Broken libcc1 lookup in GDB/Ubuntu

[Ruslan Kabatsayev]

Hi,

On Wed, 24 Mar 2021 at 18:15, Luis Machado via Gdb <gdb@sourceware.org> wrote:
>
> Hi,
>
> While looking at enabling the compile tests in GDB's testsuite, I
> noticed GDB doesn't find the right shared library because it is looking
> for a different naming pattern.
>
> In the case of Ubuntu 18.04/20.04, the shared library is named like so:
>
> /usr/lib/aarch64-linux-gnu/libcc1.so.0.0.0
> /usr/lib/aarch64-linux-gnu/libcc1.so.0 -> libcc1.so.0.0.0

"apt-file search libcc1.so" shows me that e.g. gcc-9 package (and
other versions of gcc) provides the suffixless version. It's installed
as a symlink into /usr/lib/gcc/aarch64-linux-gnu/9/libcc1.so . Can it
not be found?

>
> But GDB is looking for libcc1.so in the following ways:
>
> #define GCC_C_FE_LIBCC libcc1.so
> #define GCC_CP_FE_LIBCC libcc1.so
>
> So, basically, the gdb.compile tests will never be exercised
> out-of-the-box, even if you install the libcc1 package. I had to add a
> symlink named "libcc1.so" to make GDB happy.
>
> Now, I noticed there was a proposed fix for this many years ago, in the
> following series:
>
> https://gcc.gnu.org/legacy-ml/gcc-patches/2015-04/msg01241.html
> https://gcc.gnu.org/legacy-ml/gcc-patches/2015-04/msg01242.html
> https://gcc.gnu.org/legacy-ml/gcc-patches/2015-04/msg01243.html
> https://gcc.gnu.org/legacy-ml/gcc-patches/2015-04/msg01244.html
> https://gcc.gnu.org/legacy-ml/gcc-patches/2015-04/msg01245.html
>
> Was this dropped for some reason? Or is this still valid and should be
> pursued upstream?
>
>
> Thanks,
> Luis

Regards,
Ruslan