# Makefile for uClibc
#
-# Copyright (C) 2000 by Lineo, inc.
-# Copyright (C) 2000-2002 Erik Andersen <andersen@uclibc.org>
+# Copyright (C) 2000-2004 Erik Andersen <andersen@uclibc.org>
#
# This program 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
# You should have received a copy of the GNU Library General Public License
# along with this program; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-#
-# Derived in part from the Linux-8086 C library, the GNU C Library, and several
-# other sundry sources. Files within this library are copyright by their
-# respective copyright holders.
TOPDIR=../../
include $(TOPDIR)Rules.mak
LDSO_FULLNAME=ld-uClibc-$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL).so
-# Enable this to enable all the code needed to support traditional ldd
-# (i.e. where the shared library loader does all the heavy lifting)
-# Since this currently only saves about 300 bytes, I'm going to leave
-# it enabled...
-XXFLAGS+= -DLD_TRACE
-
-# Enable this to enable all the code needed for debugging the runtime
-# linking of an application using the LD_DEBUG environment variable:
-# LD_DEBUG=token1,token2,.. prog
-# enables diagnostics to the stderr.
-# For now there are these tokens possible:
-# bindings displays the resolve processing (function calls); detail shows the relocation patch
-# detail provide more information for some options
-# move display copy processings
-# reloc display relocation processing; detail shows the relocation patch
-# symbols display symbol table processing
-#
-# The additional environment variable:
-# LD_DEBUG_OUTPUT=file
-# redirects the diagnostics to an output file created using
-# the specified name and the process id as a suffix.
-#
-# try this
-# $ LD_DEBUG=binding,move,symbols,reloc,detail LD_DEBUG_OUTPUT=appname ./appname
-#
-#XXFLAGS+= -DSUPPORT_LD_DEBUG
+# reset to initial (disabling predefined CFLAGS)
+ASFLAGS=
+ifeq ($(UCLIBC_BUILD_NOEXECSTACK),y)
+ASFLAGS+=$(call check_as,--noexecstack)
+endif
-# Enable this for the very very early debugging. Really only useful
-# for people porting to new architectures.
-#XXFLAGS+= -DLD_DEBUG
+XXFLAGS=$(XWARNINGS) $(SSP_DISABLE_FLAGS)
+ifeq ($(DL_FINI_CRT_COMPAT),y)
+XXFLAGS+=-D_DL_FINI_CRT_COMPAT
+endif
-# Enable this to never actually fixup symbols...
-#XXFLAGS+= -DLD_NEVER_FIXUP_SYMBOLS
+ifeq ($(DODEBUG),y)
+# Not really much point in including debugging info, since gdb
+# can't really debug ldso, since gdb requires help from ldso to
+# debug things....
+XXFLAGS+=-Os -g3
+else
+XXFLAGS+=$(OPTIMIZATION)
+endif
+XXFLAGS+= $(XARCH_CFLAGS) $(CPU_CFLAGS) $(PICFLAG) \
+ -DUCLIBC_RUNTIME_PREFIX=\"$(RUNTIME_PREFIX)\" \
+ -fno-builtin -nostdinc -D_LIBC -I$(TOPDIR)ldso/include -I. -I$(TOPDIR)include
+
+# BEWARE!!! At least mips* will die if -O0 is used!!!
