Just replace in Makefile line 6:
CFLAGS=-Wall
('-ansi -pedantic' removed)
It's not needed to be ansi conform. Otherwise you would need to move all declarations at the beginning of a function and replace all comments '// ...' with '/* ... */'. And maybe more.
Another thing:
It seems nobody noticed it. I changed the Blender export script to run glexemel directly after generating the XML file.
http://http://glest.org/glest_board/viewtopic.php?f=4&t=3916&start=15#p19453(MSYS is about the shell script from titi, not needed for export script)
Could someone please try it. I don't know anything about Blender. So, i'm not able to test it myself (just exported a simple mesh under Linux, no texture, no animation).
It should also work on Windows.