Actually, I'm not concerned that much about Pelles C's support of envp, because I use mingw gcc along with Pelles.
I only mentioned it for the shake of completeness, regarding main(), because it's quite common on most c-platforms, or at least on the most popular among them.
PS. What kinda bothers me though, is the fact that I cannot close poIDE tabs by double-clicking on them (this I will officially file it as a feature request, but I have to search that it is not already filed).