1 # Copyright (C) 1991, 92, 93, 94, 95, 96 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
16 # not, write to the Free Software Foundation, Inc., 675 Mass Ave,
17 # Cambridge, MA 02139, USA.
20 # Makefile configuration options for the GNU C library.
23 This makefile requires GNU Make.
26 ifneq "$(origin +included-Makeconfig)" "file"
28 +included-Makeconfig := yes
34 # If config.make exists, the source directory was configured,
35 # so don't try to be clever and find another directory to build in.
36 ifneq (,$(wildcard $(..)config.make))
39 else # Not configured.
47 # Directory for object files and libc.a. If this is not defined, the
48 # object files live in the subdirectories where their sources live, and
49 # libc.a lives in the parent directory (this probably doesn't work any
52 ifeq ($(filter /%,$(ARCH)),)
53 objdir := $(..)$(ARCH)
59 # $(common-objdir) is the place to put objects and
60 # such that are not specific to a single subdir.
62 objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/)
63 common-objpfx = $(objdir)/
64 common-objdir = $(objdir)
71 # This is a kludge. make wizards might grok.
72 common-objpfx = sysdeps/../
77 # Root of the sysdeps tree.
78 sysdep_dir := $(..)sysdeps
79 export sysdep_dir := $(sysdep_dir)
81 # Get the values defined by options to `configure'.
82 include $(common-objpfx)config.make
84 # Complete path to sysdep dirs.
85 full-config-sysdirs := $(filter /%, $(config-sysdirs)) \
86 $(addprefix $(..), $(filter-out /%, $(config-sysdirs)))
87 export full-config-sysdirs := $(full-config-sysdirs)
89 # Run config.status to update config.make and config.h. We don't show the
90 # dependence of config.h to Make, because it is only touched when it
91 # changes and so config.status would be run every time; the dependence of
92 # config.make should suffice to force regeneration and re-exec, and the new
93 # image will notice if config.h changed.
94 $(common-objpfx)config.make: $(common-objpfx)config.status $(..)config.h.in
95 cd $(<D); $(SHELL) $(<F)
97 # Find all the sysdeps configure fragments, to make sure we re-run
98 # configure when any of them changes.
99 $(common-objpfx)config.status: $(..)configure \
100 $(foreach dir,$(full-config-sysdirs),\
104 $(firstword $(wildcard \
105 $(addprefix $(dir)/,configure configure.in)))))
106 @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
107 echo The GNU C library has not been configured. >&2; \
108 echo Run \`configure\' to configure it before building. >&2; \
109 echo Try \`configure --help\' for more details. >&2; \
112 # Get the user's configuration parameters.
113 ifneq ($(wildcard $(..)configparms),)
114 include $(..)configparms
117 ifneq ($(wildcard $(common-objpfx)configparms),)
118 include $(common-objpfx)configparms
123 #### These are the configuration variables. You can define values for
124 #### the variables below in the file `configparms'.
125 #### Do NOT edit this file.
129 # Set this to either `stdio' or `libio', to compile in either GNU stdio
135 # Common prefix for machine-independent installation directories.
136 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
140 # Common prefix for machine-dependent installation directories.
141 ifeq ($(origin exec_prefix),undefined)
142 exec_prefix = $(prefix)
145 # Where to install the library and object files.
147 libdir = $(exec_prefix)/lib
150 # Where to install the shared library and dynamic linker.
152 slibdir = $(exec_prefix)/lib
155 # Prefix to put on files installed in $(libdir). For libraries `libNAME.a',
156 # the prefix is spliced between `lib' and the name, so the linker switch
157 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
158 # just prepended to the whole file name.
159 ifeq ($(origin libprefix),undefined)
163 # Where to install the header files.
165 includedir = $(exec_prefix)/include
168 # Where to install machine-independent data files.
169 # These are the timezone database, and the locale database.
171 datadir = $(prefix)/share
174 # Where to install the timezone data files (which are machine-independent).
