Dan Olson <zans.is.for.c...@yahoo.com> writes:
> Dan Olson <zans.is.for.c...@yahoo.com> writes:
>
>> Johannes Pfau <nos...@example.com> writes:
>>>
>>> _Dmodule_ref?
>>> You can just declare it as extern(C) __gshared void* _Dmodule_ref; (But
>>> IIRC you have to compile with -nophoboslib to make it work)
>>> It's used by the runtime/compiler to setup the ModuleInfos but you
>>> don't have to initialize it, it just needs to be declared.
>>
>> I might try that. It will give me a warm+fuzy before I get all of
>> libgdruntime built. It would just be a simple "Hello D" to the console
>> using puts().
>
> Ok, that gave me an arm object file with simple D code. I linked in to
> an iphone app. When I run, module init code get called (yeah) but soon
> tries a move from an bad address. Probably my own doing with my port of
> arm-darwin. I'll look through Timo post, see if it is related. Later
> this week I will compare my toolchain's D assembler output with a D
> arm-eabi chain, see what's up.
Well, I got some time to work on this again. More progress, although a
baby step. D compiled code running in an iphone.
Looks like my modified gcc-4.8 -fPIC assembler output is not correct,
but it (and PIE) is the default for an iphone toolchain. So for now I
turn off PIC and then can compile and execute a simple D module that
needs no druntime support or emutls.
That's it for now. I include some of the details below if anyone is
interested in following this.
ncc is an alias to a freshly built xgcc as I work on the gcc build:
# My latest gcc-4.8 for arm-darwin
alias ncc='/Users/dan/projects/gdc/ios-arm-obj/./gcc/xgcc
-B/Users/dan/projects/gdc/ios-arm-obj/./gcc/
-B/usr/local/gdc-iosim/arm-apple-darwin/bin/
-B/usr/local/gdc-iosim/arm-apple-darwin/lib/ -isystem
/usr/local/gdc-iosim/arm-apple-darwin/include -isystem
/usr/local/gdc-iosim/arm-apple-darwin/sys-include
--sysroot=/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.0.sdk'
Build a .o (I have some warnings to look at):
$ ncc -O2 -fno-pic -I ~/projects/gdc/devnew/libphobos/libdruntime -c dhello.d
cc1d: warning: command line option '-fno-builtin-strcat' is valid for
C/C++/ObjC/ObjC++ but not for D
cc1d: warning: command line option '-fno-builtin-strcpy' is valid for
C/C++/ObjC/ObjC++ but not for D
cc1d: warning: this target does not support '-fsection-anchors'
The linker complains about not being able to use PIE (because I am
cheating with -fno-pic). Also, link complains about CPU_SUBTYPE_ARM_ALL
subtype is deprecated, so I need to look into that.
---- dhello.d ----
extern (C)
{
__gshared void* _Dmodule_ref;
int puts(const(char) *str);
int write(int fd, const(void*) buf, int len);
}
extern(C) int dhello()
{
puts("dhello is puts()ing this message");
realDfunc();
return 2012;
}
// shared, otherwise need emutls
shared string s = "A message from a D string\n";
void realDfunc()
{
// need druntime support
//auto m = s ~ "\n";
foreach (c; s)
{
write(1, &c, 1);
}
}
--- D output from my iphone (on xcode gdb console) ----
dhello is puts()ing this message
A message from a D string
dhello() returned 2012
