# 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.

#
#	Rules for making a subdirectory in the GNU C library.
#	Each subdirectory Makefile defines some variables and includes this.
#
ifneq (,)
This makefile requires GNU Make.
endif

all: # Don't let the default goal come from Makeconfig.

include ../Makeconfig

ifndef	subdir
Each subdirectory makefile must define the `subdir' variable.
endif
# This ` unconfuses emacs.
# This is benign and useless in GNU make before 3.63.
export subdir := $(subdir)

# This is the default target; it makes the library and auxiliary programs.
.PHONY: all
all: objs lib others

ifeq ($(build-programs),yes)
others: $(addprefix $(objpfx),$(extra-objs) \
			      $(install-lib) $(install-bin) \
			      $(install-rootsbin) $(install-sbin))
else
others: $(addprefix $(objpfx),$(extra-objs) \
			      $(install-lib))
endif

ifneq	"$(findstring env,$(origin headers))" ""
headers :=
endif

ifneq	"$(findstring env,$(origin generated))" ""
generated :=
endif

ifneq	"$(findstring env,$(origin common-generated))" ""
common-generated :=
endif

include ../Makerules

.PHONY: subdir_lib
subdir_lib: lib-noranlib

# Some subdirs need to install a dummy library.
# They can use "$(objpfx)libfnord.a: $(dep-dummy-lib); $(make-dummy-lib)".
dep-dummy-lib = $(common-objpfx)dummy.o
define make-dummy-lib
$(AR) cr$(verbose) $@ $<
endef

$(common-objpfx)dummy.c:
	rm -f $@
	echo 'void __dummy__ (void) { }' > $@
$(common-objpfx)empty.c:
	cp -f /dev/null $@
common-generated += dummy.o dummy.c empty.c \
		    $(addprefix empty,$(object-suffixes))

# This makes all the auxiliary and test programs.

.PHONY: others tests
ifeq ($(build-programs),yes)
others: $(addprefix $(objpfx),$(others) $(sysdep-others) $(extra-objs))
else
others: $(addprefix $(objpfx),$(extra-objs))
endif
ifeq ($(cross-compiling),yes)
tests: $(addprefix $(objpfx),$(tests) $(test-srcs))
else
tests: $(tests:%=$(objpfx)%.out)
endif

ifeq ($(build-programs),yes)
binaries-all = $(others) $(sysdep-others) $(tests) $(test-srcs)
binaries-static = $(others-static)
else
binaries-all = $(tests) $(test-srcs)
binaries-static =
endif

binaries-shared = $(filter-out $(binaries-static), $(binaries-all))

ifneq "$(strip $(binaries-shared))" ""
$(addprefix $(objpfx),$(binaries-shared)): %: %.o \
  $(sort $(filter $(common-objpfx)lib%,$(link-libc))) \
  $(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
	$(+link)
endif

ifneq "$(strip $(binaries-static))" ""
$(addprefix $(objpfx),$(binaries-static)): %: %.o \
  $(sort $(filter $(common-objpfx)lib%,$(link-libc-static))) \
  $(addprefix $(csu-objpfx),start.o) $(+preinit) $(+postinit)
	$(+link-static)
endif

ifneq "$(strip $(tests) $(test-srcs))" ""
# These are the implicit rules for making test outputs
# from the test programs and whatever input files are present.
$(objpfx)%.out: %.args $(objpfx)% %.input
	$($*-ENV) $(built-program-cmd) `cat $(word 1,$^)` < $(word 3,$^) > $@
$(objpfx)%.out: %.args $(objpfx)%
	$($*-ENV) $(built-program-cmd) `cat $(word 1,$^)` > $@
$(objpfx)%.out: %.input $(objpfx)%
	$($*-ENV) $(built-program-cmd) < $(word 1,$^) > $@
$(objpfx)%.out: /dev/null $(objpfx)%	# Make it 2nd arg for canned sequence.
	$($*-ENV) $(built-program-cmd) > $@
endif	# tests