176 zonedir = $(datadir)/zoneinfo
179 # Where to install the locale and message catalog data files (which are
180 # machine-independent).
182 localedir = $(datadir)/locale
185 # Where to install the locale charmap source files.
187 i18ndir = $(datadir)/i18n
191 # Where to install programs.
193 bindir = $(exec_prefix)/bin
196 # Where to install administrative programs.
198 sbindir = $(exec_prefix)/sbin
201 # Where to install the Info files.
203 infodir = $(prefix)/info
206 # Where to install default configuration files. These include the local
207 # timezone specification and network data base files.
209 sysconfdir = $(prefix)/etc
212 # What timezone should be the installed default (e.g., US/Eastern).
213 # Run `make -C time echo-zonenames' to see a list of available zone names.
214 # The local timezone can be changed with `zic -l TIMEZONE' at any time.
219 # Where to install the "localtime" timezone file; this is the file whose
220 # contents $(localtime) specifies. If this is a relative pathname, it is
221 # relative to $(zonedir). It is a good idea to put this somewhere
222 # other than there, so the zoneinfo directory contains only universal data,
223 # localizing the configuration data elsewhere.
224 ifndef localtime-file
225 localtime-file = $(sysconfdir)/localtime
228 # What to use for leap second specifications in compiling the default
229 # timezone files. Set this to `/dev/null' for no leap second handling as
230 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
231 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
232 # This variable determines the default: if it's `/dev/null',
233 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
235 leapseconds = /dev/null
238 # What timezone's DST rules should be used when a POSIX-style TZ
239 # environment variable doesn't specify any rules. For 1003.1 compliance
240 # this timezone must use rules that are as U.S. federal law defines DST.
241 # Run `make -C time echo-zonenames' to see a list of available zone names.
242 # This setting can be changed with `zic -p TIMEZONE' at any time.
243 # If you want POSIX.1 compatibility, use `America/New_York'.
245 posixrules = America/New_York
248 # Where to install the "posixrules" timezone file; this is file
249 # whose contents $(posixrules) specifies. If this is a relative
250 # pathname, it is relative to $(zonedir).
251 ifndef posixrules-file
252 posixrules-file = posixrules
256 # Directory where your system's native header files live.
257 # This is used on Unix systems to generate some GNU libc header files.
259 sysincludedir = /usr/include
263 # Commands to install files.
265 INSTALL_DATA = $(INSTALL) -m 644
267 ifndef INSTALL_PROGRAM
268 INSTALL_PROGRAM = $(INSTALL)
275 # The name of the C compiler.
276 # If you've got GCC, and it works, use it.
277 ifeq ($(origin CC),default)
281 # The name of the C compiler to use for compilations of programs to run on
282 # the host that is building the library. If you set CC to a
283 # cross-compiler, you must set this to the normal compiler.
288 # Default flags to pass the C compiler.
289 ifndef default_cflags
290 default_cflags := -g -O
293 # Flags to pass the C compiler when assembling preprocessed assembly code
294 # (`.S' files). On some systems the assembler doesn't understand the `#' line
295 # directives the preprocessor produces. If you have troubling compiling
296 # assembly code, try using -P here to suppress these directives.
301 # Command for linking programs with the C library.
303 +link = $(CC) -nostdlib -nostartfiles -o $@ \
304 $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) \
305 $(addprefix $(csu-objpfx),start.o) $(+preinit) \
306 $(filter-out $(addprefix $(csu-objpfx),start.o) $(+preinit) \
307 $(link-extra-libs) $(common-objpfx)libc% $(+postinit),$^) \
308 $(link-extra-libs) $(link-libc) $(+postinit)
310 ifndef config-LDFLAGS
311 ifeq (yes,$(build-shared))
312 config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
316 ifeq (yes,$(build-shared))
317 # We need the versioned name of libc.so in the deps of $(others) et al
318 # so that the symlink to libc.so is created before anything tries to
319 # run the linked programs.
