https://devzone.nordicsemi.com/f/nordic-q-a/818/missing-symbols-when-linkingHi all, I&#39;m having problems when linking my code intended for use on the nRF51822. For some reason there are missing symbols that are needed. I&#39;ve traced the dependencies back to the linker script file &quot;gcc_nrf51_common.ld&quot;. Where are these definitionsen-USTelligent Community 13Mon, 04 Nov 2013 11:39:50 GMThttps://devzone.nordicsemi.com/thread/4064?ContentTypeID=1Mon, 04 Nov 2013 11:39:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e034d61c-3101-4c72-a00f-229056545bfaOle Morten<p>Based on your errors, it seems that you are mixing Makefiles and linker scripts from different versions of the SDK. A few versions ago we switched the officially supported GCC version from the CodeSourcery one to the one available <a href="https://launchpad.net/gcc-arm-embedded">here</a>, and the errors you see seems likely to occur if you mix files between them.</p> <p>I&#39;d recommend you to make sure to upgrade to the latest SDK, use the Launchpad toolchain, and write your Makefile again, based on one from the latest SDK.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/4063?ContentTypeID=1Sat, 02 Nov 2013 17:07:10 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fbd3c22f-42a0-4fe9-9776-15a3e8bf6a75Ingolf Petersen<p>So it seems that the vector table and reset handlers aren&#39;t being defined. But they should be. I&#39;ve used the same makefile before with the same directory structure without any hiccups so this seems really strange.</p><div style="clear:both;"></div>