On 28/11/2016 16:38, Paolo Bonzini wrote: > > > On 28/11/2016 16:24, Adrian Bunk wrote: >> On Mon, Nov 28, 2016 at 04:05:33PM +0100, Paolo Bonzini wrote: >>> >>> >>> On 27/11/2016 17:28, Adrian Bunk wrote: >>>> Building qemu fails in distributions where gcc enables PIE >>>> by default (e.g. Debian unstable) with: >>>> /usr/bin/ld: -r and -pie may not be used together >>>> >>>> -r and -pie cannot be used together in the linker, >>>> and position independent is already relocatable. >>>> >>>> Use -r instead of -Wl,-r to avoid gcc passing -r to the >>>> linker when PIE is enabled. >>>> >>>> Signed-off-by: Adrian Bunk <b...@stusta.de> >>> >>> I think this is a bug in the linker. If the linker is producing >>> relocatable objects by default, it has no reason to refuse -r. Have you >>> tried asking the binutils folks about it too? >> >> The linker knows nothing about this default, gcc is passing -pie >> to the linker. > > The linker is receiving "-r -pie". It can satisfy the requirement of > producing a relocatable object by discarding the "-r", but it doesn't. > That'd be a linker bug. > > But in fact ELF makes PIE ET_DYN and relocatable ET_REL. That would > make the linker error the right thing, but then I don't understand what > you mean by "position independent is already relocatable".
Aha, I looked at GCC source code and this is incorrect: "Use -r instead of -Wl,-r to avoid gcc passing -r to the linker when PIE is enabled". When GCC sees -r (as opposed to -Wl,-r) it does not pass -pie to the linker. Paolo
