/nordic/nordic-blog/b/blog/posts/nordic-nrf51822-arm-cortex-m0-development-using-emNordic nRF51822 ARM Cortex-M0 Development using emIDE To avoid the hefty charges with commercial compilers I tried emIDE with some success; here are the settings I used for the EV Kit Official emIDE website: http://www.emide.org/ Ev Kit: https://wen-USTelligent Community 13https://devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/nordic-nrf51822-arm-cortex-m0-development-using-emMon, 17 Nov 2014 17:10:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:de67a451-909a-490a-ab10-77a9a66e5ee4lachezar0<p>I think you need to use -std=gnu99 (3rd section) to make the compilation of &quot;system_nrf51.c&quot; to work, because one of its dependencies (compiler_abstraction.h) uses asm keyword, which is not defined in c99.</p> <p>I tried to make the blinky example to compile in emIDE and changing it to gnu99 fixed the compilation error I had.</p> <img src="https://devzone.nordicsemi.com/aggbug?PostID=760&AppID=4&AppType=Weblog&ContentType=0" width="1" height="1">