1 # Copyright (C) 1991, 92, 93, 94, 95, 96, 97 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) $(@F) --recheck; else \
119 echo The GNU C library has not been configured. >&2; \
120 echo Run \`configure\' to configure it before building. >&2; \
121 echo Try \`configure --help\' for more details. >&2; \
124 # Get the user's configuration parameters.
125 ifneq ($(wildcard $(..)configparms),)
126 include $(..)configparms
129 ifneq ($(wildcard $(common-objpfx)configparms),)
130 include $(common-objpfx)configparms
135 #### These are the configuration variables. You can define values for
136 #### the variables below in the file `configparms'.
137 #### Do NOT edit this file.
141 # Set this to either `stdio' or `libio', to compile in either GNU stdio
147 # Common prefix for machine-independent installation directories.
148 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
152 # Decide whether we shall build the programs or not. We always do this
153 # unless the user tells us (in configparms) or we are building for a
155 ifndef build-programs
156 ifneq ($(config-os),none)
163 # Common prefix for machine-dependent installation directories.
164 ifeq ($(origin exec_prefix),undefined)
165 exec_prefix = $(prefix)
168 # Where to install the library and object files.
170 libdir = $(exec_prefix)/lib
172 inst_libdir = $(install_root)$(libdir)
174 # Where to install the shared library and dynamic linker.
176 slibdir = $(exec_prefix)/lib
178 inst_slibdir = $(install_root)$(slibdir)
180 # Prefix to put on files installed in $(libdir). For libraries `libNAME.a',
181 # the prefix is spliced between `lib' and the name, so the linker switch
182 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
183 # just prepended to the whole file name.
184 ifeq ($(origin libprefix),undefined)
188 # Where to install the header files.
190 includedir = $(exec_prefix)/include
192 inst_includedir = $(install_root)$(includedir)
194 # Where to install machine-independent data files.
195 # These are the timezone database, and the locale database.
197 datadir = $(prefix)/share
199 inst_datadir = $(install_root)$(datadir)
201 # Where to install the timezone data files (which are machine-independent).
203 zonedir = $(datadir)/zoneinfo
205 inst_zonedir = $(install_root)$(zonedir)
207 # Where to install the locale and message catalog data files (which are
208 # machine-independent).
210 localedir = $(datadir)/locale
212 inst_localedir = $(install_root)$(localedir)
214 # Where to install the locale charmap source files.
216 i18ndir = $(datadir)/i18n
218 inst_i18ndir = $(install_root)$(i18ndir)
221 # Where to install programs.
223 bindir = $(exec_prefix)/bin
225 inst_bindir = $(install_root)$(bindir)
227 # Where to install administrative programs.
229 rootsbindir = $(exec_prefix)/sbin
231 inst_rootsbindir = $(install_root)$(rootsbindir)
234 sbindir = $(exec_prefix)/sbin
236 inst_sbindir = $(install_root)$(sbindir)
238 # Where to install the Info files.
240 infodir = $(prefix)/info
242 inst_infodir = $(install_root)$(infodir)
244 # Where to install default configuration files. These include the local
245 # timezone specification and network data base files.
247 sysconfdir = $(prefix)/etc
249 inst_sysconfdir = $(install_root)$(sysconfdir)
251 # What timezone should be the installed default (e.g., US/Eastern).
252 # Run `make -C time echo-zonenames' to see a list of available zone names.
253 # The local timezone can be changed with `zic -l TIMEZONE' at any time.
258 # Where to install the "localtime" timezone file; this is the file whose
259 # contents $(localtime) specifies. If this is a relative pathname, it is
260 # relative to $(zonedir). It is a good idea to put this somewhere
261 # other than there, so the zoneinfo directory contains only universal data,
262 # localizing the configuration data elsewhere.
263 ifndef localtime-file
264 localtime-file = $(sysconfdir)/localtime
265 inst_localtime-file = $(install_root)$(localtime-file)
268 # What to use for leap second specifications in compiling the default
269 # timezone files. Set this to `/dev/null' for no leap second handling as
270 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
271 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
272 # This variable determines the default: if it's `/dev/null',
273 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
275 leapseconds = /dev/null
278 # What timezone's DST rules should be used when a POSIX-style TZ
279 # environment variable doesn't specify any rules. For 1003.1 compliance
280 # this timezone must use rules that are as U.S. federal law defines DST.
