In our previous episode, Mattias Gaertner said:
> Why not write &666? Maybe some religious reasons? ;)
No, simply that octal literal support is newer than the *nix rtl.
If you want to work on this, please fix the constants in the FreeBSD console
unit too, there are another couple of hundred such
In our previous episode, Michael Schnell said:
> > (I don't know how Delphi implements Corba interfaces, it had a own
> > broker for some time)
> Sorry, but I feel we are loosing tack of the original focus of this
> thread: "what is a save replacement of multiple inheritance of classes ? "
>
>
In our previous episode, Michael Schnell said:
> In fact I did understand I only am puzzled by the naming "COM" vs
> "CORBA", that in no way suggest the real (language-) functionality "ref
> counting" vs "not ref counting"
IIRC there was discussion back then about having non COM interfaces. Corb
In our previous episode, Xiangrong Fang said:
> BUT, that cannot be used to prioritize a thread. While you block a thread
> using rtlevent, it can only be unblocked from another thread. While you use
> sleep(), it still get time share of the CPU, only that it does nothing
> until sleep finishes, ri
In our previous episode, Michael Schnell said:
> > You may use RTLEvents to pause a thread. =>
> >
> Obviously CPU the overhead is a lot greater than with just calling sleep.
??? Afaik they are the procedural counterpart of TEvents, and I think that
using them is cheaper than sleep, since you only
In our previous episode, Michael Schnell said:
> > Exactly. Interface delegation solves this problem, that is why it was
> > invented.
>
> How does this correspond to the fact that (AFAIK) interfaces are
> auto-creating, reference-counted and auto-destroying, while classes are
> not ?
>
> Ore
In our previous episode, Michael Schnell said:
> >> will make the instance remoce itself.
> > You need a full queue for that, since the mainthread might not run till the
> > thread next queue()'s.
> The fpc RTL does implement a full blown queue for managing TThread.Queue
> and TThread.Synchronize.
In our previous episode, Bee said:
>
> http://blog.cleancoder.com/uncle-bob/2015/01/08/InterfaceConsideredHarmful.html
>
> I wonder, how modern Pascal (FreePascal in particular) answer the
> questions. :)
I don't actually see questions why you shouldn't have interfaces. I only see
reasons in tho
In our previous episode, Michael Schnell said:
> On this behalf, "Application.QueuAsyncCall" is more versatile.
>
> But it's easy with TThread.Queue, as well.
>
> - define a class (not to be derived from TThread) that holds the data
> to be transferred and a procedure without parameters
> -
In our previous episode, Andreas Schneider said:
>
> So in case there is simply no one who tried libxml on OSX, I would be
> willing to do. However, how to correctly build it?
> I modified fpmake.pp to include "darwin" as possible target, but calling
> fpmake fails:
>
> ./fpmake
> The installer
In our previous episode, Jon Foster said:
> Is there documentation for compiling FPC? Am I just missing it
> somewhere? FPC seems incredibly flexible and I'd like to take advantage
> of it on some other platforms but so far it looks like that is reserved
> for a wizard elite somewhere and nobody is
In our previous episode, Lukasz Sokol said:
> > I don't think this needs to be done formally. Any users can package
> > snapshots cq pseudo releases and mark them as test, and release them for
> > feedback. Then process the feedback, triage it, and communicate that back
> > upstream.
>
> Which som
In our previous episode, silvioprog said:
>
> My suggestion is just: to make easier to test, for any programmer. E.g:
>
> - fpc-3.0.0-beta1/beta2 +/-jan/feb
> - fpc-3.0.0-RC1/RC2 +/-may/jun
> - fpc-3.0.0-RC3/fpc-3.0.0-stable +/-dec.
>
> Yes, it is hard to do, but IMHO it is necessary.
I don't t
In our previous episode, Michael Van Canneyt said:
> > Am I wrong thinking, that using "proxy FCGI" projects are a lot easier to
> > manage, anyway, as here you can use normal debugging means (e.g. Lazarus) ?
