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Re: PATCH: Put libunwind.a in libgcc_s.so: versioning of _Unwind_*() symbols
On Tue, Apr 20, 2004 at 11:38:36PM -0700, Jim Wilson wrote:
> On Tue, 2004-04-20 at 22:57, H. J. Lu wrote:
> > This patch puts libunwind.a in libgcc_s.so.1. The test result is at
> > We can do it on ia64 since PIC is default on ia64.
>
> IA-64 code is PIC by default. However, it is not true that static
> library code and shared library code are the same. There are
> differences because of the IA-64 ABI, for instance, the rules that say
> "own" data can be put in the small data section, but what qualifies as
> "own" data is different for shared libraries and static libraries. This
> stuff is controlled by the -fpic option. You must use -fpic for all
> code that goes into a shared library. Note: -fpic has always meant
> compile this code for shared libraries, this is even true on systems
> like IA-64 where code is PIC by default. There is no guarantee that
> code in libunwind.a was compiled with -fpic. I don't see how this can
> work.
We can always require to compile the static libunwind library with
-fpic.
H.J.