On Wed, Dec 21, 2016 at 08:08:45PM +0800, Po-Hsu Lin wrote: > Hello, > > I found this compilation issue on an Ubuntu Yakkety (kernel 4.8.0-30) > x86_64 system. > > When running "make" till the following step: > gcc -mno-red-zone -m64 -O1 -g -MMD -MF x86/.vmexit.d -Wall -Werror > -fno-omit-frame-pointer -Wno-frame-address -nostdlib -o > x86/vmexit.elf -Wl,-T,x86/flat.lds x86/vmexit.o x86/cstart64.o > lib/libcflat.a /usr/lib/gcc/x86_64-linux-gnu/6/libgcc.a > > It will return: > /usr/bin/ld: x86/cstart64.o: relocation R_X86_64_32 against `.data' > can not be used when making a shared object; recompile with -fPIC > > This issue won't go away even with x86/cstart64.o recompiled with the > -fPIC flag: > gcc -fPIC -mno-red-zone -m64 -O1 -g -MMD -MF x86/.cstart64.d -Wall > -Werror -fno-omit-frame-pointer -Wno-frame-address -std=gnu99 > -ffreestanding -I lib -I lib/x86 -c -nostdlib -o x86/cstart64.o > x86/cstart64.S > > The head of the kvm-unit-test repository is 1bde9127da4c > > I think maybe it's because the source is assembly code, making the > -fPIC flag useless for it? > > System spec > - CPU: Intel i3-4010U > - Kernel version: 4.8.0-30-generic #32 > - GCC version: gcc (Ubuntu 6.2.0-5ubuntu12) 6.2.0 20161005 > > Compilation works fine with Ubuntu Xenial (4.4 kernel, gcc Ubuntu > 5.4.0-6ubuntu1~16.04.4 5.4.0 20160609), even with 4.8 kernel on > Xenial, so I think this is more related to the compiler or something. > Does adding '-fno-pic' help? Thanks, drew -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