>
> Not really.
> On windows they must be service programs, which are an
> absolute ho
In our previous episode, Bj?rn Schreiber said:
> Am 26.01.2015 um 21:15 schrieb Mark Morgan Lloyd:
> > Since nobody else has suggested anything: is the new hardware
> > susceptible to alignment errors in a way that the old hardware wasn't?
>
>The question is: how can we know? The ARM documenta
In our previous episode, Jonas Maebe said:
> >
> > Sorry, I forget to tell you that Marco has given the answer by using
> > -Xd.
>
> That should not be necessary.
-Xd has nothing to do with linker scripts from ld. It prevents FPC t_linux
code from adding default paths to the script.
For tar
In our previous episode, Bee said:
> I see. So FPC development has no planned innovation and no vision what it
> will become.
Yes. If there are no (central) resources to allocate, there is nothing much
to centrally plan.
> It just takes whatever available. Alright. Thank you. :)
No, there is mo
In our previous episode, Bee said:
> I'm looking at Indonesian translation, errorid.msg. There I see almost
> everything is translated, even the comment lines (with # prefix). I thought
> a complete and thorough translation must be useful somewhere in the
> documentation. Am I wrong?
There are cur
In our previous episode, Jonas Maebe said:
> After just having spent 2 days debugging an issue in fcl-res that could
> have been avoided by just using the assembler instead of by
> reimplementing object writers from scratch,
I do like the object writers mostly from a support viewpoint. The FPC
as
In our previous episode, Tomas Hajny said:
> > *FlashFiler was ahead of its time.* Client/Server database LAN-WAN. I have
> > currently running quite well on Windows 8.1 applications. Worth rescue and
> > do everything possible to port it to Free Pascal.
>
> Could you please clarify your idea behi
In our previous episode, Dennis Poon said:
> I can use the windows MMSystem unit but it only plays .wav file.
> How do I play .mp3 file?
I thought that using mcisendstring one could play all registered codecs.
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In our previous episode, Graeme Geldenhuys said:
> Does anybody know of an email or news (nntp) client written in Turbo
> Pascal's TurboVision, or in Free Pascal's FreeVision. Any links or
> screenshots would be very useful. Many thanks.
openxp.de and other crosspoint derivatives.
http://source
In our previous episode, Michael Schnell said:
> > So critical section is equal to posix mutex with
> > PTHREAD_PROCESS_PRIVATE attribute.
> Thanks for the clearness !
>
> (The OP of course just wants just this - synchronization between threads
> of a single application.)
On *nix for critical s
In our previous episode, Michael Schnell said:
> > For Critical Sections, FPC has the TCriticalSection object, is there a
> > TMutex object?
>
> AFAI understand, "CriticalSection" is the Delphi/fpc name for
> "POSIX-Mutex".
Critical sections are bound to the owning process under Windows, while
In our previous episode, Michael Van Canneyt said:
> > current situation
> > it *never* works correctly (not even for Linux).
>
> That is why we need an opaque type which will probably be used in more than
> one call.
> It needs to be investigated, hence the bugreport is needed.
(to Joergen:) do
In our previous episode, silvioprog said:
> > >[...]
> > > But it would be an nice feature in Free Pascal, something like the
> > "import"
> > > of Python and Java. =)
> >
> > Java requires a CLASSPATH for the imports to work, does it not?
>
> You can import one or more classes. E.g, you can use i
In our previous episode, Brian said:
> The fpGUI units were recompiled with directive -Ur
>
> When the helloworld.pas file is compiled using Geany (with -Ur and -Va) for
> some reason FPC can't find the unit (fpg_impl.ppu) called by fp_base , even
> though it is present in the folder with fpb_base
In our previous episode, Brian said:
>
> Is there any way to tell the compiler to just link existing .ppu and .o
> files ?
There are three things in such case:
- compile the immutable packages with -Ur
- find actually WHY the compiler doesn't want to use the .ppu's and get to
the root of the p
In our previous episode, Sven Barth said:
> > So the obvious question might be if the unit initialization really belongs
> > into the library initialization like that.
