Update SDK 17.0.2 to SDK 17.1.0 -> Pe020: identifier "x" is undefined

[steinisoft]

After I changed from SDK 17.0.2 to SDK 17.1.0 I get for the example project "blinky_FreeRTOS_pca10040" during the compilation with IAR Embedded Workbench IDE - Arm 8.50.9 the error message:

Error[Pe020]: identifier "x" is undefined

The problem happens in the file nrfx_coredep.h in line 161.

// Align the machine code, so that it can be cached properly and no extra
// wait states appear.
__ALIGN(16)

There is some problem at __ALIGN(16). Is there any solution for that?

I compared the project and configuration files of SDK 17.0.2 and SDK 17.1.0 but they are completely equal. So it can be a problem in the library or with IAR. I would be happy if you can give me a solution for that problem.

[steinisoft]

After some more research about that topic I found the solution of the problem. It is a problem with IAR 8.xx.x, which is also mentioned in:

https://devzone.nordicsemi.com/f/nordic-q-a/79818/build-issue-with-nrf52832-please-help-me/330379

The solution is to replace the file modules/nrfx/mdk/compiler_abstraction.h with the file from download

https://www.nordicsemi.com/Products/Development-tools/nRF-MDK/Download#infotabs

of Verison 8.42.0 GCC 3-clause BSD license

After doing this, everything is running correctly.

[PabloL]

Hi,

It seems to be a mistake in "compiler_abstraction.h" line 140:

  #if (__VER__ >= 8000000)
        #ifndef __ALIGN
            #define __ALIGN(n) __attribute__((aligned(x)))
        #endif

Shouldn't the parameter be 'n' or 'x' in both cases?

I changed it and compiled without errors.

[Vidar Berg]

Yes, both paramaters need to be the same, so your fix is correct.