[Buildroot] [PATCH 1/2] docs/manual/using-buildroot-debugger: suggest '-ix' iso '-x' when loading gdbinit

[Arnout Vandecappelle]

On 13/09/2021 09:29, Thomas De Schampheleire wrote:
> From: Thomas De Schampheleire <thomas.de_schampheleire at nokia.com>
> 
> A gdbinit file passed via '-x' will be read _after_ parsing any
> object/core file passed on the command-line. In cross-compilation context,
> this is particularly a problem when loading a core file, because without the
> 'sysroot' specified in the gdbinit file, it will give a lot of warnings,
> like:
> 
>      warning: .dynamic section for "/lib/libstdc++.so.6" is not at the expected address (wrong library or version mismatch?)
>      warning: .dynamic section for "/lib/librt.so.1" is not at the expected address (wrong library or version mismatch?)
>      warning: .dynamic section for "/lib/libm.so.6" is not at the expected address (wrong library or version mismatch?)
>      warning: .dynamic section for "/lib/libgcc_s.so.1" is not at the expected address (wrong library or version mismatch?)
>      warning: .dynamic section for "/lib/libc.so.6" is not at the expected address (wrong library or version mismatch?)
>      warning: .dynamic section for "/lib/ld-linux.so.2" is not at the expected address (wrong library or version mismatch?)
>      warning: .dynamic section for "/lib/libanl.so.1" is not at the expected address (wrong library or version mismatch?)
>      warning: .dynamic section for "/lib/libdl.so.2" is not at the expected address (wrong library or version mismatch?)
>      warning: .dynamic section for "/lib/libpthread.so.0" is not at the expected address (wrong library or version mismatch?)
>      warning: .dynamic section for "/usr/lib/libz.so.1" is not at the expected address (wrong library or version mismatch?)
>      warning: .dynamic section for "/lib/libnss_files.so.2" is not at the expected address (wrong library or version mismatch?)
> 
>      warning: Could not load shared library symbols for 17 libraries, e.g. [...]
>      Use the "info sharedlibrary" command to see the complete listing.
>      Do you need "set solib-search-path" or "set sysroot"?
> 
> In contrast, the '-ix' option will load the specified gdbinit file _before_
> parsing object/core files. This will remove said warnings.

  I didn't know this!

  Applied to master, thanks.

  Regards,
  Arnout

> 
> See also: https://sourceware.org/bugzilla/show_bug.cgi?id=28330
> 
> Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire at nokia.com>
> ---
>   docs/manual/using-buildroot-debugger.txt | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/docs/manual/using-buildroot-debugger.txt b/docs/manual/using-buildroot-debugger.txt
> index d5293beb53..9a8a7dfbaf 100644
> --- a/docs/manual/using-buildroot-debugger.txt
> +++ b/docs/manual/using-buildroot-debugger.txt
> @@ -35,7 +35,7 @@ Then, on the host, you should start the cross gdb using the following
>   command line:
>   
>   ----------------------------
> -<buildroot>/output/host/bin/<tuple>-gdb -x <buildroot>/output/staging/usr/share/buildroot/gdbinit foo
> +<buildroot>/output/host/bin/<tuple>-gdb -ix <buildroot>/output/staging/usr/share/buildroot/gdbinit foo
>   ----------------------------
>   
>   Of course, +foo+ must be available in the current directory, built
>