Created attachment 527556 [details] [diff] [review]
It's generated by xpcom/stub/Makefile.in that uses $(LIB_PREFIX) to generate library name list resulting in eg. libxul.dll instead of xul.dll. It should use $(DLL_PREFIX) that is the same as LIB_PREFIX on all configs except mingw. The attached patch fixes the problem and should be no-op on other platforms.
Thanks for review.