path: root/Makeconfig

# Copyright (C) 1991, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
# This file is part of the GNU C Library.

# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.

# The GNU C Library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Library General Public License for more details.

# You should have received a copy of the GNU Library General Public
# License along with the GNU C Library; see the file COPYING.LIB.  If not,
# write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.

#
#	Makefile configuration options for the GNU C library.
#
ifneq (,)
This makefile requires GNU Make.
endif

all: # Make this the default goal

ifneq "$(origin +included-Makeconfig)" "file"

+included-Makeconfig := yes

ifdef subdir
.. := ../
endif

# If config.make exists, the source directory was configured,
# so don't try to be clever and find another directory to build in.
ifneq (,$(wildcard $(..)config.make))
ARCH =
machine =
else	# Not configured.
ifndef ARCH
ifdef machine
ARCH = $(machine)
endif # machine
endif # ARCH
endif # config.make

# Directory for object files and libc.a.  If this is not defined, the
# object files live in the subdirectories where their sources live, and
# libc.a lives in the parent directory (this probably doesn't work any
# more).
ifdef ARCH
ifeq ($(filter /%,$(ARCH)),)
objdir := $(..)$(ARCH)
else
objdir = $(ARCH)
endif
endif

# $(common-objdir) is the place to put objects and
# such that are not specific to a single subdir.
ifdef objdir
objpfx := $(patsubst %//,%/,$(objdir)/$(subdir)/)
common-objpfx = $(objdir)/
common-objdir = $(objdir)
else
objpfx :=
ifdef ..
common-objpfx = $(..)
common-objdir = ..
else
# This is a kludge.  make wizards might grok.
common-objpfx = sysdeps/../
common-objdir = .
endif
endif

# Root of the sysdeps tree.
sysdep_dir := $(..)sysdeps
export sysdep_dir := $(sysdep_dir)

# Get the values defined by options to `configure'.
include $(common-objpfx)config.make

# We have a special subdir for each binary format.
# For now, only ELF is fully supported.
ifeq ($(elf),yes)
binfmt-subdir = elf
else
binfmt-subdir =
endif

# Complete path to sysdep dirs.
full-config-sysdirs := $(filter /%, $(config-sysdirs)) \
		       $(addprefix $(..), $(filter-out /%, $(config-sysdirs)))
export full-config-sysdirs := $(full-config-sysdirs)

# Run config.status to update config.make and config.h.  We don't show the
# dependence of config.h to Make, because it is only touched when it
# changes and so config.status would be run every time; the dependence of
# config.make should suffice to force regeneration and re-exec, and the new
# image will notice if config.h changed.
$(common-objpfx)config.make: $(common-objpfx)config.status \
			     $(..)config.make.in $(..)config.h.in
	cd $(<D); $(SHELL) $(<F)

# Find all the sysdeps configure fragments, to make sure we re-run
# configure when any of them changes.
$(common-objpfx)config.status: $(..)version.h $(..)configure \
			       $(foreach dir,$(full-config-sysdirs),\
					 $(wildcard \
					   $(dir)/Implies) \
					 $(patsubst %.in,%,\
						    $(firstword $(wildcard \
 $(addprefix $(dir)/,configure configure.in)))))
	@cd $(@D); if test -f $(@F); then exec $(SHELL) $(@F) --recheck; else \
	 echo The GNU C library has not been configured. >&2; \
	 echo Run \`configure\' to configure it before building. >&2; \
	 echo Try \`configure --help\' for more details. >&2; \
	 exit 1; fi

# Get the user's configuration parameters.
ifneq ($(wildcard $(..)configparms),)
include $(..)configparms
endif
ifneq ($(objpfx),)
ifneq ($(wildcard $(common-objpfx)configparms),)
include $(common-objpfx)configparms
endif
endif

####
####	These are the configuration variables.  You can define values for
####	the variables below in the file `configparms'.
####	Do NOT edit this file.
####


# Set this to either `stdio' or `libio', to compile in either GNU stdio
# or GNU libio.
ifndef stdio
stdio = stdio
endif

# Common prefix for machine-independent installation directories.
ifeq ($(origin prefix),undefined) # ifndef would override explicit empty value.
prefix = /usr/local
endif

# Common prefix for machine-dependent installation directories.
ifeq ($(origin exec_prefix),undefined)
exec_prefix = $(prefix)
endif

# Where to install the library and object files.
ifndef libdir
libdir = $(exec_prefix)/lib
endif
inst_libdir = $(install_root)$(libdir)

# Where to install the shared library and dynamic linker.
ifndef slibdir
slibdir = $(exec_prefix)/lib
endif
inst_slibdir = $(install_root)$(slibdir)

