[PATCH] config/debuginfod.m4: Restore AC_CHECK_LIB check

[Aaron Merey]

On Mon, Jul 27, 2020 at 11:32 AM H.J. Lu <hjl.tools@gmail.com> wrote:
>
> On Sat, Jul 25, 2020 at 9:01 AM H.J. Lu <hjl.tools@gmail.com> wrote:
> > This caused:
> >
> > https://sourceware.org/bugzilla/show_bug.cgi?id=26301
> >
>
> It is quite normal to have debuginfod headers without libdebuginfod on
> multilib OSes.  Restore AC_CHECK_LIB to check if libdebuginfod exists.
> And always define HAVE_LIBDEBUGINFOD to 0 or 1 for
>
> binutils/dwarf.c:#if HAVE_LIBDEBUGINFOD
> binutils/dwarf.c:#if HAVE_LIBDEBUGINFOD
> binutils/dwarf.c:#if HAVE_LIBDEBUGINFOD
> binutils/dwarf.h:#if HAVE_LIBDEBUGINFOD
> binutils/objdump.c:#if HAVE_LIBDEBUGINFOD
> binutils/objdump.c:#endif /* HAVE_LIBDEBUGINFOD */
> binutils/readelf.c:#if HAVE_LIBDEBUGINFOD
> binutils/readelf.c:#endif /* HAVE_LIBDEBUGINFOD */
> gdb/top.c:#if HAVE_LIBDEBUGINFOD
>
> OK for master?

Thanks for spotting this. Normally PKG_CHECH_MODULES would correctly
detect whether the .so and header are installed and build accordingly,
but when cross compiling the AC_CHECK_LIB may be needed.

Aaron