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 # Force the user to configure before making.
90 $(common-objpfx)config.status: $(..)configure
91 @cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
92 echo The GNU C library has not been configured. >&2; \
93 echo Run \`configure\' to configure it before building. >&2; \
94 echo Try \`configure --help\' for more details. >&2; \
97 # Get the user's configuration parameters.
98 ifneq ($(wildcard $(..)configparms),)
99 include $(..)configparms
102 ifneq ($(wildcard $(objpfx)configparms),)
103 include $(objpfx)configparms
107 sysdep_dir := $(..)sysdeps
108 export sysdep_dir := $(sysdep_dir)
111 #### These are the configuration variables. You can define values for
112 #### the variables below in the file `configparms'.
113 #### Do NOT edit this file.
117 # Set this to either `stdio' or `libio', to compile in either GNU stdio
123 # Common prefix for machine-independent installation directories.
124 ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
128 # Common prefix for machine-dependent installation directories.
129 ifeq ($(origin exec_prefix),undefined)
130 exec_prefix = $(prefix)
133 # Where to install the library and object files.
135 libdir = $(exec_prefix)/lib
138 # Where to install the shared library and dynamic linker.
140 slibdir = $(exec_prefix)/lib
143 # Prefix to put on files installed in $(libdir). For libraries `libNAME.a',
144 # the prefix is spliced between `lib' and the name, so the linker switch
145 # `-l$(libprefix)NAME' finds the library; for other files the prefix is
146 # just prepended to the whole file name.
147 ifeq ($(origin libprefix),undefined)
151 # Where to install the header files.
153 includedir = $(exec_prefix)/include
156 # Where to install machine-independent data files.
157 # These are the timezone database, and the locale database.
159 datadir = $(prefix)/share
162 # Where to install the timezone data files (which are machine-independent).
164 zonedir = $(datadir)/zoneinfo
167 # Where to install the locale and message catalog data files (which are
168 # machine-independent).
170 localedir = $(datadir)/locale
173 # Where to install the locale charmap source files.
175 nlsdir = $(datadir)/nls
179 # Where to install programs.
181 bindir = $(exec_prefix)/bin
184 # Where to install administrative programs.
186 sbindir = $(exec_prefix)/sbin
189 # Where to install the Info files.
191 infodir = $(prefix)/info
194 # Where to install default configuration files. These include the local
195 # timezone specification and network data base files.
197 sysconfdir = $(prefix)/etc
200 # What timezone should be the installed default (e.g., US/Eastern).
201 # Run `make -C time echo-zonenames' to see a list of available zone names.
202 # The local timezone can be changed with `zic -l TIMEZONE' at any time.
207 # Where to install the "localtime" timezone file; this is the file whose
208 # contents $(localtime) specifies. If this is a relative pathname, it is
209 # relative to $(zonedir). It is a good idea to put this somewhere
210 # other than there, so the zoneinfo directory contains only universal data,
211 # localizing the configuration data elsewhere.
212 ifndef localtime-file
213 localtime-file = $(sysconfdir)/localtime
216 # What timezone's DST rules should be used when a POSIX-style TZ
217 # environment variable doesn't specify any rules. For 1003.1 compliance
218 # this timezone must use rules that are as U.S. federal law defines DST.
219 # Run `make -C time echo-zonenames' to see a list of available zone names.
220 # This setting can be changed with `zic -p TIMEZONE' at any time.
221 # If you want POSIX.1 compatibility, use `America/New_York'.
223 posixrules = America/New_York
226 # Where to install the "posixrules" timezone file; this is file
227 # whose contents $(posixrules) specifies. If this is a relative
228 # pathname, it is relative to $(zonedir).
229 ifndef posixrules-file
230 posixrules-file = posixrules
234 # Directory where your system's native header files live.
235 # This is used on Unix systems to generate some GNU libc header files.
237 sysincludedir = /usr/include
241 # Commands to install files.
243 INSTALL_DATA = $(INSTALL) -m 644
245 ifndef INSTALL_PROGRAM
246 INSTALL_PROGRAM = $(INSTALL)
253 # The name of the C compiler.
254 # If you've got GCC, and it works, use it.
255 ifeq ($(origin CC),default)
259 # The name of the C compiler to use for compilations of programs to run on
260 # the host that is building the library. If you set CC to a
261 # cross-compiler, you must set this to the normal compiler.
266 # Default flags to pass the C compiler.
267 ifndef default_cflags
271 # Flags to pass the C compiler when assembling preprocessed assembly code
272 # (`.S' files). On some systems the assembler doesn't understand the `#' line
273 # directives the preprocessor produces. If you have troubling compiling
274 # assembly code, try using -P here to suppress these directives.
279 # Command for linking programs with the C library.
281 +link = $(CC) -nostdlib -nostartfiles -o $@ \
282 $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS) \
283 $(addprefix $(csu-objpfx),start.o $(+preinit)) \
284 $(filter-out $(common-objpfx)libc%,$^) $(link-libc) \
285 $(addprefix $(csu-objpfx),$(+postinit))
287 ifndef config-LDFLAGS
288 ifeq (yes,$(build-shared))
289 config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
293 ifeq (yes,$(build-shared))
294 link-libc = -Wl,-rpath-link=$(common-objdir) \
295 $(common-objpfx)libc.so$(libc.so-version) $(gnulib)
296 # Choose the default search path for the dynamic linker based on
297 # where we will install libraries.
