RPKI: add -ldl for bird compile for dlopen()

configure.in

@@ -262,6 +262,10 @@ if test "$enable_debug" = yes ; then
 	fi
 fi
 
+BIRD_LIBS=
+AC_CHECK_LIB(dl, dlopen, BIRD_LIBS="-ldl")
+AC_SUBST(BIRD_LIBS)
+
 CLIENT=
 CLIENT_LIBS=
 if test "$enable_client" = yes ; then

tools/Makefile.in

@@ -37,8 +37,8 @@ subdir: sysdep/paths.h .dir-stamp .dep-stamp
 	set -e ; for a in $(static-dirs) $(client-dirs) ; do $(MAKE) -C $$a -f $(srcdir_abs)/$$a/Makefile $@ ; done
 
 $(exedir)/bird: $(bird-dep)
-	@echo LD $(LDFLAGS) -o $@ $^ $(LIBS)
-	@$(CC) $(LDFLAGS) -o $@ $^ $(LIBS)
+	@echo LD $(LDFLAGS) -o $@ $^ $(LIBS) $(BIRD_LIBS)
+	@$(CC) $(LDFLAGS) -o $@ $^ $(LIBS) $(BIRD_LIBS)
 
 $(exedir)/birdc: $(birdc-dep)
 	@echo LD $(LDFLAGS) -o $@ $^ $(LIBS) $(CLIENT_LIBS)

tools/Rules.in

@@ -23,6 +23,7 @@ CPPFLAGS=-I$(root-rel) -I$(srcdir) @CPPFLAGS@
 CFLAGS=$(CPPFLAGS) @CFLAGS@
 LDFLAGS=@LDFLAGS@
 LIBS=@LIBS@
+BIRD_LIBS=@BIRD_LIBS@
 CLIENT_LIBS=@CLIENT_LIBS@
 CC=@CC@
 M4=@M4@