Remove __DW_DESKTOP__ and rename __DW_MOBILE__ to DW_MOBILE. After thinking about it, __DW means an internal define, which is not how DW_MOBILE is meant to be used. DW_DESKTOP is already in use, so we will just use DW_MOBILE to identify mobile platforms, if it isn't set it is a desktop applicatiob platform.

prefix=@prefix@
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${exec_prefix}/include
 
Name: dwindows
Description: Dynamic Windows Cross platform UI Toolkit
Version: @VERSION@
Libs: -L${prefix}/lib -ldwindows @LIBS@
Cflags: -I${prefix}/include @CFLAGS@ -D@DW_DEFINE@