diff -u qd-2.3.11/configure.ac\~ qd-2.3.11/configure.ac
--- qd-2.3.11/configure.ac~	2009-05-12 03:45:05.000000000 +1000
+++ qd-2.3.11/configure.ac	2010-11-03 10:24:01.000000000 +1000
@@ -312,7 +312,7 @@
 
 # libtool stuff
 # AC_DISABLE_SHARED
-# AC_PROG_LIBTOOL
+AC_PROG_LIBTOOL
 AC_PROG_RANLIB
 
 # Output
diff -u qd-2.3.11/src/Makefile.am\~ qd-2.3.11/src/Makefile.am
--- qd-2.3.11/src/Makefile.am~	2009-05-12 03:45:05.000000000 +1000
+++ qd-2.3.11/src/Makefile.am	2010-11-03 13:26:45.000000000 +1000
@@ -1,9 +1,9 @@
 SRC = c_dd.cpp c_qd.cpp dd_real.cpp dd_const.cpp \
       fpu.cpp qd_real.cpp qd_const.cpp util.cpp bits.cpp util.h
 
-lib_LIBRARIES = libqd.a
+lib_LTLIBRARIES = libqd.la
 
-libqd_a_SOURCES = $(SRC)
+libqd_la_SOURCES = $(SRC)
 
 AM_CPPFLAGS = -I$(top_builddir) -I$(top_builddir)/include -I$(top_srcdir)/include
 
diff -u qd-2.3.11/tests/Makefile.am\~ qd-2.3.11/tests/Makefile.am
--- qd-2.3.11/tests/Makefile.am~	2009-05-12 03:45:05.000000000 +1000
+++ qd-2.3.11/tests/Makefile.am	2010-11-03 13:56:03.000000000 +1000
@@ -1,4 +1,4 @@
-LDADD = $(top_builddir)/src/libqd.a
+LDADD = $(top_builddir)/src/libqd.la
 AM_CPPFLAGS = -I$(top_builddir) -I$(top_builddir)/include -I$(top_srcdir)/include
 
 TESTS = qd_test pslq_test c_test
@@ -17,7 +17,7 @@
 f_test_LINK=$(CXXLINK)
 f_test_LDADD = $(top_builddir)/fortran/libqdmod.a \
                $(top_builddir)/fortran/libqd_f_main.a \
-               $(LDADD) $(top_builddir)/src/libqd.a $(FCLIBS)
+               $(LDADD) $(top_builddir)/src/libqd.la $(FCLIBS)
 endif
 
 CLEANFILES=qd_timer quadt_test huge