)%, %, $@)))
1434 # Command to output a test status line (such as PASS: test-name). If
1435 # test-xfail-$(test-xfail-name) has a nonempty value, the status will be
1436 # XPASS or XFAIL rather than PASS or FAIL.
1437 evaluate-test = $(..)scripts/evaluate-test.sh $(test-name) $$? \
1438 $(if $(test-xfail-$(test-xfail-name)),true,false) \
1439 $(if $(stop-on-test-failure),true,false) \
1440 > $(common-objpfx)$(test-name).test-result
1442 endif # Makeconfig not yet included