+XXFLAGS:=$(XXFLAGS:-O0=-O1)
+XXFLAGS+=-isystem $(shell $(CC) -print-file-name=include)
+LDFLAGS=$(CPU_LDFLAGS-y) -e _start -z now -Bsymbolic -shared --warn-common --export-dynamic --sort-common \
+ -z combreloc --discard-locals --discard-all --no-undefined
+ifeq ($(UCLIBC_BUILD_RELRO),y)
+ LDFLAGS+=-z relro
+endif
-XXFLAGS+=-DUCLIBC_TARGET_PREFIX=\"$(TARGET_PREFIX)\" \
- -DUCLIBC_DEVEL_PREFIX=\"$(DEVEL_PREFIX)\" \
- -DUCLIBC_BUILD_DIR=\"$(shell cd $(TOPDIR) && pwd)\"
-LDFLAGS=-shared --warn-common --export-dynamic --sort-common \
- -z combreloc --discard-locals --discard-all
-CSRC= ldso.c #hash.c readelflib1.c $(TARGET_ARCH)/elfinterp.c
+CSRC= ldso.c
COBJS=$(patsubst %.c,%.o, $(CSRC))
ASRC=$(shell ls $(TARGET_ARCH)/*.S)
AOBJS=$(patsubst %.S,%.o, $(ASRC))
OBJS=$(AOBJS) $(COBJS)
-ifeq ($(strip $(TARGET_ARCH)),cris)
-LDFLAGS+=-mcrislinux
+ifneq ($(strip $(SUPPORT_LD_DEBUG)),y)
+LDFLAGS+=-s
endif
-ifneq ($(strip $(DODEBUG)),true)
-LDFLAGS+=-s
+ifeq ($(strip $(SUPPORT_LD_DEBUG)),y)
+XXFLAGS+=-D__SUPPORT_LD_DEBUG__
endif
-all: lib
+ifeq ($(strip $(SUPPORT_LD_DEBUG_EARLY)),y)
+XXFLAGS+=-D__SUPPORT_LD_DEBUG_EARLY__
+endif
-lib:: ldso.h $(OBJS) $(DLINK_OBJS)
- $(LD) $(LDFLAGS) -e _dl_boot -soname=$(UCLIBC_LDSO) \
- -o $(LDSO_FULLNAME) $(OBJS) $(LIBGCC);
- install -d $(TOPDIR)lib
- install -m 755 $(LDSO_FULLNAME) $(TOPDIR)lib
- (cd $(TOPDIR)lib && ln -sf $(LDSO_FULLNAME) $(UCLIBC_LDSO))
+#This stuff will not work with -fomit-frame-pointer
+XXFLAGS := $(XXFLAGS:-fomit-frame-pointer=)
-ldso.h: Makefile
- echo "const char *_dl_progname=\""$(UCLIBC_LDSO)"\";" > ldso.h
- echo "#include \"$(TARGET_ARCH)/elfinterp.c\"" >> ldso.h
+all: $(LDSO_FULLNAME)
+$(LDSO_FULLNAME): $(OBJS) $(DLINK_OBJS)
+ $(LD) $(LDFLAGS) -soname=$(UCLIBC_LDSO) \
+ -o $(LDSO_FULLNAME) $(OBJS) $(LIBGCC)
+ $(INSTALL) -d $(TOPDIR)lib
+ $(INSTALL) -m 755 $(LDSO_FULLNAME) $(TOPDIR)lib
+ $(LN) -sf $(LDSO_FULLNAME) $(TOPDIR)lib/$(UCLIBC_LDSO)
$(COBJS): %.o : %.c
- $(CC) $(CFLAGS) $(XXFLAGS) -I. -I./$(TARGET_ARCH) -I../libdl -c $< -o $@
+ $(CC) $(XXFLAGS) -I../libdl -c $< -o $@
$(STRIPTOOL) -x -R .note -R .comment $*.o
$(AOBJS): %.o : %.S
- $(CC) $(CFLAGS) -I. -I./$(TARGET_ARCH) -I../libdl -c $< -o $@
+ $(CC) $(XXFLAGS) $(ASFLAGS) -I../libdl -c $< -o $@
$(STRIPTOOL) -x -R .note -R .comment $*.o
-ldso.o: ldso.c hash.c readelflib1.c $(TARGET_ARCH)/elfinterp.c \
- ld_hash.h ld_string.h ld_syscall.h ldso.h linuxelf.h
-
-clean::
- $(RM) -f $(UCLIBC_LDSO)* $(OBJS) $(LDSO_FULLNAME)* core *.o *.a *.s *.i ldso.h *~
+ldso.o: $(CSRC) dl-elf.c dl-hash.c dl-startup.c dl-debug.c \
+ $(TARGET_ARCH)/*.h $(TARGET_ARCH)/*.c $(TOPDIR)ldso/include/*.h
+clean:
+ $(RM) $(UCLIBC_LDSO)* $(OBJS) $(LDSO_FULLNAME)* core *.o *.a *.s *.i ldso.h *~
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