Using flag diacritics for faster compilation

`lexd` is a bit slow to compile dictionaries that make heavy use of filters.

To speed this up, you can enable compiling to flag diacritics.

Implementing the change

First thing you want to do is edit your `Makefile.am`:

• remove `autogen.bin` and `automorf.bin` lines from the TARGETS_COMMON list at the top
• add `-f` as a switch to the `lexd` commmands
• add `-F` as a switch to the `hfst-compose` command in the the `automorf.hfst` line

This will all look something like this:

 TARGETS_COMMON =                       \
        $(LANG1).automorf.hfst          \
-       $(LANG1).automorf.bin           \
        $(LANG1).automorf.att.gz        \
        $(LANG1).autogen.hfst           \
-       $(LANG1).autogen.bin            \
        $(LANG1).autogen.att.gz         \
        $(LANG1).autopgen.bin           \
        $(LANG1).rlx.bin            \
        $(LANG1).zhfst

 .deps/$(LANG1).RL.lexd.hfst: .deps/$(LANG1).RL.lexd
-       lexd $< .deps/$(LANG1).RL.lexd.att
+       lexd -f $< .deps/$(LANG1).RL.lexd.att
        hfst-txt2fst .deps/$(LANG1).RL.lexd.att -o $@
 
 .deps/$(LANG1).LR.lexd.hfst: .deps/$(LANG1).LR.lexd
-       lexd $< .deps/$(LANG1).LR.lexd.att
+       lexd -f $< .deps/$(LANG1).LR.lexd.att
        hfst-txt2fst .deps/$(LANG1).LR.lexd.att -o $@

 $(LANG1).automorf.hfst: .deps/$(LANG1).LR.hfst .deps/$(LANG1).spellrelax.hfst
-       hfst-compose -1 $< -2 .deps/$(LANG1).spellrelax.hfst | hfst-invert | hfst-fst2fst -O -o $@
+       hfst-compose -F -1 $< -2 .deps/$(LANG1).spellrelax.hfst | hfst-invert | hfst-fst2fst -O -o $@

Additional steps

Updating modes.xml

You'll want to change all the instances of lt-proc and auto*.bin in your modes.xml file to hfst-proc and auto*.hfst, respectively.

Running hfst-expand and hfst-lookup

You'll also need to add -X obey-flags to hfst-expand or hfst-lookup.

Running tests

In theory you shouldn't have to do anything extra?