From mboxrd@z Thu Jan  1 00:00:00 1970
From: Richard Henderson <rth@twiddle.net>
Subject: Re: [Bug 1257099] [NEW] QEMU fails to build on CentOS
 5.10 with relocation R_X86_64_PC32 error
Date: Fri, 06 Dec 2013 10:24:59 +1300
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To: Paolo Bonzini <pbonzini@redhat.com>, Don Slutz <dslutz@verizon.com>
Cc: qemu-devel@nongnu.org, xen-devel@lists.xensource.com, 1257099@bugs.launchpad.net, Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Ian Campbell <Ian.Campbell@citrix.com>
List-Id: xen-devel@lists.xenproject.org

On 12/06/2013 04:18 AM, Paolo Bonzini wrote:
> $ gcc -shared -o f.so f.c -fPIE -fPIC
> /usr/bin/ld: /tmp/ccQc9els.o: relocation R_X86_64_PC32 against `f' can not be used when making a shared object; recompile with -fPIC
> /usr/bin/ld: final link failed: Bad value
> collect2: ld returned 1 exit status
> 
> 
> The bug is simply that "-fPIE -fPIC" counts as -fPIE rather than -fPIC:
> 
> $ gcc -S -o - f.c -fPIE |grep call
> 	call	f                      # PC32 relocation
> $ gcc -S -o - f.c -fPIC |grep call
> 	call	f@PLT                  # PLT32 relocation

The easy workaround is to drop -fPIE when we're adding -fPIC.


r~