I think we should run the compiler directly to avoid confusion. I don't think people would like messing with make files. I have used the KDevelop app for some time now and this is the method by which they run GCC and is also the reason so many people have trouble with it. I think we can get more reliability it we run it ourselves.

Cliff

+ From: codepunk
+
+ I think we should run the compiler directly to avoid
+ confusion. I don't think people would like messing with
+ make files. I have used the KDevelop app for
+ some time now and this is the method by which they run GCC
+ and is also the reason so many people have trouble with it.
+ I think we can get more reliability it we run it ourselves.

Same here.
Makefiles are OK if you want to build a complete project (ie Lazarus) without IDE. I think from the IDE we should call the compiler directly.

Marc

I agree with Cliff;

Calling the compiler directly eliminates possible bugs in Makefiles, false dependencies, eliminates the need for make, and will work faster...

Not to mention that make gets totally confused if you have interdependency of units.

You can use some makefile kind of project group (If you look at the project group in Delphi, you'll see that it _IS_ a makefile); but I wouldn't put any rules in some targets...

Michael.

I actually have some info on how to do this, including how to capture the output. I will try to get the compiler working within the next couple days. I already have the compiler options dialog created, so it just needs to put those options together and send them to the compiler. I will see if I can get it going.

Curtis

I quickly tried the TProcess class.
I used the following:

var
CProcess : TProcess;
Begin
CProcess := TProcess.Create('ppc386 lazarus.pp',[poRunSuspended]);
CProcess.ShowWindow := true;
CProcess.Execute;
end;

I ended up with a few errors and it crashed Lazarus. Am I using it correctly or am I missing something. Shane

>> 04/17/00 03:00AM >>>

To keep things portable, have a look at the TProcess class in the FCL. This allows you to spawn the compiler, and capture it's output in streams. Using the asyncio unit you can make it as if it was a background process. There are example programs for both units.

Both components are well-tested. TProcess is even used in commercial apps...

Michael.

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In this case you can use a response file: Just write all parameters to param.tmp for example and the call the compiler with
ppc386 @param.tmp myprogram.pp
To do this with GNU Make is much harder afaik. Only Borland Make provides a response file generated by the make utility.

Marc Weustink wrote

Same here. Makefiles are OK if you want to build a complete project (ie Lazarus) without IDE. I think from the IDE we should call the compiler directly.

Or, what I have in mind for Kassandra: The IDE can build a project without 'make', but it can create an external makefile if necessary...

- Sebastian

I got it to work. I had to add the path to ppc386.... Shane

>> 04/17/00 09:10AM >>>

I quickly tried the TProcess class.
I used the following:

var
CProcess : TProcess;
Begin
CProcess := TProcess.Create('ppc386 lazarus.pp',[poRunSuspended]);
CProcess.ShowWindow := true;
CProcess.Execute;
end;

I ended up with a few errors and it crashed Lazarus. Am I using it correctly or am I missing something. Shane

>> 04/17/00 03:00AM >>>

To keep things portable, have a look at the TProcess class in the FCL. This allows you to spawn the compiler, and capture it's output in streams. Using the asyncio unit you can make it as if it was a background process. There are example programs for both units.

Both components are well-tested. TProcess is even used in commercial apps...

Michael.

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"unsubscribe" as the Subject
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Look at the unitlist class and make sure the compiler compiles the first entry in this class. The first unit should be the project unit. This only should occur when they select Build Project of course...

Shane

>> 04/16/00 11:05PM >>>

I actually have some info on how to do this, including how to capture the output. I will try to get the compiler working within the next couple days. I already have the compiler options dialog created, so it just needs to put those options together and send them to the compiler. I will see if I can get it going.

Curtis

I want to recreate fpcmake to have multiple backends. One would be an internal dependency solver and one would be a Makefile writer. This unit can then be used in lazarus/kassandra.

Peter

Can this be done similar to the way a C++Builder project is handled: ie. Create a makefile. Then the ide would create the makefile and then call make to compile, rather than calling ppc directly.

