Changelog for xprop-1.2.3-3.1.x86_64.rpm :

* Wed Apr 04 2018 sndirschAATTsuse.com- Update to version 1.2.3
* configure: Drop AM_MAINTAINER_MODE
* autogen.sh: Honor NOCONFIGURE=1
* Print which option was in error along with usage message
* Add -version option to print program version
* Free the thunks used by Show_Prop
* Free the data returned by XListProperties()
* Free the data returned by XGetWindowProperty()
* Free the data returned by Format_Icons()
* autogen.sh: use quoted string variables
* autogen: add default patch prefix
* autogen.sh: use exec instead of waiting for configure to finish
* Tue Aug 13 2013 zaitorAATTopensuse.org- Update to version 1.2.2: + Mark usage() as noreturn, as suggested by gcc - Wmissing-noreturn. + Fix const conversion warnings from gcc. + Add unicode argument to Format_Len_String to reduce code duplication. + Replace strlen/malloc/memcpy set with strdup. + Mark FatalError() as taking printf-style arguments. + config: Add missing AC_CONFIG_SRCDIR. + Enable setting property of type UTF8_STRING. + Expand description in README a little.
* Sat Apr 14 2012 dimstarAATTopensuse.org- Update to version 1.2.1: + Improves the man page. + Fixes issues found by static code analysis + Other cleanups to the code + Build system fixes.- Add pkgconfig(xproto) BuildRequires: New dependency.
* Fri Apr 13 2012 vuntzAATTopensuse.org- Split xprop from xorg-x11. Initial version: 1.2.0.