# Copyright (C) 1991, 1992 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., 675 Mass Ave,
# Cambridge, MA 02139, USA.

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

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

+included-Makeconfig := yes

ifdef subdir
.. := ../
endif

# You can put variables that are specific to a configuration in the file
# Makeconfig in the object directory for that configuration.  Variables
# that do not vary between different configurations at your site can be
# editted below.

ifndef ARCH
ifdef machine
ARCH = $(machine)
else
include $(..)config.status
endif
endif

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

ifneq ($(wildcard $(objdir)/Makeconfig),)
include $(objdir)/Makeconfig
endif
endif

#
#	These are the configuration variables.
#


# Common prefix for all installation directories.
ifndef prefix
prefix = /usr/local
endif

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

# Where to install the header files.  There are two sets of header files
# produced, an ANSI C set and a traditional C set.  ansi-incldir, if
# defined, is where to install the ANSI C set; trad-incldir, if defined, is
# where to install the traditional C set.  If you define both, you can
# install both sets, in different places.
ifndef ansi-incldir
ansi-incldir = $(prefix)/include
endif
ifndef trad-incldir
#trad-incldir = $(prefix)/include
endif

# Define if the library should install its own <stddef.h>.
# Do this unless you are using version 2.2 or later of GCC.
ifndef stddef.h
stddef.h = stddef.h
endif

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

# Where to install programs.
ifndef bindir
bindir = $(prefix)/bin
endif

# 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 $(datadir)/zoneinfo.
ifndef localtime-file
localtime-file = /etc/localtime
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.
ifndef posixrules
posixrules = US/Eastern
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 $(datadir)/zoneinfo.
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)
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 -pipe
endif

# These are preprocessor macros we want to predefine.
# Define HAVE_GNU_LD if using GNU ld (which you should do if possible).
# If you do this, you may need the GNU assembler as well.
# If you don't do this, your library won't work as well (and won't be strictly
# compliant with the ANSI C standard).
+defines = $(defines) -DHAVE_GNU_LD

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

# Command for linking programs with the C library.
ifndef +link
+link = $(CC) -nostdlib -o $@ $(objpfx)start.o $(^:lib=$(objpfx)libc.a) \
	-lgcc $(objpfx)libc.a
endif

ifndef LD
LD := ld -X
endif

ifndef	RANLIB
RANLIB = ranlib
endif

# Define non-empty if the C compiler understands -v (print version).
+cc_version = $(filter gcc,$(notdir $(firstword $(CC)))) # if using gcc

# Extra flags to pass to GCC.
+gccwarn := -Wall -Wwrite-strings -Wpointer-arith -Wstrict-prototypes
+gccopt := -fstrength-reduce

# 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

ifdef objdir
objpfx = $(objdir)/
libc.a = $(objpfx)libc.a
else
objpfx :=
libc.a = $(..)libc.a
endif

# We want to echo the commands we're running without
# umpteem 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".
ifeq	"$(strip $(+cflags))" ""
+cflags	:= $(+default_cflags)
endif	# $(+cflags) == ""

# If using gcc, add flags that only it will grok.
ifneq	"$(findstring gcc,$(CC))" ""
+cflags := $(+cflags) $(+gccwarn)
ifneq	"$(filter -O,$(+cflags))" ""
+cflags := $(+cflags) $(+gccopt)
endif
endif	# gcc

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


ifneq	"$(findstring v,$(MAKEFLAGS))" ""	# if -v
ifneq	"$(strip $(+cc_version))" ""
# If Make is telling us version info, tell the compiler to do so as well.
CC	:= $(CC) -v
endif	# +cc_version
endif						# -v

# 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
# and in the parent library source directory.
ifneq "$(..)" ""
+includes	= -I. -I$(patsubst %/,%,$(..)) $(includes)
else
+includes	= -I. $(includes)
endif


# These are the variables that the implicit compilation rules use.
CPPFLAGS = $(+includes) $(+defines) -DLIBC
override CFLAGS	= $(+cflags)


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


ifneq "$(filter -DHAVE_GNU_LD,$(CPPFLAGS))" ""
+gnu-stabs := yes
endif


endif # Makeconfig not yet included