Re: No debugsource generated, weird DWARF errors

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Hi Richard,

On Wed, 2020-07-29 at 16:07 +0100, Richard W.M. Jones wrote:
> On Wed, Jul 29, 2020 at 04:11:56PM +0200, Mark Wielaard wrote:
> > Given these are .ml files I suspect it is not gcc, but some other
> > code/DWARF generator issue. Maybe it does use the default
> > (binutils)
> > liker though?
> 
> It uses its own DWARF generator but everything is linked together
> using standard binutils (via GCC).
> 
> > Is there a way to extract the /usr/bin/hacha from the BUILDROOT so
> > we
> > can inspect it?
> 
> I've uploaded the binary which I built on my own machine here:
> 
> http://oirase.annexia.org/tmp/hacha.native

This one looks OK.

> plus some of the *.o files which went into it:
> 
> http://oirase.annexia.org/tmp/myLexing.o
> http://oirase.annexia.org/tmp/myStack.o
> http://oirase.annexia.org/tmp/hacha.o

And so do these.

I also tried to do a mockbuild locally, and that one succeeded.
Don't know what is different from the koji buildroot :{

> I also saved an asm file from one of them which may be helpful:
> 
> http://oirase.annexia.org/tmp/hacha.s

So ml depends on binutils gas to generate the actual debuginfo.
I assume it gets called with: as -g
Is there a way to see how exactly gas is called (with which arguments)?

One of the gas 2.35 features is:

* Add --gdwarf-5 option to the assembler to generate DWARF 5 debug output
  (if such output is being generated).  Added the ability to generate
  version 5 .debug_line sections.

Which is the version that just hit fedora rawhide. Maybe that changed
something about the gas -g output as well?

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