298 ifneq ($(libdir),$(slibdir))
299 default-rpath = $(slibdir):$(libdir)
301 default-rpath = $(libdir)
304 link-libc = $(common-objpfx)libc.a $(gnulib) $(common-objpfx)libc.a
315 csu-objpfx = $(objpfx)
316 elf-objpfx = $(objpfx)
318 csu-objpfx = $(..)csu/
319 elf-objpfx = $(..)elf/
322 ifeq (yes,$(build-shared))
323 ifndef rtld-installed-name
324 rtld-installed-name = ld.so
328 # How to run a program we just linked with our library.
329 # The program binary is assumed to be $(word 2,$^).
330 built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
331 ifneq (yes,$(build-shared))
332 built-program-cmd = $(built-program-file)
335 define built-program-cmd
336 LD_LIBRARY_PATH=$(common-objdir)$(patsubst -Wl$(comma)-rpath-link=%,:%,\
337 $(filter -Wl$(comma)-rpath-link=%,\
338 $(sysdep-LDFLAGS))) \
339 $(elf-objpfx)ld.so $(built-program-file)
351 # Extra flags to pass to GCC.
352 +gccwarn := -Wall -Wwrite-strings -Wno-parentheses -Winline -Wstrict-prototypes
354 # This is the program that generates makefile
355 # dependencies from C source files.
360 # The program that makes Emacs-style TAGS files.
363 # The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
364 # perhaps others) to preprocess assembly code in some cases.
368 #### End of configuration variables.
371 # This tells some versions of GNU make before 3.63 not to export all variables.
374 # We want to echo the commands we're running without
375 # umpteem zillion filenames along with it (we use `...' instead)
376 # but we don't want this echoing done when the user has said
377 # he doesn't want to see commands echoed by using -s.
378 ifneq "$(findstring s,$(MAKEFLAGS))" "" # if -s
379 +cmdecho := echo >/dev/null
384 # These are the flags given to the compiler to tell
385 # it what sort of optimization and/or debugging output to do.
387 # If `CFLAGS' was defined, use that.
389 +cflags := $(filter-out -I%,$(CFLAGS))
393 # If none of the above worked, default to "-g".
394 ifeq "$(strip $(+cflags))" ""
395 +cflags := $(default_cflags)
396 endif # $(+cflags) == ""
398 # If using gcc, add flags that only it will grok.
399 ifneq "$(findstring gcc,$(CC))" ""
400 +cflags := $(+cflags) $(+gccwarn)
406 # Don't duplicate options if we inherited variables from the parent.
407 +cflags := $(sort $(+cflags))
410 # These are flags given to the C compiler to tell it to look for include
411 # files (including ones given in angle brackets) in the current directory
412 # and in the parent library source directory.
413 # `+sysdep-includes' will be defined by Makerules.
414 +includes = -I. $(filter-out -I,-I$(patsubst %/,%,$(..))) $($(stdio)-include) \
415 $(includes) $(+sysdep-includes) $(last-includes)
417 # Since libio has several internal header files, we use a -I instead
418 # of many little headers in the top level source directory.
419 libio-include = -I$(..)libio
421 # These are the variables that the implicit compilation rules use.
422 CPPFLAGS = $(+includes) $(defines) -include $(..)libc-symbols.h \
423 $(sysdep-CPPFLAGS) $(CPPFLAGS-$(suffix $@))
424 override CFLAGS = $(+cflags) $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) \
428 # This is the macro that the implicit linking rules use.
429 ifneq "$(filter -g,$(+cflags))" "" # -g is in $(+cflags)
434 # Enable object files for different versions of the library.
435 # Various things use $(object-suffixes) to know what all to make.
436 # The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
437 # to pass different flags for each flavor.
438 libtypes = $(foreach o,$(object-suffixes),$(libtype$o))
439 object-suffixes := .o
441 ifeq (yes,$(build-shared))
442 # Under --enable-shared, we will build a shared library of PIC objects.
443 # The PIC object files are named foo.so.
444 object-suffixes += .so
447 libtype.so := lib%_pic.a
449 ifeq (yes,$(build-profile))
450 # Under --enable-profile, we will build a static library of profiled objects.
451 # The profiled object files are named foo.po.
452 object-suffixes += .po
453 CPPFLAGS-.po = -DPROF
455 libtype.po = lib%_p.a
457 ifeq (yes,$(build-omitfp))
458 # Under --enable-omitfp, we build an the library optimized without
459 # debugging information using -fomit-frame-pointer, and build an extra
460 # library with debugging information. The debuggable objects are named foo.go.
461 object-suffixes += .go
463 CFLAGS-.o = -g0 -O99 -fomit-frame-pointer
464 CFLAGS-.so += $(CFLAGS.o)
465 libtype.go = lib%_g.a
469 +gnu-stabs = $(shell echo>&2 '*** BARF ON ME')
471 ifneq ($(BUILD_CC),$(CC))
472 cross-compiling := yes
474 cross-compiling := no
478 endif # Makeconfig not yet included