On Monday, 12 October 2020 at 18:03:39 UTC, Ola Fosheim Grøstad
wrote:
On Monday, 12 October 2020 at 17:26:22 UTC, Iain Buclaw wrote:
I'm tracking the "master" branch of DMD, as the "merge master
into stable" commits are huge and tend to come with many
implementation regressions.
Maybe it is better to wait for an official gdc/gcc release then.
I won't be pushing anything unless everything passes, so no need
to worry about that.
git init
git remote add users/ibuclaw git://gcc.gnu.org/git/gcc.git
git config --replace-all remote.users/ibuclaw.fetch
"+refs/users/ibuclaw/heads/*:refs/remotes/users/ibuclaw/*"
git fetch users/ibuclaw
git checkout -b gdc-mainline users/ibuclaw/gdc
The assumption is you already know how to build gcc from here.
Ok, thanks. I will give it a spin in a few days and see what
happens. What I'd like to try out is AVR/Arduino as a target,
but I see that avr-gcc is a separate project. Maybe not
compatible with gdc.
Expressions should default to 16 bit integers for performance,
but that only affects the standard library I think. So it could
work with the better-C subset… Although for a start one could
use 32 bit (with slow performance). Actually, I would be
excited just to see a LED blinking... :P
I've just given it a whirl using avr-gcc and simulavr (from
ubuntu focal), and a simplified example program from here
http://www.nongnu.org/simulavr/simple_ex.html.
# Also set AS_FOR_TARGET and others just to be sure...
$ ../configure --prefix=/usr/lib --bindir=/usr/bin
--libexecdir=/usr/lib --libdir=/usr/lib --enable-language=d
--target=avr --with-as=/usr/lib/avr/bin/as
--with-ld=/usr/lib/avr/bin/ld
$ make -j$(nproc)
$ DESTDIR=$PWD/avr-gdc make install -j$(nproc)
$ echo 'module object;' > object.d
$ echo 'module core.volatile;
nothrow: @safe: @nogc:
void volatileStore(ubyte * ptr, ubyte value);
ubyte volatileLoad(ubyte * ptr);
' > volatile.d
$ echo 'module main;
import core.volatile;
// This port corresponds to the "-W 0x20,-" command line option.
enum stdout = cast(ubyte *)0x20;
// This port corresponds to the "-R 0x22,-" command line option.
enum stdin = cast(ubyte *)0x22;
// Poll the specified string out the debug port.
void debug_puts(const(char)[] str) {
foreach (c; str)
volatileStore(stdout, c);
}
extern (C) int main() {
debug_puts("\nHello " ~ __VENDOR__ ~ " " ~
__VERSION__.stringof ~ " on AVR\n\n");
return 0;
}
' > main.d
# Extra -L and -B wouldn't be necessary if I installed it in
the system, or
# avr-libc was installed in same directory.
$ ./avr-gdc/usr/bin/avr-gdc -fno-druntime main.d volatile.d
-O2 -mmcu=attiny2313 -L/usr/lib/avr/lib
-L/usr/lib/avr/lib/avr25/tiny-stack
-B/usr/lib/avr/lib/avr25/tiny-stack
$ simulavr -d attiny2313 -f a.out -W 0x20,- -R 0x22,- -T exit
Hello GNU D 2094L on AVR
SystemClock::Endless stopped
number of cpu cycles simulated: 442
