Comment 0 for bug 1894453

This is to consider/discuss the possibility of whether the Ceph packages (UCA) should be built with RelWithDebInfo build option (CMAKE_BUILD_TYPE [0]) which can be supplied to the build script do_cmake.sh [1].

Currently, Upstream as well as UCA builds default to 'Debug' [0] builds. But is any reason why shouldn't go for RelWithDebInfo (i.e. "Release with Debug information")?

There's one issue noted with RelWithDebInfo which has a workaround too [2].

In general, gcc's -O2 [3] build should generate better code as well as there's a specific case for Ceph [4] that it improves performance.

[0] https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html

[1] https://github.com/ceph/ceph/blob/master/do_cmake.sh

[2] https://docs.ceph.com/docs/master/dev/perf/#common-issues

[3] https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html

[4] https://bugs.gentoo.org/show_bug.cgi?id=733316