[FFmpeg-devel] [RFC] AES init

[Rich Felker]

On Sun, May 13, 2007 at 05:49:09PM -0700, Trent Piepho wrote:
> > I like it! As usual, Michael has a great solution! Now write the
> > script to compile and run the program to generate the static table and
> > update the C source file. :)
> 
> If you stick each table in its own header file, it's easy to write a C
> program that generates the header, and have make automatically run the
> program to create the table.
> 
> Simplified makefile:
> 
> aes.h: table-foo.h
> 
> table-foo.h: make-foo
> 	make-foo > table-foo.h
> 
> make-foo: make-foo.c
> 	$(HOSTCC) make-foo.c -o make-foo   # HOSTCC, for cross compiling
> 
> It's especially useful if the contents of the table itself are being
> developed.

One issue: the table should be kept in the repo/tarball even if it's
generated because this won't work when cross-compiling. Or at least
you need a more elaborate build process with both CC and HOSTCC if you
want to support cross-compiling.

Rich