[BRLTTY] BRLTTY in GRUB2

[Dave Mielke]

I believe there are no more exit()s left now.

serial.c has now been split up. I'll work on a serial_grub.c as soon as I can 
get a simulated grub build environment working.

Regarding a simulated grub build environment: To understand the following 
errors, it may be helpful for you to know that /home/dave/brltty/projects/grub 
is my brltty build root for this work, and, in there, grub is a symbolic link 
to where I have a copy of the grub-brltty tree. At this point, configure is 
reporting this:

configure:5940: /lib/cpp  -DGRUB_RUNTIME -I/home/dave/brltty/projects/grub/grub/grub-core/lib/posix_wrap/include -I/home/dave/brltty/projects/grub/grub/include conftest.c
In file included from /home/dave/brltty/projects/grub/grub/grub-core/lib/posix_wrap/include/limits.h:22,
                 from conftest.c:18:
/home/dave/brltty/projects/grub/grub/include/grub/types.h:22:20: error: config.h: No such file or directory
/home/dave/brltty/projects/grub/grub/include/grub/types.h:24:28: error: grub/cpu/types.h: No such file or directory
/home/dave/brltty/projects/grub/grub/include/grub/types.h:50:3: error: #error "This architecture is not supported because sizeof(void *) != 4 and sizeof(void *) != 8"

This seems to be saying that <grub/types.h> is trying to include the two files 
<grub/cpu/types.h> and <config.h>, both of which can't be found. Am I, perhaps, 
missing a -I option? So far, within the grub tree, I'm pointing to 
grub-core/lib/posix_wrap/include and include.

-- 
Dave Mielke           | 2213 Fox Crescent | The Bible is the very Word of God.
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