(msvc) avoid LNK1169 errors

[Jarosław Staniek]

Hello,
Could it be sane to globally add the following setting?

if(MSVC)
   # avoid LNK1169 errors
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /FORCE:MULTIPLE")
endif(MSVC)

This removed linker error when operators with templates are defined many times 
in various libs. [1]


[1] http://msdn2.microsoft.com/en-us/library/xttf5w7w(VS.80).aspx

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regards / pozdrawiam, Jaroslaw Staniek
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