Change Details

Raise the minimum versions of Pacemaker's dependencies at each minor or major series bump, aiming for versions that are available as stock packages in long-term support releases (typically 5 to 7 years old) of supported distributions. Bumping a dependency generally involves editing configure.ac and INSTALL.md; bumps are useful only if we can remove workarounds/conditionals for older versions or take advantage of newer features. Important distributions: - RHEL: currently support 7 >=7.2, 8, 9, and later - Fedora - SLES/OpenSUSE - [[ http://archive.debian.org/debian/dists/ | Debian ]]: currently support 8 "jessie" (2015), 9 "stretch" (2017), 10 "buster" (2019), 11 "bullseye" (2021), and later - [[ https://packages.ubuntu.com/ | Ubuntu ]]: currently support 14 "trusty"/"utopic" (2014), 15 "vivid"/"wily" (2015), 16 "xenial"/"yaketty" (2016-2020), and later - FreeBSD (only supported as far as passing CI testing) Key dependencies: - Python (currently 3.4): stretch and xenial have 3.5, RHEL 7 and 8 have 3.6; 3.5 (2015-09-13) would let us use subprocess.run(), os.scandir(), async programming syntax - autoconf (currently 2.64): trusty, xenial, RHEL 7/8 have 2.69; 2.70 (2020-12-08) supports --runstatedir and C_CONFIG_MACRO_DIRS(), and would let us deprecate/drop --with-runstatedir and drop AC_PROG_CC_STDC - glib (currently 2.42.0): see https://github.com/GNOME/glib/blob/master/NEWS and https://en.wikipedia.org/wiki/GLib#Releases ; xenial has 2.48 - libqb (currently 0.17): jessie is broken (libqb 0.11, no pacemaker), trusty has 0.16, xenial and RHEL 7.[12] have 0.17; 2.0.0 (2020-05) or 2.0.2 (2020-10) (see configure.ac, plus can deprecate CRM_TRACE_INIT_DATA() and drop calls) - pkg-config (currently 0.27): RHEL 7 has 0.27, jessie 0.28, xenial 0.29; note that F26+/RHEL8+ use pkgconf instead, which has different versioning; 0.28 (2013-01-24) has PKG_CHECK_VAR (we could drop our replacement) - libxml2 (currently no minimum): 2.9.2 (2014-10-16, not available until RHEL 8 and stretch) would let us drop the cast in crm_element_value() - gettext (currently 0.18): RHEL 7.2 has 0.18.2.1, RHEL 8.0 has 0.19.8.1, jessie has 0.19.3, vivid has 0.19.2 - corosync (currently 2.0.0): 3.1.3 would let us drop HAVE_COROSYNC_CFG_TRACKSTART and add a call to corosync_cfg_trackstop() (see comment in close_cfg()) (Leave this task open-ended; create a new task to bump dependencies to specific versions for a particular Pacemaker release.)

Raise the minimum versions of Pacemaker's dependencies at each minor or major series bump, aiming for versions that are available as stock packages in supported distributions' long-term support releases (typically 5 to 7 years old). Bumping a dependency generally involves editing configure.ac and INSTALL.md; bumps are useful only if we can remove workarounds/conditionals for older versions or take advantage of newer features. Important distributions: - RHEL: currently support 7 >=7.2, 8, 9, and later - Fedora - SLES/OpenSUSE - [[ http://archive.debian.org/debian/dists/ | Debian ]]: currently support 8 "jessie" (2015), 9 "stretch" (2017), 10 "buster" (2019), 11 "bullseye" (2021), and later - [[ https://packages.ubuntu.com/ | Ubuntu ]]: currently support 14 "trusty"/"utopic" (2014), 15 "vivid"/"wily" (2015), 16 "xenial"/"yaketty" (2016-2020), and later - FreeBSD (only supported as far as passing CI testing) Key dependencies: - **Python (currently 3.4):** stretch and xenial have 3.5, RHEL 7 and 8 have 3.6; 3.5 (2015-09-13) would let us use subprocess.run(), os.scandir(), async programming syntax - **autoconf (currently 2.64): **trusty, xenial, RHEL 7/8 have 2.69; 2.70 (2020-12-08) supports --runstatedir and C_CONFIG_MACRO_DIRS(), and would let us deprecate/drop --with-runstatedir and drop AC_PROG_CC_STDC - **glib (currently 2.42.0): **see https://github.com/GNOME/glib/blob/master/NEWS and https://en.wikipedia.org/wiki/GLib#Releases ; xenial has 2.48 - **libqb (currently 0.17):** jessie is broken (libqb 0.11 and no pacemaker, but we support building from source with newer libqb), trusty has 0.16, xenial and RHEL 7.[12] have 0.17; 2.0.0 (2020-05) or 2.0.2 (2020-10) (see configure.ac, plus can deprecate CRM_TRACE_INIT_DATA() and drop calls) - **pkg-config (currently 0.27): **RHEL 7 has 0.27, jessie 0.28, xenial 0.29; note that F26+/RHEL8+ use pkgconf instead, which has different versioning; 0.28 (2013-01-24) has PKG_CHECK_VAR (we could drop our replacement) - **libxml2 (currently no minimum):** 2.9.2 (2014-10-16, not available until RHEL 8 and stretch) would let us drop the cast in crm_element_value() - **gettext (currently 0.18):** RHEL 7.2 has 0.18.2.1, RHEL 8.0 has 0.19.8.1, jessie has 0.19.3, vivid has 0.19.2 - **corosync (currently 2.0.0):** 3.1.3 would let us drop HAVE_COROSYNC_CFG_TRACKSTART and add a call to corosync_cfg_trackstop() (see comment in close_cfg()) (Leave this task open-ended; create a new task to bump dependencies to specific versions for a particular Pacemaker release.)

