134 lines
4.7 KiB
Plaintext
134 lines
4.7 KiB
Plaintext
# Subroutine makefile for compiling libc modules linked into dynamic linker.
|
|
|
|
# Copyright (C) 2002, 2003, 2005, 2006 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 Lesser General Public
|
|
# License as published by the Free Software Foundation; either
|
|
# version 2.1 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
|
|
# Lesser General Public License for more details.
|
|
|
|
# You should have received a copy of the GNU Lesser General Public
|
|
# License along with the GNU C Library; if not, write to the Free
|
|
# Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
# 02111-1307 USA.
|
|
|
|
# This makefile is never used by itself, but only from the rtld-libc.a
|
|
# rule in Makefile, which does make -f librtld.mk -f rtld-Rules.
|
|
# librtld.mk is the generated file containing variable definitions for
|
|
# `rtld-subdirs', a subset of the top-level $(subdirs) list; and for each
|
|
# SUBDIR in $(rtld-subdirs), `rtld-SUBDIR' listing `module.os' file names.
|
|
|
|
.PHONY: rtld-all
|
|
rtld-all:
|
|
|
|
# When run from the elf/Makefile to build rtld-libc.a, $(subdir) is elf.
|
|
ifneq ($(subdir),elf)
|
|
ifndef rtld-modules
|
|
error rtld-modules not set
|
|
endif
|
|
endif
|
|
|
|
ifndef rtld-modules
|
|
# Running to build rtld-libc.a, driving runs of $(rtld-subdir-make), below.
|
|
|
|
ifndef rtld-subdirs
|
|
error This makefile is a subroutine of elf/Makefile not to be used directly
|
|
endif
|
|
|
|
include ../Makeconfig
|
|
|
|
rtld-all: $(objpfx)rtld-libc.a
|
|
|
|
$(objpfx)rtld-libc.a: $(foreach dir,$(rtld-subdirs),\
|
|
$(addprefix $(common-objpfx)$(dir)/rtld-,\
|
|
$(rtld-$(dir))))
|
|
@-rm -f $@T
|
|
$(AR) cq$(verbose) $@T $^
|
|
$(RANLIB) $@T
|
|
mv -f $@T $@
|
|
|
|
# Use the verbose option of ar and tar when not running silently.
|
|
ifeq "$(findstring s,$(MAKEFLAGS))" "" # if not -s
|
|
verbose := v
|
|
else # -s
|
|
verbose :=
|
|
endif # not -s
|
|
|
|
|
|
# For each subdirectory, define a pattern rule that makes all of that
|
|
# subdirectory's modules at once with one recursive make command.
|
|
object-suffixes-left := $(rtld-subdirs)
|
|
define o-iterator-doit
|
|
$(foreach obj,$(rtld-$o),$(common-objpfx)%/rtld-$(obj)): FORCE ; \
|
|
+$$(rtld-subdir-make)
|
|
endef
|
|
include $(patsubst %,../o-iterator.mk,$(object-suffixes-left))
|
|
|
|
# This is how we descend into each subdirectory. See below.
|
|
define rtld-subdir-make
|
|
$(MAKE) $(subdir-args) objdir=$(objdir) \
|
|
-f Makefile -f ../elf/rtld-Rules rtld-all \
|
|
rtld-modules='$(addprefix rtld-,$(rtld-$*))'
|
|
endef
|
|
|
|
# See subdir-target-args in ../Makefile for the model.
|
|
subdir-args = subdir=$*$(if $($*-srcdir),\
|
|
-C $($*-srcdir) ..=`pwd`/,\
|
|
-C $(..)$* ..=../)
|
|
|
|
FORCE:
|
|
|
|
else
|
|
|
|
# In this case we are being run by $(rtld-subdir-make), above.
|
|
# Some other subdir's Makefile has provided all its normal rules,
|
|
# and we just provide some additional definitions.
|
|
|
|
# These are the basic compilation rules corresponding to the Makerules ones.
|
|
# The sysd-rules generated makefile already defines pattern rules for rtld-%
|
|
# targets built from sysdeps source files.
|
|
$(objpfx)rtld-%.os: %.S $(before-compile); $(compile-command.S)
|
|
$(objpfx)rtld-%.os: %.s $(before-compile); $(compile-command.s)
|
|
$(objpfx)rtld-%.os: %.c $(before-compile); $(compile-command.c)
|
|
|
|
# The rules for generated source files.
|
|
$(objpfx)rtld-%.os: $(objpfx)%.S $(before-compile); $(compile-command.S)
|
|
$(objpfx)rtld-%.os: $(objpfx)%.s $(before-compile); $(compile-command.s)
|
|
$(objpfx)rtld-%.os: $(objpfx)%.c $(before-compile); $(compile-command.c)
|
|
|
|
# The command line setting of rtld-modules (see above) tells us
|
|
# what we need to build, and that tells us what dependency files we need.
|
|
rtld-all: $(addprefix $(objpfx),$(rtld-modules))
|
|
|
|
# Figure out the dependency files we need. After respecting the $(omit-deps)
|
|
# list as applied to the names without the `rtld-', there may be none left.
|
|
rtld-depfiles := $(patsubst %,$(objpfx)rtld-%.os.d,\
|
|
$(filter-out $(omit-deps),\
|
|
$(rtld-modules:rtld-%.os=%)))
|
|
rtld-depfiles := $(strip $(wildcard $(rtld-depfiles)) \
|
|
$(patsubst %.dt,%.d,\
|
|
$(wildcard $(rtld-depfiles:.d=.dt))))
|
|
ifdef rtld-depfiles
|
|
-include $(rtld-depfiles)
|
|
endif
|
|
|
|
# Just in case we wind up e.g. regenerating dependencies for non-rtld objects,
|
|
# we don't unconditionally modify the flags. For rtld-% targets, use the
|
|
# special flags set below.
|
|
CFLAGS += $(if $(filter rtld-%,$(@F)),$(CFLAGS-rtld))
|
|
CPPFLAGS += $(if $(filter rtld-%,$(@F)),$(CPPFLAGS-rtld))
|
|
|
|
|
|
# This here is the whole point of all the shenanigans.
|
|
CPPFLAGS-rtld := -DNOT_IN_libc=1 -DIS_IN_rtld=1
|
|
CFLAGS-rtld := # blah
|
|
|
|
|
|
endif
|