281 # Run `make -C time echo-zonenames' to see a list of available zone names.
282 # This setting can be changed with `zic -p TIMEZONE' at any time.
283 # If you want POSIX.1 compatibility, use `America/New_York'.
285 posixrules = America/New_York
288 # Where to install the "posixrules" timezone file; this is file
289 # whose contents $(posixrules) specifies. If this is a relative
290 # pathname, it is relative to $(zonedir).
291 ifndef posixrules-file
292 posixrules-file = posixrules
296 # Directory where your system's native header files live.
297 # This is used on Unix systems to generate some GNU libc header files.
299 sysincludedir = /usr/include
303 # Commands to install files.
305 INSTALL_DATA = $(INSTALL) -m 644
307 ifndef INSTALL_PROGRAM
308 INSTALL_PROGRAM = $(INSTALL)
315 # The name of the C compiler.
316 # If you've got GCC, and it works, use it.
317 ifeq ($(origin CC),default)
321 # The name of the C compiler to use for compilations of programs to run on
322 # the host that is building the library. If you set CC to a
323 # cross-compiler, you must set this to the normal compiler.
328 # Default flags to pass the C compiler.
329 ifndef default_cflags
330 default_cflags := -g -O
333 # Flags to pass the C compiler when assembling preprocessed assembly code
334 # (`.S' files). On some systems the assembler doesn't understand the `#' line
335 # directives the preprocessor produces. If you have troubling compiling
336 # assembly code, try using -P here to suppress these directives.
341 # Installed name of the startup code.
343 # When not using ELF, there is just one startfile, called crt0.o.
344 start-installed-name = crt0.o
346 # In the ELF universe, crt0.o is called crt1.o, and there are
347 # some additional bizarre files.
348 start-installed-name = crt1.o
353 # Command for linking programs with the C library.
355 +link = $(CC) -nostdlib -nostartfiles -o $@ \
356 $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) \
357 $(addprefix $(csu-objpfx),$(start-installed-name)) \
358 $(+preinit) $(+prector) \
359 $(filter-out $(addprefix $(csu-objpfx),start.o \
360 $(start-installed-name))\
361 $(+preinit) $(link-extra-libs) \
362 $(common-objpfx)libc% $(+postinit),$^) \
363 $(link-extra-libs) $(link-libc) $(+postctor) $(+postinit)
365 ifndef config-LDFLAGS
366 ifeq (yes,$(build-shared))
367 config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
371 ifeq (yes,$(build-shared))
372 # We need the versioned name of libc.so in the deps of $(others) et al
373 # so that the symlink to libc.so is created before anything tries to
374 # run the linked programs.
375 link-libc = -Wl,-rpath-link=$(rpath-link) \
376 $(common-objpfx)libc.so$(libc.so-version) \
377 $(elfobjdir)/$(rtld-installed-name) \
378 $(common-objpfx)libc.a $(gnulib)
379 # Choose the default search path for the dynamic linker based on
380 # where we will install libraries.
381 ifneq ($(libdir),$(slibdir))
382 default-rpath = $(slibdir):$(libdir)
384 default-rpath = $(libdir)
386 # This is how to find at build-time things that will be installed there.
387 rpath-link = $(common-objdir):$(mathobjdir):$(elfobjdir):$(nssobjdir):$(dbobjdir)
388 mathobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)math)
389 elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf)
390 nssobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)nss)
391 dbobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)db)
393 link-libc = $(common-objpfx)libc.a $(gnulib) $(common-objpfx)libc.a
397 ifndef link-extra-libs
398 ifeq (yes,$(build-shared))
399 ifneq ($(common-objpfx),$(objpfx))
400 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),\
401 $(wildcard $(common-objpfx)$(lib).so$($(notdir $(lib)).so-version) \
402 $(objpfx)$(lib).so$($(notdir $(lib)).so-version)))
404 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).so$($(notdir $(lib)).so-version))
407 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).a)
414 +preinit = $(addprefix $(csu-objpfx),crti.o)
415 +postinit = $(addprefix $(csu-objpfx),crtn.o)
416 +prector = `$(CC) --print-file-name=crtbegin.o`
417 +postctor = `$(CC) --print-file-name=crtend.o`
419 csu-objpfx = $(common-objpfx)csu/
420 elf-objpfx = $(common-objpfx)elf/
421 db-objpfx = $(common-objpfx)db/
423 # How to run a program we just linked with our library.
