1 # Copyright (C) 1991, 92, 93, 94, 95, 96, 97, 98 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 Library General Public License as
6 # published by the Free Software Foundation; either version 2 of the
7 # 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 # Library General Public License for more details.
14 # You should have received a copy of the GNU Library General Public
15 # License along with the GNU C Library; see the file COPYING.LIB. If not,
16 # write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 # Boston, MA 02111-1307, USA.
20 # Makefile configuration options for the GNU C library.
23 This makefile requires GNU Make.
26 all: # Make this the default goal
28 ifneq "$(origin +included-Makeconfig)" "file"
30 +included-Makeconfig := yes
36 # If config.make exists, the source directory was configured,
37 # so don't try to be clever and find another directory to build in.
38 ifneq (,$(wildcard $(..)config.make))
41 else # Not configured.
49 # Directory for object files and libc.a. If this is not defined, the
50 # object files live in the subdirectories where their sources live, and
51 # libc.a lives in the parent directory (this probably doesn't work any
54 ifeq ($(filter /%,$(ARCH)),)
55 objdir := $(..)$(ARCH)
61 # $(common-objdir) is the place to put objects and
62 # such that are not specific to a single subdir.
64 objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/)
65 common-objpfx = $(objdir)/
66 common-objdir = $(objdir)
73 # This is a kludge. make wizards might grok.
74 common-objpfx = sysdeps/../
79 # Root of the sysdeps tree.
80 sysdep_dir := $(..)sysdeps
81 export sysdep_dir := $(sysdep_dir)
83 # Get the values defined by options to `configure'.
84 include $(common-objpfx)config.make
86 # We have a special subdir for each binary format.
87 # For now, only ELF is fully supported.
91 # This is probably better than nothing.
95 # Complete path to sysdep dirs.
96 full-config-sysdirs := $(filter /%, $(config-sysdirs)) \
97 $(addprefix $(..), $(filter-out /%, $(config-sysdirs)))
98 export full-config-sysdirs := $(full-config-sysdirs)
100 # Run config.status to update config.make and config.h. We don't show the
101 # dependence of config.h to Make, because it is only touched when it
102 # changes and so config.status would be run every time; the dependence of
103 # config.make should suffice to force regeneration and re-exec, and the new
104 # image will notice if config.h changed.
105 $(common-objpfx)config.make: $(common-objpfx)config.status \
106 $(..)config.make.in $(..)config.h.in
107 cd $(<D); $(SHELL) $(<F)
109 # Find all the sysdeps configure fragments, to make sure we re-run
110 # configure when any of them changes.
111 $(common-objpfx)config.status: $(..)version.h $(..)configure \
112 $(foreach dir,$(full-config-sysdirs),\
116 $(firstword $(wildcard \
117 $(addprefix $(dir)/,configure configure.in)))))
118 @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
119 echo The GNU C library has not been configured. >&2; \
120 echo Run \`configure\' to configure it before building. >&2; \
121 echo Try \`configure --help\' for more details. >&2; \
124 # We don't want CPPFLAGS to be exported to the command running configure.
127 # Get the user's configuration parameters.
128 ifneq ($(wildcard $(..)configparms),)
129 include $(..)configparms
132 ifneq ($(wildcard $(common-objpfx)configparms),)
133 include $(common-objpfx)configparms
138 #### These are the configuration variables. You can define values for
139 #### the variables below in the file `configparms'.
140 #### Do NOT edit this file.
144 # Set this to either `stdio' or `libio', to compile in either GNU stdio
150 # Common prefix for machine-independent installation directories.
151 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
155 # Decide whether we shall build the programs or not. We always do this
156 # unless the user tells us (in configparms) or we are building for a
158 ifndef build-programs
159 ifneq ($(config-os),none)
166 # Common prefix for machine-dependent installation directories.
167 ifeq ($(origin exec_prefix),undefined)
168 exec_prefix = $(prefix)
171 # Where to install the library and object files.
173 libdir = $(exec_prefix)/lib
175 inst_libdir = $(install_root)$(libdir)
177 # Where to install the shared library and dynamic linker.
179 slibdir = $(exec_prefix)/lib
181 inst_slibdir = $(install_root)$(slibdir)
183 # Prefix to put on files installed in $(libdir). For libraries `libNAME.a',
184 # the prefix is spliced between `lib' and the name, so the linker switch
185 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
186 # just prepended to the whole file name.
187 ifeq ($(origin libprefix),undefined)
191 # Where to install the header files.
