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)
220 # Where to install the shared object for charset transformation.
222 gconvdir = $(libdir)/gconv
224 inst_gconvdir = $(install_root)$(gconvdir)
227 # Where to install programs.
229 bindir = $(exec_prefix)/bin
231 inst_bindir = $(install_root)$(bindir)
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 default configuration files. These include the local
251 # timezone specification and network data base files.
253 sysconfdir = $(prefix)/etc
255 inst_sysconfdir = $(install_root)$(sysconfdir)
257 # What timezone should be the installed default (e.g., US/Eastern).
258 # Run `make -C time echo-zonenames' to see a list of available zone names.
259 # The local timezone can be changed with `zic -l TIMEZONE' at any time.
264 # Where to install the "localtime" timezone file; this is the file whose
265 # contents $(localtime) specifies. If this is a relative pathname, it is
266 # relative to $(zonedir). It is a good idea to put this somewhere
267 # other than there, so the zoneinfo directory contains only universal data,
268 # localizing the configuration data elsewhere.
269 ifndef localtime-file
270 localtime-file = $(sysconfdir)/localtime
271 inst_localtime-file = $(install_root)$(localtime-file)
274 # What to use for leap second specifications in compiling the default
275 # timezone files. Set this to `/dev/null' for no leap second handling as
276 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
277 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
278 # This variable determines the default: if it's `/dev/null',
279 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
281 leapseconds = /dev/null
284 # What timezone's DST rules should be used when a POSIX-style TZ
285 # environment variable doesn't specify any rules. For 1003.1 compliance
286 # this timezone must use rules that are as U.S. federal law defines DST.
287 # Run `make -C time echo-zonenames' to see a list of available zone names.
288 # This setting can be changed with `zic -p TIMEZONE' at any time.
289 # If you want POSIX.1 compatibility, use `America/New_York'.
291 posixrules = America/New_York
294 # Where to install the "posixrules" timezone file; this is file
295 # whose contents $(posixrules) specifies. If this is a relative
296 # pathname, it is relative to $(zonedir).
297 ifndef posixrules-file
298 posixrules-file = posixrules
302 # Directory where your system's native header files live.
303 # This is used on Unix systems to generate some GNU libc header files.
305 sysincludedir = /usr/include
309 # Commands to install files.
311 INSTALL_DATA = $(INSTALL) -m 644
313 ifndef INSTALL_PROGRAM
314 INSTALL_PROGRAM = $(INSTALL)
321 # The name of the C compiler.
322 # If you've got GCC, and it works, use it.
323 ifeq ($(origin CC),default)
327 # The name of the C compiler to use for compilations of programs to run on
328 # the host that is building the library. If you set CC to a
329 # cross-compiler, you must set this to the normal compiler.
334 # Default flags to pass the C compiler.
335 ifndef default_cflags
336 default_cflags := -g -O
339 # Flags to pass the C compiler when assembling preprocessed assembly code
340 # (`.S' files). On some systems the assembler doesn't understand the `#' line
341 # directives the preprocessor produces. If you have troubling compiling
342 # assembly code, try using -P here to suppress these directives.
347 # ELF always supports init/fini sections
352 # Installed name of the startup code.
353 ifneq ($(have-initfini),yes)
354 # When not having init/fini, there is just one startfile, called crt0.o.
355 start-installed-name = crt0.o
357 # On systems having init/fini, crt0.o is called crt1.o, and there are
358 # some additional bizarre files.
359 start-installed-name = crt1.o
363 # Command for linking programs with the C library.
365 +link = $(CC) -nostdlib -nostartfiles -o $@ \
366 $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) \
367 $(addprefix $(csu-objpfx),$(start-installed-name)) \
368 $(+preinit) $(+prector) \
369 $(filter-out $(addprefix $(csu-objpfx),start.o \
370 $(start-installed-name))\
371 $(+preinit) $(link-extra-libs) \
372 $(common-objpfx)libc% $(+postinit),$^) \
373 $(link-extra-libs) $(link-libc) $(+postctor) $(+postinit)
375 ifndef config-LDFLAGS
376 ifeq (yes,$(build-shared))
377 config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
381 ifeq (yes,$(build-shared))
382 # We need the versioned name of libc.so in the deps of $(others) et al
383 # so that the symlink to libc.so is created before anything tries to
384 # run the linked programs.
385 link-libc = -Wl,-rpath-link=$(rpath-link) \
386 $(common-objpfx)libc.so$(libc.so-version) \
387 $(elfobjdir)/$(rtld-installed-name) \
388 $(common-objpfx)libc.a $(gnulib)
389 # Choose the default search path for the dynamic linker based on
390 # where we will install libraries.
391 ifneq ($(libdir),$(slibdir))
392 default-rpath = $(slibdir):$(libdir)
394 default-rpath = $(libdir)
396 # This is how to find at build-time things that will be installed there.