Raise the minimum versions of Pacemaker's dependencies at each minor or major series bump, aiming for versions that are available as stock packages in supported distributions' long-term support releases (typically 5 to 7 years old) of supported distributions. Bumping a dependency generally involves editing configure.ac and INSTALL.md; bumps are useful only if we can remove workarounds/conditionals for older versions or take advantage of newer features. Important distributions: - RHEL: currently support 7 >=7.2, 8, 9, and later - Fedora - SLES/OpenSUSE - [[ http://archive.debian.org/debian/dists/ | Debian ]]: currently support 8 "jessie" (2015), 9 "stretch" (2017), 10 "buster" (2019), 11 "bullseye" (2021), and later - [[ https://packages.ubuntu.com/ | Ubuntu ]]: currently support 14 "trusty"/"utopic" (2014), 15 "vivid"/"wily" (2015), 16 "xenial"/"yaketty" (2016-2020), and later - FreeBSD (only supported as far as passing CI testing) Key dependencies: - - **Python (currently 3.4):** stretch and xenial have 3.5, RHEL 7 and 8 have 3.6; 3.5 (2015-09-13) would let us use subprocess.run(), os.scandir(), async programming syntax - - **autoconf (currently 2.64): **trusty, xenial, RHEL 7/8 have 2.69; 2.70 (2020-12-08) supports --runstatedir and C_CONFIG_MACRO_DIRS(), and would let us deprecate/drop --with-runstatedir and drop AC_PROG_CC_STDC - **glib (currently 2.42.0): **see https://github.com/GNOME/glib/blob/master/NEWS and https://en.wikipedia.org/wiki/GLib#Releases ; xenial has 2.48 - - **libqb (currently 0.17):** jessie is broken (libqb 0.11 and no pacemaker, no pacemakerbut we support building from source with newer libqb), trusty has 0.16, xenial and RHEL 7.[12] have 0.17; 2.0.0 (2020-05) or 2.0.2 (2020-10) (see configure.ac, plus can deprecate CRM_TRACE_INIT_DATA() and drop calls) - - **pkg-config (currently 0.27): **RHEL 7 has 0.27, jessie 0.28, xenial 0.29; note that F26+/RHEL8+ use pkgconf instead, which has different versioning; 0.28 (2013-01-24) has PKG_CHECK_VAR (we could drop our replacement) - - **libxml2 (currently no minimum): 2** 2.9.2 (2014-10-16, not available until RHEL 8 and stretch) would let us drop the cast in crm_element_value() - - **gettext (currently 0.18):** RHEL 7.2 has 0.18.2.1, RHEL 8.0 has 0.19.8.1, jessie has 0.19.3, vivid has 0.19.2 - **corosync (currently 2.0.0):** 3.1.3 would let us drop HAVE_COROSYNC_CFG_TRACKSTART and add a call to corosync_cfg_trackstop() (see comment in close_cfg()) (Leave this task open-ended; create a new task to bump dependencies to specific versions for a particular Pacemaker release.)