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.
The Spanish h also was used to separate two vowels that weren't pronounced as one, that is as a diphthong. For example, the word for owl used to be spelled as buho to indicate that it was pronounced as two syllables rather than rhyming with the first syllable of cuota or quota..ust as the k in the English know and the b in lamb used to be audible, the Spanish h used to be pronounced ages ago. Almost all Spanish consonants have become softer over the years; the h became so soft as to become inaudible.