397 rpath-link = $(common-objdir):$(mathobjdir):$(elfobjdir):$(nssobjdir):$(dbobjdir)
398 mathobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)math)
399 elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf)
400 nssobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)nss)
401 dbobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)db2)
403 link-libc = $(common-objpfx)libc.a $(gnulib) $(common-objpfx)libc.a
407 ifndef link-extra-libs
408 ifeq (yes,$(build-shared))
409 ifneq ($(common-objpfx),$(objpfx))
410 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),\
411 $(wildcard $(common-objpfx)$(lib).so$($(notdir $(lib)).so-version) \
412 $(objpfx)$(lib).so$($(notdir $(lib)).so-version)))
414 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).so$($(notdir $(lib)).so-version))
417 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).a)
424 +preinit = $(addprefix $(csu-objpfx),crti.o)
425 +postinit = $(addprefix $(csu-objpfx),crtn.o)
426 +prector = `$(CC) --print-file-name=crtbegin.o`
427 +postctor = `$(CC) --print-file-name=crtend.o`
429 csu-objpfx = $(common-objpfx)csu/
430 elf-objpfx = $(common-objpfx)elf/
431 db-objpfx = $(common-objpfx)db/
433 # How to run a program we just linked with our library.
434 # The program binary is assumed to be $(word 2,$^).
435 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
436 ifneq (yes,$(build-shared))
437 built-program-cmd = $(built-program-file)
440 sysdep-library-path = \
441 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
442 $(filter -Wl$(comma)-rpath-link=%,\
443 $(sysdep-LDFLAGS)))))
444 define built-program-cmd
445 LD_LIBRARY_PATH=$(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) \
446 $(elf-objpfx)$(rtld-installed-name) $(built-program-file)
458 # Extra flags to pass to GCC.
459 +gccwarn := -Wall -Wwrite-strings -Wno-parentheses -Winline -Wstrict-prototypes
461 # This is the program that generates makefile
462 # dependencies from C source files.
467 # The program that makes Emacs-style TAGS files.
470 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
471 # perhaps others) to preprocess assembly code in some cases.
475 #### End of configuration variables.
478 # This tells some versions of GNU make before 3.63 not to export all variables.
481 # We want to echo the commands we're running without
482 # umpteen zillion filenames along with it (we use `...' instead)
483 # but we don't want this echoing done when the user has said
484 # he doesn't want to see commands echoed by using -s.
485 ifneq "$(findstring s,$(MAKEFLAGS))" "" # if -s
486 +cmdecho := echo >/dev/null
491 # These are the flags given to the compiler to tell
492 # it what sort of optimization and/or debugging output to do.
494 # If `CFLAGS' was defined, use that.
496 +cflags := $(filter-out -I%,$(CFLAGS))
500 # If none of the above worked, default to "-g -O".
501 ifeq "$(strip $(+cflags))" ""
502 +cflags := $(default_cflags)
503 endif # $(+cflags) == ""
505 +cflags := $(+cflags) $(+gccwarn)
508 # Don't duplicate options if we inherited variables from the parent.
509 +cflags := $(sort $(+cflags))
512 # These are flags given to the C compiler to tell it to look for include
513 # files (including ones given in angle brackets) in the current directory,
514 # in the parent library source directory and in the include directory.
515 # `+sysdep-includes' will be defined by Makerules.
516 +includes = -I. $(patsubst %/,-I%,$(objpfx)) $(patsubst %/,-I%,$(..)) \
517 -I$(..)include $($(stdio)-include) $(includes) \
518 $(+sysdep-includes) $(last-includes)
520 # Since libio has several internal header files, we use a -I instead
521 # of many little headers in the include directory.
522 libio-include = -I$(..)libio
524 # These are the variables that the implicit compilation rules use.
525 CPPFLAGS = $(+includes) $(defines) -include $(..)include/libc-symbols.h \
526 $(sysdep-CPPFLAGS) $(CPPFLAGS-$(suffix $@)) $(CPPFLAGS-$(<F)) \
528 override CFLAGS = $(+cflags) $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) \
529 $(CFLAGS-$(<F)) $(CFLAGS-$(@F))
532 # This is the macro that the implicit linking rules use.
533 ifneq "$(filter -g,$(+cflags))" "" # -g is in $(+cflags)
538 # If everything is compiled with -fPIC (implicitly) we must tell this by
539 # defining the PIC symbol.
540 ifeq (yes,$(build-pic-default))
544 # Enable object files for different versions of the library.
545 # Various things use $(object-suffixes) to know what all to make.
546 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
547 # to pass different flags for each flavor.
548 libtypes = $(foreach o,$(object-suffixes),$(libtype$o))
549 all-object-suffixes := .o .os .op .og .ob
551 ifeq (yes,$(build-static))
552 CPPFLAGS-.o = $(pic-default)
554 object-suffixes += .o
556 ifeq (yes,$(build-shared))
557 # Under --enable-shared, we will build a shared library of PIC objects.
558 # The PIC object files are named foo.os.
559 object-suffixes += .os
561 CFLAGS-.os = $(pic-ccflag) -fno-common
562 libtype.os := lib%_pic.a
563 # This can be changed by a sysdep makefile
566 ifeq (yes,$(build-profile))
567 # Under --enable-profile, we will build a static library of profiled objects.
