[Bug 1894453] [NEW] Building Ceph packages with RelWithDebInfo

[Ponnuvel Palaniyappan]

Public bug reported:

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

** Affects: ceph (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1894453

Title:
  Building Ceph packages with RelWithDebInfo

Status in ceph package in Ubuntu:
  New

Bug description:
  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

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