# Prefix to put on files installed in $(libdir).  For libraries `libNAME.a',
# the prefix is spliced between `lib' and the name, so the linker switch
# `-l$(libprefix)NAME' finds the library; for other files the prefix is
# just prepended to the whole file name.
ifeq ($(origin libprefix),undefined)
libprefix =
endif

# Where to install the header files.
ifndef includedir
includedir = $(exec_prefix)/include
endif
inst_includedir = $(install_root)$(includedir)

# Where to install machine-independent data files.
# These are the timezone database, and the locale database.
ifndef datadir
datadir = $(prefix)/share
endif
inst_datadir = $(install_root)$(datadir)

# Where to install the timezone data files (which are machine-independent).
ifndef zonedir
zonedir = $(datadir)/zoneinfo
endif
inst_zonedir = $(install_root)$(zonedir)

# Where to install the locale and message catalog data files (which are
# machine-independent).
ifndef localedir
localedir = $(datadir)/locale
endif
inst_localedir = $(install_root)$(localedir)

# Where to install the locale charmap source files.
ifndef i18ndir
i18ndir = $(datadir)/i18n
endif
inst_i18ndir = $(install_root)$(i18ndir)


# Where to install programs.
ifndef bindir
bindir = $(exec_prefix)/bin
endif
inst_bindir = $(install_root)$(bindir)

# Where to install administrative programs.
ifndef rootsbindir
rootsbindir = $(exec_prefix)/sbin
endif
inst_rootsbindir = $(install_root)$(rootsbindir)

ifndef sbindir
sbindir = $(exec_prefix)/sbin
endif
inst_sbindir = $(install_root)$(sbindir)

# Where to install the Info files.
ifndef infodir
infodir = $(prefix)/info
endif
inst_infodir = $(install_root)$(infodir)

# Where to install default configuration files.  These include the local
# timezone specification and network data base files.
ifndef sysconfdir
sysconfdir = $(prefix)/etc
endif
inst_sysconfdir = $(install_root)$(sysconfdir)

# What timezone should be the installed default (e.g., US/Eastern).
# Run `make -C time echo-zonenames' to see a list of available zone names.
# The local timezone can be changed with `zic -l TIMEZONE' at any time.
ifndef localtime
localtime = Factory
endif

# Where to install the "localtime" timezone file; this is the file whose
# contents $(localtime) specifies.  If this is a relative pathname, it is
# relative to $(zonedir).  It is a good idea to put this somewhere
# other than there, so the zoneinfo directory contains only universal data,
# localizing the configuration data elsewhere.
ifndef localtime-file
localtime-file = $(sysconfdir)/localtime
inst_localtime-file = $(install_root)$(localtime-file)
endif

# What to use for leap second specifications in compiling the default
# timezone files.  Set this to `/dev/null' for no leap second handling as
# 1003.1 requires, or to `leapseconds' for proper leap second handling.
# Both zone flavors are always available as `posix/ZONE' and `right/ZONE'.
# This variable determines the default: if it's `/dev/null',
# ZONE==posix/ZONE; if it's `leapseconds', ZONE==right/ZONE.
ifndef leapseconds
leapseconds = /dev/null
endif

# What timezone's DST rules should be used when a POSIX-style TZ
# environment variable doesn't specify any rules.  For 1003.1 compliance
# this timezone must use rules that are as U.S. federal law defines DST.
# Run `make -C time echo-zonenames' to see a list of available zone names.
# This setting can be changed with `zic -p TIMEZONE' at any time.
# If you want POSIX.1 compatibility, use `America/New_York'.
ifndef posixrules
posixrules = America/New_York
endif

# Where to install the "posixrules" timezone file; this is file
# whose contents $(posixrules) specifies.  If this is a relative
# pathname, it is relative to $(zonedir).
ifndef posixrules-file
posixrules-file = posixrules
endif


# Directory where your system's native header files live.
# This is used on Unix systems to generate some GNU libc header files.
ifndef sysincludedir
sysincludedir = /usr/include
endif


# Commands to install files.
ifndef INSTALL_DATA
INSTALL_DATA = $(INSTALL) -m 644
endif
ifndef INSTALL_PROGRAM
INSTALL_PROGRAM = $(INSTALL)
endif
ifndef INSTALL
INSTALL = install
endif


# The name of the C compiler.
# If you've got GCC, and it works, use it.
ifeq ($(origin CC),default)
CC := gcc
endif

# The name of the C compiler to use for compilations of programs to run on
# the host that is building the library.  If you set CC to a
# cross-compiler, you must set this to the normal compiler.
ifndef BUILD_CC
BUILD_CC = $(CC)
endif

