On 13.12.2013 10:43, Lars wrote:
Using the include_regular_expression macro made a huge difference. The
build time was reduced by more than 50%.
The regular expression appear to be only applied to part of
the dependency file path. So in the case of Boost this
works pretty well for us because we use #include
<boost/filesystem.hpp> but more difficult to remove qt
dependency like #include <QDir>. How do you view adding a feature
that allow applying regex to the absolute path? Secondly, the
documentation of include_regular_expression should probably
mention something about the target string (relative path, not absolute).
Maybe CMake could filter out includes in system directories (like gcc
-MM does).
System directories in this case could be directories added with e.g.
include_directories(SYSTEM).
Nils
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