Support for --header-file

[firasuke]

Hey there Mr. Thomas,

Thank you for your time and effort on all your amazing projects!

I recently switched to reflex as the main lex implementation on my system, and things have been smooth until I stumbled upon this missing flag --header-file when attempting to build kbd.

Attempting to ./configure then make on kbd throws the following error:

...
  LEX      analyze.c                                                                                                                                                          
invalid option: --header-file=/tmp/kbd-2.6.4/src/libkeymap/analyze.hflex [options] [file ...]                                                                   
                                                                                                                                                                              
Options:                                                                                                                                                                      
 ...

It appears to be complaining about a missing flag --header-file that flex supports.

Is this intended behavior?

Thanks again for your time!

[ThomasDickey]

I never thought about that. It wouldn't help with the main use I make for lexers (in vile). Some thoughts:

• it would have been nice to use the same option letters that yacc uses, but flex's -d and yacc's -d are already assigned
• on the other hand, I'd prefer to not lock into long options for various reasons
• aside from dithering over option assignments, there's the question of how it might be used. I see you're using some bison-specific %option lines. Perhaps (with the header option) reflex might not work in that application. (If it does, generating the header is not a big effort).

[firasuke]

Thank you for youe time Mr. Thomas.

I have opened an issue in the kbd repository to track this.

I was wondering if it could be solved without having to drop the header-file option.

I am willing to test any changes you see fit.