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

Question

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 · Accepted Answer

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 · Answer

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.

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

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