* David Malcolm: > What would it do to distro-wide performance if > -fno-semantic-interposition > were added to the default rpm build flags, (and glibc added -fsemantic- > interposition to override this)? glibc already does the equivalent of -fno-semantic-interposition manually. We even have a test case that only certain select symbols are exempted (mostly malloc). But you cannot interpose the open function and expect that it will alter the behavior of fopen, or anything else that calls fopen under the covers. This kind of internal interposition is also inhibited by -fno-semantic-interposition in combination with LTO and controls on symbol visibility within the linker. I'm sure there have been previous discussions about -Bsymbolic, which does something similar at the linker/dynamic loader level. I wouldn't want Fedora to switch the default here, the toolchain default should change first, for cross-distribution consistency. Thanks, Florian _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