# Default flags to pass the C compiler.
ifndef default_cflags
default_cflags := -g -O
endif

# Flags to pass the C compiler when assembling preprocessed assembly code
# (`.S' files).  On some systems the assembler doesn't understand the `#' line
# directives the preprocessor produces.  If you have troubling compiling
# assembly code, try using -P here to suppress these directives.
ifndef asm-CPPFLAGS
asm-CPPFLAGS =
endif

# Installed name of the startup code.
ifneq ($(elf),yes)
# When not using ELF, there is just one startfile, called crt0.o.
start-installed-name = crt0.o
else
# In the ELF universe, crt0.o is called crt1.o, and there are
# some additional bizarre files.
start-installed-name = crt1.o
have-initfini = yes
endif


# Command for linking programs with the C library.
ifndef +link
+link = $(CC) -nostdlib -nostartfiles -o $@ \
	      $(sysdep-LDFLAGS) $(config-LDFLAGS) $(LDFLAGS)  \
	      $(addprefix $(csu-objpfx),$(start-installed-name)) \
	      $(+preinit) $(+prector) \
	      $(filter-out $(addprefix $(csu-objpfx),start.o \
						     $(start-installed-name))\
			   $(+preinit) $(link-extra-libs) \
			   $(common-objpfx)libc% $(+postinit),$^) \
	      $(link-extra-libs) $(link-libc) $(+postctor) $(+postinit)
endif
ifndef config-LDFLAGS
ifeq (yes,$(build-shared))
config-LDFLAGS = -Wl,-dynamic-linker=$(slibdir)/$(rtld-installed-name)
endif
endif
ifndef link-libc
ifeq (yes,$(build-shared))
# We need the versioned name of libc.so in the deps of $(others) et al
# so that the symlink to libc.so is created before anything tries to
# run the linked programs.
link-libc = -Wl,-rpath-link=$(rpath-link) \
	    $(common-objpfx)libc.so$(libc.so-version) \
	    $(elfobjdir)/$(rtld-installed-name) \
	    $(common-objpfx)libc.a $(gnulib)
# Choose the default search path for the dynamic linker based on
# where we will install libraries.
ifneq ($(libdir),$(slibdir))
default-rpath = $(slibdir):$(libdir)
else
default-rpath = $(libdir)
endif
# This is how to find at build-time things that will be installed there.
rpath-link = $(common-objdir):$(mathobjdir):$(elfobjdir):$(nssobjdir):$(dbobjdir)
mathobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)math)
elfobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)elf)
nssobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)nss)
dbobjdir := $(patsubst ../$(subdir),.,$(common-objpfx)db)
else
link-libc = $(common-objpfx)libc.a $(gnulib) $(common-objpfx)libc.a
endif
endif

ifndef link-extra-libs
ifeq (yes,$(build-shared))
ifneq ($(common-objpfx),$(objpfx))
link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),\
	$(wildcard $(common-objpfx)$(lib).so$($(notdir $(lib)).so-version) \
		   $(objpfx)$(lib).so$($(notdir $(lib)).so-version)))
else
link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).so$($(notdir $(lib)).so-version))
endif
else
link-extra-libs = $(foreach lib,$(LDLIBS-$(@F)),$(common-objpfx)$(lib).a)
endif
endif
ifndef gnulib
gnulib := -lgcc
endif
ifeq ($(elf),yes)
+preinit = $(addprefix $(csu-objpfx),crti.o)
+postinit = $(addprefix $(csu-objpfx),crtn.o)
+prector = `$(CC) --print-file-name=crtbegin.o`
+postctor = `$(CC) --print-file-name=crtend.o`
endif
csu-objpfx = $(common-objpfx)csu/
elf-objpfx = $(common-objpfx)elf/
db-objpfx = $(common-objpfx)db/

# How to run a program we just linked with our library.
# The program binary is assumed to be $(word 2,$^).
built-program-file = $(dir $(word 2,$^))$(notdir $(word 2,$^))
ifneq (yes,$(build-shared))
built-program-cmd = $(built-program-file)
else
comma = ,
sysdep-library-path = \
$(subst $(empty) ,:,$(strip $(patsubst -Wl$(comma)-rpath-link=%, %,\
				       $(filter -Wl$(comma)-rpath-link=%,\
						$(sysdep-LDFLAGS)))))
define built-program-cmd
LD_LIBRARY_PATH=$(rpath-link)$(patsubst %,:%,$(sysdep-library-path)) \
$(elf-objpfx)$(rtld-installed-name) $(built-program-file)
endef
endif

ifndef LD
LD := ld -X
endif

ifndef	RANLIB
RANLIB = ranlib
endif

# Extra flags to pass to GCC.
+gccwarn := -Wall -Wwrite-strings -Wno-parentheses -Winline -Wstrict-prototypes

# This is the program that generates makefile
# dependencies from C source files.
ifndef +mkdep
+mkdep = $(CC) -M
endif

# The program that makes Emacs-style TAGS files.
ETAGS	:= etags -T

# The `m4' macro processor; this is used by sysdeps/sparc/Makefile (and
# perhaps others) to preprocess assembly code in some cases.
M4 = m4

