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 # Complete path to sysdep dirs.
87 full-config-sysdirs := $(filter /%, $(config-sysdirs)) \
88 $(addprefix $(..), $(filter-out /%, $(config-sysdirs)))
89 export full-config-sysdirs := $(full-config-sysdirs)
91 # Run config.status to update config.make and config.h. We don't show the
92 # dependence of config.h to Make, because it is only touched when it
93 # changes and so config.status would be run every time; the dependence of
94 # config.make should suffice to force regeneration and re-exec, and the new
95 # image will notice if config.h changed.
96 $(common-objpfx)config.make: $(common-objpfx)config.status \
97 $(..)config.make.in $(..)config.h.in
98 cd $(<D); $(SHELL) $(<F)
100 # Find all the sysdeps configure fragments, to make sure we re-run
101 # configure when any of them changes.
102 $(common-objpfx)config.status: $(..)version.h $(..)configure \
103 $(foreach dir,$(full-config-sysdirs),\
107 $(firstword $(wildcard \
108 $(addprefix $(dir)/,configure configure.in)))))
109 @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
110 echo The GNU C library has not been configured. >&2; \
111 echo Run \`configure\' to configure it before building. >&2; \
112 echo Try \`configure --help\' for more details. >&2; \
115 # Get the user's configuration parameters.
116 ifneq ($(wildcard $(..)configparms),)
117 include $(..)configparms
120 ifneq ($(wildcard $(common-objpfx)configparms),)
121 include $(common-objpfx)configparms
126 #### These are the configuration variables. You can define values for
127 #### the variables below in the file `configparms'.
128 #### Do NOT edit this file.
132 # Set this to either `stdio' or `libio', to compile in either GNU stdio
138 # Common prefix for machine-independent installation directories.
139 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
143 # Common prefix for machine-dependent installation directories.
144 ifeq ($(origin exec_prefix),undefined)
145 exec_prefix = $(prefix)
148 # Where to install the library and object files.
150 libdir = $(exec_prefix)/lib
152 inst_libdir = $(install_root)$(libdir)
154 # Where to install the shared library and dynamic linker.
156 slibdir = $(exec_prefix)/lib
158 inst_slibdir = $(install_root)$(slibdir)
160 # Prefix to put on files installed in $(libdir). For libraries `libNAME.a',
161 # the prefix is spliced between `lib' and the name, so the linker switch
162 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
163 # just prepended to the whole file name.
164 ifeq ($(origin libprefix),undefined)
168 # Where to install the header files.
170 includedir = $(exec_prefix)/include
172 inst_includedir = $(install_root)$(includedir)
174 # Where to install machine-independent data files.
175 # These are the timezone database, and the locale database.
177 datadir = $(prefix)/share
179 inst_datadir = $(install_root)$(datadir)
181 # Where to install the timezone data files (which are machine-independent).
183 zonedir = $(datadir)/zoneinfo
185 inst_zonedir = $(install_root)$(zonedir)
187 # Where to install the locale and message catalog data files (which are
188 # machine-independent).
190 localedir = $(datadir)/locale
192 inst_localedir = $(install_root)$(localedir)
194 # Where to install the locale charmap source files.
196 i18ndir = $(datadir)/i18n
198 inst_i18ndir = $(install_root)$(i18ndir)
201 # Where to install programs.
203 bindir = $(exec_prefix)/bin
205 inst_bindir = $(install_root)$(bindir)
207 # Where to install administrative programs.
209 rootsbindir = $(exec_prefix)/sbin
211 inst_rootsbindir = $(install_root)$(rootsbindir)
214 sbindir = $(exec_prefix)/sbin
216 inst_sbindir = $(install_root)$(sbindir)
218 # Where to install the Info files.
220 infodir = $(prefix)/info
222 inst_infodir = $(install_root)$(infodir)
224 # Where to install default configuration files. These include the local
225 # timezone specification and network data base files.
227 sysconfdir = $(prefix)/etc
229 inst_sysconfdir = $(install_root)$(sysconfdir)
231 # What timezone should be the installed default (e.g., US/Eastern).
232 # Run `make -C time echo-zonenames' to see a list of available zone names.
233 # The local timezone can be changed with `zic -l TIMEZONE' at any time.
238 # Where to install the "localtime" timezone file; this is the file whose
239 # contents $(localtime) specifies. If this is a relative pathname, it is
240 # relative to $(zonedir). It is a good idea to put this somewhere
241 # other than there, so the zoneinfo directory contains only universal data,
242 # localizing the configuration data elsewhere.
