This process was sometimes called linkage editing and the output known as a load module. A compiler works with what are sometimes called 3GL and higher-level languages. An assembler works on programs written using a processor's assembler language.
In general, however, when between vowels (as in exactamente) the Spanish x is pronounced like the English ks sound but softer or less explosive. When it comes before another consonant (as in expediciÃ³n), it has the s sound in some regions/countries but the soft ks sound in others.
Note that Roman transliteration of Maya consonants follows 16th century Spanish orthography. This means that the letter j is pronounced like a rough /h/. The letter x represents the sound /&\#x0161;/ (like the sh in ship). And the combination tz is the sound /ts/ like in catsup.