.PHONY: distclean realclean subdir_distclean subdir_realclean \
	subdir_clean subdir_mostlyclean subdir_testclean
subdir_mostlyclean: mostlyclean
subdir_clean: clean
subdir_distclean: distclean
subdir_realclean: realclean
subdir_testclean: do-tests-clean
realclean: distclean
distclean: clean

.PHONY: subdir_echo-headers
subdir_echo-headers: echo-headers

.PHONY: subdir_echo-distinfo
subdir_echo-distinfo:
	@echo $(addprefix +header+,$(headers) $(filter %.h,$(distribute))) \
	      $(addprefix +nodist+,$(generated) $(common-generated) $(dont_distribute))

# We want to install everything except the library itself, but update all
# our portions of the library because the parent make will install it later
# (likewise the stubs file).
.PHONY: subdir_install
subdir_install: install-no-libc.a lib-noranlib stubs

.PHONY: subdir_TAGS subdir_dist
subdir_TAGS: TAGS
subdir_dist: dist

# Convenient target to update all the generated source files.
.PHONY: generated
generated: $(addprefix $(common-objpfx),$(common-generated)) \
	$(addprefix $(objpfx),$(generated))

# Target required by the Hurd to ensure that all the MiG-generated
# headers are in place before building a subdirectory.
.PHONY: before-compile
before-compile: $(before-compile)

$(common-objpfx)dummy.o: $(common-objpfx)dummy.c $(before-compile);
	$(compile-command.c)

define o-iterator-doit
$(common-objpfx)empty$o: $(common-objpfx)empty.c $(before-compile);
	$$(compile-command.c)
endef
object-suffixes-left := $(object-suffixes)
include $(o-iterator)

# There's no good place to put this - here will do.
# The dependencies are wrong if it's run from the top level.
ifeq ($(filter %posix, $(sysdirs)),)
L_tmpnam  = 1
TMP_MAX   = 0
L_ctermid = 1
L_cuserid = 1
else
L_tmpnam  = 20
TMP_MAX   = 238328
L_ctermid = 9
L_cuserid = 9
endif
stdio_lim = $(common-objpfx)bits/stdio_lim.h

$(stdio_lim:lim.h=%.h) $(stdio_lim:lim.h=%.d): $(stdio_lim:lim.h=%.st); @:
$(stdio_lim:h=st): $(..)stdio-common/stdio_lim.h.in $(..)Rules \
		   $(common-objpfx)config.make
	$(make-target-directory)
	echo '#include "$(..)posix/bits/posix1_lim.h"' |		\
	SUNPRO_DEPENDENCIES='$(@:st=dT) $@'				\
	$(CC) $(+includes) -E -dM -xc - -o $(@:st=hT)
ifdef sed-remove-objpfx
	sed $(sed-remove-objpfx) $(@:st=dT) > $(@:st=dt)
	mv -f $(@:st=dt) $(@:st=d)
else
	mv -f $(@:st=dT) $(@:st=d)
endif
	fopen_max=`sed -n 's/^#define OPEN_MAX //p' $(@:st=hT)`; 	\
	filename_max=`sed -n 's/^#define PATH_MAX //p' $(@:st=hT)`;	\
	fopen_max=$${fopen_max:-16};					\
	filename_max=$${filename_max:-1024};				\
	sed -e "s/@FOPEN_MAX@/$$fopen_max/"				\
	    -e "s/@FILENAME_MAX@/$$filename_max/"			\
	    -e "s/@L_tmpnam@/$(L_tmpnam)/"				\
	    -e "s/@TMP_MAX@/$(TMP_MAX)/"				\
	    -e "s/@L_ctermid@/$(L_ctermid)/"				\
	    -e "s/@L_cuserid@/$(L_cuserid)/"				\
	    $< > $(@:st=h.new)
	$(move-if-change) $(@:st=h.new) $(@:st=h)
# Remove these last so that they can be examined if something went wrong.
	rm -f $(@:st=hT) $(@:st=dT)
	touch $@
# Get dependencies.
ifndef no_deps
-include $(stdio_lim:h=d)
endif
common-generated += bits/stdio_lim.h bits/stdio_lim.d bits/stdio_lim.st