Or is there any merit to this at all?

Jeff.

I think there is no need for this: FPC has a build in make while C compilers doesn't have such a thing. Even more, for cyclic dependend units, you can't create a makefile.

+ From: Peter Vreman
+
+ I want to recreate fpcmake to have multiple backends. One would be an
+ internal dependency solver and one would be a Makefile
+ writer. This unit can then be used in lazarus/kassandra.

As far I can see is it only nessecary to have makefile with only the exe (and not the units)

Marc

Here are the screenshots of hello world in QT and GTK.

Qt is at http://www.codepunk.com/files/hqt.jpg
GTK is at http://www.codepunk.com/files/hgtk.jpg

To bad they look almost exactly the same. Or maybe that is a good thing, yes methinks it is good.

All I did to build it is compiled the gtk one then i blew away all the old ppu's and .o files. I opened interfaces.pp and uncommented qt and recompiled pretty cool stuff.

Cliff

The showwindow doesn't work under Linux yet. The component was originally written for Win32 and not all of the windows features have been ported.

Look at the testproc.pp example; the options you should use for compiling are in that example:

Var S : TProcess;
    Buf : Array[1..BUFSIZE] of char;
    I,Count : longint;
    Line : String
begin
  S:=TProcess.Create('/path/to/ppc386 myfile.pp',[poExecuteOnCreate,poUsePipes,poNoConsole]);
  Repeat
    Count:=s.output.read(buf,BufSize);
    // Display buf in a memo, or parse it...
  until Count=0;
  writeln;
  S.Free;
end.

Ok. The only reason I asked is that it is difficult to get everything working with the command line, especially on Win9x where the command line length is very constrained. It seemed that since everything now can be done via makefile, that it would be easier to get this working than incorporating the make functionality. I hadn't realized the difficulties involved in unit interdependancy.

Jeff.

To keep things portable, have a look at the TProcess class in the FCL. This allows you to spawn the compiler, and capture it's output in streams. Using the asyncio unit you can make it as if it was a background process. There are example programs for both units.

Both components are well-tested. TProcess is even used in commercial apps...

Michael.

Where can I find the examples for these? I found the test program for TProcess in the fcl/tests directory, but I can't find the example for the asyncio class.

Curtis

+ From: Jeff Wormsley
+
+ Ok. The only reason I asked is that it is difficult to get
+ everything working with the command line, especially on Win9x
+ where the command line length is very constrained.

There you have a point

+ It seemed
+ that since everything now can be done via makefile, that it
+ would be easier to get this working than incorporating the
+ make functionality. I hadn't realized the difficulties
+ involved in unit interdependancy.

Hmm... The working Makefiles as you see them is just no the surface. They compile everything for any target to solve unit interdependancy. This is not the way to go in the future.

Marc

One thing that would be cool to add soon would be the ability to compile within Lazarus. All I want to be able to do a spawn the compiler and add a define to it. The define would be to define GTK or QT for selecting a widget.

How do I do this under Linux? How do I execute the ppc386 compiler or makefile?
Also, I would like to capture the output to show in a window in Lazarus...

---------------------------------------
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Hmm.... The safest way I think would be to run the compiler off of a shell command blowing the output of the compile to temp file and then showing that in a memo component. This way if the compiler explodes in a ball of fire it will not take the ide down with it. Trust me I seen it go up in smoke quite a few times in the last couple of days while implementing the QT hack.

Cliff

I would just write a wrapper script which redirects the output to /dev/null:
yourprogram >/dev/null 2>/dev/null

"2>" redirects StdErr

Under Windows and DOS you would use a batch file
yourprogram >null

- Sebastian

Curtis White wrote

Where can I find the examples for these? I found the test program for TProcess in the fcl/tests directory, but I can't find the example for the asyncio class.

See the kassandra sources for an example. I thought Sebastian guenther added an asyncio example to the fcl directory, but apparently he hasn't :(

Michael.

Hi, all!

