On Mon, May 5, 2025 at 9:30 AM Thomas Weißschuh <linux@xxxxxxxxxxxxxx> wrote: > > On 2025-04-29 22:51:17+0300, Ville Syrjälä wrote: > > On Sat, Mar 15, 2025 at 02:20:14PM +0100, Thomas Weißschuh wrote: > > > -fmacro-prefix-map only affects __FILE__ and __BASE_FILE__. > > > Other references, for example in debug information, are not affected. > > > This makes handling of file references in the compiler outputs harder to > > > use and creates problems for reproducible builds. > > > > > > Switch to -ffile-prefix map which affects all references. > > > > > > Also drop the documentation section advising manual specification of > > > -fdebug-prefix-map for reproducible builds, as it is not necessary > > > anymore. > > > > Hi, > > > > This broke 'objdump -S' completely for me. > > > > I see the following difference in the debug info: > > - <12> DW_AT_name : (indirect line string, offset: 0): drivers/gpu/drm/i915/i915_config.c > > - <16> DW_AT_comp_dir : (indirect line string, offset: 0x23): /home/.../src/linux-2.6/build > > + <12> DW_AT_name : (indirect line string, offset: 0): ../drivers/gpu/drm/i915/i915_config.c > > + <16> DW_AT_comp_dir : (indirect line string, offset: 0x26): /home/.../src/linux-2.6/build > > > > Looks like I can work around it with some combination of --prefix and > > --prefix-strip, but that seems far too tedious to have to do every > > time I need to decode an oops. > > Yeah the --prefix and --prefix-strip mechanism is only an ugly > workaround. > Unfortunately I don't see a nice for this issue at the moment. > > Masahiro, could you revert this commit for now? > I'll try to come up with something better. Could you submit a patch with a commit description? Thanks. -- Best Regards Masahiro Yamada
