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Author Topic: [SOLVED] Is it possible to jump into C code from Lazarus? If yes, when/how?  (Read 4927 times)

cpicanco

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[SOLVED] Is it possible to jump into C code from Lazarus? If yes, when/how?
« on: September 25, 2023, 08:32:19 pm »
Hi everyone,

I am receiving an "ActiveX not available" error from SDL_GetError when calling SDL_Init(SDL_INIT_VIDEO). I am wondering what should I do with Lazarus to known in which line this error is happening in the C code (with step into, F7). Where should I place the header and source SDL files?

Best,
R
« Last Edit: November 12, 2023, 03:37:40 pm by cpicanco »
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cpicanco

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Re: SDL2 debug
« Reply #1 on: September 26, 2023, 03:43:25 pm »
Hi everyone,

Please, shed some light on this. Is it possible to jump into C code (F7)? I am getting a weird "activex not available" error when calling:

if SDL_InitSubSystem(SDL_INIT_VIDEO) < 0 then begin
...
end;

The strange thing is that this error was NOT happening yesterday on my own machine. I found this error running on a Windows 7 machine. And now it happening on my Windows 11 machine. What the hell is happening??
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Zvoni

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Re: SDL2 debug
« Reply #2 on: September 26, 2023, 03:46:21 pm »
Quote from: cpicanco on September 26, 2023, 03:43:25 pm
Is it possible to jump into C code (F7)? I am getting a weird "activex not available" error when calling:
No
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cpicanco

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Re: Is it possible to jump into C code from Lazarus? If yes, when/how?
« Reply #3 on: September 26, 2023, 07:06:25 pm »
I remember lazarus jumping into C code. Am I allucinating?  :o
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ccrause

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Re: Is it possible to jump into C code from Lazarus? If yes, when/how?
« Reply #4 on: September 26, 2023, 07:18:15 pm »
Quote from: cpicanco on September 26, 2023, 07:06:25 pm
I remember lazarus jumping into C code. Am I allucinating?  :o
I think it is possible, but then the C object/library needs to contain the necessary debug information.
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zeljko

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Re: Is it possible to jump into C code from Lazarus? If yes, when/how?
« Reply #5 on: September 26, 2023, 07:49:23 pm »
Under linux I'm regulary jumping into Qt c-bindings and from there regulary to Qt c++ sources with gdb, and yes, from Lazarus. Of course debug info and dev packages should be installed for that scenario.
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Dzandaa

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Re: Is it possible to jump into C code from Lazarus? If yes, when/how?
« Reply #6 on: September 26, 2023, 07:54:12 pm »
Hi,

Yes, you can :)

read this:

https://downloads.freepascal.org/fpc/docs-pdf/CinFreePascal.pdf

Have a nice day.

B->
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cpicanco

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Re: Is it possible to jump into C code from Lazarus? If yes, when/how?
« Reply #7 on: September 27, 2023, 01:21:48 pm »
Thank you people! You are awesome!

Just to update the SDL2 issue https://github.com/libsdl-org/SDL/issues/8296. It turns out that it was related to SDL_VIDEODRIVER windows system environment variable.
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PascalDragon

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Re: Is it possible to jump into C code from Lazarus? If yes, when/how?
« Reply #8 on: September 28, 2023, 09:31:58 pm »
Quote from: Dzandaa on September 26, 2023, 07:54:12 pm
Yes, you can :)

read this:

https://downloads.freepascal.org/fpc/docs-pdf/CinFreePascal.pdf

This is a different topic. cpicanco asked to debug into the C-code. Calling it is already obvious by them using SDL functions. And debugging requires the C-code to have (compatible) debug information available.
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cpicanco

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Re: Is it possible to jump into C code from Lazarus? If yes, when/how?
« Reply #9 on: November 12, 2023, 03:37:18 pm »
Quote from: zeljko on September 26, 2023, 07:49:23 pm
Under linux I'm regulary jumping into Qt c-bindings and from there regulary to Qt c++ sources with gdb, and yes, from Lazarus. Of course debug info and dev packages should be installed for that scenario.

Thank you, I will keep that information in mind!
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Martin_fr

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Re: [SOLVED] Is it possible to jump into C code from Lazarus? If yes, when/how?
« Reply #10 on: November 12, 2023, 05:39:38 pm »
You can step into C code, if you use GDB as debugger backend.

Mind though that for evaluating WATCHES the IDE pre-translates for gdb, so if an expression should be watched you may need to do "pascal style".

---
FpDebug is not tested for that (yet). So maybe, maybe not. 
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