424 # The program binary is assumed to be $(word 2,$^).
425 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
426 ifneq (yes,$(build-shared))
427 built-program-cmd = $(built-program-file)
430 sysdep-library-path = \
431 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
432 $(filter -Wl$(comma)-rpath-link=%,\
433 $(sysdep-LDFLAGS)))))
434 define built-program-cmd
435 LD_LIBRARY_PATH=$(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) \
436 $(elf-objpfx)$(rtld-installed-name) $(built-program-file)
448 # Extra flags to pass to GCC.
449 +gccwarn := -Wall -Wwrite-strings -Wno-parentheses -Winline -Wstrict-prototypes
451 # This is the program that generates makefile
452 # dependencies from C source files.
457 # The program that makes Emacs-style TAGS files.
460 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
461 # perhaps others) to preprocess assembly code in some cases.
465 #### End of configuration variables.
468 # This tells some versions of GNU make before 3.63 not to export all variables.
471 # We want to echo the commands we're running without
472 # umpteen zillion filenames along with it (we use `...' instead)
473 # but we don't want this echoing done when the user has said
474 # he doesn't want to see commands echoed by using -s.
475 ifneq "$(findstring s,$(MAKEFLAGS))" "" # if -s
476 +cmdecho := echo >/dev/null
481 # These are the flags given to the compiler to tell
482 # it what sort of optimization and/or debugging output to do.
484 # If `CFLAGS' was defined, use that.
486 +cflags := $(filter-out -I%,$(CFLAGS))
490 # If none of the above worked, default to "-g -O".
491 ifeq "$(strip $(+cflags))" ""
492 +cflags := $(default_cflags)
493 endif # $(+cflags) == ""
495 +cflags := $(+cflags) $(+gccwarn)
498 # Don't duplicate options if we inherited variables from the parent.
499 +cflags := $(sort $(+cflags))
502 # These are flags given to the C compiler to tell it to look for include
503 # files (including ones given in angle brackets) in the current directory,
504 # in the parent library source directory and in the include directory.
505 # `+sysdep-includes' will be defined by Makerules.
506 +includes = -I. $(patsubst %/,-I%,$(..)) -I$(..)include $($(stdio)-include) \
507 $(includes) $(+sysdep-includes) $(last-includes)
509 # Since libio has several internal header files, we use a -I instead
510 # of many little headers in the include directory.
511 libio-include = -I$(..)libio
513 # These are the variables that the implicit compilation rules use.
514 CPPFLAGS = $(+includes) $(defines) -include $(..)include/libc-symbols.h \
515 $(sysdep-CPPFLAGS) $(CPPFLAGS-$(suffix $@)) $(CPPFLAGS-$(<F)) \
517 override CFLAGS = $(+cflags) $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) \
518 $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
521 # This is the macro that the implicit linking rules use.
522 ifneq "$(filter -g,$(+cflags))" "" # -g is in $(+cflags)
527 # Enable object files for different versions of the library.
528 # Various things use $(object-suffixes) to know what all to make.
529 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
530 # to pass different flags for each flavor.
531 libtypes = $(foreach o,$(object-suffixes),$(libtype$o))
532 object-suffixes := .o
533 all-object-suffixes := .o .so .po .go .bo
535 ifeq (yes,$(build-shared))
536 # Under --enable-shared, we will build a shared library of PIC objects.
537 # The PIC object files are named foo.so.
538 object-suffixes += .so
540 CFLAGS-.so = -fPIC -fno-common
541 libtype.so := lib%_pic.a
543 ifeq (yes,$(build-profile))
544 # Under --enable-profile, we will build a static library of profiled objects.
545 # The profiled object files are named foo.po.
546 object-suffixes += .po
547 CPPFLAGS-.po = -DPROF
549 libtype.po = lib%_p.a
551 ifeq (yes,$(build-omitfp))
552 # Under --enable-omitfp, we build an the library optimized without
553 # debugging information using -fomit-frame-pointer, and build an extra
554 # library with debugging information. The debuggable objects are named foo.go.
