802_15_4_lib_iar.a built from IAR 8

[eboris]

I am using IAR version 8.30.2 . When I try to build the example project is the nRF5_SDK_15.3.0_59ac345 for 802.15.4 for the wireless UART I get a build error:

wchar_t in 802_15_4_lib_iar.a was built with a size of 16-bits, The application file build with wchar_t of 32-bits. 

Ok - I have seen several posts about this issue. They recommend that the 802_15_4_lib_iar.a file be replaced with a version that was built with IAR 8 that would have a wchar_t width of 32-bits. My question is where can I get this updated 802_15_4_lib_iar.a file? I don't have access to the source code for this library to build it myself. Is it in a different SDK? Which one?

[Vidar Berg]

Hello,

You may use the _gcc variant of the library in IAR 8. Excerpt from the SDK release notes:

Note for IAR 8 users:
(Libraries for IAR 8 require wchar_t to be of size 32 bits while IAR 7 requires 16 bits).

To run a project using IAR 8, follow these intructions:
- Open the IAR project in IAR 8. The IAR workbench will automatically generate an IAR 8 compatible project file.
- If the project contains one of the precompiled libraries listed below, replace it with the IAR 8 compatible alternative
(there are no projects targeting nRF51 in this SDK).
- Save the project.
- When building the project, you might get the warning: "The header file 'cmsis_iar.h' is obsolete and should not be used. [...]".
- The problem is described in DevZone post: devzone.nordicsemi.com/.../iar-ewarm-8-22-1-complains-about-cmsis_iar-h
The solution is to remove all occurrences of #include <cmsis_iar.h>.

The affected libraries are:
- micro-ecc crypto:
- IAR7: Includes library located in the folder named “…_iar\…”.
- IAR8: Switch to using the library from the folder named “…_armgcc\…”.
- nrf_cc310, nrf_cc310_bl, and nrf_oberon:
- IAR7: Link to a library where “short_wchar” is part of the folder name.
- IAR8: Link to a library without “short_wchar” in part of the folder name.
- Gazell, NFC Tag, and 802.15.4:
- IAR7: Includes the library where the file name ends with “_iar”.
- IAR8: Switch to using the library with similar file name that ends with “_gcc”.
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