-Open an OS/2 prompt and switch to the directory above.
-First set some global environment variables we need:
+You'll need OS/2 Warp (4.51) or eCS(1.0), X-Free86/2 (3.3.6 or newer),
+emx (0.9d fix 4), flex (2.5.4), yacc (1.8) or bison (1.25),
+a Unix like shell (pdksh-5.2.14 or ash), Autoconf (2.57), GNU file
+utilities (3.13), GNU text utilities (1.19), GNU shell utilites (1.12),
+m4 (1.4), sed (2.05), grep (2.0), Awk (3.0.3), GNU Make (3.75).
+
+Preferably, you should have Posix/2 installed and C(PLUS)_INCLUDE_PATH and
+LIBRARY_PATH set up accordingly, however, wxGTK will even work without it.
+Presence of Posix/2 will be auto-detected.