243 ifndef localtime-file
244 localtime-file = $(sysconfdir)/localtime
245 inst_localtime-file = $(install_root)$(localtime-file)
248 # What to use for leap second specifications in compiling the default
249 # timezone files. Set this to `/dev/null' for no leap second handling as
250 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
251 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
252 # This variable determines the default: if it's `/dev/null',
253 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
255 leapseconds = /dev/null
258 # What timezone's DST rules should be used when a POSIX-style TZ
259 # environment variable doesn't specify any rules. For 1003.1 compliance
260 # this timezone must use rules that are as U.S. federal law defines DST.
261 # Run `make -C time echo-zonenames' to see a list of available zone names.
262 # This setting can be changed with `zic -p TIMEZONE' at any time.
263 # If you want POSIX.1 compatibility, use `America/New_York'.
265 posixrules = America/New_York
268 # Where to install the "posixrules" timezone file; this is file
269 # whose contents $(posixrules) specifies. If this is a relative
270 # pathname, it is relative to $(zonedir).
271 ifndef posixrules-file
272 posixrules-file = posixrules
276 # Directory where your system's native header files live.
277 # This is used on Unix systems to generate some GNU libc header files.
279 sysincludedir = /usr/include
283 # Commands to install files.
285 INSTALL_DATA = $(INSTALL) -m 644
287 ifndef INSTALL_PROGRAM
288 INSTALL_PROGRAM = $(INSTALL)
295 # The name of the C compiler.
296 # If you've got GCC, and it works, use it.
297 ifeq ($(origin CC),default)
301 # The name of the C compiler to use for compilations of programs to run on
302 # the host that is building the library. If you set CC to a
303 # cross-compiler, you must set this to the normal compiler.
308 # Default flags to pass the C compiler.
309 ifndef default_cflags
310 default_cflags := -g -O
313 # Flags to pass the C compiler when assembling preprocessed assembly code
314 # (`.S' files). On some systems the assembler doesn't understand the `#' line
315 # directives the preprocessor produces. If you have troubling compiling
316 # assembly code, try using -P here to suppress these directives.
321 # Installed name of the startup code.
323 # When not using ELF, there is just one startfile, called crt0.o.
324 start-installed-name = crt0.o
326 # In the ELF universe, crt0.o is called crt1.o, and there are
327 # some additional bizarre files.
328 start-installed-name = crt1.o
333 # Command for linking programs with the C library.
335 +link = $(CC) -nostdlib -nostartfiles -o $@ \
336 $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) \
337 $(addprefix $(csu-objpfx),$(start-installed-name)) \
338 $(+preinit) $(+prector) \
339 $(filter-out $(addprefix $(csu-objpfx),start.o \
340 $(start-installed-name))\
341 $(+preinit) $(link-extra-libs) \
342 $(common-objpfx)libc% $(+postinit),$^) \
343 $(link-extra-libs) $(link-libc) $(+postctor) $(+postinit)
345 ifndef config-LDFLAGS
346 ifeq (yes,$(build-shared))
347 config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
351 ifeq (yes,$(build-shared))
352 # We need the versioned name of libc.so in the deps of $(others) et al
353 # so that the symlink to libc.so is created before anything tries to
354 # run the linked programs.
355 link-libc = -Wl,-rpath-link=$(rpath-link) \
356 $(common-objpfx)libc.so$(libc.so-version) \
357 $(elfobjdir)/$(rtld-installed-name) \
358 $(common-objpfx)libc.a $(gnulib)
359 # Choose the default search path for the dynamic linker based on
360 # where we will install libraries.
361 ifneq ($(libdir),$(slibdir))
362 default-rpath = $(slibdir):$(libdir)
364 default-rpath = $(libdir)
366 # This is how to find at build-time things that will be installed there.
367 rpath-link = $(common-objdir):$(mathobjdir):$(elfobjdir):$(nssobjdir)
368 mathobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)math)
369 elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf)
370 nssobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)nss)
372 link-libc = $(common-objpfx)libc.a $(gnulib) $(common-objpfx)libc.a
375 ifndef link-extra-libs
376 ifeq (yes,$(build-shared))
377 ifneq ($(common-objpfx),$(objpfx))
378 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),\
379 $(wildcard $(common-objpfx)$(lib).so$($(notdir $(lib)).so-version) \
380 $(objpfx)$(lib).so$($(notdir $(lib)).so-version)))
382 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).so$($(notdir $(lib)).so-version))
385 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).a)
392 +preinit = $(addprefix $(csu-objpfx),crti.o)
393 +postinit = $(addprefix $(csu-objpfx),crtn.o)
394 +prector = `$(CC) --print-file-name=crtbegin.o`
395 +postctor = `$(CC) --print-file-name=crtend.o`
397 csu-objpfx = $(common-objpfx)csu/
398 elf-objpfx = $(common-objpfx)elf/
399 db-objpfx = $(common-objpfx)db/
401 # How to run a program we just linked with our library.
