Readme.gcc-2.7.2.3

This is the ``READ ME'' for the GNU C/C++ v2.7.2.3 targetted towards the
SimpleScalar architecture.  The latest GNU does a better job at implementing
something approximating C++ than the stock 2.6.3 included in the toolkit.

The modifications to v2.7.2.3 were largely derived from the 2.6.3
modifications.  Minor tweaks were done as needed.  Be forwarned, I am
no expert on the insides of gcc!  If you find a bug, fix it, and let me
know.

This port has only been built on Solaris/Sparc.  Your milage may vary
on different platforms!

Here is what I do to compile the port

untar it
cd gcc-2.7.2.3
configure --target=ssbig-na-sstrix --with-gnu-as --with-gnu-ld
	--prefix=/usr/local/ss
make LANGUAGES="c c++" CFLAGS="-O3" CC="gcc"
make install LANGUAGES="c c++" CFLAGS="-O3" CC="gcc"

You may ofcourse have to change the install directory (--prefix) to be your
SimpleScalar install.

Additionally, I put under a directory gcc-2.7.2.3/patched/sys some fixed
up includes.  You may want to put these in your SimpleScalar include files.
I found that the latest gcc doesn't like some of the older gcc's non-ANSI
modifiers.  Since they didn't seem to matter except for the odd optimization
here and there (like knowing exit() doesn't come back so you don't have to
worry about the register allocator..), it shouldn't matter.  Place these
fixed up includes (actually, it's just one file) in
/ssbig-na-sstrix/include/sys.

Here is a list of the changes I remember from the stock gcc-2.7.2.3:

config/ss - moved this over from 2.6.3.  Made some minor fix to it to get
	gcc to compile.  RETURN_POPS_ARGS now takes 3 arguments

configure - fixed it so it understands SS.

longlong.h - moved this from 2.6.3.  Stock one was terminal.

Various other minor tweaks which just let gcc know about SS.

Anyway, best of luck,


Mark Oskin
mhoskin@ucdavis.edu