Messages in this thread | | | From | "H.J. Lu" <> | Date | Fri, 24 Jan 2020 10:39:11 -0800 | Subject | Re: [PATCH] x86: Don't clare __force_order in kaslr_64.c |
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On Fri, Jan 24, 2020 at 10:24 AM Andy Lutomirski <luto@amacapital.net> wrote: > > > > > On Jan 24, 2020, at 10:18 AM, H.J. Lu <hjl.tools@gmail.com> wrote: > > > > GCC 10 changed the default to -fno-common, which leads to > > > > LD arch/x86/boot/compressed/vmlinux > > ld: arch/x86/boot/compressed/pgtable_64.o:(.bss+0x0): multiple definition of `__force_order'; arch/x86/boot/compressed/kaslr_64.o:(.bss+0x0): first defined here > > make[2]: *** [arch/x86/boot/compressed/Makefile:119: arch/x86/boot/compressed/vmlinux] Error 1 > > > > Since __force_order is already provided in pgtable_64.c, there is no > > need to declare __force_order in kaslr_64.c. > > Why does anything actually define that variable? Surely any actual references are just an outright bug. Is it needed for LTO?
It is needed by GCC 10 without LTO.
-- H.J.
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