On Mon, 2022-03-28 at 16:43 -0500, Ron Olson wrote: > Hey all- > I’m unable to build Swift on Fedora 36 and Rawhide while it does > build on F35. I’ve been able to condense the entire issue down to the > following sample code that demonstrates the problem: > nothing.S: > #define ASM_TYPE_FUNCTION(symbol) .type symbol, %function > #define ASM_SIZE(symbol) .size symbol, .-symbol > #define ASM_SYMBOL(symbol) symbol > #define ASM_WRAPPER_NAME(symbol) _interceptor##symbol > .comm _ZN14__interception10real_vforkE,8,8 > .globl ASM_WRAPPER_NAME(vfork) > ASM_TYPE_FUNCTION(ASM_WRAPPER_NAME(vfork)) > ASM_WRAPPER_NAME(vfork): > // Commenting out the line below makes it work > call *_ZN14__interception10real_vforkE(%rip) > ASM_SIZE(vfork) > And compiling this code with: > clang++ -fPIC -shared ./nothing.S > Results in the error: > /usr/bin/ld: /tmp/fun-1b3a0d.o: warning: relocation against > _ZN14__interception10real_vforkE' in read-only section .text' > /usr/bin/ld: /tmp/fun-1b3a0d.o: relocation R_X86_64_PC32 against > symbol `_ZN14__interception10real_vforkE' can not be used when making > a shared object; recompile with -fPIC > /usr/bin/ld: final link failed: bad value
https://bugzilla.redhat.com/show_bug.cgi?id=1304277#c3 "relocation R_X86_64_PC32 against undefined symbol" happens when LDFLAGS are set with hardening and CFLAGS not . maybe is an effect of https://fedoraproject.org/wiki/Changes/SetBuildFlagsBuildCheck have you tried %undefine _auto_set_build_flags ? > The issue is that I’m explicitly passing -fPIC but it seems to either > be ignored or overridden somehow. I’m not well versed on assembly to > make any kind of educated guess about what might be the > problem/solution so I’m hoping someone more familiar might be able to > shed some light on the issue. > Thanks! > Ron > _______________________________________________ > devel mailing list -- devel@lists.fedoraproject.org > To unsubscribe send an email to devel-le...@lists.fedoraproject.org > 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@lists.fedoraproject.org > Do not reply to spam on the list, report it: > https://pagure.io/fedora-infrastructure -- Sérgio M. B.
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