>
> The only other alternative would be to add the RTL initialization code
> to each exported function. I don't consider this a
In our previous episode, Sven Barth said:
> It is indeed true that all units are initialized once the main code block
> of the library is called, but you are still inside the library
> initialization initiated by the OS and thus you are subject to its
> restrictions which in the case of Windows inc
In our previous episode, Graeme Geldenhuys said:
> > My rule of thumb is physical cores + a percentage. (like 10-20%).
>
> Tell that to most developers out there, they clearly don't know that
> "rule of thumb". :-) Mozilla Thunderbird under Win7 shows 47 threads.
> EditPad Pro 7 shows 18 threads.
In our previous episode, Mark Morgan Lloyd said:
> > Hyperthreading doubles the execution stream logic, so that one core can
> > take two incoming streams of instructions. The idea is that when one thread
> > stalls, or executes unoptimal code, the other thread can run, increasing
> > utilization.
In our previous episode, Bernd said:
> If the CPU has hyper threading then these should show up as individual
> cores (CPUs). They call a "core" with 2 processors on it a "core" but
> each of these "cores" is actually two complete processors (cores in
> the conventional meaning of the word) that ju
In our previous episode, Xiangrong Fang said:
> If my application needs SPEED, i.e. take full advantage of CPU
> capabilities, and the application has no I/O operation at all (neither disk
> nor network), it seems no need to create threads more than the number of
> CPU cores ?hyper-threads)?
>
> A
In our previous episode, Martin Schreiber said:
> > basically stopped using it.
>
> Why does Free Pascal not invent a safe "with" similar as the "with" of
> MSElang?
The primary question is of course if there is a need for a new construct at
all. I don't know MSELang, but many new languages try
In our previous episode, Ched said:
> So, they with statement has at least one aficionados: me. Was the with
> statement present if the first
> versions designed by Wirth himself ?
Yes, but the problems are mostly because of the scoping complexity that OO
extensions like classes add. Specially b
In our previous episode, J?rgen Hestermann said:
> > -
> > d:=TreeRoot.SubDirs[Low(TreeRoot.SubDirs)]; // local var d
> > d^.DirLogged := true;
> > d^.DirHatFocus := false;
> > d^.SubDirsExpanded := true;
> >
In our previous episode, Hunter1972 said:
> > > I assume your polylines are basically an array of X,Y coordinates in
> > > single
> > precision + color information? If you supply examples of those, I'll see if
> > I can hack something together. (binary only, since it is a work codebase,
> > more t
In our previous episode, Sven Barth said:
> > Considering that the implementation is currently "Result := 1" for any
> > target that is no surprise ;)
>
> I've now implemented GetCPUCount for all Windows targets.
.. updating...
> For the BSD's
> I'd use sysctl, which would mean that I'd need t
In our previous episode, Sven Barth said:
> FPC 2.7.1 has TThread.ProcessorCount (it's a class property, so no instance
> needed) or System.CpuCount (ProcessorCount uses this). It's not yet
> implemented though for any system :/
I ran it to test if it made a difference between cores and hyperthrea
In our previous episode, Hunter1972 said:
> I am new in FPC and want to understand the correct(fastest) methods when
> drawing 2D graphics.
> The task is simple but extensive: to draw about 200 polylines with
> 5-20 points in each.
> I have made a test code in OnPaint event:
OpenGL is an
In our previous episode, Xiangrong Fang said:
> which one should be the *first* unit to use? cthread or cmem?
cmem.
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In our previous episode, Reinier Olislagers said:
> On 03/09/2014 13:28, fredvs wrote:
> > Hum, i try to dynamically load (and run) some freeBSD libraries with a
> > fpc-freeBSD-appliction.
