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.
63 common-objpfx = $(objpfx)
64 common-objdir = $(objdir)
71 # This is a kludge. make wizards might grok.
72 common-objpfx = sysdeps/../
78 # Get the values defined by options to `configure'.
79 include $(common-objpfx)config.make
81 # Run config.status to update config.make and config.h. We don't show the
82 # dependence of config.h to Make, because it is only touched when it
83 # changes and so config.status would be run every time; the dependence of
84 # config.make should suffice to force regeneration and re-exec, and the new
85 # image will notice if config.h changed.
86 $(common-objpfx)config.make: $(common-objpfx)config.status $(..)config.h.in
87 cd $(<D); $(SHELL) $(<F)
89 # Find all the sysdeps configure fragments, to make sure we re-run
90 # configure when any of them changes.
92 $(foreach dir,$(config-sysdirs),\
94 $(firstword $(wildcard \
95 $(sysdep_dir)/$(dir)/configure \
96 $(sysdep_dir)/$(dir)/configure.in))))
98 # Force the user to configure before making.
99 $(common-objpfx)config.status: $(..)configure $(sysdep-configures)
100 @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
101 echo The GNU C library has not been configured. >&2; \
102 echo Run \`configure\' to configure it before building. >&2; \
103 echo Try \`configure --help\' for more details. >&2; \
106 # Get the user's configuration parameters.
107 ifneq ($(wildcard $(..)configparms),)
108 include $(..)configparms
111 ifneq ($(wildcard $(objpfx)configparms),)
112 include $(objpfx)configparms
116 sysdep_dir := $(..)sysdeps
117 export sysdep_dir := $(sysdep_dir)
120 #### These are the configuration variables. You can define values for
121 #### the variables below in the file `configparms'.
122 #### Do NOT edit this file.
126 # Set this to either `stdio' or `libio', to compile in either GNU stdio
132 # Common prefix for machine-independent installation directories.
133 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
137 # Common prefix for machine-dependent installation directories.
138 ifeq ($(origin exec_prefix),undefined)
139 exec_prefix = $(prefix)
142 # Where to install the library and object files.
144 libdir = $(exec_prefix)/lib
147 # Where to install the shared library and dynamic linker.
149 slibdir = $(exec_prefix)/lib
152 # Prefix to put on files installed in $(libdir). For libraries `libNAME.a',
153 # the prefix is spliced between `lib' and the name, so the linker switch
154 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
155 # just prepended to the whole file name.
156 ifeq ($(origin libprefix),undefined)
160 # Where to install the header files.
162 includedir = $(exec_prefix)/include
165 # Where to install machine-independent data files.
166 # These are the timezone database, and the locale database.
168 datadir = $(prefix)/share
171 # Where to install the timezone data files (which are machine-independent).
173 zonedir = $(datadir)/zoneinfo
176 # Where to install the locale and message catalog data files (which are
177 # machine-independent).
179 localedir = $(datadir)/locale
182 # Where to install the locale charmap source files.
184 i18ndir = $(datadir)/i18n
188 # Where to install programs.
190 bindir = $(exec_prefix)/bin
193 # Where to install administrative programs.
195 sbindir = $(exec_prefix)/sbin
198 # Where to install the Info files.
200 infodir = $(prefix)/info
203 # Where to install default configuration files. These include the local
204 # timezone specification and network data base files.
206 sysconfdir = $(prefix)/etc
209 # What timezone should be the installed default (e.g., US/Eastern).
210 # Run `make -C time echo-zonenames' to see a list of available zone names.
211 # The local timezone can be changed with `zic -l TIMEZONE' at any time.
216 # Where to install the "localtime" timezone file; this is the file whose
217 # contents $(localtime) specifies. If this is a relative pathname, it is
218 # relative to $(zonedir). It is a good idea to put this somewhere
219 # other than there, so the zoneinfo directory contains only universal data,
220 # localizing the configuration data elsewhere.
221 ifndef localtime-file
222 localtime-file = $(sysconfdir)/localtime
225 # What to use for leap second specifications in compiling the default
226 # timezone files. Set this to `/dev/null' for no leap second handling as
227 # 1003.1 requires, or to `leapseconds' for proper leap second handling.
