File baselibs.conf of Package libXext
libXext6 provides "xorg-x11-libXext-<targettype> = 7.6_<version>" obsoletes "xorg-x11-libXext-<targettype> < 7.6_<version>" libXext-devel requires -libXext-<targettype> requires "libXext6-<targettype> = <version>" provides "xorg-x11-libXext-devel-<targettype> = 7.6_<version>" obsoletes "xorg-x11-libXext-devel-<targettype> < 7.6_<version>"