Patch from Stefan Allius for libgcc multilib support

    this is the last patch, we need to make the support of multitarget libgcc
    complete.

    ---------------------------------
    In ldso/ldso/Makefile
      I added the CPU_LDFLAGS-y to the LDFLAGS
    ---------------------------------
    In libc/Makefile
      I set the LDFLAGS for the script get-needed-objects.sh with CPU_LDFLAGS-y
    ---------------------------------
    In extra/scripts/get-needed-object.sh
      we now use the LIBGCC from Rules.mak and call LD with LDFLAGS
      (==CPU_LDFLAGS-y). Addtionally I grep the NM output, to fix the unresolved
      external __GLOBAL_OFFSET_TABLE__ on SuperH targets.
    ---------------------------------

extra/scripts/get-needed-libgcc-objects.sh

@@ -15,12 +15,10 @@
 #Enable this when debugging
 #set -x
 
-LIBGCC=`$CC -print-libgcc-file-name`
-
 echo Finding missing symbols in libc.a ...
 echo "    partial linking..."
 rm -f libc.ldr
-$LD -r -o libc.ldr ../../lib/crt0.o ../../lib/crti.o ../../lib/crtn.o --whole-archive ../libc.a
+$LD $LDFLAGS -r -o libc.ldr ../../lib/crt0.o ../../lib/crti.o ../../lib/crtn.o --whole-archive ../libc.a
 
 if $NM --undefined-only libc.ldr 2>&1 | grep -v "^main$" | grep -v "^_GLOBAL_OFFSET_TABLE_$" | grep -v "_gp_disp" > sym.need ; then
     EXIT_WITH_ERROR=0
@@ -54,9 +52,9 @@ touch obj.need.0
 
 cmp -s obj.need obj.need.0 ; state=$?
 while [ -s obj.need ] && [ $state -ne 0 ] ; do
-    (cd tmp-gcc && cat ../obj.need | sort | uniq | xargs $LD -r -o ../libgcc.ldr)
+    (cd tmp-gcc && cat ../obj.need | sort | uniq | xargs $LD $LDFLAGS -r -o ../libgcc.ldr)
     cp obj.need obj.need.0
-    if $NM --undefined-only libgcc.ldr > sym.need 2>&1 ; then
+    if $NM --undefined-only libgcc.ldr | grep -v "^_GLOBAL_OFFSET_TABLE_$" > sym.need 2>&1 ; then
 	for SYM in `cat sym.need | sed -e 's/ U //g'` ; do
 	    if $NM -s $LIBGCC 2>&1 | grep -q $SYM" in " ; then
 		$NM -s $LIBGCC 2>&1 | grep $SYM" in " | cut -d' ' -f3 >> obj.need

ldso/ldso/Makefile

@@ -31,7 +31,7 @@ LDSO_FULLNAME=ld-uClibc-$(MAJOR_VERSION).$(MINOR_VERSION).$(SUBLEVEL).so
 XXFLAGS+=-DUCLIBC_TARGET_PREFIX=\"$(TARGET_PREFIX)\" \
 	-DUCLIBC_DEVEL_PREFIX=\"$(DEVEL_PREFIX)\" \
 	-DUCLIBC_BUILD_DIR=\"$(shell cd $(TOPDIR) && pwd)\"
-LDFLAGS=-shared --warn-common --export-dynamic --sort-common \
+LDFLAGS=$(CPU_LDFLAGS-y) -shared --warn-common --export-dynamic --sort-common \
 	-z combreloc --discard-locals --discard-all
 CSRC= ldso.c #hash.c readelflib1.c $(TARGET_ARCH)/elfinterp.c
 COBJS=$(patsubst %.c,%.o, $(CSRC))

libc/Makefile

@@ -49,7 +49,7 @@ shared: $(TOPDIR)lib/$(LIBNAME)
 	@rm -rf tmp
 	@mkdir tmp
 	$(AR) rv ./tmp/libgcc-need.a
-	@(cd tmp && CC=$(CC) LD=$(LD) NM=$(NM) AR=$(AR) LIBGCC=$(LIBGCC) \
+	@(cd tmp && CC=$(CC) LD=$(LD) LDFLAGS=$(CPU_LDFLAGS-y) NM=$(NM) AR=$(AR) LIBGCC=$(LIBGCC) \
 		/bin/sh $(TOPDIR)../extra/scripts/get-needed-libgcc-objects.sh)
 	$(LD) $(LDFLAGS) $(VERSION_SCRIPT) -soname=$(SHARED_MAJORNAME) -o $(SHARED_FULLNAME) \
 		--whole-archive ./tmp/libgcc-need.a $(LIBNAME) --no-whole-archive \