.gitignore: update

.gitignore

@@ -1,34 +1,37 @@
+#
+# common ignore files
+#
+.*
+*.o
+*.o.*
+*.so
+*.d
+
+/tags
+/TAGS
+
+#
+# git files that we don't want to ignore even it they are dot-files
+#
+!.gitignore
+
+#
+# binaries
+#
 draw_svg_tiles
-draw_svg_tiles.o
-helper.o
-model_main.o
-model_tiles.o
-model_devices.o
-model_ports.o
-model_conns.o
-model_switches.o
-model_helper.o
 new_fp
-new_fp.o
 hstrrep
-hstrrep.o
 sort_seq
-sort_seq.o
 merge_seq
-merge_seq.o
 pair2net
-pair2net.o
-floorplan.o
-control.o
 autotest
-autotest.o
-bit_regs.o
-bit_frames.o
 fp2bit
-fp2bit.o
 bit2fp
-bit2fp.o
-parts.o
+
+#
+# folders
+#
 autotest.tmp/
 autotest.out/
+build-libs/
 compare.gold/