Hi,

On Tue, 17 Jul 2018, Martin Liška wrote:

> 1) gcc/optc-save-gen.awk is full of copy&pasted code, due to lack of flags type classes multiple
> global variables are created (var_opt_char, var_opt_string, ...)
> 
> 2) similar happens in gcc/opth-gen.awk
> 
> 3) we do very many regex matches (mainly in gcc/opt-functions.awk), I believe
>    we should come up with a structured option format that will make parsing and
>    processing much simpler.
> 
> 4) we can come up with new sanity checks of options:
> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81397
> 
> 5) there are various targets that generate *.opt files, one example is ARM:
> gcc/config/arm/parsecpu.awk
> 
> where transforms:
> ./gcc/config/arm/arm-cpus.in
> 
> I guess having a well-defined structured format for *.opt files will make
> it easier to write generated opt files?
> 
> I'm attaching a prototype that can transform optionlist into options-save.c
> that can be compiled and works.
> 
> I'm looking forward to a feedback.

Using any python scripts as part of generally building GCC (i.e. where the 
generated files aren't prepackaged) will introduce a python dependency for 
distro packages.  And for those distros that bootstrap a core cycle of 
packages (e.g. *SUSE) this will include python (and all its dependencies) 
into that bootstrap cycle.

That will be terrible.


Ciao,
Michael.