S32K1 weak cannot be overridden by strong definitions.

[wuxianlong]

Hi，NXP

We encountered an issue where a weakly defined interrupt handling function could not be replaced by a strong definition in the library. When we compiled the SDK into a static library and added it to the APP, we found that the CAN0 interrupt handling function could not be strongly defined.

The IDE I am using is S32DS ARM 2.2, the SDK version is 3.0.0, and the compiler version is gcc 6.3.

Below is the situation of my Demo test:

① If I keep the weakly defined interrupt handling functions in the startup, the content of the interrupt vector table will be the weakly defined functions.

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② If I comment out the weakly defined interrupt handling functions in the startup, the CAN interrupt handling function can be correctly defined.
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What is the reason for this phenomenon? The source files of my test Demo and the files after compiling the static library are attached.

[Senlent]

Hi@wuxianlong

I didn't fully understand your question.

I tested the project you provided, "S32K146_UJA1169_SDK300.zip," and followed your method to disable "def_irq_handler CAN0_ORed_0_15_MB_IRQHandler."

The compilation results for both were exactly the same, with no difference whatsoever.

[wuxianlong]

Hi,@Senlent 

Thanks for your support. The problem that a weak definition cannot be replaced by a strong definition only occurs when using the static library file .a and using a strong definition in the static library.

Based on S32K146_UJA1169_SDK300, I compiled the SDK into a static library (.a file) and loaded it into the application, such as my S32K146_UJA1169_Lib_SDK300. Then I can reproduce the problem. The CAN0_ORed_0_15_MB_IRQHandler will not be loaded into the interrupt vector table unless I comment out the weak definition.

Best Regards,
xianlong

[Senlent]

Hi@wuxianlong

This is probably related to some compiler settings. I will deal with your problem when I have time; it's not an urgent issue.

[wuxianlong]

What is the reason for this phenomenon? The source files of my test Demo and the files after compiling the static library are attached.