####
#### End of configuration variables.
####

# This tells some versions of GNU make before 3.63 not to export all variables.
.NOEXPORT:

# We want to echo the commands we're running without
# umpteen zillion filenames along with it (we use `...' instead)
# but we don't want this echoing done when the user has said
# he doesn't want to see commands echoed by using -s.
ifneq	"$(findstring s,$(MAKEFLAGS))" ""	# if -s
+cmdecho	:= echo >/dev/null
else						# not -s
+cmdecho	:= echo
endif	   					# -s

# These are the flags given to the compiler to tell
# it what sort of optimization and/or debugging output to do.
ifndef	+cflags
# If `CFLAGS' was defined, use that.
ifdef		CFLAGS
+cflags	:= $(filter-out -I%,$(CFLAGS))
endif		# CFLAGS
endif	# +cflags

# If none of the above worked, default to "-g -O".
ifeq	"$(strip $(+cflags))" ""
+cflags	:= $(default_cflags)
endif	# $(+cflags) == ""

+cflags := $(+cflags) $(+gccwarn)
+gcc-nowarn := -w

# Don't duplicate options if we inherited variables from the parent.
+cflags	:= $(sort $(+cflags))


# These are flags given to the C compiler to tell it to look for include
# files (including ones given in angle brackets) in the current directory,
# in the parent library source directory and in the include directory.
# `+sysdep-includes' will be defined by Makerules.
+includes = -I. $(patsubst %/,-I%,$(..)) -I$(..)include $($(stdio)-include) \
	    $(includes) $(+sysdep-includes) $(last-includes)

# Since libio has several internal header files, we use a -I instead
# of many little headers in the include directory.
libio-include = -I$(..)libio

# These are the variables that the implicit compilation rules use.
CPPFLAGS = $(+includes) $(defines) -include $(..)include/libc-symbols.h \
	   $(sysdep-CPPFLAGS) $(CPPFLAGS-$(suffix $@)) $(CPPFLAGS-$(<F)) \
	   $(CPPFLAGS-$(@F))
override CFLAGS	= $(+cflags) $(sysdep-CFLAGS) $(CFLAGS-$(suffix $@)) \
		  $(CFLAGS-$(<F)) $(CFLAGS-$(@F))


# This is the macro that the implicit linking rules use.
ifneq "$(filter -g,$(+cflags))" "" # -g is in $(+cflags)
LDFLAGS	:= -g
endif


# Enable object files for different versions of the library.
# Various things use $(object-suffixes) to know what all to make.
# The compilation rules use $(CPPFLAGS-${SUFFIX}) and $(CFLAGS-${SUFFIX})
# to pass different flags for each flavor.
libtypes = $(foreach o,$(object-suffixes),$(libtype$o))
object-suffixes := .o
all-object-suffixes := .o .so .po .go .bo
libtype.o := lib%.a
ifeq (yes,$(build-shared))
# Under --enable-shared, we will build a shared library of PIC objects.
# The PIC object files are named foo.so.
object-suffixes += .so
CPPFLAGS-.so = -DPIC
CFLAGS-.so = -fPIC -fno-common
libtype.so := lib%_pic.a
endif
ifeq (yes,$(build-profile))
# Under --enable-profile, we will build a static library of profiled objects.
# The profiled object files are named foo.po.
object-suffixes += .po
CPPFLAGS-.po = -DPROF
CFLAGS-.po = -pg
libtype.po = lib%_p.a
endif
ifeq (yes,$(build-omitfp))
# Under --enable-omitfp, we build an the library optimized without
# debugging information using -fomit-frame-pointer, and build an extra
# library with debugging information.  The debuggable objects are named foo.go.
object-suffixes += .go
CFLAGS-.go = -g
CFLAGS-.o = -g0 -O99 -fomit-frame-pointer
CFLAGS-.so += $(CFLAGS-.o)
libtype.go = lib%_g.a
endif
ifeq (yes,$(build-bounded))
# Under --enable-bounded, we build the library with `-fbounded-pointers -g'
# to runtime bounds checking.  The bounded-pointer objects are named foo.bo.
object-suffixes += .bo
CPPFLAGS-.bo = -DBOUNDED_POINTERS
CFLAGS-.bo = -g -fbounded-pointers
libtype.bo = lib%_b.a
endif


