Kitware/CMake — pull request #32 by paroga (2013-02-01 22:04:59+00:00)
Title: Ninja: Avoid LNK1170 linker error 

link.exe has problems with very very long lines in rsp files too.
Use $in_newline instead of $in variable for rspcontent which
separates the arguments with a newline instead of a simple space
and was specially made for this purpose.