diff -U3 -r qd-2.3.22.orig/configure.ac qd-2.3.22/configure.ac
--- qd-2.3.22.orig/configure.ac	2018-10-30 23:01:31.000000000 +0700
+++ qd-2.3.22/configure.ac	2018-11-09 21:45:39.415092314 +0700
@@ -18,14 +18,14 @@
 
 AC_CONFIG_AUX_DIR(config)
 AM_INIT_AUTOMAKE([nostdinc foreign])
-AM_CONFIG_HEADER([config.h])
-AM_CONFIG_HEADER([include/qd/qd_config.h])
+AC_CONFIG_HEADERS([config.h])
+AC_CONFIG_HEADERS([include/qd/qd_config.h])
 
 AC_CANONICAL_HOST
 
 # Checks for arguments
 # --enable-inline
-AC_ARG_ENABLE(enable_inline, AC_HELP_STRING(--enable-inline, [inline commonly used functions.  [[default=yes]]]))
+AC_ARG_ENABLE([inline], AS_HELP_STRING(--enable-inline, [inline commonly used functions.  [[default=yes]]]))
 AC_MSG_CHECKING([if commonly used function is to be inlined])
 if test "$enable_inline" != "no"; then
   enable_inline="yes"
@@ -34,7 +34,7 @@
 AC_MSG_RESULT($enable_inline)
 
 # --enable-ieee-add
-AC_ARG_ENABLE(enable_ieee_add, AC_HELP_STRING(--enable-ieee-add, [use addition that satisfies IEEE-style error bound instead of Cray-style error bound.  [[default=no]]]))
+AC_ARG_ENABLE([ieee-add], AS_HELP_STRING(--enable-ieee-add, [use addition that satisfies IEEE-style error bound instead of Cray-style error bound.  [[default=no]]]))
 AC_MSG_CHECKING([if addition with IEEE-style error bound is to be used])
 if test "$enable_ieee_add" = "yes"; then
   AC_DEFINE([QD_IEEE_ADD], [1], [Define to 1 to use additions with IEEE-style error bounds.])
@@ -44,7 +44,7 @@
 AC_MSG_RESULT($enable_ieee_add)
 
 # --enable-sloppy-mul
-AC_ARG_ENABLE(enable_sloppy_mul, AC_HELP_STRING(--enable-sloppy-mul, [use fast but slightly inaccurate multiplication.  [[default=yes]]]))
+AC_ARG_ENABLE([sloppy-mul], AS_HELP_STRING(--enable-sloppy-mul, [use fast but slightly inaccurate multiplication.  [[default=yes]]]))
 AC_MSG_CHECKING([if sloppy multiplication is to be used])
 if test "$enable_sloppy_mul" != "no"; then
   enable_sloppy_mul="yes"
@@ -53,7 +53,7 @@
 AC_MSG_RESULT($enable_sloppy_mul)
 
 # --enable-sloppy-div
-AC_ARG_ENABLE(enable_sloppy_div, AC_HELP_STRING(--enable-sloppy-div, [use fast but slightly inaccurate division.  [[default=yes]]]))
+AC_ARG_ENABLE([sloppy-div], AS_HELP_STRING(--enable-sloppy-div, [use fast but slightly inaccurate division.  [[default=yes]]]))
 AC_MSG_CHECKING([if sloppy division is to be used])
 if test "$enable_sloppy_div" != "no"; then
   enable_sloppy_div="yes"
@@ -63,7 +63,7 @@
 
 
 # --enable-debug
-AC_ARG_ENABLE(enable_debug, AC_HELP_STRING(--enable-debug, [enable debugging code. [[default=no]]]))
+AC_ARG_ENABLE([debug], AS_HELP_STRING(--enable-debug, [enable debugging code. [[default=no]]]))
 AC_MSG_CHECKING([if debugging code is to be enabled])
 if test "$enable_debug" = "yes"; then
   AC_DEFINE([QD_DEBUG], [1], [Define to 1 to enable debugging code.])
@@ -73,7 +73,7 @@
 AC_MSG_RESULT($enable_debug)
 
 # --enable-warnings
-AC_ARG_ENABLE(enable_warnings, AC_HELP_STRING(--enable-warnings, [enable compiler warnings. [[default=no]]]))
+AC_ARG_ENABLE([warnings], AS_HELP_STRING(--enable-warnings, [enable compiler warnings. [[default=no]]]))
 AC_MSG_CHECKING([if compiler warnings is to be enabled])
 if test "$enable_warnings" != "yes"; then
   enable_warnings="no"
@@ -83,13 +83,6 @@
 
 # Checks for programs.
 AC_LANG(C++)
-if test "$CXXFLAGS" = ""; then
-  if test "$enable_debug" = "yes"; then
-    CXXFLAGS="-O"
-  else
-    CXXFLAGS="-O2"
-  fi
-fi
 
 # Set up compiler search list.  DUe to possible case insensitive filesystems, 
 # Cygwin and Apple systems sometimes gets confused between cc and CC.
@@ -106,50 +99,10 @@
 fi
 AC_PROG_CC
 
