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