[cmake-developers] depend problem on windows

[Bill Hoffman]

So, I did a git branch switch to next and ran ninja on my build tree. 
It correctly re-ran cmake.  But I found a link error building cmake-gui:


CMakeLib.lib(cmLocalVisualStudio10Generator.cxx.obj) : error LNK2001: 
unresolved external symbol "public: virtual void __thiscall 
cmLocalVisualStudio7Generator::GetTargetObjectFileDirectories(class 
cmTarget *,class std::vector<class std::basic_string<char,struct 
std::char_traits<char>,class std::allocator<char> >,class 
std::allocator<class std::basic_string<char,struct 
std::char_traits<char>,class std::allocator<char> > > > &)" 
(?GetTargetObjectFileDirectories at cmLocalVisualStudio7Generator@@UAEXPAVcmTarget@@AAV?$vector at V?$basic_string at DU?$char_traits at D@std@@V?$allocator at D@2@@std@@V?$allocator at V?$basic_string at DU?$char_traits at D@std@@V?$allocator at D@2@@std@@@2@@std@@@Z)
bin\cmake-gui.exe : fatal error LNK1120: 1 unresolved externals
LINK Pass 1 failed. with 2


I did a ninja -t clean, and then ninja and everything worked.  So, it 
looks like some of the object files did not rebuild correctly after the 
branch switch.  Same source tree worked with a gmake build tree, so 
there were no odd file time things going on.

-Bill