On 10/10/2015 01:25 PM, Neal Gompa wrote:
Hello all,

Over the last few weeks, I've been working on a number of packages that use
CMake for the build system for various distros, and I've noticed something
rather peculiar. Of all the distros I've built packages for (Fedora/CentOS,
openSUSE, Mageia, Debian, and Ubuntu), only Fedora/CentOS does not
automatically do CMake building in a subdirectory such that the build
artifacts don't mix in with the source tree. Essentially, the %cmake macro
doesn't enforce builds are out-of-tree.

Is there a particular reason for this?

One that comes to mind is that you might want to build different flavors of the same sources, one prominent example being parallellizable programs that can be compiled either into sequential binaries or binaries that can be run in parallel.

As has already been pointed out by many people on this list, it is simple to do an out-of-root build in the spec file even though it is not done by default.
--
Susi Lehtola
Fedora Project Contributor
jussileht...@fedoraproject.org
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