diff --git a/LGPL/chr/Makefile.in b/LGPL/chr/Makefile.in
index d8a630703..806d9a504 100644
--- a/LGPL/chr/Makefile.in
+++ b/LGPL/chr/Makefile.in
@@ -8,18 +8,15 @@ EROOTDIR = @exec_prefix@
 
 srcdir=@srcdir@
 
+BINDIR = $(EROOTDIR)/bin
+LIBDIR=$(EROOTDIR)/lib
+YAPLIBDIR=$(EROOTDIR)/lib/Yap
+SHAREDIR=$(ROOTDIR)/share
+
 SHELL=@SHELL@
-PLBASE=@PLBASE@
-PLARCH=@PLARCH@
-PL=LD_LIBRARY_PATH=system YAPSHAREDIR=`pwd`/../../library ../../yap ../../startup
-XPCEBASE=$(PLBASE)/xpce
-PKGDOC=$(PLBASE)/doc/packages
-PCEHOME=../../xpce
-LIBDIR=$(PLBASE)/library
-SHAREDIR=$(ROOTDIR)/share/Yap
+PL=@EXTEND_DYNLOADER_PATH@ $(DESTDIR)$(BINDIR)/yap $(DESTDIR)$(YAPLIBDIR)/startup 
 CHRDIR=$(SHAREDIR)/chr
 EXDIR=$(CHRDIR)/examples/chr
-DESTDIR=
 LN_S=@LN_S@
 
 DOCTOTEX=$(PCEHOME)/bin/doc2tex
diff --git a/changes-5.1.html b/changes-5.1.html
index a5e8330c5..1501d2cc9 100644
--- a/changes-5.1.html
+++ b/changes-5.1.html
@@ -18,6 +18,8 @@
 <h2>Yap-5.1.4:</h2>
 <ul>
 <li> .</li>
+<li> FIXED: DESTIR and chr.</li>
+<li> FIXED: make term_variables a builtin. (SWI compatibility).</li>
 <li> NEW: X is random(Int) (SWI compatibility).</li>
 <li> NEW: seletchk/3.</li>
 <li> FIXED: do meta-expansion from undefp.</li>
diff --git a/configure b/configure
index 25f0bc8c4..c2a5afe66 100755
--- a/configure
+++ b/configure
@@ -689,6 +689,7 @@ CPLINT_CFLAGS
 CPLINT_LDFLAGS
 CPLINT_SHLIB_LD
 ENABLE_CPLINT
+EXTEND_DYNLOADER_PATH
 M4
 M4GENHDRS
 INSTALL_DLLS
@@ -3097,7 +3098,6 @@ else
 fi
 
 
-
 if test "$tabling" = yes -o "$orparallelism" = yes -o "$threads" = yes
 then
   cat >>confdefs.h <<\_ACEOF
@@ -7124,10 +7124,14 @@ then
   YAP_EXTRAS="$SHLIB_CFLAGS $YAP_EXTRAS"
   CROSS_SIMULATOR="LD_LIBRARY_PATH=."
   case "$target_os" in
+  *cygwin*!*mingw32*)
+    EXTEND_DYNLOADER_PATH=""
+    ;;
   *darwin*)
     DYNYAPLIB=libYap"$SHLIB_SUFFIX"
     YAPLIB="$DYNYAPLIB"
     DYNLIB_LD="gcc -dynamiclib"
+    EXTEND_DYNLOADER_PATH="DYLD_LIBRARY_PATH=\$DYLD_LIBRARY_PATH:\$(DESTDIR)\$(LIBDIR): YAPSHAREDIR=\$(DESTDIR)\$(SHAREDIR)/Yap YAPLIBDIR=\$(DESTDIR)\$(YAPLIBDIR)"
     ;;
   *)
        case "$target_cpu" in
@@ -7141,6 +7145,7 @@ then
         JAVA_TARGET=sparc
         ;;
        esac
+    EXTEND_DYNLOADER_PATH="LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$(DESTDIR)$(LIBDIR): YAPSHAREDIR=$(DESTDIR)$(SHAREDIR)"
     LDFLAGS="$LDFLAGS -Wl,-R,$prefix/lib  -Wl,-R,$JAVA_HOME/jre/lib/$JAVA_TARGET"
     DYNYAPLIB=libYap"$SHLIB_SUFFIX"
     YAPLIB="$DYNYAPLIB"
@@ -7148,6 +7153,7 @@ then
     ;;
   esac
 else
+  EXTEND_DYNLOADER_PATH="YAPSHAREDIR=$(DESTDIR)$(SHAREDIR)"
   DYNYAPLIB=libYap.notused
 fi
 
