Back when GPF released a somewhat working build of GCC 4.0.1 for the DC, any bin that I compiled was at least 10% smaller. GCC 4 introduced a brand new, and much better optimization system.

The problems were that: 1) KOS needs to be modified to compile with GCC 4 (mostly depreciated lval usage) 2) C++ support was broken.

It would be great to see another try at a working gcc 4 for DC compilation.

-fno-function-cse and -fno-gcse make strange errors when running a game.

Is there any differences between gcc 3.x and 4.x in performance???

EDIT: i've found the kpit gnu sh toolchain. Did anyone knows if it works with dreamcast??

-O3 -fno-function-cse -funit-at-a-time -funroll-loops -fno-gcse

yet a better one:
-O3 -fno-function-cse -funit-at-a-time -funroll-loops -fno-gcse -fsort-data -fno-delete-null-pointer-checks -relax -ffast-math -Wall -g -fomit-frame-pointer

In between my work of chosing the best GCC version for DC coding I fond those to be the best way to get speed for our work. ;):)

I have always used the 3.4.6 and worked great for me...
Anyway the dc dev compiler and tools need and update and some fixes...

yeeeeeeaaaaahhhhhhhh i wan't the flag tweaks!!!

I didn't know that 4.2.2 worked well in dc.

Hi.

Some days ago I started to setup my DC env. But I ended up with the question: What GCC version does a better job? So I started to do some testing and 3.4.6 version has some bugs.
So I jumped to see the 4.x gcc branch and fond the answer to my question.

Q: So you ask me what version I chose?
A: Either one, 4.2.2 needs some Flag tweaking will compiling stuff thou

NOTE:
I can post the Flag tweaks later on if requested.

Mekanaizer going to bed now. :D;)