https://devzone.nordicsemi.com/f/nordic-q-a/34905/should-upgrade-the-gcc-from-4-9-2015-q3-to-6-2017-q2-updateHi Sir, In my system (windows 7), I had install the GCC 4 .9 2015 q3 for SDK 14.2.0/12.3.0. As reference the release note of SDK 15, the GCC upgrade to 6-2017-q2-update. Should I upgrade the GCC from 4.9 2015-q3 to 6-2017-q2-update for furtheren-USTelligent Community 13Fri, 01 Jun 2018 09:12:08 GMThttps://devzone.nordicsemi.com/thread/134306?ContentTypeID=1Fri, 01 Jun 2018 09:12:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:6a6d04ec-432b-46a5-ae85-fca856d17391Hsu<p>Hi Vidar,</p> <p></p> <p>OK, thanks for the update.</p> <p>BRs, Hanyu</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/134016?ContentTypeID=1Wed, 30 May 2018 11:54:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7d3f23d6-8f7b-43a4-8a6b-33e22ae14f97Vidar Berg<p>Hi,</p> <p>4.9 2015-q3 will probably work fine with SDK 15, but it has not been tested or verified by us, so would &nbsp;recommend to use the toolchain version specified in the release notes&nbsp;for the SDK version you&#39;re using.</p><div style="clear:both;"></div>