193 includedir = $(exec_prefix)/include
195 inst_includedir = $(install_root)$(includedir)
197 # Where to install machine-independent data files.
198 # These are the timezone database, and the locale database.
200 datadir = $(prefix)/share
202 inst_datadir = $(install_root)$(datadir)
204 # Where to install the timezone data files (which are machine-independent).
206 zonedir = $(datadir)/zoneinfo
208 inst_zonedir = $(install_root)$(zonedir)
210 # Where to install the locale and message catalog data files (which are
211 # machine-independent).
213 localedir = $(datadir)/locale
215 inst_localedir = $(install_root)$(localedir)
217 # Where to install the locale charmap source files.
219 i18ndir = $(datadir)/i18n
221 inst_i18ndir = $(install_root)$(i18ndir)
223 # Where to install the shared object for charset transformation.
225 gconvdir = $(libdir)/gconv
227 inst_gconvdir = $(install_root)$(gconvdir)
229 # Where to install programs.
231 bindir = $(exec_prefix)/bin
233 inst_bindir = $(install_root)$(bindir)
235 # Where to install internal programs.
237 libexecdir = $(exec_prefix)/libexec
239 inst_libexecdir = $(install_root)$(libexecdir)
241 # Where to install administrative programs.
243 rootsbindir = $(exec_prefix)/sbin
245 inst_rootsbindir = $(install_root)$(rootsbindir)
248 sbindir = $(exec_prefix)/sbin
250 inst_sbindir = $(install_root)$(sbindir)
252 # Where to install the Info files.
254 infodir = $(prefix)/info
256 inst_infodir = $(install_root)$(infodir)
258 # Where to install default configuration files. These include the local
259 # timezone specification and network data base files.
261 sysconfdir = $(prefix)/etc
263 inst_sysconfdir = $(install_root)$(sysconfdir)
265 # What timezone should be the installed default (e.g., US/Eastern).
266 # Run `make -C time echo-zonenames' to see a list of available zone names.
267 # The local timezone can be changed with `zic -l TIMEZONE' at any time.
272 # Where to install the "localtime" timezone file; this is the file whose
273 # contents $(localtime) specifies. If this is a relative pathname, it is
274 # relative to $(zonedir). It is a good idea to put this somewhere
275 # other than there, so the zoneinfo directory contains only universal data,
276 # localizing the configuration data elsewhere.
277 ifndef localtime-file
278 localtime-file = $(sysconfdir)/localtime
279 inst_localtime-file = $(install_root)$(localtime-file)
282 # What to use for leap second specifications in compiling the default
283 # timezone files. Set this to `/dev/null' for no leap second handling as
284 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
285 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
286 # This variable determines the default: if it's `/dev/null',
287 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
289 leapseconds = /dev/null
292 # What timezone's DST rules should be used when a POSIX-style TZ
293 # environment variable doesn't specify any rules. For 1003.1 compliance
294 # this timezone must use rules that are as U.S. federal law defines DST.
295 # Run `make -C time echo-zonenames' to see a list of available zone names.
296 # This setting can be changed with `zic -p TIMEZONE' at any time.
297 # If you want POSIX.1 compatibility, use `America/New_York'.
299 posixrules = America/New_York
302 # Where to install the "posixrules" timezone file; this is file
303 # whose contents $(posixrules) specifies. If this is a relative
304 # pathname, it is relative to $(zonedir).
305 ifndef posixrules-file
306 posixrules-file = posixrules
310 # Directory where your system's native header files live.
311 # This is used on Unix systems to generate some GNU libc header files.
313 sysincludedir = /usr/include
317 # Commands to install files.
319 INSTALL_DATA = $(INSTALL) -m 644
321 ifndef INSTALL_PROGRAM
322 INSTALL_PROGRAM = $(INSTALL)
329 # The name of the C compiler.
330 # If you've got GCC, and it works, use it.
331 ifeq ($(origin CC),default)
335 # The name of the C compiler to use for compilations of programs to run on
336 # the host that is building the library. If you set CC to a
337 # cross-compiler, you must set this to the normal compiler.
342 # Default flags to pass the C compiler.
343 ifndef default_cflags
344 default_cflags := -g -O
347 # Flags to pass the C compiler when assembling preprocessed assembly code
348 # (`.S' files). On some systems the assembler doesn't understand the `#' line
349 # directives the preprocessor produces. If you have troubling compiling
350 # assembly code, try using -P here to suppress these directives.
