fix makefile for ubuntu

makefile

@@ -36,7 +36,7 @@ CPPUNIT_EXISTS = $(shell g++ -c -o /dev/null -xc++ - <<< \\\#include\ \<cppunit/
 ifneq (0, $(CPPUNIT_EXISTS))
 $(error You need cppunit installed)
 endif
-CPPUNIT_SO_TMP = $(shell ld --verbose | grep SEARCH | tr \  \\\n | sed \s/SEARCH_DIR\(\"\\\(.*\\\)\"\)\;/\\\1/g\ | sort -u | sed \s/$$/\\/libcppunit.so/g\)
+CPPUNIT_SO_TMP = $(shell ld --verbose | grep SEARCH | tr \  \\\n | sed s/SEARCH_DIR//g | sed s/\(\\\"//g | sed s/\\\"\)\\\;//g | sed s/^=//g | sort -u | sed \s/$$/\\/libcppunit.so/g\)
 CPPUNIT_SO_EXISTS = $(shell ls $(CPPUNIT_SO_TMP) 2>/dev/null | wc -l)
 ifeq (0, $(CPPUNIT_SO_EXISTS))
 $(error You need cppunit installed)