320 link-libc = -Wl,-rpath-link=$(rpath-link) \
321 $(common-objpfx)libc.so$(libc.so-version) \
322 $(elfobjdir)/$(rtld-installed-name) \
323 $(common-objpfx)libc.a $(gnulib)
324 # Choose the default search path for the dynamic linker based on
325 # where we will install libraries.
326 ifneq ($(libdir),$(slibdir))
327 default-rpath = $(slibdir):$(libdir)
329 default-rpath = $(libdir)
331 # This is how to find at build-time things that will be installed there.
332 rpath-link = $(common-objdir):$(elfobjdir):$(nssobjdir)
333 nssobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)nss)
335 link-libc = $(common-objpfx)libc.a $(gnulib) $(common-objpfx)libc.a
338 ifndef link-extra-libs
339 ifeq (yes,$(build-shared))
340 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).so$($(notdir $(lib)).so-version))
342 link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).a)
349 +preinit = $(addprefix $(csu-objpfx),crti.o)
350 +postinit = $(addprefix $(csu-objpfx),crtn.o)
352 csu-objpfx = $(common-objpfx)csu/
353 elf-objpfx = $(common-objpfx)elf/
354 db-objpfx = $(common-objpfx)db/
356 # How to run a program we just linked with our library.
357 # The program binary is assumed to be $(word 2,$^).
358 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
359 ifneq (yes,$(build-shared))
360 built-program-cmd = $(built-program-file)
363 sysdep-library-path = \
364 $(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
365 $(filter -Wl$(comma)-rpath-link=%,\
366 $(sysdep-LDFLAGS)))))
367 define built-program-cmd
368 LD_LIBRARY_PATH=$(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) \
369 $(elf-objpfx)$(rtld-installed-name) $(built-program-file)
381 # Extra flags to pass to GCC.
382 +gccwarn := -Wall -Wwrite-strings -Wno-parentheses -Winline -Wstrict-prototypes
384 # This is the program that generates makefile
385 # dependencies from C source files.
390 # The program that makes Emacs-style TAGS files.
393 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
394 # perhaps others) to preprocess assembly code in some cases.
398 #### End of configuration variables.
401 # This tells some versions of GNU make before 3.63 not to export all variables.
404 # We want to echo the commands we're running without
405 # umpteem zillion filenames along with it (we use `...' instead)
406 # but we don't want this echoing done when the user has said
407 # he doesn't want to see commands echoed by using -s.
408 ifneq "$(findstring s,$(MAKEFLAGS))" "" # if -s
409 +cmdecho := echo >/dev/null
414 # These are the flags given to the compiler to tell
415 # it what sort of optimization and/or debugging output to do.
417 # If `CFLAGS' was defined, use that.
419 +cflags := $(filter-out -I%,$(CFLAGS))
423 # If none of the above worked, default to "-g".
424 ifeq "$(strip $(+cflags))" ""
425 +cflags := $(default_cflags)
426 endif # $(+cflags) == ""
428 +cflags := $(+cflags) $(+gccwarn)
431 # Don't duplicate options if we inherited variables from the parent.
432 +cflags := $(sort $(+cflags))
435 # These are flags given to the C compiler to tell it to look for include
436 # files (including ones given in angle brackets) in the current directory
437 # and in the parent library source directory.
438 # `+sysdep-includes' will be defined by Makerules.
439 +includes = -I. $(filter-out -I,-I$(patsubst %/,%,$(..))) $($(stdio)-include) \
440 $(includes) $(+sysdep-includes) $(last-includes)
442 # Since libio has several internal header files, we use a -I instead
443 # of many little headers in the top level source directory.
444 libio-include = -I$(..)libio
446 # These are the variables that the implicit compilation rules use.