355 # ELF always supports init/fini sections
360 # Installed name of the startup code.
361 ifneq ($(have-initfini),yes)
362 # When not having init/fini, there is just one startfile, called crt0.o.
363 start-installed-name = crt0.o
365 # On systems having init/fini, crt0.o is called crt1.o, and there are
366 # some additional bizarre files.
367 start-installed-name = crt1.o
371 # Command for linking programs with the C library.
373 +link = $(CC) -nostdlib -nostartfiles -o $@ \
374 $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) \
375 $(addprefix $(csu-objpfx),$(start-installed-name)) \
376 $(+preinit) $(+prector) \
377 $(filter-out $(addprefix $(csu-objpfx),start.o \
378 $(start-installed-name))\
379 $(+preinit) $(link-extra-libs) \
380 $(common-objpfx)libc% $(+postinit),$^) \
381 $(link-extra-libs) $(link-libc) $(+postctor) $(+postinit)
383 # Command for statically linking programs with the C library.
385 +link-static = $(CC) -nostdlib -nostartfiles -static -o $@ \
386 $(sysdep-LDFLAGS) $(LDFLAGS) \
387 $(addprefix $(csu-objpfx),$(start-installed-name)) \
388 $(+preinit) $(+prector) \
389 $(filter-out $(addprefix $(csu-objpfx),start.o \
390 $(start-installed-name))\
391 $(+preinit) $(link-extra-libs-static) \
392 $(common-objpfx)libc% $(+postinit),$^) \
393 $(link-extra-libs-static) $(link-libc-static) $(+postctor) $(+postinit)
395 ifndef config-LDFLAGS
396 ifeq (yes,$(build-shared))
397 config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
401 ifeq (yes,$(build-shared))
402 # We need the versioned name of libc.so in the deps of $(others) et al
403 # so that the symlink to libc.so is created before anything tries to
404 # run the linked programs.
405 link-libc = -Wl,-rpath-link=$(rpath-link) \
406 $(common-objpfx)libc.so$(libc.so-version) \
407 $(elfobjdir)/$(rtld-installed-name) \
408 $(common-objpfx)libc.a $(gnulib)
409 # Choose the default search path for the dynamic linker based on
410 # where we will install libraries.
411 ifneq ($(libdir),$(slibdir))
412 default-rpath = $(slibdir):$(libdir)
414 default-rpath = $(libdir)
416 # This is how to find at build-time things that will be installed there.
417 rpath-link = $(common-objdir):$(mathobjdir):$(elfobjdir):$(nssobjdir):$(dbobjdir)
418 mathobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)math)
419 elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf)
420 nssobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)nss)
421 dbobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)db2)
423 link-libc = $(common-objpfx)libc.a $(gnulib) $(common-objpfx)libc.a
427 ifndef link-extra-libs
428 ifeq (yes,$(build-shared))
429 ifneq ($(common-objpfx),$(objpfx))
430 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),\
431 $(wildcard $(common-objpfx)$(lib).so$($(notdir $(lib)).so-version) \
432 $(objpfx)$(lib).so$($(notdir $(lib)).so-version)))
434 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).so$($(notdir $(lib)).so-version))
437 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).a)
441 # The static libraries.
442 link-libc-static = $(common-objpfx)libc.a $(gnulib) $(common-objpfx)libc.a
443 link-extra-libs-static = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).a)
449 +preinit = $(addprefix $(csu-objpfx),crti.o)
450 +postinit = $(addprefix $(csu-objpfx),crtn.o)
451 +prector = `$(CC) --print-file-name=crtbegin.o`
452 +postctor = `$(CC) --print-file-name=crtend.o`
454 csu-objpfx = $(common-objpfx)csu/
455 elf-objpfx = $(common-objpfx)elf/
456 db-objpfx = $(common-objpfx)db/
458 # How to run a program we just linked with our library.
459 # The program binary is assumed to be $(word 2,$^).
460 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
461 ifneq (yes,$(build-shared))
462 built-program-cmd = $(built-program-file)
465 sysdep-library-path = \
466 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
467 $(filter -Wl$(comma)-rpath-link=%,\
468 $(sysdep-LDFLAGS)))))
469 define built-program-cmd
470 $(elf-objpfx)$(rtld-installed-name) \
471 --library-path $(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) \
472 $(built-program-file)
484 # Extra flags to pass to GCC.
485 +gccwarn := -Wall -Wwrite-strings -Wno-parentheses -Winline -Wstrict-prototypes
487 # This is the program that generates makefile
488 # dependencies from C source files.
