path: root/Makerules

# Copyright (C) 1991,92,93,94,95,96,97,98,99 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.

#
#	Common rules for making the GNU C library.  This file is included
#	by the top-level Makefile and by all subdirectory makefiles
#	(through Rules).
#
ifneq (,)
This makefile requires GNU Make.
endif

REQUIRED_MAKE_VERSION = 3.74
REAL_MAKE_VERSION = $(firstword $(MAKE_VERSION))

ifneq ($(REQUIRED_MAKE_VERSION), \
       $(firstword $(sort $(REAL_MAKE_VERSION) $(REQUIRED_MAKE_VERSION))))
Wrong GNU Make version.  See above for the version needed.
endif


ifdef	subdir
..	:= ../
endif	# subdir

# If `sources' was defined by the parent makefile, undefine it so
# we will later get it from wildcard search in this directory.
ifneq	"$(findstring env,$(origin sources))" ""
sources :=
endif

oPATH := $(PATH)
PATH := this definition should take precedence over $(oPATH)
ifeq ($(PATH),$(oPATH))
You must not use the -e flag when building the GNU C library.
else
PATH := $(oPATH)
endif

ifndef +included-Makeconfig
include $(..)Makeconfig
endif

# `configure' writes a definition of `config-sysdirs' in `config.make'.
sysdirs = $(strip $(full-config-sysdirs))

+sysdir_pfx = $(common-objpfx)

export sysdirs := $(sysdirs)

+sysdep_dirs := $(full-config-sysdirs)
ifdef objdir
+sysdep_dirs := $(objdir) $(+sysdep_dirs)
endif

# Add -I switches to get the right sysdep directories.
# `+includes' in Makeconfig references $(+sysdep-includes).
+sysdep-includes := $(addprefix -I,$(+sysdep_dirs))

# This variable is used in ``include $(o-iterator)'' after defining
# $(o-iterator-doit) to produce some desired rule using $o for the object
# suffix, and setting $(object-suffixes-left) to $(object-suffixes); a copy
# is produced for each object suffix in use.
o-iterator = $(patsubst %,$(..)o-iterator.mk,$(object-suffixes-left))

# Include any system-specific makefiles.

# This is here so things in sysdep Makefiles can easily depend on foo.h as
# appropriate and not worry about where foo.h comes from, which may be
# system dependent and not known by that Makefile.
vpath %.h $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
				      $(+sysdep_dirs) $(..)))

# The same is true for RPC source files.
vpath %.x $(subst $(empty) ,:,$(strip $(common-objpfx) $(objpfx) \
				      $(+sysdep_dirs) $(..)))

# Some sysdep makefiles use this to distinguish being included here from
# being included individually by a subdir makefile (hurd/Makefile needs this).
in-Makerules := yes

-include $(+sysdir_pfx)sysd-Makefile
ifndef avoid-generated
ifneq ($(sysd-Makefile-sysdirs),$(config-sysdirs))
sysd-Makefile-force = FORCE
FORCE:
endif
$(+sysdir_pfx)sysd-Makefile: $(+sysdir_pfx)config.make $(..)Makerules \
			     $(sysd-Makefile-force)
	-@rm -f $@T
	(echo 'sysd-Makefile-sysdirs := $(config-sysdirs)';		      \
	 for file in $(config-sysdirs:=/Makefile); do  			      \
	   if [ -f $(..)$$file ]