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#!/bin/sh
#
# Manuel Novoa III Jan 2001
#
# The purpose of this script is to extract the object files from libgcc.a
# that are needed by the shared uClibc so that they won't be linked with
# each application.
#
# I'm sure people with better shell programming skills can improve this.
# Feel free! ;-) At this point though, it gets the job done for me.
#
# Possible problems (paranioa mode): Are any of the objects in libgcc.a
# needed to actually load the shared library on any archs?
#Enable this when debugging
#set -x
echo Finding missing symbols in libc.a ...
echo " partial linking..."
rm -f libc.ldr
$LD $LDFLAGS -r -o libc.ldr $CRTOBJS --whole-archive ../libc.a
if $NM --undefined-only libc.ldr 2>&1 | grep -v "main$" | grep -v "_GLOBAL_OFFSET_TABLE_$" | grep -v "_gp_disp" | grep -v "^etext$" | grep -v "^__gmon_start__$" > sym.need ; then
EXIT_WITH_ERROR=0
rm -f obj.need
touch obj.need
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
else
echo Symbol $SYM needed by libc.a but not found in libgcc.a
EXIT_WITH_ERROR=1
fi
done
if [ $EXIT_WITH_ERROR != 0 ]; then
exit $EXIT_WITH_ERROR
fi
else
echo No missing symbols found.
exit 0
fi
rm -rf tmp-gcc
mkdir tmp-gcc
(cd tmp-gcc && $AR -x $LIBGCC)
rm -f libgcc.ldr
echo Extracting referenced libgcc.a objects ...
rm -f obj.need.0
touch obj.need.0
cmp -s obj.need obj.need.0 ; state=$?
while [ -s obj.need ] && [ $state -ne 0 ] ; do
(cd tmp-gcc && cat ../obj.need | sort | uniq | xargs $LD $LDFLAGS -r -o ../libgcc.ldr)
cp obj.need obj.need.0
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 $SYM" in " | cut -d' ' -f3 >> obj.need
fi
done
fi
cmp -s obj.need obj.need.0 ; state=$?
done
cat obj.need | sort | uniq > obj.need.0
(cd tmp-gcc && cp `cat ../obj.need` ..)
if [ -s obj.need.0 ] ; then
echo Objects added from $LIBGCC:
cat obj.need.0
(cd tmp-gcc && cat ../obj.need | sort | uniq | xargs $AR r ../libgcc-need.a)
else
echo No objects added from $LIBGCC.
fi
if [ -s sym.need ] ; then
echo Symbols missing from libgcc.a:
cat sym.need
else
echo Done
fi
exit 0
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