IAR выпустил обновления библиотек, к версии 4.11a Опции

[IgorKossak]

EWAVR runtime library update 4.11A-2

Created: 2005-08-19 [ILOF]
1. Purpose
This update has been made to correct the following problem in the runtime libraries in version 4.11A:

EW17115: If the result of a floating point add or sub operation was 0 (zero), the SREG register including the I bit was incorrectly cleared. This caused problems related to interrupts.

2. Files included in the patch
File names are given relative to the root directory  \Program Files\IAR Systems\Embedded Workbench 4.0\
avr\lib\clib\cl*.r90
The IAR CLIB runtime library object modules
  version: 4.11A-2

avr\lib\dlib\dl*.r90
The IAR DLIB runtime library object modules
  version: 4.11A-2

3. Installing the patch

Extract the new files to avr\lib directory

Рекомендую скачать с прямых ссылок:
С библиотеки 44МБ;
С++ библиотеки 57МБ.