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.
94 # Complete path to sysdep dirs.
95 full-config-sysdirs := $(filter /%, $(config-sysdirs)) \
96 $(addprefix $(..), $(filter-out /%, $(config-sysdirs)))
97 export full-config-sysdirs := $(full-config-sysdirs)
99 # Run config.status to update config.make and config.h. We don't show the
100 # dependence of config.h to Make, because it is only touched when it
101 # changes and so config.status would be run every time; the dependence of
102 # config.make should suffice to force regeneration and re-exec, and the new
103 # image will notice if config.h changed.
104 $(common-objpfx)config.make: $(common-objpfx)config.status \
105 $(..)config.make.in $(..)config.h.in
106 cd $(<D); $(SHELL) $(<F)
108 # Find all the sysdeps configure fragments, to make sure we re-run
109 # configure when any of them changes.
110 $(common-objpfx)config.status: $(..)version.h $(..)configure \
111 $(foreach dir,$(full-config-sysdirs),\
115 $(firstword $(wildcard \
116 $(addprefix $(dir)/,configure configure.in)))))
117 @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
118 echo The GNU C library has not been configured. >&2; \
119 echo Run \`configure\' to configure it before building. >&2; \
120 echo Try \`configure --help\' for more details. >&2; \
123 # Get the user's configuration parameters.
124 ifneq ($(wildcard $(..)configparms),)
125 include $(..)configparms
128 ifneq ($(wildcard $(common-objpfx)configparms),)
129 include $(common-objpfx)configparms
134 #### These are the configuration variables. You can define values for
135 #### the variables below in the file `configparms'.
136 #### Do NOT edit this file.
140 # Set this to either `stdio' or `libio', to compile in either GNU stdio
146 # Common prefix for machine-independent installation directories.
147 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
151 # Common prefix for machine-dependent installation directories.
152 ifeq ($(origin exec_prefix),undefined)
153 exec_prefix = $(prefix)
156 # Where to install the library and object files.
158 libdir = $(exec_prefix)/lib
160 inst_libdir = $(install_root)$(libdir)
162 # Where to install the shared library and dynamic linker.
164 slibdir = $(exec_prefix)/lib
166 inst_slibdir = $(install_root)$(slibdir)
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 = $(exec_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 locale and message catalog data files (which are
196 # machine-independent).
198 localedir = $(datadir)/locale
200 inst_localedir = $(install_root)$(localedir)
202 # Where to install the locale charmap source files.
204 i18ndir = $(datadir)/i18n
206 inst_i18ndir = $(install_root)$(i18ndir)
209 # Where to install programs.
211 bindir = $(exec_prefix)/bin
213 inst_bindir = $(install_root)$(bindir)
215 # Where to install administrative programs.
217 rootsbindir = $(exec_prefix)/sbin
219 inst_rootsbindir = $(install_root)$(rootsbindir)
222 sbindir = $(exec_prefix)/sbin
224 inst_sbindir = $(install_root)$(sbindir)
226 # Where to install the Info files.
228 infodir = $(prefix)/info
230 inst_infodir = $(install_root)$(infodir)
232 # Where to install default configuration files. These include the local
233 # timezone specification and network data base files.
235 sysconfdir = $(prefix)/etc
237 inst_sysconfdir = $(install_root)$(sysconfdir)
239 # What timezone should be the installed default (e.g., US/Eastern).
240 # Run `make -C time echo-zonenames' to see a list of available zone names.
241 # The local timezone can be changed with `zic -l TIMEZONE' at any time.
246 # Where to install the "localtime" timezone file; this is the file whose
247 # contents $(localtime) specifies. If this is a relative pathname, it is
248 # relative to $(zonedir). It is a good idea to put this somewhere
249 # other than there, so the zoneinfo directory contains only universal data,
250 # localizing the configuration data elsewhere.
251 ifndef localtime-file
252 localtime-file = $(sysconfdir)/localtime
253 inst_localtime-file = $(install_root)$(localtime-file)
256 # What to use for leap second specifications in compiling the default
257 # timezone files. Set this to `/dev/null' for no leap second handling as
258 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
259 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
260 # This variable determines the default: if it's `/dev/null',
261 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
263 leapseconds = /dev/null
266 # What timezone's DST rules should be used when a POSIX-style TZ
267 # environment variable doesn't specify any rules. For 1003.1 compliance
268 # this timezone must use rules that are as U.S. federal law defines DST.
