diff options
Diffstat (limited to 'elf/rtld-Rules')
| -rw-r--r-- | elf/rtld-Rules | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/elf/rtld-Rules b/elf/rtld-Rules new file mode 100644 index 0000000000..03fe25d5cd --- /dev/null +++ b/elf/rtld-Rules @@ -0,0 +1,115 @@ +# Subroutine makefile for compiling libc modules linked into dynamic linker. + +# Copyright (C) 2002 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, $(subdir) is elf. +ifeq ($(subdir),elf) + +ifndef rtld-subdirs +error This is 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 $@T $^ + $(RANLIB) $@T + mv -f $@T $@ + +# 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 +$(MAKE) -C ../$* objdir=$(objdir) -f Makefile -f ../elf/rtld-Rules rtld-all \ + rtld-modules='$(addprefix rtld-,$(rtld-$*))' +endef + +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-%.d: %.S $(before-compile); $(+make-deps) +$(objpfx)rtld-%.os: %.s $(before-compile); $(compile-command.s) +$(objpfx)rtld-%.d: %.s $(before-compile); $(+make-deps) +$(objpfx)rtld-%.os: %.c $(before-compile); $(compile-command.c) +$(objpfx)rtld-%.d: %.c $(before-compile); $(+make-deps) + +# The rules for generated source files. +$(objpfx)rtld-%.os: $(objpfx)%.S $(before-compile); $(compile-command.S) +$(objpfx)rtld-%.d: $(objpfx)%.S $(before-compile); $(+make-deps) +$(objpfx)rtld-%.os: $(objpfx)%.s $(before-compile); $(compile-command.s) +$(objpfx)rtld-%.d: $(objpfx)%.s $(before-compile); $(+make-deps) +$(objpfx)rtld-%.os: $(objpfx)%.c $(before-compile); $(compile-command.c) +$(objpfx)rtld-%.d: $(objpfx)%.c $(before-compile); $(+make-deps) + +# 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-%.d,\ + $(filter-out $(omit-deps),\ + $(rtld-modules:rtld-%.os=%))) +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 |