[Cmake] CMakeLists.txt in ALL_BUILD

[Nitin Gupta]

Hi,
	I am wondering whether we may have toplevel CMakeLists.txt 
	as a part of sources in ALL_BUILD. Consider a case where 
	the top level CMakeLists.txt of a big project contains only 
	PROJECT and SUBDIR(dir1 dir2 ...) command. The dirs fruther 
	contain submodules. CMakeSetp.exe is run only once and it 
	configures	all the modules and submodules. Now there is 
	only only one .dsw generated, the one at the toplevel. Since 
	the toplevel CMakeLists.txt contain no targets it is not 
	dislayed in the source view anywhere.Hence to do modifications 
	at toplevel (say for addition of a new module) one has to edit 
	is seperatetly from outside of VC++.
	
	I suggest addition of CMakeLists.txt in ALL_BUILD too. Atleast 
	when there is no target in a CMakeLists.txt. I tried it by 
	commenting *return* from void cmLocalVisualStudio6Generator::
	AddDSPBuildRule when *dspname* is "ALL_BUILD". The top-lev 
	CMakeLists.txt shows up with ALL_BUILD. 
	
	Hope this does not break anything else! Thoughts?

Thanks and Best Regards,
Nitin