support dynamic loading

fix save to leave module user in boot.


git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@468 b08c6af1-5177-4d33-ba66-4b1c6b8b522a

Makefile.in

@@ -456,7 +456,7 @@ mycb: $(srcdir)/mycb.c
 
 startup: yap $(PL_SOURCES)
 	-rm -f startup
-	echo "['$(srcdir)/pl/init.yap']. save_program(startup)." |  @CROSS_SIMULATOR@ ./yap -b $(srcdir)/pl/boot.yap
+	echo "['$(srcdir)/pl/init.yap']. module(user). save_program(startup)." |  @CROSS_SIMULATOR@ ./yap -b $(srcdir)/pl/boot.yap
 
 yap: $(HEADERS) yap.o @YAPLIB@
 	$(MPI_CC) $(STANDARD_CFLAGS) $(LDFLAGS) -o yap yap.o @YAPLIB@ $(LIBS) @MPI_LIBS@
@@ -466,6 +466,9 @@ libYap.a: $(LIB_OBJECTS)
 	$(AR) rc libYap.a $(LIB_OBJECTS)
 	$(RANLIB) libYap.a
 
+@DO_SECOND_LD@libYap@SHLIB_SUFFIX@: $(LIB_OBJECTS)
+@DO_SECOND_LD@	@SHLIB_LD@ -o libYap@SHLIB_SUFFIX@ $(LIB_OBJECTS) $(LIBS)
+
 install: install_bin install_data
 
 install_bin: @INSTALL_COMMAND@
@@ -497,7 +500,7 @@ install_win32: startup
 	(cd library/system; make install_win32)
 	(cd library/random; make install_win32)
 
-install_library: libYap.a
+install_library: @YAPLIB@
 	$(INSTALL_DATA) libYap.a  $(DESTDIR)$(LIBDIR)/libYap.a
 	mkdir -p $(DESTDIR)$(INCLUDEDIR)
 	for h in $(HEADERS); do $(INSTALL) $$h $(DESTDIR)$(INCLUDEDIR); done

configure.in

@@ -45,6 +45,9 @@ AC_ARG_ENABLE(debug-yap,
 AC_ARG_ENABLE(cygwin,
 	[ --enable-cygwin            use cygwin library in WIN32 ],
 	cygwin="$enableval", cygwin=no)
+AC_ARG_ENABLE(dynamic_loading,
+	[ --enable-dynamic-loading    compile Yap as a DLL ],
+	dynamic_loading="$enableval", dynamic_loading=no)
 	
 AC_ARG_WITH(gmp,
 	[ --with-gmp[=DIR]           use GNU Multiple Precision in DIR],
@@ -371,7 +374,6 @@ INSTALL_DLLS="#"
 SHLIB_LD="@#"
 DO_SECOND_LD="#"
 NEWSHOBJ="sobjs"
-YAPLIB="libYap.a"
 M4="m4"
 
 case $target_os in
@@ -501,6 +503,14 @@ case $target_os in
 	;;
 esac
 
+if test "$dynamic_loading" = "yes"
+then 
+  YAP_EXTRAS="$SHLIB_CFLAGS $YAP_EXTRAS"
+  YAPLIB=libYap"$SHLIB_SUFFIX"
+else
+ YAPLIB="libYap.a"
+fi
+
 if test "$coroutining" = "yes"
   then
   YAP_EXTRAS="$YAP_EXTRAS -DCOROUTINING=1"