cotire 1.6.1
cotire 1.6.2
cotire 1.6.3
Check if variable is set before adding to list
Use (public) interface link libraries
Merge pull request #29 from gjasny/check-for-empty-variable

Check for empty variable
Preserve system flag for includes when generating PCH

If the compiler understands system include paths it exposes the
necessary flag within the CMAKE_INCLUDE_SYSTEM_FLAG_${LANG}
variable.

System include paths for targets could be queried via the target
property INTERFACE_SYSTEM_INCLUDE_DIRECTORIES. Here the system
include paths are listed in addition of being available in
the INTERFACE_INCLUDE_DIRECTORIES property.

Note: Currently there is no way to query the SYSTEM flag for
directory include properties.
Merge pull request #30 from gjasny/handle-system-includes

Preserve system flag for includes when generating PCH
cotire 1.6.4
Check for empty architectures before setting -arch flag.
Merge pull request #34 from smspillaz/fix_33

Check for empty architectures before setting -arch flag.
Update a link to problems with unity builds

Lee Winder have moved hist blog to the new place, old link doesn't work now, but I believe I have found the correct one
Merge pull request #35 from dpantele/patch-1

Update a link to problems with unity builds
Fix `-isystem` includes being incorrectly passed to execute_process()

The external command was being invoked with arguments: ["clang", ...,
"-isystem  /foo/bar/baz", ...], which meant that the compiler treated
the whitespace between the flag and the path as being part of the path
itself. (i.e. it was looking for "  /foo/bar/baz").

Fixed by passing the argument to execute_process() as
'-isystem/foo/bar/baz'; I also needed to ensure we normalized the value
of CMAKE_INCLUDE_SYSTEM_FLAG_<LANG>, which itself contains trailing
whitespace in some cases.
Merge pull request #36 from nickhutchinson/master

Fix `-isystem` includes being incorrectly passed to execute_process()
cotire 1.6.5
cotire 1.6.6
add link to blog
cotire 1.6.7
cotire 1.6.8