269 # Run `make -C time echo-zonenames' to see a list of available zone names.
270 # This setting can be changed with `zic -p TIMEZONE' at any time.
271 # If you want POSIX.1 compatibility, use `America/New_York'.
273 posixrules = America/New_York
276 # Where to install the "posixrules" timezone file; this is file
277 # whose contents $(posixrules) specifies. If this is a relative
278 # pathname, it is relative to $(zonedir).
279 ifndef posixrules-file
280 posixrules-file = posixrules
284 # Directory where your system's native header files live.
285 # This is used on Unix systems to generate some GNU libc header files.
287 sysincludedir = /usr/include
291 # Commands to install files.
293 INSTALL_DATA = $(INSTALL) -m 644
295 ifndef INSTALL_PROGRAM
296 INSTALL_PROGRAM = $(INSTALL)
303 # The name of the C compiler.
304 # If you've got GCC, and it works, use it.
305 ifeq ($(origin CC),default)
309 # The name of the C compiler to use for compilations of programs to run on
310 # the host that is building the library. If you set CC to a
311 # cross-compiler, you must set this to the normal compiler.
316 # Default flags to pass the C compiler.
317 ifndef default_cflags
318 default_cflags := -g -O
321 # Flags to pass the C compiler when assembling preprocessed assembly code
322 # (`.S' files). On some systems the assembler doesn't understand the `#' line
323 # directives the preprocessor produces. If you have troubling compiling
324 # assembly code, try using -P here to suppress these directives.
329 # Installed name of the startup code.
331 # When not using ELF, there is just one startfile, called crt0.o.
332 start-installed-name = crt0.o
334 # In the ELF universe, crt0.o is called crt1.o, and there are
335 # some additional bizarre files.
336 start-installed-name = crt1.o
341 # Command for linking programs with the C library.
343 +link = $(CC) -nostdlib -nostartfiles -o $@ \
344 $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) \
345 $(addprefix $(csu-objpfx),$(start-installed-name)) \
346 $(+preinit) $(+prector) \
347 $(filter-out $(addprefix $(csu-objpfx),start.o \
348 $(start-installed-name))\
349 $(+preinit) $(link-extra-libs) \
350 $(common-objpfx)libc% $(+postinit),$^) \
351 $(link-extra-libs) $(link-libc) $(+postctor) $(+postinit)
353 ifndef config-LDFLAGS
354 ifeq (yes,$(build-shared))
355 config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
359 ifeq (yes,$(build-shared))
360 # We need the versioned name of libc.so in the deps of $(others) et al
361 # so that the symlink to libc.so is created before anything tries to
362 # run the linked programs.
363 link-libc = -Wl,-rpath-link=$(rpath-link) \
364 $(common-objpfx)libc.so$(libc.so-version) \
365 $(elfobjdir)/$(rtld-installed-name) \
366 $(common-objpfx)libc.a $(gnulib)
367 # Choose the default search path for the dynamic linker based on
368 # where we will install libraries.
369 ifneq ($(libdir),$(slibdir))
370 default-rpath = $(slibdir):$(libdir)
372 default-rpath = $(libdir)
374 # This is how to find at build-time things that will be installed there.
375 rpath-link = $(common-objdir):$(mathobjdir):$(elfobjdir):$(nssobjdir):$(dbobjdir)
376 mathobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)math)
377 elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf)
378 nssobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)nss)
379 dbobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)db)
381 link-libc = $(common-objpfx)libc.a $(gnulib) $(common-objpfx)libc.a
385 ifndef link-extra-libs
386 ifeq (yes,$(build-shared))
387 ifneq ($(common-objpfx),$(objpfx))
388 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),\
389 $(wildcard $(common-objpfx)$(lib).so$($(notdir $(lib)).so-version) \
390 $(objpfx)$(lib).so$($(notdir $(lib)).so-version)))
392 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).so$($(notdir $(lib)).so-version))
395 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).a)
402 +preinit = $(addprefix $(csu-objpfx),crti.o)
403 +postinit = $(addprefix $(csu-objpfx),crtn.o)
404 +prector = `$(CC) --print-file-name=crtbegin.o`
405 +postctor = `$(CC) --print-file-name=crtend.o`
407 csu-objpfx = $(common-objpfx)csu/
408 elf-objpfx = $(common-objpfx)elf/
409 db-objpfx = $(common-objpfx)db/
411 # How to run a program we just linked with our library.