493 # The program that makes Emacs-style TAGS files.
496 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
497 # perhaps others) to preprocess assembly code in some cases.
501 #### End of configuration variables.
504 # This tells some versions of GNU make before 3.63 not to export all variables.
507 # We want to echo the commands we're running without
508 # umpteen zillion filenames along with it (we use `...' instead)
509 # but we don't want this echoing done when the user has said
510 # he doesn't want to see commands echoed by using -s.
511 ifneq "$(findstring s,$(MAKEFLAGS))" "" # if -s
512 +cmdecho := echo >/dev/null
517 # These are the flags given to the compiler to tell
518 # it what sort of optimization and/or debugging output to do.
520 # If `CFLAGS' was defined, use that.
522 +cflags := $(filter-out -I%,$(CFLAGS))
526 # If none of the above worked, default to "-g -O".
527 ifeq "$(strip $(+cflags))" ""
528 +cflags := $(default_cflags)
529 endif # $(+cflags) == ""
531 +cflags := $(+cflags) $(+gccwarn)
534 # Don't duplicate options if we inherited variables from the parent.
535 +cflags := $(sort $(+cflags))
538 # These are flags given to the C compiler to tell it to look for include
539 # files (including ones given in angle brackets) in the current directory,
540 # in the parent library source directory and in the include directory.
541 # `+sysdep-includes' will be defined by Makerules.
542 +includes = -I. $(patsubst %/,-I%,$(objpfx)) $(patsubst %/,-I%,$(..)) \
543 -I$(..)include $($(stdio)-include) $(includes) \
544 $(+sysdep-includes) $(last-includes)
546 # Since libio has several internal header files, we use a -I instead
547 # of many little headers in the include directory.
548 libio-include = -I$(..)libio
550 # These are the variables that the implicit compilation rules use.
551 CPPFLAGS = $(+includes) $(defines) -include $(..)include/libc-symbols.h \
552 $(sysdep-CPPFLAGS) $(CPPFLAGS-$(suffix $@)) $(CPPFLAGS-$(<F)) \
554 override CFLAGS = $(filter-out %frame-pointer,$(+cflags)) $(sysdep-CFLAGS) \
555 $(CFLAGS-$(suffix $@)) $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
558 # This is the macro that the implicit linking rules use.
559 ifneq "$(filter -g,$(+cflags))" "" # -g is in $(+cflags)
564 # If everything is compiled with -fPIC (implicitly) we must tell this by
565 # defining the PIC symbol.
566 ifeq (yes,$(build-pic-default))
570 # Enable object files for different versions of the library.
571 # Various things use $(object-suffixes) to know what all to make.
572 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
573 # to pass different flags for each flavor.
574 libtypes = $(foreach o,$(object-suffixes),$(libtype$o))
575 all-object-suffixes := .o .os .op .og .ob
577 ifeq (yes,$(build-static))
578 CPPFLAGS-.o = $(pic-default)
579 CFLAGS-.o = $(filter %frame-pointer,$(+cflags))
581 object-suffixes += .o
583 ifeq (yes,$(build-shared))
584 # Under --enable-shared, we will build a shared library of PIC objects.
585 # The PIC object files are named foo.os.
586 object-suffixes += .os
588 CFLAGS-.os = $(filter %frame-pointer,$(+cflags)) $(pic-ccflag)
589 libtype.os := lib%_pic.a
590 # This can be changed by a sysdep makefile
593 ifeq (yes,$(build-profile))
594 # Under --enable-profile, we will build a static library of profiled objects.
595 # The profiled object files are named foo.op.
596 object-suffixes += .op
597 CPPFLAGS-.op = -DPROF $(pic-default)
599 libtype.op = lib%_p.a
601 ifeq (yes,$(build-omitfp))
602 # Under --enable-omitfp, we build an the library optimized without
603 # debugging information using -fomit-frame-pointer, and build an extra
604 # library with debugging information. The debuggable objects are named foo.og.
605 object-suffixes += .og
606 CPPFLAGS-.og = $(pic-default)
608 CFLAGS-.o = $(filter %frame-pointer,$(+cflags)) -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES
609 CFLAGS-.os += -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES
610 libtype.og = lib%_g.a
612 ifeq (yes,$(build-bounded))
613 # Under --enable-bounded, we build the library with `-fbounded-pointers -g'
614 # to runtime bounds checking. The bounded-pointer objects are named foo.ob.
