One more thing to keep in mind, is that CMake executables are heavily
used by the Makefiles during build time. CMake is used to compute depend
information. CMake is used to keep the files makefiles up to date with
the sources. Even if you did not want to auto-rerun CMake when a
CMakeLists.txt file changed, it is used for other things as well. It is
used to output in color and for cmake -E commands such as copy. So, the
generated makefiles are not really independent and the relative paths
would not remove any of the other dependencies I just mentioned.
Even with the IDE based files if you are using install rules, then the
CMake executable must be available on the machine doing the install.
CMake is also used as the program to do the install commands. So,
CMake is really required for a variety of reasons. However, the only
requirement for CMake is a C++ compiler. CMake itself bootstraps on any
unix platform. It can run from any directory (no root needed to
install). Binaries are provided for all major platforms as well. It is
in the grand scheme of things a very small dependency.
-Bill
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