CW11.1 S12Z L4119 warning

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CW11.1 S12Z L4119 warning

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kef2
Senior Contributor IV

Hi,

WARNING L4119: Linker align value 4 is overwritten by its compiler align value 4 for object sgn

Looks like this warning is not documented I see it not specified in MCU\Help\MCU_Build_Tools_Utilities.pdf. 

It happens for const data object like

const long sgn[] = {0,1};

when I try to enable code aligning to DWORD boundary in PRM file:

ROM = READ_ONLY 0xFD0000 TO 0xFFFDFF ALIGN 4;

If this way to align is not appropriate then how else could I fix code misalignment? As well why such linkers complain if 4==4? S12Z CPU seems burning additional bus cycle for queue refill every time jumping to not double word aligned address. Compiler seems supporting code alignment as I see single byte BGND instructions (perhaps just 0x00 code and not BGND) inserted between functions in source disassembly listings. But since linker optimizes unused functions out, code alignment gets lost. ALIGN 4 for whole ROM segments helps making all functions aligned. Shouldn't compiler notice foo()'s size including code alignment, this way code alignment wouldn't be lost even without ALIGN in PRM?

Thanks

Edward

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3 Replies

551 Views
ZhangJennie
NXP TechSupport
NXP TechSupport

Edward

please send me your demo project, I will check it directly.

Thanks!

Best Regards

Jun Zhang

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551 Views
kef2
Senior Contributor IV

Hello Jun Zhang,

See attached

Edward

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551 Views
ZhangJennie
NXP TechSupport
NXP TechSupport

Edward

I have reproduced this issue. I need check it with development . I will let you know once I get feedback. 

Thanks,

Jun Zhang

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