Error "relocation R_X86_64_32S against `.rodata'" occured while linking to gcc library

[Ian Lance Taylor]

陳韋任 <chenwj@iis.sinica.edu.tw> writes:

>   I am trying to use a gcc plugin, gcc-vcg-plugin
> (http://code.google.com/p/gcc-vcg-plugin/), but I
> have a problem with building the plugin.
>
>   Error messgae belows,
>
> -------------------------------------------------------------------------------
> /usr/bin/ld: /tmp/chenwj/install/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/../../../../lib64/libiberty.a(hashtab.o):
> relocation R_X86_64_32S against `.rodata' can not be used when making a shared object; recompile with -fPIC
> /tmp/chenwj/install/lib/gcc/x86_64-unknown-linux-gnu/4.6.0/../../../../lib64/libiberty.a: could not read symbols: Bad value
> collect2: ld returned 1 exit status

You need to use a version of libiberty compiled with -fPIC.  This can
normally be found in the working directory libiberty/pic.  Link your
plugin with libiberty/pic/libiberty.a rather than libiberty/libiberty.a.

An alternative is to observe that libiberty is pretty much all linked
into cc1 anyhow, so you don't really need to link your plugin against
it.

Ian