> >
> > For testing, i use some library included in /usr/lib (so im sure that the
> > library is working on
In our previous episode, Michael Schnell said:
> More characteristics that can be differ in certain applications are
> - bit count
> - starting value
> - shift count (only data block bits or data block bits plus CRC bits
- Shift direction. msbit first, lsbit first, in case of wordwise crc also
Last night I googled some more. Conclusions:
1. the oledb.tlb isn't easy to find, but it does exist
https://code.google.com/p/py-com-tools/source/browse/trunk/sdk-tlbs/?r=2
Maybe it is in the full platform SDK, but I didn't have that
readily available.
The result doesn't compile, it's only a si
In our previous episode, Sven Barth said:
> >
> > Well, and SEH should be on by default for 32-bit I guess?
>
> Definitely! :)
>
> > Anyway the typelibs seems to mostly work:
>
> Do the generated units also compile?
Yes, the only problem is that they are not OLEDB as Delphi has the unit.
Probab
In our previous episode, Sven Barth said:
> > > it uses ADO as the 'native' layer.
> >
> > (afaik OLEDB, a layer deeper/older of which ADO is a superset, but
> conclusion is the same)
>
> Using our Typelibrary converter and a bit of time we could write a ADO
> driver for SQL-DB, then the FreeTDS l
In our previous episode, Michael Van Canneyt said:
> > Looking at the FPC 2.6.4 fcl-db source folder it seems that SqlDB does
> > have MS SQL Server support. What confuses me is that the readme.txt
> > files mentions that I must download FreeTDS sources and compile it with
> > MS Visual C++ (a comp
In our previous episode, Michael Van Canneyt said:
> > The program I am writing is going to run on the server which hosts SQL
> > Server, so client libraries should all be there. Do I still need this
> > FreeTDS library mentioned?
>
> I think yes, I don't think that MS-SQL server still provides a
In our previous episode, luiz americo pereira camara said:
> >
>
> It's not a simple parser. It has the ability to extract part of html
> through templates. See http://videlibri.sourceforge.net/cgi-bin/xidelcgi
There is xpath support in fcl-xml?
___
fpc
In our previous episode, luiz americo pereira camara said:
> You can try http://www.benibela.de/sources_en.html#internettools
That seems more something like sax_html fromt the fcl-xml package.
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h
In our previous episode, Marcos Douglas said:
> > It has (or at least had) a very simple to use HTML parser that was very
> > fast. If you don't come write with the above URL, I have some release
> > archives I know contains the code. Just let me know and I can make it
> > available.
>
> But the f
In our previous episode, fredvs said:
> /usr/home/fred/fpGUIlib/demos/demo_Java/libfpgui.so:
> /usr/home/fred/fpGUIlib/demos/demo_Java/libfpgui.so: Undefined symbol
> "operatingsystem_parameter_envp"
> ;-(
>
> So, fpc 2.7.1 does not do the trick...
>
> What can i do ?
First test it with a normal
In our previous episode, fredvs said:
> Aaarg, i have install fpc-freeBSD-64-bit.
Afaik the linuxator also works on 64-bit FreeBSD, so you can run 32-bit
Linux userland on 64-bit freebsd.
> Maybe with fpc-freeBSD-32-bit applications (on a freeBSD-64-bit system?) and
> Linux-libraries-32-bit will
In our previous episode, Graeme Geldenhuys said:
> I see the Free Pascal documentation (PDF and HTML) on the
> [http://www.freepascal.org] website is still v2.6.2
>
> Was it just an oversight on the website, or has the new offical
> documentation for 2.6.4 just not been generated yet?
For me the
In our previous episode, Mark Morgan Lloyd said:
> Going back to something less labour intensive, would it be possible to
> have s directive which has the effect that if a procedure isn't
> eliminated by smartlinking then the linker should warn if a specific
> library hasn't been linked?
ELF bi
In our previous episode, leledumbo said:
> > Because then all apps are linked to it, also the ones that don't need
> threads. Same for clocale and cwstrings.
>
> If the widestring manager could be made by ourselves, is it possible for
> thread manager as well?