-
-CXX_PROG_NAME=`basename $CXX`
-case $host in
-  powerpc*-*-*)
-    case "$CXX_PROG_NAME" in
-      xlC*) 
-        REQ_CXXFLAGS="$REQ_CXXFLAGS -qstrict"
-      ;;
-    esac
-  ;;
-  i?86-*-* | k?*-*-* | athlon-*-* | ia64-*-* | x86_64-*-*)
-    case "$CXX_PROG_NAME" in
-      icc|icpc|ecc)
-        REQ_CXXFLAGS="$REQ_CXXFLAGS -mp"
-        if test "$enable_warnings" = "yes"; then
-          CXXFLAGS="$CXXFLAGS -wd1572 -wd981 -wd1418 -wd1419"
-        fi
-      ;;
-    esac
-  ;;
-  alpha*-*-*)
-    case "$CXX_PROG_NAME" in
-      cxx) 
-        CXXFLAGS="$CXXFLAGS -std strict_ansi -tweak"
-      ;;
-    esac
-  ;;
-esac
-
-AC_SUBST(REQ_CXXFLAGS)
-CXXFLAGS="$CXXFLAGS $REQ_CXXFLAGS"
-
-if test "$enable_warnings" = "yes"; then
-  if test "$GCC" = "yes"; then
-    CXXFLAGS="$CXXFLAGS -Wall"
-  fi
-fi
-
-if test "$enable_debug" = "yes"; then
-  CXXFLAGS="$CXXFLAGS -g"
-fi
+CXXFLAGS="${CXXFLAGS} -Wall"
 
 # --enable-fma
-AC_ARG_ENABLE(enable_fma, AC_HELP_STRING(--enable-fma, [use fused multiply-add/subtract (auto,gnu,ia64,c99,ibm,compiler).  Use this option with care.  [[default=auto]]]))
+AC_ARG_ENABLE([fma], AS_HELP_STRING(--enable-fma, [use fused multiply-add/subtract (auto,gnu,ia64,c99,ibm,compiler).  Use this option with care.  [[default=auto]]]))
 if test "x$enable_fma" = "x"; then
   enable_fma="auto"
 fi
@@ -248,7 +201,7 @@
     FCFLAGS="-O2"
   fi
 fi
-AC_ARG_ENABLE(enable_fortran, AC_HELP_STRING(--enable-fortran, [build Fortran 77/90 interfaces [[default=auto]]]))
+AC_ARG_ENABLE([fortran], AS_HELP_STRING(--enable-fortran, [build Fortran 77/90 interfaces [[default=auto]]]))
 if test "$enable_fortran" != "no"; then
   AC_LANG_PUSH(Fortran)
   AC_PROG_FC([xlf95 ifort pathf95 f95 gfortran g95 pgf95 lf95 fort ifc efc pathf90 xlf90 pgf90 epcf90 xlf f90])
@@ -312,8 +265,7 @@
 AC_CHECK_LIB(m,sqrt)
 
 # libtool stuff
-AC_DISABLE_SHARED
-AC_PROG_LIBTOOL
+LT_INIT
 
 # Output
 AC_CONFIG_FILES([Makefile config/Makefile src/Makefile include/Makefile 
diff -U3 -r qd-2.3.22.orig/fortran/Makefile.am qd-2.3.22/fortran/Makefile.am
--- qd-2.3.22.orig/fortran/Makefile.am	2018-10-30 23:05:01.000000000 +0700
+++ qd-2.3.22/fortran/Makefile.am	2018-11-09 21:47:44.530083871 +0700
@@ -16,7 +16,9 @@
 
 lib_LTLIBRARIES = libqdmod.la libqd_f_main.la
 libqdmod_la_SOURCES = ddext.f ddmod.f qdext.f qdmod.f f_dd.cpp f_qd.cpp
+libqdmod_la_LIBADD = $(top_builddir)/src/libqd.la $(FCLIBS)
 libqd_f_main_la_SOURCES = main.cpp
+libqd_f_main_la_LIBADD = $(top_builddir)/src/libqd.la libqdmod.la $(FCLIBS)
 ddmod.lo: $(DDEXT) ddext.lo
 qdmod.lo: ddmod.lo $(DDMOD) qdext.lo
 $(QDMOD): qdmod.lo $(DDMOD)
diff -U3 -r qd-2.3.22.orig/qd-config.in qd-2.3.22/qd-config.in
--- qd-2.3.22.orig/qd-config.in	2018-10-30 23:04:56.000000000 +0700
+++ qd-2.3.22/qd-config.in	2018-11-09 21:49:18.140077553 +0700
@@ -14,7 +14,7 @@
 build_CXXFLAGS="@CXXFLAGS@"
 build_LDFLAGS="@LDFLAGS@"
 CXX="@CXX@"
-CXXFLAGS="-I$includedir @REQ_CXXFLAGS@"
+CXXFLAGS="-I$includedir"
 FC="@FC@"
 
 LDFLAGS="-L$libdir -lqd @LIBS@"