Use top_builddir.

--HG--
branch : HEAD

src/Makefile.am

diff --git a/src/Makefile.am b/src/Makefile.am
index feb785f..c1ac51b 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,6 +1,6 @@
 bin_PROGRAMS=zipcmp zipmerge
 
 zipcmp_CPPFLAGS=-I${top_srcdir}/lib
-zipcmp_LDADD=../lib/libzip.la
+zipcmp_LDADD=${top_builddir}/lib/libzip.la
 zipmerge_CPPFLAGS=-I${top_srcdir}/lib
-zipmerge_LDADD=../lib/libzip.la
+zipmerge_LDADD=${top_builddir}/lib/libzip.la