You could make an own threadmanage
In our previous episode, Fabio Luis Girardi said:
> The same question that I posted on bugtracker:
>
> Linux, BSD, Unix, has another threaddriver than cthreads?
No.
> If no, why not
> make cthreads unit the default threaddriver for Unix?
Because then all apps are linked to it, also the ones th
In our previous episode, Sven Barth said:
> In principle you could even use the LCL without Lazarus.
> The question that strikes me here is why you would prefer Notepad instead
> of an IDE like Lazarus? An IDE simplifies coding a lot by providing various
> code completion and refactoring functional
In our previous episode, Howard Page-Clark said:
> > begin
> >button:=TSpeedButton.Create(self);
> >button.OnClick:=SpeedButton1Click(button);
>
> There are two errors.
>
> button should be a field in the TForm1 class. Declared as a local
> variable it will be inaccessible after CreateBu
In our previous episode, leledumbo said:
> > IMHO a substituting bad with worse is not a good reason. Java/CIL needs
> this
> > because its strings are immutable, and character access is expensive. We
> > don't share, nor plan to share that trait.
>
> I hope so, and with Delphi plans on making
In our previous episode, Michael Schnell said:
> But as we all know, the "index" notation asks for never ending (and
> unsolvable) discussion
Yes. Mostly from you though :-)
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In our previous episode, Michael Schnell said:
> Anyway "forking" fpc in such a way seems catastrophic.
We are not forking anything. We only accept the directive, and we don't have a
FM
in the first place to create a compatible fork.
> Regarding strings, there were several discussions to comp
In our previous episode, Jonas Maebe said:
(zerobasedstrings)
> They probably changed the default there for efficiency reasons (not having
> to subtract 1 from string indices all the time).
Considering what they lug on in compatibility(and that being a key selling
point), and how they went abou
In our previous episode, mokashe.ram said:
> Could any one give me sample code/example on reading user input
> from screen and writing it to
> output file (.txt).
See the highscore routines of the FPC demo games (fpctris, samegame)
___
fpc-p
In our previous episode, Fabio Luis Girardi said:
> Someone can say if this is a problem with my raspbian image or a problem
> with my FPC installation?
Did you use the raspbian provided (and patched!) FPC or did you build your
own?
Stock 2.6.4 does NOT run armhf systems, Raspbian patched theirs.
In our previous episode, Graeme Geldenhuys said:
> Would this be a good idea, or would there be some problems? I've tried
> various SSH clients (Linux, FreeBSD, Putty) and connected via SSH to my
> FreeBSD server and ran FPC's Text IDE without problems. I had to tweak
> the font for Putty, but then
In our previous episode, Tomas Hajny said:
> > ftp://ftp.uni-duisburg.de/local/systems/msdos/programming/fpkp/
>
> Thanks, it might be probably added to
> ftp://ftp.freepascal.org/pub/fpc/attic/.
Done.
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In our previous episode, mokashe.ram said:
> Ok thanks,
>
>but using untyped pointer how to mention size in GETMEM()?
>
> * GETMEM(markexam,'' ");*
You misunderstood. You don't substitute getmem/freemem (or new/dispose) of
just the markexam pointer, but for ALL pointers all
In our previous episode, mokashe.ram said:
> Can any one help me on raplacement of MARK and RELEASE function in free
> pascal...
>
>var
> markexam: pointer; // untyped pointer
> begin
> ...
>* mark(markexam);
> .
> Release(ma
In our previous episode, Juha Manninen said:
> On Wed, Jun 18, 2014 at 2:36 PM, Bart wrote:
> > The original code removes trailing spaces only, and Trim() removes
> > more than spaces (and it removes leading blanks as well).
>
> Filename := TrimRight(Filename);
or
Filename := TrimRightSe
In our previous episode, Michael Schnell said:
> On 05/28/2014 05:41 PM, Marco van de Voort wrote:
> > . But that means you need to use OS timing functions, and not ASM.
>
> Meaning either syscalls or vDSO.