412 # The program binary is assumed to be $(word 2,$^).
413 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
414 ifneq (yes,$(build-shared))
415 built-program-cmd = $(built-program-file)
418 sysdep-library-path = \
419 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
420 $(filter -Wl$(comma)-rpath-link=%,\
421 $(sysdep-LDFLAGS)))))
422 define built-program-cmd
423 LD_LIBRARY_PATH=$(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) \
424 $(elf-objpfx)$(rtld-installed-name) $(built-program-file)
436 # Extra flags to pass to GCC.
437 +gccwarn := -Wall -Wwrite-strings -Wno-parentheses -Winline -Wstrict-prototypes
439 # This is the program that generates makefile
440 # dependencies from C source files.
445 # The program that makes Emacs-style TAGS files.
448 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
449 # perhaps others) to preprocess assembly code in some cases.
453 #### End of configuration variables.
456 # This tells some versions of GNU make before 3.63 not to export all variables.
459 # We want to echo the commands we're running without
460 # umpteen zillion filenames along with it (we use `...' instead)
461 # but we don't want this echoing done when the user has said
462 # he doesn't want to see commands echoed by using -s.
463 ifneq "$(findstring s,$(MAKEFLAGS))" "" # if -s
464 +cmdecho := echo >/dev/null
469 # These are the flags given to the compiler to tell
470 # it what sort of optimization and/or debugging output to do.
472 # If `CFLAGS' was defined, use that.
474 +cflags := $(filter-out -I%,$(CFLAGS))
478 # If none of the above worked, default to "-g -O".
479 ifeq "$(strip $(+cflags))" ""
480 +cflags := $(default_cflags)
481 endif # $(+cflags) == ""
483 +cflags := $(+cflags) $(+gccwarn)
486 # Don't duplicate options if we inherited variables from the parent.
487 +cflags := $(sort $(+cflags))
490 # These are flags given to the C compiler to tell it to look for include
491 # files (including ones given in angle brackets) in the current directory,
492 # in the parent library source directory and in the include directory.
493 # `+sysdep-includes' will be defined by Makerules.
494 +includes = -I. $(patsubst %/,-I%,$(..)) -I$(..)include $($(stdio)-include) \
495 $(includes) $(+sysdep-includes) $(last-includes)
497 # Since libio has several internal header files, we use a -I instead
498 # of many little headers in the include directory.
499 libio-include = -I$(..)libio
501 # These are the variables that the implicit compilation rules use.
502 CPPFLAGS = $(+includes) $(defines) -include $(..)include/libc-symbols.h \
503 $(sysdep-CPPFLAGS) $(CPPFLAGS-$(suffix $@)) $(CPPFLAGS-$(<F)) \
505 override CFLAGS = $(+cflags) $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) \
506 $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
509 # This is the macro that the implicit linking rules use.
510 ifneq "$(filter -g,$(+cflags))" "" # -g is in $(+cflags)
515 # Enable object files for different versions of the library.
516 # Various things use $(object-suffixes) to know what all to make.
517 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
518 # to pass different flags for each flavor.
519 libtypes = $(foreach o,$(object-suffixes),$(libtype$o))
520 object-suffixes := .o
521 all-object-suffixes := .o .so .po .go .bo
523 ifeq (yes,$(build-shared))
524 # Under --enable-shared, we will build a shared library of PIC objects.
525 # The PIC object files are named foo.so.
526 object-suffixes += .so
528 CFLAGS-.so = -fPIC -fno-common
529 libtype.so := lib%_pic.a
531 ifeq (yes,$(build-profile))
532 # Under --enable-profile, we will build a static library of profiled objects.
533 # The profiled object files are named foo.po.
534 object-suffixes += .po
535 CPPFLAGS-.po = -DPROF
537 libtype.po = lib%_p.a
539 ifeq (yes,$(build-omitfp))
540 # Under --enable-omitfp, we build an the library optimized without
541 # debugging information using -fomit-frame-pointer, and build an extra
542 # library with debugging information. The debuggable objects are named foo.go.
