#!/bin/sh
# Check elf files

if [ -z "$RPM_BUILD_ROOT" ]; then
    echo "No build root defined" >&2
    exit 1
fi

if [ ! -d "$RPM_BUILD_ROOT" ]; then
    echo "Invalid build root" >&2
    exit 1
fi

LIB="`rpm --eval %{_lib}`"
export LD_LIBRARY_PATH="$RPM_BUILD_ROOT/$LIB:$RPM_BUILD_ROOT/usr/$LIB"


# TODO: would be nicer to search through files only once..
find "$RPM_BUILD_ROOT" -type f \( -executable -o -name \*.so\* \) -a \
	\( ! -path $RPM_BUILD_ROOT/usr/lib/debug/\* -a \
	   ! -path $RPM_BUILD_ROOT/usr/src/debug/\* \) \
	-print0 |
xargs  --no-run-if-empty -0 file -N -L |
grep -e '\.so.*: ELF.*shared' -e ': ELF.*executable' |
while read match; do
path="`echo $match | sed -e 's#\(\.so.*\): ELF.*shared.*#\1#' -e 's#: ELF.*executable.*##'`"
syspath="`echo $path | sed -e \"s#^$RPM_BUILD_ROOT##\"`"
if echo $match | grep -q -e ': ELF'; then
    unused_libs="`ldd -u -r $path 2> /dev/null | grep /`"
    if [ -n "$unused_libs" ]; then
    	echo "Warning: unused libraries in $syspath: " >&2
	echo "$unused_libs" >&2
    fi
fi
done

find "$RPM_BUILD_ROOT" -type f -name \*.so\*  -a \
	\( ! -path $RPM_BUILD_ROOT/usr/lib/debug/\* -a \
	   ! -path $RPM_BUILD_ROOT/usr/src/debug/\* \) \
	-print0 |
xargs  --no-run-if-empty -0 file -N -L |
grep -e '\.so.*: ELF.*shared' |
while read match; do
path="`echo $match | sed -e 's#\(\.so.*\): ELF.*shared.*#\1#'`"
syspath="`echo $path | sed -e \"s#^$RPM_BUILD_ROOT##\"`"
unused_libs="`ldd -u -r $path 2> /dev/null | grep /`"
undefined_symbols="`ldd -r $path 2>&1 | grep '^undefined symbol: '| sed -e 's#^undefined symbol:##g' -e \"s#($path).*##g\" | tr -d '\n' | tr -d '\t'`"
if [ -n "$undefined_symbols" ]; then
    echo "Warning: undefined symbols in $syspath:$undefined_symbols" >&2
fi
done