Re: [Tinycc-devel] Some fixes for x86_64 and general code to enable compiling GCC

[grischka]

Michael Matz wrote:
> Hi,
>
> I was bored the last weekend and stumbled over tinycc, tried compiling 
> GCC with it, which breaks in multiple ways, sometimes not parsing stuff, 
> sometimes miscompiling it, and thought about hacking some other compiler 
> than GCC :)  I just pushed nine patches to mob to fix all the problems I 
> encountered (also attached for reference).

Thanks for sharing this moment of productive boredom.

> I've added testcases for all the issues to tcctest.c.
>
> I can now build current GCC (well, r186469 plus a modification, see 
> below) with tinycc on x86_64 (all language frontends written in C, i.e. 
> c, c++, objc, objc++ and fortran), and that so built GCC is able to 
> compile all its own target libraries.

If practicable, could you post the recipe that you used to build
GCC with TCC?  (If it is a script you might just push it into our
'tests' directory.  There is already gcctestsuite.sh)

> The nice thing is that I even found a real bug in GCC (fixing it is 
> required to make it work with tinycc on x86_64), which I'm going to 
> apply upstream later, but for completeness I attach it here too in case 
> anyone wants to play with it right now (fix-diag-vaend.diff) :)
>
>
> Have fun,
> Michael.

It was fun to read, indeed.

--- grischka