+gnu-stabs = $(shell echo>&2 '*** BARF ON ME')

ifndef BUILD_CC
BUILD_CC = $(CC)
endif

# Figure out the version numbers from version.h.

$(common-objpfx)version.mk: $(..)version.h $(..)Makeconfig
	sed -n -e 's/^.*RELEASE.*"\([^"]*\)".*$$/release=\1/p' \
	       -e 's/^.*VERSION.*"\([^"]*\)".*$$/version=\1/p' \
	    < $< > $@-new
	mv -f $@-new $@

ifeq (yes, $(build-shared))

# Process the shlib-versions file, which tells us what shared library
# version numbers to use when we install shared objects on this system.
-include $(common-objpfx)soversions.mk
$(common-objpfx)soversions.mk: $(..)shlib-versions $(..)Makeconfig \
			       $(wildcard $(patsubst %, $(..)%/shlib-versions,\
							$(add-ons))) \
			       $(common-objpfx)config.make
	(file="$(wildcard $(patsubst %,$(..)%/shlib-versions,$(add-ons))) \
	       $(..)shlib-versions"; \
	 for f in $$file; do \
	   sed 's/#.*$$//' $$f | while read conf versions; do \
	     test -n "$$versions" && \
	     test `expr '$(config-machine)-$(config-vendor)-$(config-os)' \
			: "$$conf"` != 0 || continue; \
	     for v in $$versions; do \
	       lib=`echo $$v | sed 's/=.*$$//'`; \
	       if eval "test -z \"\$$vers_lib$$lib\""; then \
		 eval vers_lib$${lib}=yes; \
		 number=`echo $$v | sed "s/^.*=//"`; \
		 case $$number in \
		   [0-9]*) echo "$$lib.so-version=.$$number"; \
			   echo "all-sonames+=$$lib.so\$$($$lib.so-version)";;\
		   *) echo "$$lib.so-version=$$number"; \
		      echo "all-sonames+=\$$($$lib.so-version)";;  \
	         esac; \
	       fi; \
	     done; \
	   done; \
	 done;) > $@T; exit 0
	mv -f $@T $@

# Get $(version) defined with the release version number.
-include $(common-objpfx)version.mk

# Generate the header containing the names of all shared libraries.
# We use a stamp file to avoid uncessary recompilations.
before-compile += $(common-objpfx)gnu/lib-names.h
$(common-objpfx)gnu/lib-names.h: $(common-objpfx)gnu/lib-names.stmp
$(common-objpfx)gnu/lib-names.stmp: $(common-objpfx)soversions.mk
	$(make-target-directory)
	@rm -f ${@:stmp=T} $@
	(echo '/* This file is automatically generated.';\
	 echo '   It defines macros to allow user program to find the shared';\
	 echo '   library files which come as part of GNU libc.  */';\
	 echo '#ifndef __GNU_LIB_NAMES_H'; \
	 echo '#define __GNU_LIB_NAMES_H	1'; \
	 echo; \
	 (libs='$(all-sonames)';\
	  for l in $$libs; do \
	    upname=`echo $$l | sed 's/[.]so.*//' | \
		    tr 'abcdefghijklmnopqrstuvwxyz-' \
		       'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`; \
	    echo "#define	$${upname}_SO	\"$$l\""; \
	  done;) | sort; \
	 echo; \
	 echo '#endif	/* gnu/lib-names.h */';) > ${@:stmp=T}
	if test -r ${@:stmp=h} && cmp -s ${@:stmp=h} ${@:stmp=T}; \
	then rm -f ${@:stmp=T}; \
	else mv -f ${@:stmp=T} ${@:stmp=h}; fi
	touch $@

common-generated += gnu/lib-names.h gnu/lib-names.stmp

# The name under which the run-time dynamic linker is installed.
# We are currently going for the convention that `/lib/ld.so.1'
# names the SVR4/ELF ABI-compliant dynamic linker.
ifndef rtld-installed-name
ifdef ld.so-version
rtld-installed-name = $(ld.so-version)
else
rtld-installed-name = ld.so.1
endif
endif

ifndef rtld-version-installed-name
rtld-version-installed-name = ld-$(version).so
endif

endif # build-shared

endif # Makeconfig not yet included