Gordon Messmer wrote: > If a maintainer enabled the _elf_require_fallback_versions macro > before a mass rebuild where the _elf_provide_fallback_versions macro > had been enabled globally, then the resulting package would have > versioned dependencies, and the packages it depends on might not have > versioned dependencies. That package wouldn't be installable. It seems to me that it would be much safer if the dependency generator would verify that the library package actually provides the generated dependency. If _elf_provide_fallback_versions is turned off in a single package for whatever reason, then dependent packages should only need rebuilding to pick up the unversioned dependency. The maintainers of the dependent packages shouldn't have to turn off _elf_require_fallback_versions manually. There are always some failures in each mass rebuild. If library L fails to build in Fedora N, and fails again in Fedora N+1, then under the current policy, L will be retired from Fedora N+2. If you turn on _elf_provide_fallback_versions in Fedora N, and then turn on _elf_require_fallback_versions in Fedora N+1, then any packages that use L will become uninstallable in Fedora N+1, half a year before L will be retired. Therefore, if you're going to rely on the FTBFS retirement process to ensure that all libraries provide version numbers, then you shouldn't turn on _elf_require_fallback_versions before Fedora N+2. Once the dependency generator has found the filename it gets the version number from, it would be easy to run rpm --query --provides --file <filename> | grep --quiet ^<dependency>$ except that people keep saying that package builds shouldn't invoke RPM for some reason. Is there a way to do the above without actually invoking RPM? Björn Persson
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