>
> As in Linux syscalls do a usermode->Kernelmode->usermode
In our previous episode, Maciej Izak said:
> By Barry Kelly in comment :) :
>
> http://stackoverflow.com/questions/3443097/what-is-the-identity-pointer-before-a-ttypeinfo-there-for
>
> "all typeinfo fixups - pointers from one blob of typeinfo to another - are
> of type PPTypeInfo, not PTypeInfo,
In our previous episode, Marco van de Voort said:
> still to new a requirement to assume for general purpose code like RTL and
> FCL, if you agree to clip real old stuff.
_EVEN_ if you agree to clip real old stuff (read: anything Pre core2 intel
like Pentium D and Co
In our previous episode, Henry Vermaak said:
> On Wed, May 28, 2014 at 02:00:06PM +0200, Marco van de Voort wrote:
> > - Is rdtsc safe for CPUs that can vary clock of cores independently like
> > Core Mono? What if the process changed CPU to a different clocked core?
>
&
> In fact I do want the best possible stuff and not a fork. I am just
> trying to help (as I would like to use it in the said current project).
In that case some attention points:
- help implementing and testing fine grained timings on *nix. Now it only has a
special
case for linux.
- Seems h
In our previous episode, Michael Schnell said:
> > using it on Windows for the foreseeable future.
> Hmmm
>
> "parallel loop" and "future" in fact _is_ "compatible with Delphi": here
> Delphi Prism. (It's not the fault of Lazarus, that Delphi is not
> compatible with itself :-( .)
It is not a p
In our previous episode, Mattias Gaertner said:
> > I did note that the example said that it was flawed, but, foolishly,
> > as it turned out, I thought it meant 'flawed' rather than 'doesn't
> > work at all'.
>
> Do you mean this example:
> http://wiki.freepascal.org/Executing_External_Programs#A
In our previous episode, Michael Schnell said:
> - To through the callback event, create an instance and fill the data
> structure in the instance and then use TThread.Queue to through the event:
> procedure TmyThread.Execute
> begin
> ...
> AsyncEvent := TAsyncEvent.create;
In our previous episode, nitinjain said:
> I used same (Video Unit) but throwing runtime error* "Program Received
> Signal SIGSEGV Segmentation fault"*.
Did you follow all steps in
http://stackoverflow.com/questions/23563834/freepascal-identifier-not-found-memw/23700057#comment36526285_23700057
In our previous episode, Jonas Maebe said:
> >> 3. run fpcupgui.exe and successfully finished.
> >>using fpc svn version 2.6.4
> >>using lazarus svn version 1.2.2
> > FPC 2.6.x does not support cross compiling from win64 to win32 due to
> > the error you found below.
> > AFAIR, it's been fi
In our previous episode, Florian Kl?mpfl said:
> > Absolutely, but neither Free Pascal nor Delphi implement OpenMP.
>
> I wanted only to point out that personally I would first work on OpenMP
> support than implementing anonymous methods (which I consider anyways very
> un-pascalish) and closures
In our previous episode, nitinjain said:
> Thanks for your prompt reply on this.
> my code is like below, is there any option to implemet the same thing?
>
> ---
> PROCEDURE window_object.appear;
>
> VAR
>width_offset,
>heigh
In our previous episode, Xiangrong Fang said:
> I would like to know the benefit of making constructor / destructor
> virtual. As described here:
>
> http://c2.com/cgi/wiki?VirtualConstructor
>
> The benefit of virtual constructor seems related to "class reference". As
> far as I understand, it
In our previous episode, Graeme Geldenhuys said:
> And it just surprises me what features Xlib / X11 has - yet everybody
> seems so eager to replace it with something else (often with something
> less feature rich, yet tick the "cool" box). Sure X11 could do with some
> modernization, but I still t
In our previous episode, Graeme Geldenhuys said:
> > Just in case: not Delphi compatible.
>
> In this case I can't use it, because this project must stay Delphi
> compatible. Still a very useful tip though. Thanks again.
