MORE OFFTOPIC Re: I've just released Vasaro

[Iain Buclaw]

On Tuesday, 11 December 2018 at 16:32:31 UTC, Jacob Carlborg 
wrote:
> On 2018-12-11 13:23, Iain Buclaw wrote:
>
>> Dwarf data is emitted on OSX. The section where to find all 
>> debug
>> symbols is prefixed by "__DWARF".  Even DMD does this on OSX. 
>> ;-)
>
> Yes, but the linker strips any sections with the "S_ATTR_DEBUG" 
> flag, which includes the everything in the "__DWARF" segment. 
> Here's my commit message for convenience:
>
> The linker on macOS will remove any debug info, i.e. every 
> section
> with the `S_ATTR_DEBUG` flag, this includes everything in the
> `__DWARF` section. By using the `S_REGULAR` flag the linker 
> will not
> remove this section. This allows to get the filenames and line 
> numbers
> for backtraces from the executable.
>
> Normally the linker removes all the debug info but adds a 
> reference to
> the object files. The debugger can then read the object files 
> to get
> filename and line number information. It's also possible to use 
> an
> additional tool that generates a separate `.dSYM` file. This 
> file can
> then later be deployed with the application if debug info is 
> needed
> when the application is deployed.

Well, as a front-end language dev, how gcc emits things is not my 
bailiwick, just so long as I can guarantee language semantics. :-)