615 object-suffixes += .ob
616 CPPFLAGS-.ob = -DBOUNDED_POINTERS $(pic-default)
617 CFLAGS-.ob = -g -fbounded-pointers
618 libtype.ob = lib%_b.a
622 +gnu-stabs = $(shell echo>&2 '*** BARF ON ME')
628 # Figure out the version numbers from version.h.
630 $(common-objpfx)version.mk: $(..)version.h $(..)Makeconfig
631 sed -n -e 's/^.*RELEASE.*"\([^"]*\)".*$$/release=\1/p' \
632 -e 's/^.*VERSION.*"\([^"]*\)".*$$/version=\1/p' \
636 common-generated += version.mk
638 ifeq (yes, $(build-shared))
640 # Process the shlib-versions file, which tells us what shared library
641 # version numbers to use when we install shared objects on this system.
642 -include $(common-objpfx)soversions.mk
643 ifndef avoid-generated
644 $(common-objpfx)soversions.mk: $(..)shlib-versions $(..)Makeconfig \
645 $(wildcard $(patsubst %, $(..)%/shlib-versions,\
647 $(common-objpfx)config.make
648 (file="$(wildcard $(patsubst %,$(..)%/shlib-versions,$(add-ons))) \
649 $(..)shlib-versions"; \
650 for f in $$file; do \
651 sed 's/#.*$$//' $$f | while read conf versions; do \
652 test -n "$$versions" && \
653 test `expr '$(config-machine)-$(config-vendor)-$(config-os)' \
654 : "$$conf"` != 0 || continue; \
655 for v in $$versions; do \
656 lib=`echo $$v | sed 's/=.*$$//'`; \
657 if eval "test -z \"\$$vers_lib$$lib\""; then \
658 eval vers_lib$${lib}=yes; \
659 number=`echo $$v | sed "s/^.*=//"`; \
661 [0-9]*) echo "$$lib.so-version=.$$number"; \
662 echo "all-sonames+=$$lib.so\$$($$lib.so-version)";;\
663 *) echo "$$lib.so-version=$$number"; \
664 echo "all-sonames+=\$$($$lib.so-version)";; \
673 postclean-generated += soversions.mk
675 ifndef avoid-generated
676 # Get $(version) defined with the release version number.
677 -include $(common-objpfx)version.mk
680 # Generate the header containing the names of all shared libraries.
681 # We use a stamp file to avoid uncessary recompilations.
682 before-compile += $(common-objpfx)gnu/lib-names.h
683 $(common-objpfx)gnu/lib-names.h: $(common-objpfx)gnu/lib-names.stmp
684 $(common-objpfx)gnu/lib-names.stmp: $(common-objpfx)soversions.mk
685 $(make-target-directory)
686 @rm -f ${@:stmp=T} $@
687 (echo '/* This file is automatically generated.';\
688 echo ' It defines macros to allow user program to find the shared';\
689 echo ' library files which come as part of GNU libc. */';\
690 echo '#ifndef __GNU_LIB_NAMES_H'; \
691 echo '#define __GNU_LIB_NAMES_H 1'; \
693 (libs='$(all-sonames)';\
694 for l in $$libs; do \
695 upname=`echo $$l | sed 's/[.]so.*//' | \
696 tr 'abcdefghijklmnopqrstuvwxyz-' \
697 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`; \
698 echo "#define $${upname}_SO \"$$l\""; \
701 echo '#endif /* gnu/lib-names.h */';) > ${@:stmp=T}
702 if test -r ${@:stmp=h} && cmp -s ${@:stmp=h} ${@:stmp=T}; \
703 then rm -f ${@:stmp=T}; \
704 else mv -f ${@:stmp=T} ${@:stmp=h}; fi
707 common-generated += gnu/lib-names.h gnu/lib-names.stmp
709 # The name under which the run-time dynamic linker is installed.
710 # We are currently going for the convention that `/lib/ld.so.1'
711 # names the SVR4/ELF ABI-compliant dynamic linker.
712 ifndef rtld-installed-name
714 rtld-installed-name = $(ld.so-version)
716 rtld-installed-name = ld.so.1
720 ifndef rtld-version-installed-name
721 rtld-version-installed-name = ld-$(version).so
724 # The librt must be linked with the thread library, at least
726 ifneq (,$(findstring linuxthreads,$(add-ons)))
727 shared-thread-library = $(common-objpfx)linuxthreads/libpthread.so
728 # Yes, we can compile librt.
734 endif # Makeconfig not yet included