[Lazarus] Debugging in Libraries.

[Donald Ziesig]

On 01/18/2016 03:13 PM, Martin Frb wrote:
> On 18/01/2016 18:34, Donald Ziesig wrote:
>> Hi All:
>>
>> I have encountered a problem doing things that used to work. (Using 
>> Lazarus 1.4.4 on Linux and 1.4.2 on Raspbian)
>>
>> Specifically, I can no longer step into subprograms in library units, 
>> and when I set a breakpoint in the library code it is colored dull 
>> green as opposed to bright red in the main program. Some, but not 
>> all, of the library code is implemented using generics.
>>
>> I can't see anything I am doing differently than before (except that 
>> I copied the entire source for the program and library from a 
>> Raspberry PI, including the configurations.  The PI also had this 
>> problem).
>
> Dull green, usually (check debug output window) means that gdb 
> returned, that there is on code on the requested line/number.
will do.
>
> With generics, usually the oposite is the case, there are several 
> blocks of code containing the location (and on windows, I have seen 
> gdb handling that, at least in some cases).

come to think of it, IIRC gdb handled generics in windows, but that was 
back on Lazarus 1.0.  I have been working exclusively on Linux and 
Raspbian for the past 2 years.
>
> The question then is, if fpc did generate sufficient debug info or if 
> gdb has an issue.  (try stabs and dwarf)

will do.
Forgot to mention that gdb itself occasionally crashes when working 
around this code!

>
> ensure you disable "inlining"

where?
>
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>
Martin,

Thanks for the pointers.

  I discovered something since I wrote the last email:  gdb works 
(except for occasional failures in generics) if I compile the whole 
thing (Run | Cleanup and Build ...) in Linux.  Lazarus itself is 
protected so I have to skip the errors.   (I just upgraded this laptop 
to an SSD so the Cleanup and Build runs faster than just-plain Compile 
on the original HDD ... Yippy!!!).  I haven't tried it on Raspbian yet.

Don