555 object-suffixes += .go
557 CFLAGS-.o = -g0 -O99 -fomit-frame-pointer
558 CFLAGS-.so += $(CFLAGS-.o)
559 libtype.go = lib%_g.a
561 ifeq (yes,$(build-bounded))
562 # Under --enable-bounded, we build the library with `-fbounded-pointers -g'
563 # to runtime bounds checking. The bounded-pointer objects are named foo.bo.
564 object-suffixes += .bo
565 CPPFLAGS-.bo = -DBOUNDED_POINTERS
566 CFLAGS-.bo = -g -fbounded-pointers
567 libtype.bo = lib%_b.a
571 +gnu-stabs = $(shell echo>&2 '*** BARF ON ME')
577 # Figure out the version numbers from version.h.
579 $(common-objpfx)version.mk: $(..)version.h $(..)Makeconfig
580 sed -n -e 's/^.*RELEASE.*"\([^"]*\)".*$$/release=\1/p' \
581 -e 's/^.*VERSION.*"\([^"]*\)".*$$/version=\1/p' \
585 ifeq (yes, $(build-shared))
587 # Process the shlib-versions file, which tells us what shared library
588 # version numbers to use when we install shared objects on this system.
589 -include $(common-objpfx)soversions.mk
590 $(common-objpfx)soversions.mk: $(..)shlib-versions $(..)Makeconfig \
591 $(wildcard $(patsubst %, $(..)%/shlib-versions,\
593 $(common-objpfx)config.make
594 (file="$(wildcard $(patsubst %,$(..)%/shlib-versions,$(add-ons))) \
595 $(..)shlib-versions"; \
596 for f in $$file; do \
597 sed 's/#.*$$//' $$f | while read conf versions; do \
598 test -n "$$versions" && \
599 test `expr '$(config-machine)-$(config-vendor)-$(config-os)' \
600 : "$$conf"` != 0 || continue; \
601 for v in $$versions; do \
602 lib=`echo $$v | sed 's/=.*$$//'`; \
603 if eval "test -z \"\$$vers_lib$$lib\""; then \
604 eval vers_lib$${lib}=yes; \
605 number=`echo $$v | sed "s/^.*=//"`; \
607 [0-9]*) echo "$$lib.so-version=.$$number"; \
608 echo "all-sonames+=$$lib.so\$$($$lib.so-version)";;\
609 *) echo "$$lib.so-version=$$number"; \
610 echo "all-sonames+=\$$($$lib.so-version)";; \
618 # Get $(version) defined with the release version number.
619 -include $(common-objpfx)version.mk
621 # Generate the header containing the names of all shared libraries.
622 # We use a stamp file to avoid uncessary recompilations.
623 before-compile += $(common-objpfx)gnu/lib-names.h
624 $(common-objpfx)gnu/lib-names.h: $(common-objpfx)gnu/lib-names.stmp
625 $(common-objpfx)gnu/lib-names.stmp: $(common-objpfx)soversions.mk
626 $(make-target-directory)
627 @rm -f ${@:stmp=T} $@
628 (echo '/* This file is automatically generated.';\
629 echo ' It defines macros to allow user program to find the shared';\
630 echo ' library files which come as part of GNU libc. */';\
631 echo '#ifndef __GNU_LIB_NAMES_H'; \
632 echo '#define __GNU_LIB_NAMES_H 1'; \
634 (libs='$(all-sonames)';\
635 for l in $$libs; do \
636 upname=`echo $$l | sed 's/[.]so.*//' | \
637 tr 'abcdefghijklmnopqrstuvwxyz-' \
638 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`; \
639 echo "#define $${upname}_SO \"$$l\""; \
642 echo '#endif /* gnu/lib-names.h */';) > ${@:stmp=T}
643 if test -r ${@:stmp=h} && cmp -s ${@:stmp=h} ${@:stmp=T}; \
644 then rm -f ${@:stmp=T}; \
645 else mv -f ${@:stmp=T} ${@:stmp=h}; fi
648 common-generated += gnu/lib-names.h gnu/lib-names.stmp
650 # The name under which the run-time dynamic linker is installed.
651 # We are currently going for the convention that `/lib/ld.so.1'
652 # names the SVR4/ELF ABI-compliant dynamic linker.
653 ifndef rtld-installed-name
655 rtld-installed-name = $(ld.so-version)
657 rtld-installed-name = ld.so.1
661 ifndef rtld-version-installed-name
662 rtld-version-installed-name = ld-$(version).so
667 endif # Makeconfig not yet included