Neither of those articles said that the US sold WMDs to Iraq
The first one said The Washington Post (in an article in Dec.1986 by Bob Woodward) reported that in 1984 the CIA began secretly giving information to Iraqi intelligence to help them "calibrate" poison gas attacks against Iranian troops.
The second one said, The CIA established direct intelligence links with Baghdad, and began giving Iraq "data from sensitive US satellite reconnaissance photography" to help in the war.
In both cases, that intelligence was targeting info, not WMD technology. Read your own link, for Christ's sake (if you can).
Now, here's a history question for you. What was going on in Iraq in the early to mid 1980s that would cause the US to want to help Iraq?