402 # The program binary is assumed to be $(word 2,$^).
403 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
404 ifneq (yes,$(build-shared))
405 built-program-cmd = $(built-program-file)
408 sysdep-library-path = \
409 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
410 $(filter -Wl$(comma)-rpath-link=%,\
411 $(sysdep-LDFLAGS)))))
412 define built-program-cmd
413 LD_LIBRARY_PATH=$(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) \
414 $(elf-objpfx)$(rtld-installed-name) $(built-program-file)
426 # Extra flags to pass to GCC.
427 +gccwarn := -Wall -Wwrite-strings -Wno-parentheses -Winline -Wstrict-prototypes
429 # This is the program that generates makefile
430 # dependencies from C source files.
435 # The program that makes Emacs-style TAGS files.
438 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
439 # perhaps others) to preprocess assembly code in some cases.
443 #### End of configuration variables.
446 # This tells some versions of GNU make before 3.63 not to export all variables.
449 # We want to echo the commands we're running without
450 # umpteen zillion filenames along with it (we use `...' instead)
451 # but we don't want this echoing done when the user has said
452 # he doesn't want to see commands echoed by using -s.
453 ifneq "$(findstring s,$(MAKEFLAGS))" "" # if -s
454 +cmdecho := echo >/dev/null
459 # These are the flags given to the compiler to tell
460 # it what sort of optimization and/or debugging output to do.
462 # If `CFLAGS' was defined, use that.
464 +cflags := $(filter-out -I%,$(CFLAGS))
468 # If none of the above worked, default to "-g -O".
469 ifeq "$(strip $(+cflags))" ""
470 +cflags := $(default_cflags)
471 endif # $(+cflags) == ""
473 +cflags := $(+cflags) $(+gccwarn)
476 # Don't duplicate options if we inherited variables from the parent.
477 +cflags := $(sort $(+cflags))
480 # These are flags given to the C compiler to tell it to look for include
481 # files (including ones given in angle brackets) in the current directory
482 # and in the parent library source directory.
483 # `+sysdep-includes' will be defined by Makerules.
484 +includes = -I. $(filter-out -I,-I$(patsubst %/,%,$(..))) $($(stdio)-include) \
485 $(includes) $(+sysdep-includes) $(last-includes)
487 # Since libio has several internal header files, we use a -I instead
488 # of many little headers in the top level source directory.
489 libio-include = -I$(..)libio
491 # These are the variables that the implicit compilation rules use.
492 CPPFLAGS = $(+includes) $(defines) -include $(..)libc-symbols.h \
493 $(sysdep-CPPFLAGS) $(CPPFLAGS-$(suffix $@)) $(CPPFLAGS-$(<F)) \
495 override CFLAGS = $(+cflags) $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) \
496 $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
499 # This is the macro that the implicit linking rules use.
500 ifneq "$(filter -g,$(+cflags))" "" # -g is in $(+cflags)
505 # Enable object files for different versions of the library.
506 # Various things use $(object-suffixes) to know what all to make.
507 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
508 # to pass different flags for each flavor.
509 libtypes = $(foreach o,$(object-suffixes),$(libtype$o))
510 object-suffixes := .o
511 all-object-suffixes := .o .so .po .go .bo
513 ifeq (yes,$(build-shared))
514 # Under --enable-shared, we will build a shared library of PIC objects.
515 # The PIC object files are named foo.so.
516 object-suffixes += .so
518 CFLAGS-.so = -fPIC -fno-common
519 libtype.so := lib%_pic.a
521 ifeq (yes,$(build-profile))
522 # Under --enable-profile, we will build a static library of profiled objects.
523 # The profiled object files are named foo.po.
524 object-suffixes += .po
525 CPPFLAGS-.po = -DPROF
527 libtype.po = lib%_p.a
529 ifeq (yes,$(build-omitfp))
530 # Under --enable-omitfp, we build an the library optimized without
531 # debugging information using -fomit-frame-pointer, and build an extra
532 # library with debugging information. The debuggable objects are named foo.go.