228 # Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
229 # This variable determines the default: if it's `/dev/null',
230 # ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
232 leapseconds = /dev/null
235 # What timezone's DST rules should be used when a POSIX-style TZ
236 # environment variable doesn't specify any rules. For 1003.1 compliance
237 # this timezone must use rules that are as U.S. federal law defines DST.
238 # Run `make -C time echo-zonenames' to see a list of available zone names.
239 # This setting can be changed with `zic -p TIMEZONE' at any time.
240 # If you want POSIX.1 compatibility, use `America/New_York'.
242 posixrules = America/New_York
245 # Where to install the "posixrules" timezone file; this is file
246 # whose contents $(posixrules) specifies. If this is a relative
247 # pathname, it is relative to $(zonedir).
248 ifndef posixrules-file
249 posixrules-file = posixrules
253 # Directory where your system's native header files live.
254 # This is used on Unix systems to generate some GNU libc header files.
256 sysincludedir = /usr/include
260 # Commands to install files.
262 INSTALL_DATA = $(INSTALL) -m 644
264 ifndef INSTALL_PROGRAM
265 INSTALL_PROGRAM = $(INSTALL)
272 # The name of the C compiler.
273 # If you've got GCC, and it works, use it.
274 ifeq ($(origin CC),default)
278 # The name of the C compiler to use for compilations of programs to run on
279 # the host that is building the library. If you set CC to a
280 # cross-compiler, you must set this to the normal compiler.
285 # Default flags to pass the C compiler.
286 ifndef default_cflags
290 # Flags to pass the C compiler when assembling preprocessed assembly code
291 # (`.S' files). On some systems the assembler doesn't understand the `#' line
292 # directives the preprocessor produces. If you have troubling compiling
293 # assembly code, try using -P here to suppress these directives.
298 # Command for linking programs with the C library.
300 +link = $(CC) -nostdlib -nostartfiles -o $@ \
301 $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) \
302 $(addprefix $(csu-objpfx),start.o $(+preinit)) \
303 $(filter-out $(common-objpfx)libc%,$^) $(link-libc) \
304 $(addprefix $(csu-objpfx),$(+postinit))
306 ifndef config-LDFLAGS
307 ifeq (yes,$(build-shared))
308 config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
312 ifeq (yes,$(build-shared))
313 # We need the versioned name of libc.so in the deps of $(others) et al
314 # so that the symlink to libc.so is created before anything tries to
315 # run the linked programs.
316 link-libc = -Wl,-rpath-link=$(rpath-link) \
317 $(common-objpfx)libc.so$(libc.so-version) \
318 $(elfobjdir)/$(rtld-installed-name) \
319 $(common-objpfx)libc.a $(gnulib)
320 # Choose the default search path for the dynamic linker based on
321 # where we will install libraries.
322 ifneq ($(libdir),$(slibdir))
323 default-rpath = $(slibdir):$(libdir)
325 default-rpath = $(libdir)
327 # This is how to find at build-time things that will be installed there.
328 rpath-link = $(common-objdir):$(elfobjdir)
330 link-libc = $(common-objpfx)libc.a $(gnulib) $(common-objpfx)libc.a
341 csu-objpfx = $(objpfx)
342 elf-objpfx = $(objpfx)
344 csu-objpfx = $(..)csu/
345 elf-objpfx = $(..)elf/
348 ifeq (yes,$(build-shared))
349 ifndef rtld-installed-name
350 rtld-installed-name = ld.so
354 # How to run a program we just linked with our library.
355 # The program binary is assumed to be $(word 2,$^).
356 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
357 ifneq (yes,$(build-shared))
358 built-program-cmd = $(built-program-file)
361 define built-program-cmd
362 LD_LIBRARY_PATH=$(rpath-link)$(patsubst -Wl$(comma)-rpath-link=%,:%,\
363 $(filter -Wl$(comma)-rpath-link=%,\
364 $(sysdep-LDFLAGS))) \
365 $(elf-objpfx)ld.so $(built-program-file)
377 # Extra flags to pass to GCC.