How to BYPASS a StdOut in Linux system of my program? For example, I have compiled a some program, and run it from an terminal. And the user have a SHOCK, when see a "program comments" in the terminal. When the user run the program with apersand (&) like:

$ ./someprog&

...then program is halted. Is it possible to disable it? (Using Lazarus LCL for Linux)

Thanx.
Regads,
Bogdan M.Maryniuck

Marc,

One of the problems seems to be that event triggers are getting called after the gtk lib and or qt libs are calling it quits. I ran into this same problem when implementing the QT library. The lib terminate gets called and then a click event still fires. This causes a core since a access violation occurs when the click tries to access a pointer that has already been destroyed or derefed.

There may be some others but this is one of them.

Cliff

Sebastian G�nther wrote

BTW, is it possible to use StdIn for this? For example this way: ppc386 @- myprogram.pp

Not yet.

Be careful! It isn't that easy, for several reason the compiler reads the config file twice!

Michael Van Canneyt wrote

No, it is not (although it would be extremely easy to add). but I see no use in being able to do this,

you can pass command line of arbitrary length to the compiler without having to use temporary (immediate) files.

even more I think it would be very dangerous since the compiler would only start compiling of eof() is reached, which could be 'never' and this is potentially dangerous.

Why? This is just a feature which you can use or you don't use it. It is meant to be there for IDEs and similar tools, and the "-" filename interpretation as StdIn is very common under Linux.

- Sebastian

No, it is not (although it would be extremely easy to add). but I see no use in being able to do this, even more I think it would be very dangerous since the compiler would only start compiling of eof() is reached, which could be 'never' and this is potentially dangerous.

Michael.

Can this be added in the near future? I shouldn't be really hard to do ;) But very convenient for the IDEs.

- Sebastian

Michael Van Canneyt wrote

See the kassandra sources for an example. I thought Sebastian guenther added an asyncio example to the fcl directory, but apparently he hasn't :(

Ahem ;)
i have added "asiotest" to the fcl/tests directory.

- Sebastian

Florian Klaempfl wrote

In this case you can use a response file: Just write all parameters to param.tmp for example and the call the compiler with ppc386 @param.tmp myprogram.pp

BTW, is it possible to use StdIn for this? For example this way: ppc386 @- myprogram.pp

- Sebastian

Ah well :(

It's just one line to add. I'll have a look.

Michael.

+ From: Bogdan M.Maryniuck (UAB Diprintas)

+ Hi, all!
+ Here is a one (small) trouble, but not too sweet.
+ When user is CLOSING my program by:

[snip]

+ Segmentation fault
+ Core is dumped

This is a known issue, since it happens on exit it hat a low proprity for me.

+ buddy... user always can see a red file (about ~1 meg) with
+ 'core' name -( How to fix it?

If you're using bash as shell look at the ulimit -c option Don't know for uther shells.

Marc

You may disable the stdout output by issuing

./someprog >/dev/null

or similar. Not sure how to redirect stdout inside Lazarus, though ...

Michal Bukovjan

Hi, all!
Here is a one (small) trouble, but not too sweet.
When user is CLOSING my program by:

procedure someform.button1click(sender:tobject);
begin
    close;   // closing *main* form and exiting the application
end;

...then (in Linux platform -- I don't know about Win32):

Segmentation fault
Core is dumped

Because some memory allocation somewhere is not properly handled (or not???).
Hmm... It's not too bad for 0.1 version: program is terminated and worked properly,
buddy... user always can see a red file (about ~1 meg) with 'core' name -( How to fix it?
Ok, I did it by cr-r-r-reated some file, which is runned my program like:

./program > /dev/null # Removing a garbage from terminal, if user # is runned from it
rm core # Remove the 'core' file ;)

-- remove a StOut & User Shock, when user is runned my program from an terminal,
and remove a 'core' file after my program crash, when exiting ;-)))) Ok, boys, now how
I can to fix it ***inside*** the Lazarus?

Thank you (all).
Best regards,
Bogdan M.Maryniuck