<html><head><title></title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/></head><body><div style="position: relative; color: #000000; font: 12px Arial,Helvetica,sans-serif;">> And I use both gcc and clang with command “<span class="" style="font-size: 14px;"><span style="color: #0061ff;">cc -g -Wall -I../../include -lcrypto aesgcm.c</span></span>" to compile the source code.</div>
<div style="position: relative; color: #000000; font: 12px Arial,Helvetica,sans-serif;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">Long version:</span></div>
<div style="position: relative; color: #000000; font: 12px Arial,Helvetica,sans-serif;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">Note that the linker processes its libraries from left to right, e.g. if you have an object file object.o and to libraries</span></div>
<div style="position: relative; color: #000000; font: 12px Arial,Helvetica,sans-serif;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">liba.a and libb.a, then "cc object.o -la -lb" will first collect all unresolved symbols in the object files, then it will</span></span></div>
<div style="position: relative; color: #000000; font: 12px Arial,Helvetica,sans-serif;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">resolve whatever it can resolve with the files in liba.a, possibly adding new unresolved symbols and finally it</span></span></span></div>
<div style="position: relative; color: #000000; font: 12px Arial,Helvetica,sans-serif;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">will try to resolve the remaining symbols with libb.a. If you do "cc object.o -lb -la", it will again start with the</span></span></span></span></div>
<div style="position: relative; color: #000000; font: 12px Arial,Helvetica,sans-serif;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">symbols from object.o, resolve what it can against libb.a, then resolve the reamaining stuff against liba.a and</span></span></span></span></span></div>
<div style="position: relative; color: #000000; font: 12px Arial,Helvetica,sans-serif;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">if it adds any symbol from liba.a that needs something from libb.a you get an error.</span></span></span></span></span></span></div>
<div style="position: relative; color: #000000; font: 12px Arial,Helvetica,sans-serif;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">If you do "cc -lb -la object.o", it will start with no symbols, add whatever it needs to resolve the symbols from</span></span></span></span></span></span></span></div>
<div style="position: relative; color: #000000; font: 12px Arial,Helvetica,sans-serif;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">libb.a (i.e. nothing), then adds whatever it needs from liba.a (i.e. nothing), then add object.o and complain</span></span></span></span></span></span></span></span></div>
<div style="position: relative; color: #000000; font: 12px Arial,Helvetica,sans-serif;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">about everything that remains unresolved.</span></span></span></span></span></span></span></span></span></div>
<div style="position: relative; color: #000000; font: 12px Arial,Helvetica,sans-serif;"> </div>
<div style="position: relative; color: #000000; font: 12px Arial,Helvetica,sans-serif;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none">In short: try "cc ... aesgcm.c -lcrypto", that should work.</span></span></span></span></span></span></span></span></span></span></span></div>
<div style="position: relative; color: #000000; font: 12px Arial,Helvetica,sans-serif;"> </div>
<div style="position: relative; color: #000000; font: 12px Arial,Helvetica,sans-serif;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"> Regards,</span></span></span></span></span></span></span></span></span></span></span></span></span></div>
<div style="position: relative; color: #000000; font: 12px Arial,Helvetica,sans-serif;"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"><span style="font-family:arial,helvetica,sans-serif;font-size:10pt;color:#000000;text-decoration:none"> Stefan</span></span></span></span></span></span></span></span></span></span></span></span></span></span></div></body></html>