378 +gccwarn := -Wall -Wwrite-strings -Wno-parentheses -Winline -Wstrict-prototypes
380 # This is the program that generates makefile
381 # dependencies from C source files.
386 # The program that makes Emacs-style TAGS files.
389 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
390 # perhaps others) to preprocess assembly code in some cases.
394 #### End of configuration variables.
397 # This tells some versions of GNU make before 3.63 not to export all variables.
400 # We want to echo the commands we're running without
401 # umpteem zillion filenames along with it (we use `...' instead)
402 # but we don't want this echoing done when the user has said
403 # he doesn't want to see commands echoed by using -s.
404 ifneq "$(findstring s,$(MAKEFLAGS))" "" # if -s
405 +cmdecho := echo >/dev/null
410 # These are the flags given to the compiler to tell
411 # it what sort of optimization and/or debugging output to do.
413 # If `CFLAGS' was defined, use that.
415 +cflags := $(filter-out -I%,$(CFLAGS))
419 # If none of the above worked, default to "-g".
420 ifeq "$(strip $(+cflags))" ""
421 +cflags := $(default_cflags)
422 endif # $(+cflags) == ""
424 +cflags := $(+cflags) $(+gccwarn)
427 # Don't duplicate options if we inherited variables from the parent.
428 +cflags := $(sort $(+cflags))
431 # These are flags given to the C compiler to tell it to look for include
432 # files (including ones given in angle brackets) in the current directory
433 # and in the parent library source directory.
434 # `+sysdep-includes' will be defined by Makerules.
435 +includes = -I. $(filter-out -I,-I$(patsubst %/,%,$(..))) $($(stdio)-include) \
436 $(includes) $(+sysdep-includes) $(last-includes)
438 # Since libio has several internal header files, we use a -I instead
439 # of many little headers in the top level source directory.
440 libio-include = -I$(..)libio
442 # These are the variables that the implicit compilation rules use.
443 CPPFLAGS = $(+includes) $(defines) -include $(..)libc-symbols.h \
444 $(sysdep-CPPFLAGS) $(CPPFLAGS-$(suffix $@))
445 override CFLAGS = $(+cflags) $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) \
449 # This is the macro that the implicit linking rules use.
450 ifneq "$(filter -g,$(+cflags))" "" # -g is in $(+cflags)
455 # Enable object files for different versions of the library.
456 # Various things use $(object-suffixes) to know what all to make.
457 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
458 # to pass different flags for each flavor.
459 libtypes = $(foreach o,$(object-suffixes),$(libtype$o))
460 object-suffixes := .o
462 ifeq (yes,$(build-shared))
463 # Under --enable-shared, we will build a shared library of PIC objects.
464 # The PIC object files are named foo.so.
465 object-suffixes += .so
468 libtype.so := lib%_pic.a
470 ifeq (yes,$(build-profile))
471 # Under --enable-profile, we will build a static library of profiled objects.
472 # The profiled object files are named foo.po.
473 object-suffixes += .po
474 CPPFLAGS-.po = -DPROF
476 libtype.po = lib%_p.a
478 ifeq (yes,$(build-omitfp))
479 # Under --enable-omitfp, we build an the library optimized without
480 # debugging information using -fomit-frame-pointer, and build an extra
481 # library with debugging information. The debuggable objects are named foo.go.
482 object-suffixes += .go
484 CFLAGS-.o = -g0 -O99 -fomit-frame-pointer
485 CFLAGS-.so += $(CFLAGS.o)
486 libtype.go = lib%_g.a
490 +gnu-stabs = $(shell echo>&2 '*** BARF ON ME')
492 ifneq ($(BUILD_CC),$(CC))
493 cross-compiling := yes
495 cross-compiling := no
498 # Figure out the version numbers from version.h.
500 $(common-objpfx)version.mk: $(..)version.h $(..)Makeconfig
501 sed -n -e 's/^.*RELEASE.*"\([^"]*\)".*$$/release=\1/p' \
502 -e 's/^.*VERSION.*"\([^"]*\)".*$$/version=\1/p' \
506 endif # Makeconfig not yet included