External compiled program works but faulty in the IDE
lazarus / 13-General

----------------------------------------------------------------------
MikeFinch · 2018-05-24 06:38

I use Mageia 6 with Lazarus 1.8.2. I used Pierre Muller's four .o
files to overwrite those in the rtl subfolder to successfully remove
the "crtbeginS.o not found, this will probably cause a linking error"
warnings - the first of two similar warnings.
The point of this post is that the compiled program that I am tweaking
at the moment does not match with the same code run in the IDE.
Two windows appear (that are coded for) in the compiled program but in
the IDE the main window (which fills the screen) brightens a little
and becomes frozen. I have to use ctrl-alt-esc to apply the dreaded
skull-and-crossbones icon to kill the program (my program, not
Lazarus!).
Is there a simple quick answer to this? Otherwise I would have to send
someone all of the code to demonstrate the quandry.
Is there some bug in the IDE?
Another thing I have noticed is that (seemingly) too may showmessages
seem to sometimes "upset" the system : won't compile. Is this my
imagination or is there a rational reason for this?
I am using procedural coding, not object-oriented.
MikeFinch

EXTRA MATERIAL!!


To Pierre Muller ==> I changed the four files in the subfolder rtl as
you suggested. In the IDE and after rebooting the computer they seemed
to do the job : the two error messages disappear (a brief mention of
Florian something-or-other appears instead). However the two error
messages then reappeared next time I ran my program. What is going on?
Also I am STILL having those other problems : when I run my program
the two forms appear as they should, but only when I use a showmessage
prior to displaying the form(s). When I comment out the showmessage
line the main form freezes and brightens a little. WHAT ON EARTH IS
GOING ON? It seems plain illogical.
Is this a Lazarus thing, a Mageia 6 thing (the new Plasma graphics) or
what?
I wish someone could help!
MikeFinch

MORE

Moments after sending the EXTRA MATERIAL I uncommented 'heaptrc' in
the .lpr file. THIS SEEMS TO SOLVE THE PROBLEM [?] but what does
heaptrc do? I'm no good at the technical innards of Lazarus; maybe
someone will care to explain what is going on ...
MikeFinch

----------------------------------------------------------------------
jamie · 2018-06-05 00:14

heaptrc ( heap trace) reports memory usage and left over memory that
wasn't released and helps you to
locate where the possible areas can be that are causing the leaks.

 It is a wedge into the memory manager so it can create a tracked list
of allocations and deallocations, starting memory
and ending memory..

 When your program exists it will popup a dialog screen showing you
the results

----------------------------------------------------------------------
Thaddy · 2018-06-05 10:32

Quote from: MikeFinch on May 24, 2018, 08:38:10 amI use Mageia 6 with
Lazarus 1.8.2. I used Pierre Muller's four .o files to overwrite those
in the rtl subfolder to successfully remove the "crtbeginS.o not
found, this will probably cause a linking error" warnings - the first
of two similar warnings.
That's silly. To remove the crtbegin/end warnings you should include
the path to the current GCC lib files. That's all. It does not need
any patches. And the warning is harmless in most cases.
E.g.:
Code: Bash  [Select][+][-]window.onload = function(){var x1 =
document.getElementById("main_content_section"); if (x1) { var x =
document.getElementsByClassName("geshi");for (var i = 0; i
-Fl/usr/lib/gcc/arm-linux-gnueabihf/6.3.0This path may differ on
Mageia but it is there.
Alternatively find out where your current GCC is (whereis GCC && gcc
--version), match it to the ./lib with the same version and export
GCCLIBDIR=<that path> as an environment variable.
Second alternative: FPC supports GCCLIBDIR=<that path> as a makefile
setting, but that is for the compiler and rtl only.
Third (best option) include it in /etc/fpc.cfg as -Fl option'. If you
use multiple fpc.cfg's with different paths, include it in all of
them.

Hey, presto: warnings are gone....