@@ -7521,6 +7527,7 @@ else
 fi
 
 
+
 # LAM
 OLD_CC=${CC}
 CC=${LAM_MPI_CC}
@@ -16902,6 +16909,7 @@ CPLINT_CFLAGS!$CPLINT_CFLAGS$ac_delim
 CPLINT_LDFLAGS!$CPLINT_LDFLAGS$ac_delim
 CPLINT_SHLIB_LD!$CPLINT_SHLIB_LD$ac_delim
 ENABLE_CPLINT!$ENABLE_CPLINT$ac_delim
+EXTEND_DYNLOADER_PATH!$EXTEND_DYNLOADER_PATH$ac_delim
 M4!$M4$ac_delim
 M4GENHDRS!$M4GENHDRS$ac_delim
 INSTALL_DLLS!$INSTALL_DLLS$ac_delim
@@ -16922,7 +16930,6 @@ JAVAC!$JAVAC$ac_delim
 JAR!$JAR$ac_delim
 IN_UNIX!$IN_UNIX$ac_delim
 YAPMPILIB!$YAPMPILIB$ac_delim
-LAM_MPI_CC!$LAM_MPI_CC$ac_delim
 _ACEOF
 
   if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 97; then
@@ -16964,6 +16971,7 @@ _ACEOF
 ac_delim='%!_!# '
 for ac_last_try in false false false false false :; do
   cat >conf$$subs.sed <<_ACEOF
+LAM_MPI_CC!$LAM_MPI_CC$ac_delim
 MPI_OBJS!$MPI_OBJS$ac_delim
 MPI_LIBS!$MPI_LIBS$ac_delim
 INSTALL_COMMAND!$INSTALL_COMMAND$ac_delim
@@ -16982,7 +16990,7 @@ LIBOBJS!$LIBOBJS$ac_delim
 LTLIBOBJS!$LTLIBOBJS$ac_delim
 _ACEOF
 
-  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 16; then
+  if test `sed -n "s/.*$ac_delim\$/X/p" conf$$subs.sed | grep -c X` = 17; then
     break
   elif $ac_last_try; then
     { { echo "$as_me:$LINENO: error: could not make $CONFIG_STATUS" >&5
diff --git a/configure.in b/configure.in
index 02b7db75d..679830c7d 100644
--- a/configure.in
+++ b/configure.in
@@ -261,7 +261,6 @@ AC_ARG_WITH(max-threads,
 	fi,
 	[yap_cv_max_threads="1024"])
 
-
 if test "$tabling" = yes -o "$orparallelism" = yes -o "$threads" = yes
 then
   AC_DEFINE(MinHeapSpace, (1000*SIZEOF_INT_P))
@@ -854,10 +853,14 @@ then
   YAP_EXTRAS="$SHLIB_CFLAGS $YAP_EXTRAS"
   CROSS_SIMULATOR="LD_LIBRARY_PATH=."
   case "$target_os" in
+  *cygwin*!*mingw32*)
+    EXTEND_DYNLOADER_PATH=""
+    ;;
   *darwin*)
     DYNYAPLIB=libYap"$SHLIB_SUFFIX"
     YAPLIB="$DYNYAPLIB"
     DYNLIB_LD="gcc -dynamiclib"
+    EXTEND_DYNLOADER_PATH="DYLD_LIBRARY_PATH=\$DYLD_LIBRARY_PATH:\$(DESTDIR)\$(LIBDIR): YAPSHAREDIR=\$(DESTDIR)\$(SHAREDIR)/Yap YAPLIBDIR=\$(DESTDIR)\$(YAPLIBDIR)"
     ;;
   *)
        case "$target_cpu" in
@@ -871,6 +874,7 @@ then
         JAVA_TARGET=sparc
         ;;
        esac
+    EXTEND_DYNLOADER_PATH="LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$(DESTDIR)$(LIBDIR): YAPSHAREDIR=$(DESTDIR)$(SHAREDIR)"
     LDFLAGS="$LDFLAGS -Wl,-R,$prefix/lib  -Wl,-R,$JAVA_HOME/jre/lib/$JAVA_TARGET"
     DYNYAPLIB=libYap"$SHLIB_SUFFIX"
     YAPLIB="$DYNYAPLIB"
@@ -878,6 +882,7 @@ then
     ;;
   esac
 else
+  EXTEND_DYNLOADER_PATH="YAPSHAREDIR=$(DESTDIR)$(SHAREDIR)"
   DYNYAPLIB=libYap.notused
 fi
 
@@ -992,6 +997,7 @@ else
 	ENABLE_CPLINT="#"
 fi
 AC_SUBST(ENABLE_CPLINT)
+AC_SUBST(EXTEND_DYNLOADER_PATH)
 
 # LAM
 OLD_CC=${CC}