-If you have pthreads library installed, but have a gtk version
-which does not yet support threading, you need to explicitly
-disable threading by using the option --disable-threads.
-
-Note that configure assumes your flex will generate files named
-"lexyy.c", not "lex.yy.c". If you have a version which does
-generate "lex.yy.c", you need to manually change the generated
-makefile.
+Open an OS/2 prompt and switch to the directory above.
+Set MAKESHELL (and depending on your installation also INSTALL, for me
+it tends to try to use the system's tcpip\pcomos\install.exe which causes
+problems...) to a Unix like shell, e.g.
+SET MAKESHELL=ash
+
+Be warned that depending on the precise version of your make, the
+variable that needs to be set might be MAKE_SHELL instead of MAKESHELL.
+If you have a really deficient version of GNU make, it might even be
+necessary to set SHELL or even COMSPEC to a unix like shell as well.
+
+Notice that the delivered configure scripts are fully OS/2 aware, so you
+can simply run
+ ash -c "configure --with-gtk"
+and make and possibly make install as described above.