568 # The profiled object files are named foo.op.
569 object-suffixes += .op
570 CPPFLAGS-.op = -DPROF $(pic-default)
572 libtype.op = lib%_p.a
574 ifeq (yes,$(build-omitfp))
575 # Under --enable-omitfp, we build an the library optimized without
576 # debugging information using -fomit-frame-pointer, and build an extra
577 # library with debugging information. The debuggable objects are named foo.og.
578 object-suffixes += .og
579 CPPFLAGS-.og = $(pic-default)
581 CFLAGS-.o = -g0 -O99 -fomit-frame-pointer -D__USE_STRING_INLINES
582 CFLAGS-.os += $(CFLAGS-.o)
583 libtype.og = lib%_g.a
585 ifeq (yes,$(build-bounded))
586 # Under --enable-bounded, we build the library with `-fbounded-pointers -g'
587 # to runtime bounds checking. The bounded-pointer objects are named foo.ob.
588 object-suffixes += .ob
589 CPPFLAGS-.ob = -DBOUNDED_POINTERS $(pic-default)
590 CFLAGS-.ob = -g -fbounded-pointers
591 libtype.ob = lib%_b.a
595 +gnu-stabs = $(shell echo>&2 '*** BARF ON ME')
601 # Figure out the version numbers from version.h.
603 $(common-objpfx)version.mk: $(..)version.h $(..)Makeconfig
604 sed -n -e 's/^.*RELEASE.*"\([^"]*\)".*$$/release=\1/p' \
605 -e 's/^.*VERSION.*"\([^"]*\)".*$$/version=\1/p' \
609 common-generated += version.mk
611 ifeq (yes, $(build-shared))
613 # Process the shlib-versions file, which tells us what shared library
614 # version numbers to use when we install shared objects on this system.
615 -include $(common-objpfx)soversions.mk
616 $(common-objpfx)soversions.mk: $(..)shlib-versions $(..)Makeconfig \
617 $(wildcard $(patsubst %, $(..)%/shlib-versions,\
619 $(common-objpfx)config.make
620 (file="$(wildcard $(patsubst %,$(..)%/shlib-versions,$(add-ons))) \
621 $(..)shlib-versions"; \
622 for f in $$file; do \
623 sed 's/#.*$$//' $$f | while read conf versions; do \
624 test -n "$$versions" && \
625 test `expr '$(config-machine)-$(config-vendor)-$(config-os)' \
626 : "$$conf"` != 0 || continue; \
627 for v in $$versions; do \
628 lib=`echo $$v | sed 's/=.*$$//'`; \
629 if eval "test -z \"\$$vers_lib$$lib\""; then \
630 eval vers_lib$${lib}=yes; \
631 number=`echo $$v | sed "s/^.*=//"`; \
633 [0-9]*) echo "$$lib.so-version=.$$number"; \
634 echo "all-sonames+=$$lib.so\$$($$lib.so-version)";;\
635 *) echo "$$lib.so-version=$$number"; \
636 echo "all-sonames+=\$$($$lib.so-version)";; \
644 # Get $(version) defined with the release version number.
645 -include $(common-objpfx)version.mk
647 # Generate the header containing the names of all shared libraries.
648 # We use a stamp file to avoid uncessary recompilations.
649 before-compile += $(common-objpfx)gnu/lib-names.h
650 $(common-objpfx)gnu/lib-names.h: $(common-objpfx)gnu/lib-names.stmp
651 $(common-objpfx)gnu/lib-names.stmp: $(common-objpfx)soversions.mk
652 $(make-target-directory)
653 @rm -f ${@:stmp=T} $@
654 (echo '/* This file is automatically generated.';\
655 echo ' It defines macros to allow user program to find the shared';\
656 echo ' library files which come as part of GNU libc. */';\
657 echo '#ifndef __GNU_LIB_NAMES_H'; \
658 echo '#define __GNU_LIB_NAMES_H 1'; \
660 (libs='$(all-sonames)';\
661 for l in $$libs; do \
662 upname=`echo $$l | sed 's/[.]so.*//' | \
663 tr 'abcdefghijklmnopqrstuvwxyz-' \
664 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`; \
665 echo "#define $${upname}_SO \"$$l\""; \
668 echo '#endif /* gnu/lib-names.h */';) > ${@:stmp=T}
669 if test -r ${@:stmp=h} && cmp -s ${@:stmp=h} ${@:stmp=T}; \
670 then rm -f ${@:stmp=T}; \
671 else mv -f ${@:stmp=T} ${@:stmp=h}; fi
674 common-generated += gnu/lib-names.h gnu/lib-names.stmp
676 # The name under which the run-time dynamic linker is installed.
677 # We are currently going for the convention that `/lib/ld.so.1'
678 # names the SVR4/ELF ABI-compliant dynamic linker.
679 ifndef rtld-installed-name
681 rtld-installed-name = $(ld.so-version)
683 rtld-installed-name = ld.so.1
687 ifndef rtld-version-installed-name
688 rtld-version-installed-name = ld-$(version).so
693 endif # Makeconfig not yet included