533 object-suffixes += .go
535 CFLAGS-.o = -g0 -O99 -fomit-frame-pointer
536 CFLAGS-.so += $(CFLAGS-.o)
537 libtype.go = lib%_g.a
539 ifeq (yes,$(build-bounded))
540 # Under --enable-bounded, we build the library with `-fbounded-pointers -g'
541 # to runtime bounds checking. The bounded-pointer objects are named foo.bo.
542 object-suffixes += .bo
543 CPPFLAGS-.bo = -DBOUNDED_POINTERS
544 CFLAGS-.bo = -g -fbounded-pointers
545 libtype.bo = lib%_b.a
549 +gnu-stabs = $(shell echo>&2 '*** BARF ON ME')
555 # Figure out the version numbers from version.h.
557 $(common-objpfx)version.mk: $(..)version.h $(..)Makeconfig
558 sed -n -e 's/^.*RELEASE.*"\([^"]*\)".*$$/release=\1/p' \
559 -e 's/^.*VERSION.*"\([^"]*\)".*$$/version=\1/p' \
563 ifeq (yes, $(build-shared))
565 # Process the shlib-versions file, which tells us what shared library
566 # version numbers to use when we install shared objects on this system.
567 -include $(common-objpfx)soversions.mk
568 $(common-objpfx)soversions.mk: $(..)shlib-versions $(..)Makeconfig \
569 $(wildcard $(patsubst %, $(..)%/shlib-versions,\
571 $(common-objpfx)config.make
572 (file="$(wildcard $(patsubst %,$(..)%/shlib-versions,$(add-ons))) \
573 $(..)shlib-versions"; \
574 for f in $$file; do \
575 sed 's/#.*$$//' $$f | while read conf versions; do \
576 test -n "$$versions" && \
577 test `expr '$(config-machine)-$(config-vendor)-$(config-os)' \
578 : "$$conf"` != 0 || continue; \
579 for v in $$versions; do \
580 lib=`echo $$v | sed 's/=.*$$//'`; \
581 if eval "test -z \"\$$vers_lib$$lib\""; then \
582 eval vers_lib$${lib}=yes; \
583 number=`echo $$v | sed "s/^.*=//"`; \
585 [0-9]*) echo "$$lib.so-version=.$$number"; \
586 echo "all-sonames+=$$lib.so\$$($$lib.so-version)";;\
587 *) echo "$$lib.so-version=$$number"; \
588 echo "all-sonames+=\$$($$lib.so-version)";; \
596 # Get $(version) defined with the release version number.
597 -include $(common-objpfx)version.mk
599 # Generate the header containing the names of all shared libraries.
600 # We use a stamp file to avoid uncessary recompilations.
601 before-compile += $(common-objpfx)gnu/lib-names.h
602 $(common-objpfx)gnu/lib-names.h: $(common-objpfx)gnu/lib-names.stmp
603 $(common-objpfx)gnu/lib-names.stmp: $(common-objpfx)soversions.mk
604 $(make-target-directory)
605 @rm -f ${@:stmp=T} $@
606 (echo '/* This file is automatically generated.';\
607 echo ' It defines macros to allow user program to find the shared';\
608 echo ' library files which come as part of GNU libc. */';\
609 echo '#ifndef __GNU_LIB_NAMES_H'; \
610 echo '#define __GNU_LIB_NAMES_H 1'; \
612 (libs='$(all-sonames)';\
613 for l in $$libs; do \
614 upname=`echo $$l | sed 's/[.]so.*//' | \
615 tr 'abcdefghijklmnopqrstuvwxyz-' \
616 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`; \
617 echo "#define $${upname}_SO \"$$l\""; \
620 echo '#endif /* gnu/lib-names.h */';) > ${@:stmp=T}
621 if test -r ${@:stmp=h} && cmp -s ${@:stmp=h} ${@:stmp=T}; \
622 then rm -f ${@:stmp=T}; \
623 else mv -f ${@:stmp=T} ${@:stmp=h}; fi
626 common-generated += gnu/lib-names.h gnu/lib-names.stmp
628 # The name under which the run-time dynamic linker is installed.
629 # We are currently going for the convention that `/lib/ld.so.1'
630 # names the SVR4/ELF ABI-compliant dynamic linker.
631 ifndef rtld-installed-name
633 rtld-installed-name = $(ld.so-version)
635 rtld-installed-name = ld.so.1
639 ifndef rtld-version-installed-name
640 rtld-version-installed-name = ld-$(version).so
645 endif # Makeconfig not yet included