447 CPPFLAGS = $(+includes) $(defines) -include $(..)libc-symbols.h \
448 $(sysdep-CPPFLAGS) $(CPPFLAGS-$(suffix $@))
449 override CFLAGS = $(+cflags) $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) \
453 # This is the macro that the implicit linking rules use.
454 ifneq "$(filter -g,$(+cflags))" "" # -g is in $(+cflags)
459 # Enable object files for different versions of the library.
460 # Various things use $(object-suffixes) to know what all to make.
461 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
462 # to pass different flags for each flavor.
463 libtypes = $(foreach o,$(object-suffixes),$(libtype$o))
464 object-suffixes := .o
466 ifeq (yes,$(build-shared))
467 # Under --enable-shared, we will build a shared library of PIC objects.
468 # The PIC object files are named foo.so.
469 object-suffixes += .so
472 libtype.so := lib%_pic.a
474 ifeq (yes,$(build-profile))
475 # Under --enable-profile, we will build a static library of profiled objects.
476 # The profiled object files are named foo.po.
477 object-suffixes += .po
478 CPPFLAGS-.po = -DPROF
480 libtype.po = lib%_p.a
482 ifeq (yes,$(build-omitfp))
483 # Under --enable-omitfp, we build an the library optimized without
484 # debugging information using -fomit-frame-pointer, and build an extra
485 # library with debugging information. The debuggable objects are named foo.go.
486 object-suffixes += .go
488 CFLAGS-.o = -g0 -O99 -fomit-frame-pointer
489 CFLAGS-.so += $(CFLAGS-.o)
490 libtype.go = lib%_g.a
494 +gnu-stabs = $(shell echo>&2 '*** BARF ON ME')
500 ifneq ($(BUILD_CC),$(CC))
501 cross-compiling := yes
503 cross-compiling := no
506 # Figure out the version numbers from version.h.
508 $(common-objpfx)version.mk: $(..)version.h $(..)Makeconfig
509 sed -n -e 's/^.*RELEASE.*"\([^"]*\)".*$$/release=\1/p' \
510 -e 's/^.*VERSION.*"\([^"]*\)".*$$/version=\1/p' \
514 ifeq (yes, $(build-shared))
516 # Process the shlib-versions file, which tells us what shared library
517 # version numbers to use when we install shared objects on this system.
518 -include $(common-objpfx)soversions.mk
519 $(common-objpfx)soversions.mk: $(..)shlib-versions $(..)Makeconfig \
520 $(wildcard $(patsubst %, $(..)%/shlib-versions,\
522 $(common-objpfx)config.make
523 (file="$(wildcard $(patsubst %,$(..)%/shlib-versions,$(add-ons))) \
524 $(..)shlib-versions"; \
525 for f in $$file; do \
526 sed 's/#.*$$//' $$f | while read conf versions; do \
527 test -n "$$versions" || continue; \
528 case '$(config-machine)-$(config-vendor)-$(config-os)' in $$conf)\
529 for v in $$versions; do \
530 lib=`echo $$v | sed 's/=.*$$//'`; \
531 if eval "test -z \"\$$vers_lib$$lib\""; then \
532 eval vers_lib$${lib}=yes; \
533 number=`echo $$v | sed "s/^.*=//"`; \
535 [0-9]*) echo "$$lib.so-version=.$$number"; \
536 echo "all-sonames+=$$lib.so\$$($$lib.so-version)";;\
537 *) echo "$$lib.so-version=$$number"; \
538 echo "all-sonames+=\$$($$lib.so-version)";; \
541 done ;; esac; done; \
545 # Get $(version) defined with the release version number.
546 -include $(common-objpfx)version.mk
549 # The name under which the run-time dynamic linker is installed.
550 # We are currently going for the convention that `/lib/ld.so.1'
551 # names the SVR4/ELF ABI-compliant dynamic linker.
552 ifndef rtld-installed-name
554 rtld-installed-name = $(ld.so-version)
556 rtld-installed-name = ld.so.1
562 endif # Makeconfig not yet included