543 object-suffixes += .go
545 CFLAGS-.o = -g0 -O99 -fomit-frame-pointer
546 CFLAGS-.so += $(CFLAGS-.o)
547 libtype.go = lib%_g.a
549 ifeq (yes,$(build-bounded))
550 # Under --enable-bounded, we build the library with `-fbounded-pointers -g'
551 # to runtime bounds checking. The bounded-pointer objects are named foo.bo.
552 object-suffixes += .bo
553 CPPFLAGS-.bo = -DBOUNDED_POINTERS
554 CFLAGS-.bo = -g -fbounded-pointers
555 libtype.bo = lib%_b.a
559 +gnu-stabs = $(shell echo>&2 '*** BARF ON ME')
565 # Figure out the version numbers from version.h.
567 $(common-objpfx)version.mk: $(..)version.h $(..)Makeconfig
568 sed -n -e 's/^.*RELEASE.*"\([^"]*\)".*$$/release=\1/p' \
569 -e 's/^.*VERSION.*"\([^"]*\)".*$$/version=\1/p' \
573 ifeq (yes, $(build-shared))
575 # Process the shlib-versions file, which tells us what shared library
576 # version numbers to use when we install shared objects on this system.
577 -include $(common-objpfx)soversions.mk
578 $(common-objpfx)soversions.mk: $(..)shlib-versions $(..)Makeconfig \
579 $(wildcard $(patsubst %, $(..)%/shlib-versions,\
581 $(common-objpfx)config.make
582 (file="$(wildcard $(patsubst %,$(..)%/shlib-versions,$(add-ons))) \
583 $(..)shlib-versions"; \
584 for f in $$file; do \
585 sed 's/#.*$$//' $$f | while read conf versions; do \
586 test -n "$$versions" && \
587 test `expr '$(config-machine)-$(config-vendor)-$(config-os)' \
588 : "$$conf"` != 0 || continue; \
589 for v in $$versions; do \
590 lib=`echo $$v | sed 's/=.*$$//'`; \
591 if eval "test -z \"\$$vers_lib$$lib\""; then \
592 eval vers_lib$${lib}=yes; \
593 number=`echo $$v | sed "s/^.*=//"`; \
595 [0-9]*) echo "$$lib.so-version=.$$number"; \
596 echo "all-sonames+=$$lib.so\$$($$lib.so-version)";;\
597 *) echo "$$lib.so-version=$$number"; \
598 echo "all-sonames+=\$$($$lib.so-version)";; \
606 # Get $(version) defined with the release version number.
607 -include $(common-objpfx)version.mk
609 # Generate the header containing the names of all shared libraries.
610 # We use a stamp file to avoid uncessary recompilations.
611 before-compile += $(common-objpfx)gnu/lib-names.h
612 $(common-objpfx)gnu/lib-names.h: $(common-objpfx)gnu/lib-names.stmp
613 $(common-objpfx)gnu/lib-names.stmp: $(common-objpfx)soversions.mk
614 $(make-target-directory)
615 @rm -f ${@:stmp=T} $@
616 (echo '/* This file is automatically generated.';\
617 echo ' It defines macros to allow user program to find the shared';\
618 echo ' library files which come as part of GNU libc. */';\
619 echo '#ifndef __GNU_LIB_NAMES_H'; \
620 echo '#define __GNU_LIB_NAMES_H 1'; \
622 (libs='$(all-sonames)';\
623 for l in $$libs; do \
624 upname=`echo $$l | sed 's/[.]so.*//' | \
625 tr 'abcdefghijklmnopqrstuvwxyz-' \
626 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`; \
627 echo "#define $${upname}_SO \"$$l\""; \
630 echo '#endif /* gnu/lib-names.h */';) > ${@:stmp=T}
631 if test -r ${@:stmp=h} && cmp -s ${@:stmp=h} ${@:stmp=T}; \
632 then rm -f ${@:stmp=T}; \
633 else mv -f ${@:stmp=T} ${@:stmp=h}; fi
636 common-generated += gnu/lib-names.h gnu/lib-names.stmp
638 # The name under which the run-time dynamic linker is installed.
639 # We are currently going for the convention that `/lib/ld.so.1'
640 # names the SVR4/ELF ABI-compliant dynamic linker.
641 ifndef rtld-installed-name
643 rtld-installed-name = $(ld.so-version)
645 rtld-installed-name = ld.so.1
649 ifndef rtld-version-installed-name
650 rtld-version-installed-name = ld-$(version).so
655 endif # Makeconfig not yet included