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Author Topic: Lazarus doesn't recompile changed units  (Read 8206 times)

Grahame Grieve

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Lazarus doesn't recompile changed units
« on: September 10, 2020, 02:28:19 am »
So I am porting a rather large project to Lazarus. I'm finding that if I change a unit that has already been compiled, then I need to do a clean and build, otherwise the unit I've changed won't be recompiled.

I can't find any settings related to this...
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af0815

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Re: Lazarus doesn't recompile changed units
« Reply #1 on: September 10, 2020, 06:53:17 am »
Is the changed source correct touched with a newer date/time than the old version.

What System is used Windows, Linux or Mac ?

I have this seen only if the sourcefile (and compiled file) have not correct dates, maybe in future by accident.
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Thaddy

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Re: Lazarus doesn't recompile changed units
« Reply #2 on: September 10, 2020, 11:02:26 am »
-B
With that I mean a rebuilt is usually unavoidable.
« Last Edit: September 10, 2020, 11:13:39 am by Thaddy »
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JuhaManninen

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Re: Lazarus doesn't recompile changed units
« Reply #3 on: September 10, 2020, 11:07:33 am »
The compiler does not notice if an .inc file is changed. With unit files it should work correctly.
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marcov

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Re: Lazarus doesn't recompile changed units
« Reply #4 on: September 10, 2020, 11:46:08 am »
If you can't reproduce with a small project, compiling the project with -vt might also give some insight. That logs recompilation decisions.
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Ñuño_Martínez

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Re: Lazarus doesn't recompile changed units
« Reply #5 on: September 10, 2020, 11:47:27 am »
Also, INLINEd procedures/methods doesn't force recompilation of units that use such procedure/method while INTERFACE declaration doesn't change, so behavior doesn't change.
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Grahame Grieve

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Re: Lazarus doesn't recompile changed units
« Reply #6 on: September 12, 2020, 02:08:34 am »
I'm changing the interface of compiled units, so it's not one of the edge cases. It's happening all the time, not just occasionally or once off.

The .pas file is 6 minutes more recent that the .ppu and .or files for it. It doesn't make any difference whether it's in the project or just on the search path.  It doesn't matter whether the file is open in the IDE or not

No, I can't reproduce this with a small project. It only happens (so far) with my very large project (~320 units in the .lpr, and that's about half what's in the project)
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Grahame Grieve

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Re: Lazarus doesn't recompile changed units
« Reply #7 on: September 12, 2020, 02:09:10 am »
how do I compile with -vt?
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furious programming

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Re: Lazarus doesn't recompile changed units
« Reply #8 on: September 12, 2020, 02:13:29 am »
Check this option in the Project Options window (see attachment).
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Grahame Grieve

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Re: Lazarus doesn't recompile changed units
« Reply #9 on: September 12, 2020, 03:00:07 am »
It didn't make any difference; there's no additional notes in the output
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jamie

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Re: Lazarus doesn't recompile changed units
« Reply #10 on: September 12, 2020, 03:17:40 am »
have you tried the "Always BUILD even if nothing changes"?

Its in the Project objects under misc.....

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Grahame Grieve

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Re: Lazarus doesn't recompile changed units
« Reply #11 on: September 12, 2020, 03:33:56 am »
I just did, and still nothing is rebuilt.
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avra

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Re: Lazarus doesn't recompile changed units
« Reply #12 on: September 12, 2020, 09:16:27 pm »
That is not a normal behavior so you should try Lazarus reinstallation
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Grahame Grieve

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Re: Lazarus doesn't recompile changed units
« Reply #13 on: September 15, 2020, 08:56:23 am »
ok. I reinstalled. Didn't make any difference. It's just the one very large project that does this; I can't reproduce it with smaller projects
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Martin_fr

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Re: Lazarus doesn't recompile changed units
« Reply #14 on: September 15, 2020, 10:15:17 am »
- Are all the units in the project? (listed in project inspector?)
- Or if they are in packages, are they listed in that package?

It may not be enough that they are in the relevant folder, they should be in the project/package inspector.

Are they all in the same folder, or are they in different sub/folders? How are other folders included.


And one case that sometimes may cause issues: Circular unit references, in combination with inline or generics. (Not sure about the exact circumstances needed to get an issue)
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