[fpc-pascal] How to include Carbon.h?
Hello, Pascal folks, I'm using FPC 2.0.4 on MacOSX 1.4.9 PPC and trying to write a Pascal library that is externally called from REALbasic (Rb). But Rb needs Carbon.h header included in dylibs which are called by Rb programs. In C, it's easy: #include Carbon/Carbon.h Unfortunately, I am not familier to C, so that, I want to write the library in FPC. How it can be achieved in FPC? Could you give me some suggestions? I have used CarbonEventsCore.ppu, but found not sufficient enough. The application still crashes in certain circumstances. -- View this message in context: http://www.nabble.com/How-to-include-Carbon.h--tf3605888.html#a10074354 Sent from the Free Pascal - General mailing list archive at Nabble.com. ___ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
Re: [fpc-pascal] How to include Carbon.h?
On 19 apr 2007, at 11:01, BlueCat wrote:
I'm using FPC 2.0.4 on MacOSX 1.4.9 PPC and trying to write a
Pascal library
that is externally called from REALbasic (Rb). But Rb needs
Carbon.h header
included in dylibs which are called by Rb programs.
In C, it's easy:
#include Carbon/Carbon.h
Including that header that does not add any code to your dynamic
library, so the actual requirement has to be something else. I know
someone who is using an FPC-compiled dynamic library in a (universal)
REALBasic program, so it is definitely possible.
Unfortunately, I am not familier to C, so that, I want to write the
library
in FPC. How it can be achieved in FPC?
The closest equivalent is the FPCMacOSAll unit. But this will not add
any code to your program if you don't call any of its routines,
similarly to including Carbon/Carbon.h
Could you give me some suggestions?
I have used CarbonEventsCore.ppu, but found not sufficient enough.
The
application still crashes in certain circumstances.
The crashes are probably due to a bug in the 2.0.4 compiler, not due
to not including Carbon/Carbon.h or so. Try installing a snapshot:
ftp://ftp.freepascal.org/pub/fpc/snapshot/v21/powerpc-macosx/
fpc-2.1.1.powerpc-macosx.dmg
Further, make sure that all routines which you call from the
REALBasic program have the calling convention mwpascal. You can
switch this calling convention on in all Pascal sources by adding
this at the top:
{$calling mwpascal}
Jonas
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Re: [fpc-pascal] How to include Carbon.h?
Hello, Pascal folks,
I'm using FPC 2.0.4 on MacOSX 1.4.9 PPC and trying to write a Pascal library
that is externally called from REALbasic (Rb). But Rb needs Carbon.h header
included in dylibs which are called by Rb programs.
In C, it's easy:
#include Carbon/Carbon.h
Unfortunately, I am not familier to C, so that, I want to write the library
in FPC. How it can be achieved in FPC?
Could you give me some suggestions?
I have used CarbonEventsCore.ppu, but found not sufficient enough. The
application still crashes in certain circumstances.
So the Pascal code compiles, links with the RB code, but crashes when it
runs? How far does it run?
It can't possibly be a problem with calling conventions? Pascal routines
that you need to call from C need to be declared appropriately, with
cdecl or MWPascal (which are equivalent, I think). Could that be the
problem? Then Jonas' suggestion to use {$calling mwpascal} could be
just what you need. Then your calls will be compiled to use C calling
conventions.
Another problem when mixing languages is the Pascal RTL. You might need
to link with that. (That is not necessarily trivial, I am having trouble
with that myself.) But that doesn't sound like your problem, right?
/Ingemar
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Re: [fpc-pascal] How to include Carbon.h?
Ingemar Ragnemalm wrote:
So the Pascal code compiles, links with the RB code, but crashes when it
runs? How far does it run?
[snip]
Thanks you, Jonas and Ingmal. Here is an example.
Library stub;
{$calling mwpascal}
uses CarbonEventsCore;
function aint(i : smallint) : smallint;
begin
aint := succ(sqr(i))
end;
exports
aint name '_aint',
aint;
end.
I compiled this with FPC 2.1.1 (as suggested by Jonas) and got a .dylib
file. This can be called REALbasic(Rb) through Soft Declare statement. The
Rb application runs for some extents. The function aint is successfuly
called. Rb app displays its result correctly. If you select Quit from
application menu, it quits. But if you open a modal dialog (e.g. that to
get a file for opening) from the application and make scrolls, looking
around directories etc. , the application crashes.
Of course, crash does not occure before calling function aint.
I have tryed cdecl and stdcall calling conventions, but the results are
same.
CarbonEventsCore really does something. Without CarbonEventsCore, the
application won't open a modal dialog but crashes at launching it.
I have considered switching Rb to Lazarus. But Lazarus currently lacks
components to handle MPEG2 or Quicktime movie files. That's the main reason
why I use Rb instead.
--
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