Then you must test with $ifopt, set a define if it is enabled, and then
rest
In our previous episode, Graeme Geldenhuys said:
> > maybe it's loading some config file anyway.
> > Do a strace and see if it opens a config file.
>
> 'strace' is not available/supported by 64-bit FreeBSD (only 32-bit
> FreeBSD).
That's because it is a port. The normal tool to use on BSDs is k
In our previous episode, Martin Frb said:
> > Free Pascal is candidate for SF project of the month april, up against
> > strong candidates as subversion for windows (the server, not tortoise) and
> > smplayer.
> >
> > Note that you need a SF login to vote:
> >
> > https://sourceforge.net/p/potm/dis
In our previous episode, Juha Manninen said:
> Maybe we could just add our own metadata wrapper instead of gzip or a
> zlib wrapper.
> Well, it does not sound like a clever thing to do.
>
> We have used tpabbrevia but it has a bug with very big files (like 6
> GB). Its code is not easy to understa
In our previous episode, Juha Manninen said:
> BTW, does anybody know of a Delphi compatible version of this compression lib?
> The new Unicode Delphis do not need to be supported.
> What about some other similar Delphi compatible lib?
Newer delphi's come with a zstream iirc, and contrary to D7(*)
FYI:
Free Pascal is candidate for SF project of the month april, up against
strong candidates as subversion for windows (the server, not tortoise) and
smplayer.
Note that you need a SF login to vote:
https://sourceforge.net/p/potm/discussion/vote/thread/c38203c8/
Marco
In our previous episode, Tomas Hajny said:
> > The two should at least match; and you will not be surprised to hear that
> > I think the linker file is correct :)
> .
> .
>
> It makes no sense to use absolute paths in debug information, because it
> would make distribution of units compiled with
In our previous episode, Mattias Gaertner said:
> >
> > It's a hack ?
>
> AFAIK the PWD is the official thing and used by other console tools as
> well.
afaik:
1) it is an official thing only of the shell, not the "system".
2) it assumes that any program doesn't change paths inbetween.
(eith
In our previous episode, Torsten Bonde Christiansen said:
> >> the construct where forward declared classes is possible.
> > That's a separate language enhancement request, read
> > http://www.freepascal.org/faq.var#extensionselect
> Since this is already possible in objfpc mode (at least partially
In our previous episode, Torsten Bonde Christiansen said:
> >> Should I add this to the bugtracker?
> > Yes. The code with Tfoo and TBar above also shouldn't not compile, at least
> > not in Delphi mode.
> Should I report this as a bug where this construct is not allow at all
> (not just Delphi mo
In our previous episode, Bart said:
> > Yes. The code with Tfoo and TBar above also shouldn't not compile, at least
> > not in Delphi mode.
>
> The double negative is intended here?
No. So Delphi refuses when TFoo and TBar are declared at the top. IMHO
rightfully so.
Both Delphi and FPC also ref
In our previous episode, Torsten Bonde Christiansen said:
>
> The problem seem to be that the a descendant enumerator class overriding
> a virtual method cannot
> return a class which i only forward declared.
>
> If the TFoo and TBar classes are moved above the TBarListEnumerator the
> code com
In our previous episode, Mark Morgan Lloyd said:
> > IMHO the universal handle (for e.g. IPC related handles and file handles) is
> > not a portable concept to begin with.
>
> I think the concept of a handle as an opaque type is universal. What
> isn't safe is any assumption of consistent behavio
In our previous episode, Michael Van Canneyt said:
> > Question: what is the best way to maintain code that must compile with
> > both FPC and Delphi2007?
> > The obvious solution is to use IFDEF and define a new type, say TMyHandle.
> > FPC's libraries however take care of many platform difference
In our previous episode, Tomas Hajny said:
> Are they?
>
> Anyway - as far as I can see, the usual solution appearing with other
> programs on MS Windows is either defaulting new version to the directory
> used for the previous one and/or suggestion that you should uninstall the
> previous version
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