Maximum aligned attribute value in NXP GCC 9.2 Compiler

KKumar — Wed, 02 Nov 2022 06:48:21 GMT

Hi,

I am testing aligned attribute of variable.

It is working if I aligned variable "x" to 16 bytes and able to see in map file (0xc + 0x4 = 16)

But when I trying to align the variable to 64 , it aligned only to 32 bytes(0x1c + 0x4 = 32)

why it is not aligned to 64 bytes?? Is maximum alignment value 32 bytes??

Thanks

Kishore

Re: Maximum aligned attribute value in NXP GCC 9.2 Compiler

jiri_kral — Wed, 09 Nov 2022 11:14:44 GMT

Hi,

yes, there is linker limitation for maximal alignment size. GCC provides __BIGGEST_ALIGNMENT__ macro.

You can find more details in gcc documentation: