--- rpl/configure.ac	2016/12/04 23:09:34	1.180
+++ rpl/configure.ac	2017/06/20 15:39:11	1.188
@@ -11,14 +11,14 @@ dnl Libraries
 NCURSES=ncurses-6.0
 READLINE=readline-7.0
 UNITS=units-2.13
-GSL=gsl-2.2.1
+GSL=gsl-2.4
 GPP=gpp-3.0
-GNUPLOT=gnuplot-5.0.4
+GNUPLOT=gnuplot-5.0.5
 FILE=file-5.29
 ICONV=libiconv-1.14
-SQLITE=sqlite-3.15.2
-OPENSSL=openssl-1.1.0b
-OPENMOTIF=openmotif-2.3.4
+SQLITE=sqlite-3.16.2
+OPENSSL=openssl-1.1.0f
+OPENMOTIF=openmotif-2.3.7
 LIBXPM=libXpm-3.5.11
 SIGSEGV=libsigsegv-2.11
 ZLIB=zlib-1.2.8
@@ -211,7 +211,7 @@ AC_SUBST(INCRPLCAS)
 
 dnl Options
 AC_ARG_ENABLE(optimization,
-[  --enable-optimization   set compiler flags [[default=environment variables -O3]]], [
+[  --enable-optimization   set compiler flags [[default=environment variables -O2, enable=environment variables -O3]]], [
 if test "$enableval" = "no"; then
 	CFLAGS=$ABI
 	FFLAGS=$ABI
@@ -223,10 +223,10 @@ else
 	CXXFLAGS="$CXXFLAGS $ABI $OPTIMISATION_CXX"
 	FCFLAGS="$FCFLAGS $ABI $OPTIMISATION_F"
 fi],[
-	CFLAGS="$CFLAGS $ABI $OPTIMISATION_C" 
-	FFLAGS="$FFLAGS $ABI $OPTIMISATION_F"
-	CXXFLAGS="$CXXFLAGS $ABI $OPTIMISATION_CXX"
-	FCFLAGS="$FCFLAGS $ABI $OPTIMISATION_F"
+	CFLAGS="$CFLAGS $ABI -O2" 
+	FFLAGS="$FFLAGS $ABI -O2"
+	CXXFLAGS="$CXXFLAGS $ABI -O2"
+	FCFLAGS="$FCFLAGS $ABI -O2"
 	]
 )